中职汽车专业英语 2.2 How Engine Works

task 10
The whole working processes of the engine’s cylinder

..\..\Lesson piece\the car machine work principle.swf
Task 11: summry
了解车是怎样运动的。 了解发动机的工作原理 。 了解汽车汽缸的四行程是怎样工的 ？
The Vehicle Professional English
Chapter Two 2.2 How Engine Works
Task 1 Warm up
To enjoy these pictures(before enjoy
to think about how vehicle to move)
活塞上升到达汽缸顶部时，推出所有的废气， 排气阀关闭准备下一个四行程循环。
Translate the following expressions into English
Task 8

进气行程 压缩比 火花塞 发动机点火行程 发动机做工行程 排气系统
intake the compression ratio the spark plug engine firing order engine power stroke exhaust system
The four strokes are Intake, Compression,Power and Exhaust.
Task 5
Reading
The piston travels down on the Intake stroke,up on the Compression stroke.down on the Power stroke and up on the Exhaust stroke.
曲轴转两周，发动机的每个汽缸都完成一个 做工行程
Task 7
Translate the following sentences tnto Chinese
4、the piston travels up to the top of the cylinder pushing all the exhaust out before closing the exhaust valve in preparation for starting the four stroke process over again.
exhaust
engine firing
piston
intake
crankshaft
Task 3 lead in
Get students to share the information which got on line before class
Task 4
review the words

That is: Intake--down, Compression—up, Power—down, Exhast--up
3、How do the four-strokes works of the engine’s?
Task 6 Reading Comprehension • How is the furl-air mixture drawn into the cylinder?


排气 exhaust 行程 stroke 进气行程 Intake plunger / piston 活塞 曲轴 crankshaft 发动机点火顺序 Engine firing order the ratio of …的比例 the exhaust valve 排气阀 the four stroke process 四行程循环
Task 7
Translate the following sentences tnto Chinese
1、When the piston reaches the bottom of the intake stroke,the intake valve close,trapping the airfuel mixture in the cylinder.
当活塞到达进气行程的底部，随着空气燃油 混合气进入汽缸，进气阀门关闭。
Task 7
Translate the following sentences into Chinese
2、The combustion process pushes pistion down the cylinder with great force turning the crankshaft to provide the power to propel the vehicle
Homework
To finish the exercises on page 18 I、 II 、 III
Task 5
Reading
1、How can vehicles move? 2、What are the four –strokes of the cylinder?
3、How does the four-strokes works of the engine’s?
Task 5
Reading
1、How can vehicles move?
It can move is that according to the exercise of engine to arouse car wheel to turn to move to make the car exercise.
Task 5
Reading
2、What are the four –stroke of the cylinder?
As the piston starts down on the Intake stroke, the intake valve opens and the frel-air mixture is drawn into the cylinder.
• How to cosider the piston travle a fourstrokes process?
The piston travels up to the top of the cylinder pushing all the exhaust out before closing the exhaust valve in prepartion for starting the Four-stroke process over again
在燃烧过程中产生的巨大力量推动者活塞向下 运动，待定曲轴而产生推送汽车的动力。
Task 7
TranslatHale Waihona Puke Baidu the following sentences tnto Chinese
3、By the time the crankshaft completes two revolutions, each cylinder in the engine will have gone through one power stroke.
Task 2: watch
The working process of cylinder four - stroke
Task 8
in-line engine
Task 2: watch Task 4: 观看
The work process of cylinder four - stroke
flat engine
Task 1 Warm up
To enjoy these pictures
Task 1 Warm up
To enjoy these pictures
Task 1 Warm up
To enjoy these pictures
Task 1 Warm up
To enjoy these pictures