中英文文献翻译—发动机塑料进气歧管的应用与发展趋势

附录

Engine plastic intake manifold application and

development trend

Because plastic products unique advantages, plastic intake manifold will become aluminium alloy intake manifold alternative products.

Since always, as the key components, domestic engine intake manifold are using aluminum alloy products. And according to understand, foreign plastic intake manifold application in a wide range, such as BMW, modern, nissan, which upscale automobile use plastic intake manifold.

According to the auto air-intake system manufacturing company a technology expert introduction, compared with traditional aluminum alloy intake manifold, plastic intake manifold weighs just for aluminum manifold 1/2, its at low speed, low load power, torque increase was can reach above 10%. Meanwhile, the airway smooth plastic intake maifold, improve the engine performance, compared with aluminium alloy manifold fuel can reduce 6% to 8%, in addition, still can improve engine performance and emission function, reduce engine noise, and with the aluminum alloy intake manifold interchangeability strong.

Domestic to automotive plastics intake manifold research startting evening, plastic intake manifold manufacturing and r&d technology is still in the blank, in this field technical level is low, its market share is less than 2%. Some of the country's auto manufacturers have to import from abroad plastic intake manifold high. "A technology expert says.

Changan group technology development center of a personage thinks, along with the market competition, reduce automobile manufacturing costs into the central focus of automobile enterprise, new materials, new technology products are more valued and cheap plastic intake manifold replace traditional heavy metal intake manifold become an inevitable trend. Meanwhile, plastic intake manifold demand, will accompany the increases production

car increases, its market prospect synchronization is nottaken lightly.

In recent years, functional plastic application in automobile engine has made breakthrough progress, more and more engine components to begin using a plastic material production, especially with plastic intake manifold replace metal intake manifold has become an inevitable trend of automobile engine.

With the traditional metal intake manifold, plastic intake manifold compared with what strengths?

Metal intake manifold generally USES is cast iron or alloy material. In order to satisfy the engine intake and efi system installation requirements, and in manufacturing complex metal intake manifold often faced manufacturing difficulties, its yield is very difficult to guarantee.

In 1990, the German BMW company USES molten core method successfully produce plastic intake manifold.

Later, plastic intake manifold with its light weight, low cost, performance is good wait for a characteristic quickly replaced the gold

Belong to intake manifold, become the new engine of choice. In European and American countries, about 90% of the exhaust from the opposite side of naturally aspirated engines use plastic intake manifold. Specifically, the plastic intake manifold main With four advantages:

(1) in weight, because plastic intake manifold generally USES the nylon PA66 material, the proportion is about 50% of aluminum alloy material.

(2) in addition, the thickness of the plastic intake manifold for 2.5 ~ 3mm commonly, and aluminum alloy intake manifold wall thickness generally greater than 4mm. Therefore, plastic intake manifold weight relative to light many, usually only for aluminum alloy around 40% of the intake manifold.

(3) in power, because plastic intake manifold wall smoother, therefore to improve air filling quantity. Compared with aluminium alloy the intake manifold, engine performance can improve the 3% ~ 5%.

(4) in the economic aspect, plastic intake manifold brings good airflow, thus helping to gasoline engine cylinder in full within the engine burn, the fuel consumption and emissions could have been improved obviously.