2、The modern automatic transmission is by far the most complicated mechanical component in today’s automobile.
3、Torque that is produced at the end of the crankshaft by the engine must be transmitted to the driving wheels.
4、A double overhead cam engine has two cams per head. So in-line engines have two cams, and V-type engines have four.
5、所以冷却系统的另一个重要作用是让发动机尽快的升温，并保持在稳定的温度范围内。

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三、Answer the following questions in English. (3×5’)
1、Why do we need the cooling system in an IEC （内燃机）?
2、What is the function of the braking system?
3、What ’s the displacement of an engine?
四、 Choose the right answer. (5×2’)
1、What do almost all cars use to convert gasoline into motion? A. one-stroke combustion cycle B. two-stroke combustion cycle C. three-stroke combustion cycle D. four-stroke combustion cycle
2、A car uses a four-stroke engine. The four strokes are . A. intake, compression, ignition and exhaust B. injection, rotation, ignition and exhaust C. injection, carburetion, rotation and exhaust
3、What is the core of a car ’s engine?
A. The cylinder
B. The spark plug
C. Windshield-washer fluid
D.Exhaust
4、What is the heart of the lubrication system, which is located in the oil pan on the bottom of the engine?
A. Screened intake
B. oil filter
C. oil pump
D.oil pressure relief valve
5、What is the cooling agent in the liquid cooling system?
A. Coolant
B. Air
C. Lubrication
D.Gasoline
五、Write a short passage to describe（描述）the blade electric
vehicles within 300 words . (1×25’)
《汽车专业英语》答案
一、1、汽车2、变速器3、废气再循环4、曲轴箱强制通风
5、节温器
6、风扇
7、方向盘
8、双凸轮轴顶置
9、cylinder 10、piston 11、活塞12、冲程13、thermostat 14、gear 15、电流16、散热器17、转向轮18、太阳轮19、曲轴20、传感器
二、1、汽车发动机是内燃机，把燃料的热能转变成驱动汽车行驶的机械能。

2、现代汽车变速器是迄今为止最复杂的部件。

3、由发动机曲轴末端产生的力矩必须要被传递到驱动轮上。

4、双凸轮轴顶置式发动机每个气缸盖有两个凸轮，所以直列式共有2个凸轮，V型有4个凸轮。

5、So another important job is to make the engine warm up as quick as possible and keep it in a constant temperature.
三、1、To keep the engine in a constant temperature.
2、The function of the brake system is to slow down or bring to rest a moving
vehicle in a shortest possible distance, or to hold the vehicle stationary if already halted.
3、Displacement= N*S*πr2
四、1、D 2、A 3、A 4、C 5、A
五、略。