关于汽车的论文3000字,带英语部分
关于汽车英语作文（通用19篇）
汽车英语作文关于汽车英语作文（通用19篇）在平平淡淡的日常中，大家总免不了要接触或使用作文吧，写作文可以锻炼我们的'独处习惯，让自己的心静下来，思考自己未来的方向。
那么一般作文是怎么写的呢？下面是小编为大家收集的关于汽车英语作文，仅供参考，希望能够帮助到大家。
汽车英语作文篇1With the development of the modern technology,private car is no longer a luxurious thing for ordinary people,more and more people drive to work instead of going by bus.The popularization of private car has many advantages.First, it is very convenient and time-saving ,you can drive your own car to the workplace instead of waiting for the crowded bus and afraid of being late for working.Second,it can also improve the traffic structure,and help to mitigate the streof the traffic.Third, the popularization of private car can help to promote the car industry and any other interrelated industries.I believe that in the future the private car will become the most important vehicle and we cannt live without it.汽车英语作文篇2some industry insiders claim, "china which used to be a state on two wheels will some day be a state on four wheels." with the level of life raised, more families will prefer to buy cars. cars provide speed, comfort and convenience in getting around. as the product of modern civilization, cars are likely to play a vital part in daily activities of chinese.obviously, cars, like anything else, have more than one face to families in china. lets have a closer look at the present situation. we may find that though some people can afford them, crowded streets, limited parking lots (停车场) and costly maintenance (保养)are headaches to private car drivers.although private car drivers have some troubles, driving a car indicates the trend of modern living. with low ta, sufficient highway development and parking lots, cars are bound to be household vehicles with high performance. then private cars will enjoy more popularity.汽车英语作文篇3With the development of the modern technology,private car is no longer a luxurious thing for ordinary people,more and more people drive to work instead of going by bus. The popularization of private car has many advantages.First, it is very convenient and time-saving,you can drive your own car to the workplace instead of waiting for the crowded bus and afraid of being late for working.Second,it can also improve the traffic structure,and help to mitigate the stress of the traffic.Third,the popularization of private car can help to promote the car industry and any other interrelated industries. I believe that in the future the private car will become the most important vehicle and we cannt live without it.汽车英语作文篇4Cars are an important part of life in the United States. Cars have made the United Slates a nation on wheels.There are 3 main reasons why the car has become so popular in this country. First of all, Americans like to travel. The car provides the most comfortable and cheapest form of transportation. With a car people can go any place without spending a lot of moncy.The second reason that cars are popular is the fact that theUnited States never really developed an efficient and inexpensive form of public transportation. Long-distance trains have never been as common in the United States as they are in other parts of the world. Air-service provides a comfortable travel system. But it is too expensive to be used frequently.The third reason is the most important one, though. The American spirit of inde pendence is what really made cars popular. Americans do not like to wait for a bus, or a train or even a plane. They do not like to have to follow an exact schedule. A car gives them the frecdom to schedule their own time, and this is the freedom that Americans want most to have.汽车英语作文篇5Cars have created a lot of serious problems in our world. All the time, they are pumping huge amounts of waste gases into the atmosphere, causing disease and even death.One possible solution is to design and develop clean cars and clean fuels. But it may take decades for the new models to completely replace the traditional ones.Another solution is to develop modern public transportation systems and restrict the use of private cars. If the price of petrol rises constantly and the public vehicles are efficient and convenient enough, most people will not drive private cars. On the whole, the elimination of air pollution needs the co-efforts from the government and the public. This problem will be solved only with the help of science and technology.汽车英语作文篇6With the development of modern industry,more and more families are able to have their own cars.But,seeing the problems like air pollution and the reduction of resources,some people appeal for the reduction of private cars.Still,I think there is everyreason for the even faster development of the car industry.Thanks to the development of the car industry, we do not have to cram in the buses, but can enjoy free travel in our. own cars, we can go to more places in a leisure way. Transportation becomes comfortable and easy. But there are those who worry that too many cars may cause more traffic problems, serious:air pollution and the exhaustion ofresources, While these problems may be true, they can be solved and some are being solved. For example, we can invent cars that: can save fuel or use other types of energy so that cars can still ＇be used even though resources run short. To reduce pollution, people have manufactured many cars without pollution. We can relieve the traffic pressure by building more and more roads or-adopt computer-monitored automated highways.For all the contemporary problems cars bring, no one can deny the convenience cars bring us and ignore the effort We make to solve these problems. Therefore,the development of the car industry is necessary, and it should develop as quickly as possible.汽车英语作文篇7Too many cars have caused a lot of serious problems in our world.Besides congestion, accidents and fast fuel consumption, cars are responsible for a good part of air pollution in big cities.One possible solution is to design and develop clean cars and clean fuels.In Shanghai, some of the public buses begin to run on natural gas, which does not give off as much carbon dioxide as petrol.Another solution is to develop modern public transportationsystems and restrict the use of private cars.If the price of petrol rises constantly and the public vehicles are efficient and convenient enough, most people will not buy private cars.Thus, the total number of cars in big cities will reduce greatly.On the whole, the elimination of air pollution needs the collective efforts from the government, the public and the environmentalists.汽车英语作文篇8A kind of little car may someday take the place of today's big ones. If people drive such cars in the future, there will be less pollution in the air. There will be more space for parking in cities. The streets will be less crowded. And driving will be safer as these little cars can go only 65 km per hour. The future cars will be fine for getting round a city, but they will not be useful for long trips. Little cars will go 200km, before needing to stop for more gas. If big cars are still used along with the small ones, two sets of roads will be needed in the future. Some roads will be used for the big fast cars and other roads will be needed for the slow and small ones. It's said that three such little cars fit in the space now needed for one car the usual size.汽车英语作文篇9Along with the economic growth, private cars have penetrated into a wealth of citizens lives because of its convenience features. Undoubtedly, the widespread use of cars promotes the social productivity and enhances the economic development. But we are supposed to weigh strengths and weaknesses of the popularity of cars. With the growing prevalence of vehicles, a host of problems have emerged.To begin with, car emissions are having an immeasurableeffect on the worlds climate. Solid scientific evidence can confirm this harm. Secondly, because the car depends so heavily on fossil fuels, it is a major source of carbon dioxide that causes global warming. Additionally, soaring ownership of cars puts tremendous pressure on the limited capacity of current transport system. There is a heavy urban traffic flow with frequent traffic jam. These harmful side effects of autos burden our society with unacceptable costs to human health, the environment, and our economy.汽车英语作文篇10Traffic jam is a growing problem in our cities and it is becoming more and more serious as the city’s developing.As a result of traffic growing,the city’s pollution is growing,too.And in some point,we can say it is a big soruce of pollution in cities.The Cars play an important role in modern society. But they are also responsible for a good part of air pollution in big cities.The carbon dioxide is the outcome of transportation and it seriously cause the greenhouse effect.As we know,the sulfur dioxide and nitric oxide are also making by cars.And this two kinds of gas play more important role in city pollution.For people, especially children and elderly people, with breathing problems, polluted air can be very harmful, sometimes even fatal.In a word ,when you enjoy all the conveniences that the city has to offer, you are paying a price also because the city is more polluted and crowded.And we have to say traffic is a big source of pollution in cities.汽车英语作文篇11Since the 1970s, with the worsening oil crisis, the major businesses in the automotive internal combustion engine asmuch as possible to reduce the car's fuel consumption, while sparing no effort in the development of hybrid vehicles and new energy vehicles. There are hybrid gas-electric hybrid and mixed fuel in two forms, both in the car body design is no different with the traditional internal combustion engine vehicles, the future trend is nothing more than a continuation of current trends, efforts to reduce the drag coefficient, reducing weight while increasing strength and stiffness and so on.Hybrid vehicle technology only in the product over, to really new energy vehicles, preparatory and experimental products, the ultimate trend or completely replace the existing traditional energy vehicles by the new energy vehicles.汽车英语作文篇12Some industry insiders claim, “China which used to be a state on two wheels will some day be a state on four wheels.” With the level of life raised, more families will prefer to buy cars. Cars provide speed, comfort and convenience in getting around. As the product of modern civilization, cars are likely to play a vital part in daily activities of Chinese.Obviously, cars, like anything else, have more than one face to families in China. Lets have a closer look at the present situation. We may find that though some people can afford them, crowded streets, limited parking lots and costly maintenance are headaches to private car drivers.Although private car drivers have some troubles, driving a car indicates the trend of modern living. With low tax, sufficient highway development and parking lots, cars are bound to be household vehicles with high performance. Then private cars will enjoy more popularity.汽车英语作文篇13Private cars have entered Chinese families. More and morepeople drive to work in their own ears. And it seems a trend that all can possess a family car in the future.But is it really good to have a car? Owning a car means spending time and money buying, learning to drive and repairing it. So you seem to pay a lot for a big trouble. Besides, if every family has a car, what will the road be like? Crowded? Jammed with... Oh, my God!Family cars are intended to be convenient, but will it really bring convenience to the everyday life in a country with such a large population? Moreover, driving cars will very likely make people sit all the time without any exercises. It will do harm to the physical body. Comparatively, riding bicycles is mtIch better and economical. So,I think, it is not appropriate for China to popularize family cars in the near future, especially in our big densely-populated cities.汽车英语作文篇14Since their coming into being, automobiles have been significantly contributing to human industries, agricultures, and even the daily lives.It is automobiles that have been shaping and reflecting the ways humans work and think. They accelerate the sustainable economic development. They boost industries. They also catalyze scientific research.But nobody can deny that automobiles have also exerted some unfavorable impacts on social and economic fabric. First of all, they have seriously polluted the environment in which humans survive. Secondly, traffic jam wastes lots of time. Finally, they also waste the money, especially in metropolis.My opinion is that in the foreseeable future, scientists will be able to solve all problems. Exactly, human will eventually be ableto minimize the harmful effects of automobiles, whereas their advantages can be maximized.汽车英语作文篇15along with the economic growth, private cars have penetrated int o a wealth of citizens’ lives because of its convenience features. undoubtedly, the widespread use of cars promotes the social productivity and enhances the economic development. but we are supposed to weigh strengths and weaknesses of the popularity of cars. with the growing prevalence of vehicles, a host of problems have emerged.in the first place , car emissions are having an immeasurable effect on the world’s climate. solid scientific evidence can confirm this harm. second, because the car depends so heavily on fossil fuels, it is a major source of carbon dioxide that causes global warming. additionally, soaring ownership of cars puts tremendous pressure on the limited capacity of current transport system. there is a heavy urban traffic flow with frequent traffic jam. these harmful side effects of autos burden our society with unacceptable costs to human health, the environment, and our economy.so we must reverse this rising trend and promote the mass transportation. our heavy reliance on private cars must be reduced.汽车英语作文篇16Too many cars have created a lot of serious problems in our world. Besides congestion, accidents and fast fuel consumption, cars are responsible for a good part of air pollution in big cities. All the time, they are pumping huge amounts of waste gases into the atmosphere. These gases are very harmful, causing disease and even death. One possible solution is to design and developclean cars and clean fuels. In Shanghai, some of the public buses begin to run on natural gas, which does not give off as much carbon dioxide as the petrol. But it may take decades for the new models of clean cars completely replace the traditional ones. Another solution is to develop modern public transportation systems and restrict the use of private cars. If the price of petrol rises constantly and the public vehicles are efficient and convenient enough, most people will not buy private cars. And the total number of cars in big cities will reduce greatly. On the whole, the elimination of air pollution needs the collective efforts from the government, the public and the environmentalists.汽车英语作文篇17too many cars have created a lot of serious problems in our world. besides congestion, accidents and fast fuel consumption, cars are responsible for a good part of air pollution in big cities.all the time, they are pumping huge amounts of waste gases into the atmosphere. these gases are very harmful, causing disease and even death. one possible solution is to design and develop clean cars and clean fuels. in shanghai, some of the public buses begin to run on natural gas, which does not give off as much carbon dioxide as the petrol.but it may take decades for the new models of clean cars completely replace the traditional ones. another solution is to develop modern public transportation systems and restrict the use of private cars. if the price of petrol rises constantly and the public vehicles are efficient and convenient enough, most people will not buy private cars.and the total number of cars in big cities will reduce greatly. on the whole, the elimination of air pollution needs the collective efforts from the government, the public and theenvironmentalists.汽车英语作文篇18In nowadays,as the increasing of people’s living level,more and more families buy cars for the convenience of living necessary.However, Too many cars have created a lot of serious problems in our world. Besides congestion, accidents and fast fuel consumption, cars are responsible for a good part of air pollution in big cities. All the time, they are pumping huge amounts of waste gases into the atmosphere. These gases are very harmful, causing disease and even death.One possible solution is to invent and develop clean cars and clean fuels. In the world, buses in some cities are driven by electricity, while others begin to use natural gas, which does not give off as much carbon dioxide as the petrol. But it may take decades for the new models of clean cars to completely replace the traditional ones.Another solution is to develop modern public transportation systems and restrict the use of private cars. If the price of petrol rises constantly and the public vehicles are efficient and convenient enough, most people will not private cars. And the total number of cars in big cities will reduce greatly.汽车英语作文篇19Americans like to go out by car. Although more and more Chinese own cars,most Chinese still like to ride bicycles, This is determined by a lot of factors.As we all know, the bike advances slowly by manpower, but it can be placed wherever it is convenient However, as for the car, although it can run fast by engine, it must be parked at parking places.Most Americans live in the suburb which is far from urban areas and their working places. So they need cars to go shopping and go to work. And they also like traveling far. Thus a car brings them great convenience. On the contrary, most Chinese live near their working areas and markets. They don't need a car to go to work or go shopping.I would like to ride a bike, because it costs little and it is easy to use and won't cause pollution.。
私家车辩论英语作文
私家车辩论英语作文English: Private cars have been a controversial topic for quite some time now, with arguments for both sides. On one hand, private cars provide convenience and flexibility for individuals to travel at their own pace and time. They offer a sense of independence and freedom that public transportation may not be able to provide. Private cars also allow for more privacy and comfort during travel, especially for those with specific needs or preferences. However, on the other hand, private cars contribute significantly to air pollution and traffic congestion in urban areas. The carbon emissions from private carsare a major contributor to global warming and climate change. The dependence on private cars also leads to the overuse of fossil fuels and the degradation of natural resources. In order to address these issues, it is important for individuals to consider alternative modes of transportation such as cycling, walking, or using public transportation whenever possible.中文翻译: 私家车长期以来一直是一个有争议的话题，双方都有各自的论点。
汽车利与弊的英文作文
汽车利与弊的英文作文英文：As a car, it has both advantages and disadvantages. On one hand, owning a car can bring convenience to our daily life. We can go anywhere we want without worrying about the time and distance. For example, when I have a car, I can easily go to work, go shopping, or travel to other cities. It saves me a lot of time and energy compared to taking public transportation or walking. Moreover, a car can also improve our social status and image, especially in some occasions, such as attending important meetings or events.On the other hand, cars also have some negative impacts on our life and environment. Firstly, it causes air pollution and noise pollution, which seriously affect our health and quality of life. Secondly, the increasing number of cars on the road leads to traffic congestion and accidents. Thirdly, owning a car requires a lot of money, including purchasing, maintaining, and fueling. It maybecome a financial burden for some people, especially for those who have low income.In conclusion, cars have both pros and cons. We should weigh the advantages and disadvantages before making a decision to buy a car. We should also take some measures to reduce the negative impacts of cars on our environment and society.中文：作为一种交通工具，汽车既有利又有弊。
关于汽车英语作文(精选22篇)
关于汽车英语作文（精选22篇）汽车英语作文 1Many years ago, I saw an interesting movie. It pictured thefuture life that people could fly in the sky by cars. Of course, I don’t think it will happen in the coming time. The change in cars is about the energy. It is said that the cars will use both electricity and gasoline, which can reduce pollution. I think it is a great change for cars. More and more people have cars now and the gas they release brings heavy pollution to the air, which damages our health. The cars can use electricity in the long trip. When it runs out of it, then gasoline can be a substitute.许多年前，我看了一部有趣的电影。
电影描绘的是未来的生活，那时候的人们可以坐汽车在天空中飞翔。
当然，我不认为这样的情况会在未来发生，因为汽车的变化主要在能源方面。
据说汽车将使用电油结合，这样就可以减少污染。
我认为这对汽车来说是一个巨大的变化。
现在越来越多的'人拥有汽车，这些车释放的尾气给空气带来了严重的污染，这损害了我们的健康。
汽车可以在长途旅行中先用电，电耗尽时，汽油就可以替换使用。
汽车英语作文 2With the development of modern industry,more and more families are able to have their own cars.But,seeing the problems like air pollution and the reduction of resources,some people appeal for the reduction of private cars.Still,I think there is every reason for the even faster development of the car industry.Thanks to the development of the car industry, we do not have to cram in the buses, but can enjoy in our free travel.With our own cars, we can go to more places in a leisure way. Transportation becomes comfortable and easy. But there are those who worry that too many cars may cause more traffic problems, serious:air pollution andthe exhaustion ofresources, While these problems may be true, they can be solved and some are being solved. For example, we can invent cars that can save fuel or use other types of energy so that cars can still be used even though resources run short. To reduce pollution, people have manufactured many cars without pollution. We can relieve the traffic pressure by building more and more roads or-adopt computer-monitored automated highways.For all the contemporary problems cars bring, no one can deny the convenience cars bring us and ignore the effort that we make to solve these problems. Therefore,the development of the car industry is necessary, and it should develop as quickly as possible.随着现代工业的发展，越来越多的家庭能够拥有自己的轿车。
关于汽车的作用英语作文
关于汽车的作用英语作文The Role of Automobiles。
Automobiles have become an indispensable part of our daily life. They have revolutionized the way we travel, work and live. Automobiles have made transportation faster, easier and more convenient. They have also created new industries and jobs, and have contributed greatly to the economy of many countries.The most obvious role of automobiles is transportation. They have made it possible for people to travel long distances quickly and comfortably. Cars have also made it easier for people to commute to work and school, and have allowed businesses to transport goods more efficiently. With the development of highways and roads, automobiles have made it possible for people to travel to remote areas and explore new places.In addition to transportation, automobiles have alsocreated new industries and jobs. The automotive industry is one of the largest industries in the world, employing millions of people worldwide. The production, sales and maintenance of automobiles have created jobs in manufacturing, engineering, design, sales, marketing and many other fields. The automobile industry has also stimulated the growth of other industries, such as the oil industry, tire industry and steel industry.Furthermore, automobiles have contributed greatly to the economy of many countries. The production and sales of automobiles generate billions of dollars in revenue each year. The automobile industry is a major source of tax revenue for governments, and the sale of automobiles contributes to the growth of other industries, such as the insurance industry, finance industry and service industry.However, automobiles also have some negative effects on the environment and society. The production and use of automobiles contribute to air pollution, global warming and traffic congestion. Automobile accidents also cause thousands of deaths and injuries each year.In conclusion, automobiles have played a significantrole in our society. They have made transportation faster, easier and more convenient, created new industries and jobs, and contributed greatly to the economy of many countries. However, we should also be aware of the negative effects of automobiles on the environment and society, and take stepsto minimize these effects.。
关于汽车方面英文作文
关于汽车方面英文作文英文：As a car enthusiast, I have a lot to say about cars. First of all, I think cars are not just a means of transportation, but also a symbol of personal identity and style. People choose their cars based on their own preferences and needs, and some even modify their cars to make them more unique and personalized.Another thing I want to talk about is the importance of maintenance. A well-maintained car can not only last longer, but also perform better and be safer to drive. Regular oil changes, tire rotations, and tune-ups are essential to keep the car in good condition. I always make sure to follow the manufacturer's recommended maintenance schedule and take my car to a trusted mechanic for any repairs or inspections.In terms of driving, I believe in defensive driving and following traffic rules. Speeding and reckless driving notonly put yourself in danger, but also endanger others on the road. It's important to always be aware of your surroundings and anticipate potential hazards.Finally, I want to mention the environmental impact of cars. As much as I love driving, I also recognize the negative effects of car emissions on the environment.That's why I try to minimize my driving when possible and opt for public transportation or walking instead. When I do drive, I make sure to drive efficiently and reduce my carbon footprint by carpooling or using a hybrid orelectric car.中文：作为一名汽车爱好者，我对汽车有很多话要说。
关于汽车的英语作文（5篇）
关于汽车的英语作文（5篇）第一篇：关于汽车的英语作文好的Nowadays, with the rapid improvement of people’s living standards, cars have become an indispensable part of people's lives,so that more and more people have a car of their own, especially in cities.It brings some benefits for us but also causes many problems at the same time.For one thing,there’s no doubt that cars provide much convenience for people to go where they want to quickly and easily.Especially on weekday,driving a car can save a lot of time for us to go to work.When some places are too far away from our home, driving our own car is also convenient, we can go wherever we want.However,for another, too many cars will lead to the pressure of public transport, a series of problems will appear.First of all,it will bring about more air pollution,a large amount of polluted air given off by cars do great harm to our health.What’s more, as the existing roads are not so wide for the increasing number of cars,undoubtedly,traffic jams will become more and more st but not least, cars also place burden on the public facilities in providing more parking lots.As far as I am concerned,everything has its advantages and disadvantages.It’s high time that eff ective action must be token to limit the ever growing number of cars, the government should take measures to control the air pollution from the cars.Some roads should be widened and more new roads should be constructed.Only in this way，will people benefit from the popularity of cars.坏的Nowadays, with the rapid improvement of people's living standards, cars have become an indispensable part of people'slives,so that more and more people have a car of their own, especially in cities.It brings some benefit for us but also causes many problems at the same time.For one thing,it's no doubt that that cars provide much convenience for people to go where they want to quickly and easily.Especially on weekday,driving a car can save a lot of time for us to go to work.When some places are too far away from our home, driving our own car is also convenient, we can go wherever we want.However,for another, too many cars will lead to the pressure of public transport, a series of problems will appear.First of all,it will bring about more air pollution,a large amount of polluted air given off by cars do great harm to our health.What's more, as the existing roads are not so wide for the increasing number of cars,undoubtedly,traffic jams will become more and more st but not least, cars also place burden on the public facilities in providing more parking lots.As far as I am concerned,everything has its advantages and disadvantages.It's high time that effective action must be token to limit the ever growing number of cars, the government should take measures to control the air pollution from the cars.Some roads should be widened and more new roads should be constructed.Only in this way,will people benefit from the popularity of cars.第二篇：关于汽车的英语作文好的Nowadays, with the rapid i mprovement of people’s living standards, cars have become an indispensable part of people's lives,so that more and more people have a car of their own, especially in cities.It brings some benefits for us but also causes many problems at the same time.For o ne thing,there’s no doubt that cars provide much convenience for people to go where they want to quickly and easily.Especially onweekday,driving a car can save a lot of time for us to go to work.When some places are too far away from our home, driving our own car is also convenient, we can go wherever we want.However,for another, too many cars will lead to the pressure of public transport, a series of problems will appear.First of all,it will bring about more air pollution,a large amount of polluted air gi ven off by cars do great harm to our health.What’s more, as the existing roads are not so wide for the increasing number of cars,undoubtedly,traffic jams will become more and more st but notleast, cars also place burden on the public facilities in providing more parking lots.As far as I am concerned,everything has its advantages and disadvantages.It’s high time that effective action must be token to limit the ever growing number of cars, the government should take measures to control the air pollution from the cars.Some roads should be widened and more new roads should be constructed.Only in this way，will people benefit from the popularity of cars.坏的Nowadays, with the rapid improvement of people's living standards, cars have become an indispensable part of people's lives,so that more and more people have a car of their own, especially in cities.It brings some benefit for us but also causes many problems at the same time.For one thing,it's no doubt that that cars provide much convenience for people to go where they want to quickly and easily.Especially on weekday,driving a car can save a lot of time for us to go to work.When some places are too far away from our home, driving our own car is also convenient, we can go wherever we want.However,for another, too many cars will lead to the pressure of public transport, a series of problems will appear.First of all,it will bring about more air pollution,a large amount of polluted air given off by cars do great harm to ourhealth.What's more, as the existing roads are not so wide for the increasing number of cars,undoubtedly,traffic jams will become more and more st but not least, cars also place burden on the public facilities in providing more parking lots.As far as I am concerned,everything has its advantages and disadvantages.It's high time that effective action must be token to limit the ever growing number of cars, the government should take measures to control the air pollution from the cars.Some roads should be widened and more new roads should be constructed.Only in this way,will people benefit from the popularity of cars.第三篇：英语作文——交通问题(汽车)汽车（交通问题）Automobile, the most pervasive and persuasive of modern technologies, marked by rapid change and growth ,is moving into a new era ,an era of extraordinary sophistication and versatility, which promises to reshape our lives and our world.Discussion on the duality has become very popular in newspapers or in people's chats.On the one hand, no one denies that automobile is currently one of the most useful transportation in our daily life.On the other hand, the automobile is more of a trouble as its abundance results in frequent traffic jams.The harm and loss they cost are incalculable.Heavy traffic will make much time waste for nothing and accidents happen form time to time.In addition, more and more private cars will make environmental pollution more serious, which will do harm to human beings.In my opinion, it is high time for the whole people to reduce the frequency of traffic jams.The first step should be to fundamentally change lifestyles so that the car is no longer part and parcel of everyday ernments also need toapply attractive measures to draw citizens to adopt means of public transportation, for instance, to reduce prices and improve relevant facilities.译文：汽车，这项从迅速变化和成长为标志的最普及和最有影响力的现代技术，正在步入一个新时代，一个极为成熟和多样化的时代，这将重塑我们的生活和世界。
汽车利弊的英文作文
汽车利弊的英文作文英文：As a car owner, I have experienced both the advantages and disadvantages of owning a car. On one hand, having a car provides convenience and freedom. I can go wherever I want, whenever I want, without having to rely on public transportation schedules. It also saves time and energy, especially when I have to carry heavy items or travel long distances.On the other hand, owning a car also comes with a lot of expenses. The cost of purchasing a car, maintaining it, and filling it up with gas can add up quickly. In addition, there are also parking fees, tolls, and insurance premiums to consider. Moreover, driving a car can also be stressful, especially in heavy traffic or bad weather conditions.Despite the drawbacks, I still believe that owning a car is worth it for me. It allows me to have more controlover my schedule and gives me the flexibility to travel to different places. Plus, there's a certain sense of prideand independence that comes with owning a car.中文：作为一名汽车车主，我经历过拥有汽车的优点和缺点。
汽车优点缺点英语作文
汽车优点缺点英语作文Title: Advantages and Disadvantages of Automobiles。
Automobiles, undoubtedly, have revolutionized transportation, offering unparalleled convenience and mobility to individuals across the globe. However, like any technological innovation, they come with their own set of advantages and disadvantages.Advantages:1. Convenience: One of the primary advantages of automobiles is the convenience they offer. With a car, individuals can travel from one place to another at their preferred time and pace, without being bound by the schedules of public transportation.2. Mobility: Automobiles provide unmatched mobility, allowing people to reach destinations that may not beeasily accessible by other means of transport. Thismobility is particularly beneficial in rural areas with limited public transportation infrastructure.3. Independence: Car ownership grants individuals a sense of independence and autonomy. They have the freedomto choose their routes, travel companions, and schedule without relying on external factors.4. Time-saving: Automobiles save valuable time by reducing travel durations compared to public transportation. This time efficiency becomes especially crucial in emergency situations or when commuting long distances.5. Comfort: Modern automobiles are designed withvarious amenities to enhance passenger comfort, such as climate control systems, ergonomic seating, and entertainment options. This makes long journeys more tolerable and enjoyable.6. Cargo Transportation: Automobiles facilitate the transportation of goods and materials, supportingindustries such as logistics, delivery services, andcommerce. They enable businesses to operate efficiently by ensuring timely delivery of products.Disadvantages:1. Environmental Impact: Perhaps the most significant disadvantage of automobiles is their adverse impact on the environment. The combustion of fossil fuels by internal combustion engines releases greenhouse gases and pollutants, contributing to air pollution and climate change.2. Traffic Congestion: The proliferation of automobiles has led to increased traffic congestion in urban areas, resulting in wasted time, fuel, and productivity. Traffic jams also contribute to stress and frustration among commuters.3. Safety Concerns: Despite advancements in automotive safety technology, accidents remain a major concern. Car accidents can result in injuries, fatalities, and property damage, highlighting the need for continuous efforts to improve road safety.4. Dependency on Fossil Fuels: Most automobiles rely on fossil fuels such as gasoline and diesel, which are finite resources with environmental repercussions. Dependence on fossil fuels also makes economies vulnerable to price fluctuations and geopolitical instability.5. Infrastructure Costs: The construction and maintenance of roads, highways, and parking facilitiesincur substantial infrastructure costs, which are often borne by taxpayers. Moreover, urban sprawl driven by automobile-centric planning exacerbates these costs.6. Sedentary Lifestyle: Overreliance on automobiles contributes to a sedentary lifestyle, as people opt for driving over walking or cycling for short-distance trips. This lack of physical activity can lead to various health issues, including obesity and cardiovascular diseases.In conclusion, automobiles have undoubtedly transformed modern society, offering unparalleled convenience and mobility. However, their widespread use comes withsignificant drawbacks, including environmental degradation, traffic congestion, and safety concerns. As we navigate the future of transportation, it is imperative to address these challenges through sustainable practices, technological innovations, and urban planning strategies that prioritize the well-being of both individuals and the planet.。
汽车优缺点英语作文
The automobile has become an integral part of modern society,offering a wide range of benefits and conveniences but also presenting certain drawbacks.Here is an essay discussing the advantages and disadvantages of owning a car.Advantages of Owning a Car:1.Convenience:Cars provide a high level of convenience,allowing individuals to travel at their own pace and according to their own schedule.This is particularly useful for commuting to work,running errands,or traveling long distances.2.TimeSaving:Owning a car can save a significant amount of time compared to relying on public transportation.There is no need to wait for buses or trains,and one can avoid the delays that are common in public transit systems.3.Freedom and Flexibility:A car offers the freedom to travel wherever and whenever one wishes.This flexibility is especially beneficial for families who need to move around together or for individuals who enjoy spontaneous trips.fort:Cars provide a comfortable mode of transportation,with the ability to control the environment inside the vehicle,such as temperature and music.5.Safety:Modern cars are equipped with numerous safety features,including airbags, antilock braking systems,and electronic stability control,which can significantly reduce the risk of accidents.6.Status Symbol:For some,owning a car,especially a luxury or highperformance vehicle,is a status symbol that reflects success and social standing. Disadvantages of Owning a Car:1.Cost:Cars are expensive to purchase,maintain,and operate.The costs include fuel, insurance,repairs,and regular maintenance,which can add up over time.2.Environmental Impact:Cars contribute to air pollution and climate change due to the emissions they produce.This is a significant concern in todays world where environmental sustainability is a priority.3.Traffic Congestion:With the increasing number of cars on the road,traffic congestion has become a common issue in many cities,leading to increased travel times and frustration.4.Parking Issues:Finding a parking spot in crowded urban areas can be a challenge,and parking fees can add to the overall cost of owning a car.5.Dependency:Relying on a car for transportation can lead to a lack of physical activity, contributing to health issues such as obesity and related conditions.6.Accidents:Despite safety features,car accidents are still a risk,and they can result in injury,death,or property damage.In conclusion,while cars offer numerous benefits such as convenience,timesaving,and comfort,they also come with significant drawbacks including high costs,environmental impact,and potential safety concerns.It is essential for individuals to weigh these factors when deciding whether owning a car is the right choice for them.。
汽车的利与弊英语作文
汽车的利与弊英语作文英文回答：As for the advantages of cars, there are several key points to consider. Firstly, cars provide a great deal of convenience and flexibility in terms of transportation. With a car, I can travel to various places at my own pace and on my own schedule, without having to rely on public transportation. This is especially useful when I need to run errands, go to work, or travel long distances. Additionally, cars offer a sense of independence and freedom, allowing me to explore new places and have spontaneous adventures.Another benefit of cars is the comfort and privacy they provide. I can listen to my favorite music, adjust the temperature to my liking, and have private conversations with my passengers without the intrusion of strangers. This level of comfort and privacy is something that public transportation cannot always offer.Furthermore, cars can be a safer option in certain situations. For example, if I need to travel late at night or in an area with limited public transportation, having a car can provide a sense of security and peace of mind. In emergency situations, having a car readily available can be a lifesaver.On the other hand, there are also some drawbacks to consider when it comes to cars. One of the most significant disadvantages is the environmental impact of car emissions. Cars contribute to air pollution and greenhouse gas emissions, which can harm the environment and contribute to climate change. This is a serious concern that cannot be overlooked.Additionally, the cost of owning and maintaining a car can be quite high. From purchasing the car itself to paying for fuel, insurance, and regular maintenance, the expenses can add up quickly. This financial burden can be a significant drawback for many people, especially those on a tight budget.Another downside of cars is the potential for accidents and traffic congestion. With more cars on the road, therisk of accidents increases, and traffic jams become more common. This can lead to frustration, stress, and wasted time for drivers.中文回答：至于汽车的优点，有几个关键点需要考虑。
有关汽车英语作文(通用18篇)
有关汽车英语作文（通用18篇）汽车英语作文 1With the development of the moderntechnology,private car is no longer a luxurious thing for ordinary people,more and more people drive to work instead of going by bus. The popularization of private car has many advantages.First, it is very convenient and time-saving,you can drive your own car to the workplace instead of waiting for the crowded bus and afraid of being late for working.Second,it can also improve the trafficstructure,and help to mitigate the stress of the traffic.Third,the popularization of private car can help to promote the car industry and any other interrelated industries. I believe that in the future the private car will become the most important vehicle and we cannt live without it.随着现代科技的发展，对于普通人来说私家车不再是豪华的。
越来越多的人开车上班而不是乘公共汽车去。
私家车的普及有很多好处。
首先，它非常方便、节省时间。
你可以开自己的车去工作而不是等待拥挤的公共汽车，害怕上班迟到。
汽车类英语作文带翻译
汽车类英语作文带翻译Title: The Future of Automobiles: Innovation and Sustainability。
In recent years, the automotive industry has undergone a profound transformation, driven by technological advancements and a growing emphasis on sustainability. This essay will explore the key trends shaping the future of automobiles and their implications.Firstly, one of the most significant trends in the automotive industry is the rise of electric vehicles (EVs). With concerns over climate change and air pollution, there has been a global push towards reducing greenhouse gas emissions, and EVs offer a promising solution. Companies like Tesla, Nissan, and BMW have invested heavily in EV technology, leading to improved battery efficiency, longer ranges, and faster charging times. As a result, EVs are becoming increasingly popular among consumers, with sales expected to continue rising in the coming years.In addition to EVs, autonomous driving technology is another major development that is reshaping the automotive landscape. Companies such as Google's Waymo, Uber, and traditional automakers like Ford and General Motors are investing billions of dollars in developing self-driving cars. These vehicles have the potential to revolutionize transportation, making it safer, more efficient, and accessible to people who are unable to drive, such as the elderly or disabled. However, there are still significant technical and regulatory challenges that need to be overcome before autonomous vehicles can become mainstream.Furthermore, there is a growing focus on sustainability and eco-friendliness in the automotive industry. This includes not only the development of electric and hybrid vehicles but also efforts to reduce the environmental impact of traditional gasoline-powered cars. For example, many automakers are exploring alternative fuels such as hydrogen and biofuels, as well as lightweight materials and aerodynamic designs to improve fuel efficiency. Additionally, there is increasing interest in recycling andreusing materials to minimize waste during themanufacturing process.Overall, the future of automobiles is undoubtedly exciting, with rapid advancements in technology and agreater emphasis on sustainability. However, there are also challenges that need to be addressed, such asinfrastructure development for EVs, regulatory frameworksfor autonomous vehicles, and the environmental impact ofcar manufacturing. By working together, industry stakeholders, governments, and consumers can ensure thatthe future of automobiles is not only innovative but also environmentally sustainable.未来汽车，创新与可持续性。
汽车的作用英语小作文
汽车的作用英语小作文Title: The Role of Automobiles in Modern Society。
In contemporary society, automobiles play a pivotalrole in various aspects of human life. Their significance extends far beyond mere transportation, impacting economies, lifestyles, and even the environment. Below, we delve into the multifaceted roles that automobiles fulfill in our modern world.1. Transportation:At its core, the primary function of automobiles is transportation. They provide a convenient and efficient means for individuals to travel from one place to another, whether it be for commuting to work, running errands, or embarking on leisurely journeys. The flexibility offered by automobiles allows people to access remote locations and navigate diverse terrains with relative ease, thusfacilitating mobility and connectivity.2. Economic Impact:Automobiles contribute significantly to economic development and growth. The automotive industry represents a substantial portion of many countries' economies, encompassing manufacturing, sales, maintenance, and related services. The production and sale of automobiles generate employment opportunities across various sectors, ranging from assembly line workers to sales professionals to automotive engineers. Moreover, the demand for automobiles drives innovation and technological advancements, leading to further economic prosperity.3. Social Dynamics:The prevalence of automobiles has reshaped social dynamics and cultural norms. They have revolutionized concepts of distance and proximity, enabling individuals to interact and engage with distant communities more readily. Automobiles have also influenced leisure activities and recreational pursuits, allowing people to explore newdestinations and participate in outdoor adventures. Furthermore, the ownership and use of automobiles have become symbols of status and prestige in many societies, reflecting social hierarchies and aspirations.4. Environmental Considerations:Despite their undeniable benefits, automobiles also pose significant environmental challenges. The combustion of fossil fuels in internal combustion engines contributes to air pollution and greenhouse gas emissions, exacerbating climate change and jeopardizing environmental sustainability. In response, there has been a growing emphasis on developing alternative fuel technologies, such as electric and hydrogen-powered vehicles, to mitigate the environmental impact of automobiles and foster a more sustainable transportation ecosystem.5. Infrastructure Development:The widespread adoption of automobiles necessitates the development of robust transportation infrastructure,including roads, highways, bridges, and tunnels. Investment in transportation infrastructure not only supports the efficient movement of vehicles but also stimulates economic growth through job creation and enhanced connectivity. Moreover, advancements in infrastructure, such asintelligent transportation systems and smart highways, improve safety, efficiency, and traffic management, enhancing the overall quality of the transportation experience.6. Personal Freedom and Independence:Automobiles afford individuals a sense of personal freedom and independence by granting them autonomy over their mobility choices. Unlike public transportation systems, which operate on fixed schedules and routes, automobiles offer unparalleled flexibility and convenience, allowing people to tailor their travel experiences according to their preferences and schedules. This freedom of movement empowers individuals to pursue opportunities, explore new horizons, and live life on their own terms.In conclusion, automobiles serve as indispensable tools that permeate every facet of modern society. From facilitating transportation and driving economic growth to shaping social interactions and influencing environmental policies, automobiles play a pivotal role in shaping the world we inhabit. However, as we embrace the benefits of automobile technology, it is imperative to address the associated challenges, such as environmental degradation and traffic congestion, to ensure a sustainable and equitable future for generations to come.。
汽车类英语作文带翻译
汽车类英语作文带翻译The Impact of Automobiles on Modern Society。
汽车作为现代社会的重要交通工具，对我们的生活产生了深远影响。
本文将探讨汽车对环境、经济和个人生活的影响，并提出应对这些影响的可行建议。
Introduction。
In modern society, automobiles play a crucial role in transportation, profoundly impacting our daily lives. This essay explores the effects of automobiles on the environment, economy, and individual lifestyles, along with proposed strategies to mitigate these impacts.Environmental Impact。
Automobiles significantly contribute to environmental issues. The combustion engines in cars emit pollutants like carbon dioxide, nitrogen oxides, and particulate matter,leading to air pollution and climate change. Deforestation for road construction and oil extraction further degrade ecosystems. The growing number of vehicles also intensifies congestion, noise pollution, and habitat fragmentation.Economic Impact。
有关汽车英语作文3篇
汽车英语作文有关汽车英语作文3篇在平平淡淡的日常中，大家最不陌生的就是作文了吧，借助作文人们可以实现文化交流的`目的。
那要怎么写好作文呢？以下是小编精心整理的汽车英语作文3篇，仅供参考，希望能够帮助到大家。
汽车英语作文篇1Cars have created a lot of serious problems in our world.All the time, they are pumping huge amounts of waste gases into the atmosphere, causing disease and even death.One possible solution is to design and develop clean cars and clean fuels.But it may take decades for the new models to completely replace the traditional ones.Another solution is to develop modern public transportation systems and restrict the use of private cars.If the price of petrol rises constantly and the public vehicles are efficient and convenient enough, most people will not drive private cars.On the whole, the elimination of air pollution needs the co-efforts from the government and the public.This problem will be solved only with the help of science and technology.汽车英语作文篇2Too many cars have caused a lot of serious problems in our world.Besides congestion, accidents and fast fuel consumption, cars are responsible for a good part of air pollution in big cities.One possible solution is to design and develop clean cars and clean fuels.In Shanghai, some of the public buses begin to run on natural gas, which does not give off as much carbon dioxide as petrol.Another solution is to develop modern public transportation systems and restrict the use of private cars.If the price of petrol rises constantly and the public vehicles are efficient and convenient enough, most people will not buy private cars.Thus, the total number of cars in big cities will reduce greatly.On the whole, the elimination of air pollution needs the collective efforts from the government, the public and the environmentalists.汽车英语作文篇3Too many cars have created a lot of serious problems in our world. Besides congestion, accidents and fast fuel consumption, cars are responsible for a good part of air pollution in big cities. All the time, they are pumping huge amounts of waste gases into the atmosphere. These gases are very harmful, causing disease and even death. One possible solution is to design and develop clean cars and clean fuels. In Shanghai, some of the public buses begin to run on natural gas, which does not give off as much carbon dioxide as the petrol. But it may take decades for the new models of clean cars completely replace the traditional ones. Another solution is to develop modern public transportation systems and restrict the use of private cars. If the price of petrol rises constantly and the public vehicles are efficient and convenient enough, most people will not buy private cars. And the total number of cars in big cities will reduce greatly. On the whole, the elimination of air pollution needs the collective efforts from the government, the public and the environmentalists.。
关于汽车专题的作文英语
关于汽车专题的作文英语As one of the most significant inventions in human history, automobiles have been playing a crucial role in our daily lives. With the rapid development of technology, automobiles are no longer just a means of transportation. Instead, they have become a symbol of social status and a reflection of personal taste. In this essay, I will discuss some of the most important aspects of automobiles,including their history, environmental impact, and future development.First of all, let's take a look at the history of automobiles. The first automobile was invented in the late 19th century by Karl Benz, a German engineer. The car he invented was powered by a gasoline engine and had three wheels. Since then, automobiles have undergone significant changes and improvements, from the introduction of thefirst four-wheeled car to the development of electric and hybrid vehicles.However, the widespread use of automobiles has also caused some negative impacts on the environment. The emissions from cars contribute to air pollution and global warming, which have become major environmental issues in recent years. To mitigate these problems, many countries have introduced regulations and policies to promote the use of electric and hybrid vehicles, which produce fewer emissions and are more environmentally friendly.In addition to the environmental impact, automobiles have also become a symbol of social status and personal taste. Luxury cars such as Mercedes-Benz, BMW, and Audi are often associated with wealth and success, while sports cars like Ferrari and Lamborghini are seen as symbols of speed and excitement. As a result, many people are willing to spend a significant amount of money on cars to show off their social status and personal taste.Looking into the future, it is clear that automobiles will continue to evolve and improve. The development of autonomous vehicles, which can drive themselves without human intervention, is one of the most exciting prospectsfor the future of automobiles. This technology has the potential to revolutionize the way we travel and could significantly reduce the number of accidents caused by human error.In conclusion, automobiles have become an integral part of our daily lives, and their impact on society and the environment cannot be ignored. While the history of automobiles is fascinating, we must also consider their future development and the potential for new technologies to address the challenges we face today. With the right policies and innovations, we can continue to enjoy the benefits of automobiles while minimizing their negative impacts on the world around us.。
【精选】汽车英语作文三篇
汽车英语作文【精选】汽车英语作文三篇无论是在学校还是在社会中，大家都有写作文的经历，对作文很是熟悉吧，借助作文可以提高我们的语言组织能力。
为了让您在写作文时更加简单方便，下面是小编为大家收集的汽车英语作文3篇，仅供参考，欢迎大家阅读。
汽车英语作文篇1From the graph， we can see that there were two peaks in accidents in 20xx。
One was in March with the number of accidents 35。
The other was in August with the number of accidents 42， which was the highest point on the distribution line。
From August， the number of car accidents decreased till it reached the lowest point of the year in December。
The two peaks occurred in spring and summer， the two seasons which had most of the year’s rain。
Driving tends to be more dangerous on rainy days。
Maybe the weather is the most important reason for car accidents。
Be careful， when you drive a car on rainy days.汽车英语作文篇2Private cars have become an important aspect of people‘s life in many parts of our country, especially in large cities such as Beijing, Shanghai and Guangzhou. While they bring much convenience to people, they are also widely criticized. There are some arguments for owning private cars. In the first place, cars allow people to move around freely, which greatly improves our living standard. We can easily drive cars for sightseeing on weekends. In the second place, cars are a comfortable way to travel, especially in bad weather. Last but not least, the car industry can boost economy by creating many job opportunitiesin production of steel, rubber, glass and so on. However, there are also many good arguments against cars. First of all, they pollute the environment by emitting harmful gases and giving out loud noises. In addition, cars cause a large number of traffic accidents, which bring great misery to the victims‘ families. As far as I am concerned, we should limit the number of private cars by providing better mass transportation and better service for the people. Everyone should sacrifice his or her own interest for the common good of the society.【参考译文】私家车已成为我国许多地区人民生活的一个重要方面，特别是在北京、上海和中国等大城市。
- 1、下载文档前请自行甄别文档内容的完整性，平台不提供额外的编辑、内容补充、找答案等附加服务。
- 2、"仅部分预览"的文档,不可在线预览部分如存在完整性等问题,可反馈申请退款(可完整预览的文档不适用该条件!)。
- 3、如文档侵犯您的权益，请联系客服反馈,我们会尽快为您处理(人工客服工作时间：9:00-18:30)。
北京吉利大学汽车学院汽车发动机的维护与保养目录摘要 (2)关键词 (2)一.发动机基本构造 (2)1.1曲柄连杆机构 (3)1.2配气机构 (3)1.3燃料供给系 (3)1.4冷却系 (3)1.5润滑系 (3)1.6点火系 (4)1.7起动系 (4)二.发动机工作原理 (4)三.关于发动机故障及维护 (5)3.1发动机故障八大主要因素 (5)3.2发动机故障诊断方法 (8)3.3发动机简单维护 (9)四.发动机主要保养方面 (10)4.1车辆保养识常 (10)4.2汽车传感器故障诊断18个要点 (12)五.结束语 (15)六.参考文献 (16)【摘护是大家头痛的问题。
如果平时不知好好保养爱车，或者驾车习惯不好，一旦车子得进厂大修特修，要】汽车的修理和维不单得付出一笔可观的费用，时间的浪费和精神上的折磨，更是难以数计。
所以，汽车要时时注意保养，从你拥有汽车的第一天就小心维护，以免因小失大呢？本文从汽车理论知识出发，为您讲解汽车发动机的维修和保养的基础知识。
【关键词】发动机诊断检修保养【引言】汽车在现在的生活中是不可多得的交通工具，所以对于汽车的保养是要非常值得注意的，一般汽车每行驶5000公里到10000公里或以上都需要去维修店进行不同的保养，所说的汽车保养，主要是从保持汽车良好的技术状态，延长汽车的使用寿命方面进行的工作。
其实它的内容更广，包括汽车美容护理等知识，概括起来讲，主要做好以下三个方面：车体保养、车内保养、车体翻新【正文】一.发动机基本构造发动机是将某一种型式的能量转换为机械能的机器，其作用是将液体或气体燃烧的化学能通过燃烧后转化为热能，再把热能通过膨胀转化为机械能并对外输出动力。
汽车发动机汽油机通常由曲柄连杆、配气两大机构和燃料供给、润滑、冷却、点火、起动五大系统组成。
1．曲柄连杆机构曲柄连杆机构是由气缸体、气缸盖、活塞、连杆、曲轴和飞轮等组成。
这是发动机产生动力，并将活塞的直线往复运动转变为曲轴旋转运动而对外输出动力。
2．配气机构配气机构是由进气门、排气门、气门弹簧、挺杆,凸轮轴和正时齿轮等组成。
其作用是将新鲜气体及时充入气缸，并将燃烧产生的废气及时排出气缸。
3．燃料供给系由于使用的燃料不同，可分为汽油机燃料供给系和柴油机燃料供给系。
汽油燃料供给系又分化油器式和燃油直接喷射式两种，通常所用的化油器式燃料供给系由燃油箱、汽油泵、汽油滤清器、化油器、空气滤清器、进排气歧管和排气消声器等组成，其作用是向气缸内供给已配好的可燃混合气，并控制进入气缸内可燃混合气数量，以调节发动机输出的功率和转速，最后，将燃烧后废气排出气缸。
4．冷却系机动车一般采用水冷却式。
水冷式由水泵、散热器、风扇、节温器和水套（在机体内）等组成，其作用是利用冷却水的循环将高温零件的热量通过散热器散发到大气中，从而维持发动机电动正常工作的温度5．润滑系润滑系由机油泵、滤清器、油道、油底壳等组成。
其作用是将润滑油分送至各个相对运动零件的摩擦面，以减小摩擦力，减缓机件磨损，并清洗、冷却摩擦表面。
6．点火系汽油机点火系由电源（蓄电池和发电机）、点火线圈、分电器和火花塞等组成，其作用是按规定时刻及时点燃气缸内被压缩的可燃混合气。
7．起动系起动系由起动机和起动继电器等组成，用以使静止的发动机起动并转入自行运转状态。
二.发动机工作原理发动机将热能转变为机械能的过程，是经过进气、压缩、作功和排气四个连续的过程来实现的，每进行一次这样的过程就叫一个工作循环。
凡是曲轴旋转两圈，活塞往复四个行程完成一个工作循环的，称为四冲程发动机。
1. 四冲程汽油机的工作原理：(1) 进气行程。
曲轴带动活塞从上止点向下止点运动，此时，进气门开启，排气门关闭。
活塞移动过程中，气缸内容积逐渐增大，形成真空度，于是可燃混合气通过进气门被吸入气缸，直至活塞到达下止点，进气门关闭时结束。
(2) 压缩行程。
进气行程结束时，活塞在曲轴的带动下，从下止点向上止点运动，气缸内容积逐渐减小。
此时进、排气门均关闭，可燃混合气被压缩，至活塞到达上止点时压缩结束。
压缩过程中，气体压力和温度同时升高，并使混合气进一步均匀混合，压缩终了时，气缸内的压力约为0.6MPa～1.2MPa，温度约为600K～800K。
(3) 作功行程。
在压缩行程末，火花塞产生电火花点燃混合气，并迅速燃烧，使气体的温度、压力迅速升高，从而推动活塞从上止点向下止点运动，通过连杆使曲轴旋转作功，至活塞到达下止点时作功结束。
作功开始时气缸内气体压力、温度急剧上升，瞬间压力可达3MPa～5MPa，瞬时温度可达2200K～2800K。
(4) 排气行程。
在作功行程接近终了时，排气门打开，进气门关闭，曲轴通过连杆推动活塞从下止点向上止点运动。
废气在自身剩余压力和在活塞推动下，被排出气缸，至活塞到达上止点时，排气门关闭，排气结束。
因排气系统存在排气阻力，排气冲程终了时，气缸内压力略高于大气压力，约为0.105MPa～0.115MPa，温度约为900K～1200K。
三.关于发动机故障及维护3.1发动机出现故障的八大主要因素每个人都有一颗心脏，如果心脏停止跳动，生命也将随之消逝。
汽车也不例外，发动机就是汽车的心脏，保养的好与坏直接影响着汽车的性能和它的使用寿命。
为了让我们的爱车远离“心脏病”，就要像爱护自己的心脏一样爱护汽车的发动机。
下面所介绍的导致车辆患“心脏病”的八大要因，或许会给让你有所受益。
要因一、不按期保养通常人们总是喜欢在改装上投入很多钱，但却容易忽视按期给发动机做保养。
据有经验的汽修师傅说：“在他们所经手维修的汽车中，车辆因发动机保养不良造成的故障占总故障50%之高。
”可见发动机保养对延长车辆使用寿命能起到至关重要的作用。
当然也会给你减少不必要的损失，要不怎么会有“以养代修”这个名词。
要因二、机油变质及机油滤芯不畅不同等级的润滑油在使用过程中油质都会发生变化。
车辆行驶一定里程之后，性能就会恶化，可能会给发动机带来种种的问题。
为了避免这些故障的发生，应该结合使用条件定期给汽车换油，并使油量适中，一般以机油标尺上下限之间为好。
机油从机油滤芯的细孔通过时，把油中的固体颗粒和黏稠物积存在滤清器中。
如滤清器堵塞，机油则不能顺畅通过滤芯时，会胀破滤芯或打开安全阀，从旁通阀通过，仍把脏物带回润滑部位，促使发动机磨损加快，内部的污染加聚。
因此机油滤芯的定期更换同样重要。
要因三、空气滤芯堵塞发动机的进气系统主要由空气滤芯和进气道两部分组成。
根据不同的使用情况，要定期清洁空气滤芯，可使用的方法有高压空气由里向外吹，把滤芯中的灰尘吹出。
由于空气滤芯为纸质，所以吹的时候要注意空气的压力不能过高，以免损坏滤芯。
空气滤芯在一般在清洗3次后就应更换新的，清洗周期可以由日常驾驶区域的空气质量而定。
要因四、进气管道过脏如果车辆经常行驶于灰尘较多、空气质量较差的路况区域，就应该注意清洗进气管道，保证进气的畅通。
进气管道对于发动机的正常工作非常重要，如果进气管道过脏，会导致充气效率的下降，从而使发动机不能在正常的输出功率范围内运转，加剧发动机的磨损和老化。
要因五、曲轴箱油泥过多发动机在运转过程中，燃烧室内的高压未燃烧气体、酸、水分、硫和氮的氧化物经过活塞环与缸壁之间的间隙进入了曲轴箱中，使其与零件磨损产生的金属粉末混在一起，形成油泥。
少量的油泥可在油中悬浮，当量大时从油中析出，堵塞滤清器和油孔，造成发动机润滑困难，从而加剧发动机的磨损。
此外，机油在高温时氧化会生成漆膜和积炭粘结在活塞上，使发动机油耗增大、功率下降，严重时使活塞环卡死而拉缸。
要因六、燃油系统保养不善燃油系统的保养包括更换汽油滤芯、清洗化油器或燃油喷嘴以及供油管路。
燃油在通过油路供往燃烧室燃烧的过程中，不可避免地会形成胶质和积炭，在油道、化油器、喷油嘴和燃烧室中沉积下来，干扰燃油的流动，破坏正常空燃比，使燃油雾化不良，造成发动机喘抖、爆震、怠速不稳、加速不良等性能问题。
使用燃油系统清洗剂清洗燃油系统，能够始终使发动机保持最佳状态。
要因七、水箱生锈、结垢发动机水箱生锈、结垢是最常见的问题。
锈迹和水垢会限制冷却液在冷却系统中的流动，降低散热的作用，导致发动机过热，甚至造成发动机的损坏。
冷却液氧化还会形成酸性物质，腐蚀水箱中的金属部件，造成水箱破损、渗漏。
定期使用水箱强力高效清洗剂清洗水箱，除去其中的锈迹和水垢，不但能保证发动机正常工作，而且可延长水箱和发动机的整体寿命。
要因八、冷却系统状况不良人们对汽车发动机的养护，尤为重视的是润滑系统，很少重视冷却系统。
殊不知汽车发动机最常见的故障，如活塞拉缸、爆震、缸体冲床内漏、产生的严重噪声、加速动力下降等等，都是由于汽车发动机的工作温度异常，压力过大，冷却系统状况不良而造成。
冷却系统状况不良将直接导致发动机不能在正常的温度下工作，随之而来就会产生上述严重的故障现象。
3.2 发动机故障诊断方法故障诊断定义故障诊断是指在不解体(或仅拆除个别小件)的条件下,确定发动机技术状况,查明故障部位及原因.故障诊断方法诊断故障时应遵循"先易后难、先简后繁、先外后内、分段查找、逐步缩小范围"的原则, 通常采用人工直观法、仪器设备法、故障树分析法对故障予以分析诊断。
人工直观法人工直观法就是通过问、看、嗅、摸、试、听等直接感观,或借助简单工具,以确定机器技术状况和故障的方法。
(1)问即向驾驶员询问查核故障前后的诸如车辆行驶里程、使用年限、维护修理、故障预兆、故障发生过程等有关情况.(2)看即观察有故障疑点的机构、总成和零件的状况,如各仪表指示数值、机体裂痕和变形、消声器排放废气的颜色、滴漏的油迹和水迹,再结合其他有关情况分析、判断发动机的工作情况。
(3)嗅即根据发动机运行中散发出的异常气味判断故障部位,如有生汽油昧,表明有漏油或燃烧不良。
(4)摸即用手触试可能产故障部位的温度、振动情况等,从而判断出诸如配合的松紧度、轴承间隙的大小??零件配重的平衡、柴油管路的脉动以及油、水温度等.(5)试就是通过各种试验方法,使故障现象充分地显现出来,如按喇叭、打开点火开关或灯开关、火花塞"断火"、拉阻风门、使发动机转速迅速升高或降低等,必要时还可换装好的总成或零件进行对比试验.(6)听就是根据发动机在不同工作情况、不同部位发出的声响及声响的规律,判断哪些是正常的,哪些是异常的。
如汽缸内有无爆震声、化油器有无"回火"、排气消声器有无放炮声或 "突、突"声等。
以上方法,并非每一种故障诊断都必须遵循该程序,不同的故障应视其具体情况灵活运用。
3.3发动机的简单维护（1）先检查汽车的防冻液的液面是否合适，正确的液面位置应该在不低于最底线不超过最高线中间偏上是最合适的液面位置！（2）车辆的电瓶汽车的电瓶检查分3小步，第1步先检查电瓶的电解液是否不足（除免维护电瓶）第2步检查电瓶的“正极”和（负极）的庄头是否松动，第3步清除电瓶两极庄头上的氧化物!（3）检查和更换机油，这一步工作先要拔出机油尺检查机油的液面，然后观察机油的颜色，如果要是像麻酱色像水一样没有粘稠度了就必须更换了。