新编汽车专业英语第3版黄汽驰电子课件Unit7PassageB.pptxVIP

Unit Seven　 Car Body and Electrical System　;Passage BElectrical System;The power supply system The power supply system contains battery and alternator． The battery is a component that is responsible for storing the electricity that will be used to start the engine and operate all of electrical accessories within the car． So it is considered as the heart of automotive electrical system． The alternator keeps the battery charged and the electrical system going while the car is in operation．;The power consumer system The power consumer system means that some automotive systems and equipment have to use electricity to operate, including starting system, ignition system, lighting system, electronic control system and instrument cluster control system, etc． The starting system contains a start motor which uses the electricity to start the engine．;The ignition system is a part of gasoline engine． In the ignition system, electric current from the battery is used to make the coil create high voltage which causes the spark plug to produce spark, igniting the fuel-air mixture in the cylinders． The lighting system mainly contains illuminating lamps and signal lamps． For example: The head lamps ensure the safety in night driving．;The daytime running lamps (DRL) are designed to be more easily recognized for safety in daytime driving． They are located in the front of a car and automatically turn on when the engine is started． The turn lamps are used to indicate the car will be going to turn a corner． The braking lamps as tail lamps are used to alarm the car behind that this car is slowing down or will stop．;The electronic control system mainly contains electronic ignition control, electronic fuel injection control, ABS controls, etc., which respectively improve car’s performance , fuel economy, safety, emission purification and maneuverability． The instrument cluster control system contains all gauges and warning lamps on the dashboard．;The gauges include as follows: 1.Tach