机电类专业英语 教学课件 作者 张延 专业英语(200909总稿).PPTVIP

Unit 35 Fundamentals of Automobile chassis n.底盘 A chassis consists of a framework that supports an inanimate object, analogous to an animals skeleton, for example in a motor vehicle or a firearm. cylinder n.气缸, 柱体 a cylinder barrel with piston rod for pushing and pulling using compressed gases Words and phrases clutch n.离合器 A clutch is a mechanism for transmitting rotation, which can be engaged and disengaged. Clutches are useful in devices that have two rotating shafts. In these devices, one shaft is typically driven by a motor or pulley, and the other shaft drives another device. In a drill, for instance, one shaft is driven by a motor, and the other drives a drill chuck. The clutch connects the two shafts so that they can either be locked together and spin at the same speed (engaged), or be decoupled and spin at different speeds (disengaged). differential n.差速器 As part of a powertrain, the device that allows each of the driving wheels to rotate at different speeds. propeller shaft 传动轴 An automobile may use a longitudinal shaft to deliver power from an engine/transmission to the other end of the vehicle before it goes to the wheels. A pair of short drive shafts is commonly used to send power from a central differential, transmission, or transaxle to the wheels. alternator n.交流发电机 Alternators are used in modern automobiles to charge the battery and to power a cars electric system when its engine is running. Alternators have the great advantage over direct-current generators of not using a commutator, which makes them simpler, lighter, less costly, and more rugged than a DC generator. The stronger construction of automotive alternators allows them to use a smaller pulley so as to turn faster than the engine, improving output when the engine is idling. Unit 36 Internal Combustion Engine Words and phrases piston n.活塞 A piston is a component of reciprocating engines, pumps and gas compressors. It is located in a cylinder and is made gas-tig