汽车专业英语宋进桂PPT课件

1、Chapter 6 Automotive Electrical and Electronic Systems 6.1 Lead Acid Battery and Circuit protection devices New Wordselectrochemicalilektrukemikl a.电化（学）的电化（学）的overloaduvludn.超载，过载，过负荷超载，过载，过负荷fusiblefju:zbla.易熔的，可熔化的易熔的，可熔化的relayrilein.继电器继电器bimetallicbaimitlika.双金属的双金属的stripstripn.条，带条，带remainderr

2、imeindn.剩余物，其余的人；剩余物，其余的人；a.剩余的剩余的exceediksi:dv.超过，胜过超过，胜过第1页/共15页Chapter 6 Automotive Electrical and Electronic Systems 6.1 Lead Acid Battery and Circuit protection devices A lead-acid storage battery (Figure 6-1) is an electrochemical device that produces voltage and delivers electrical current. T

3、he battery is the primary source of electrical energy used in vehicles today. When charging, the battery converts electricity into chemical energy, and when discharging, it converts chemical energy into electricity, producing a current.It is necessary to protect electrical circuit against shorting (

4、accidentally touching ground) that could burn up the wiring. Electrical units must be protected against overloads also. In circuits, Circuit protection devices must be installed in series with the electrical devices or wiring to be protected. The common types of circuit protection devices are fuse,

5、fusible link and circuit breaker, see Table 6-1.第2页/共15页Chapter 6 Automotive Electrical and Electronic Systems 6.1 Lead Acid Battery and Circuit protection devices All of the vehicle fuses are usually contained in a holder called fuse block or relay block (Figure 6-2 and 6-3).A circuit may be protec

6、ted by a special wire that acts as a fuse. This wire is called a fusible link. A Circuit breaker feeds current through a bimetallic strip and a set of points to the remainder of the circuit. When the current exceeds the breakers rating, the bimetallic strip heats and bends to separate the points. On

7、ce it cools, it will close the circuit. Relays are used to direct large current flows that might overheat and damage a switch, they are a type of solenoid switch that closes electrical contacts. Most of relays are usually contained in relay block and junction block (J/B).第3页/共15页 Figure 6-1 Battery

8、construction第4页/共15页Chapter 6 Automotive Electrical and Electronic Systems 6.1 Lead Acid Battery and Circuit protection devices Table 6-1 Circuit protection devices used for Toyota automotive wiring diaghramsIllustration Symbol Name AbbraviationFuseFuseMedium current fuseM-FuseHigh current fuseH-Fus

9、eFusible linkFLCircuit breakerCB第5页/共15页Chapter 6 Automotive Electrical and Electronic Systems 6.1 Lead Acid Battery and Circuit protection devices Figure 6-2 Location of use block, relay block and junction block in a passenger car第6页/共15页Chapter 6 Automotive Electrical and Electronic Systems 6.1 Le

10、ad Acid Battery and Circuit protection devices Figure 6-3 Location of use block, relay block and junction block in a van第7页/共15页Chapter 6 Automotive Electrical and Electronic Systems 6.2 Charging System rotationruteinn.旋转旋转alternator:ltneitn.（交流）发电机（交流）发电机regulatorregjuleitn.调节器，调节阀调节器，调节阀rectifierr

11、ektifain.整流器整流器explodeikspludv.爆炸，爆破爆炸，爆破New WordsThe charging system uses the rotation of the engine to create electricity. The electricity recharges the battery and provides power to operate the various vehicle electrical systems. The modern vehicle charging system consists of alternator and volta

12、ge regulator (Figure 6-4 and 6-5).第8页/共15页Chapter 6 Automotive Electrical and Electronic Systems 6.2 Charging System Figure 6-4 Components of a typical AC generator第9页/共15页Chapter 6 Automotive Electrical and Electronic Systems 6.2 Charging System Figure 6-5 Exploded view of a typical alternator (wit

13、h voltage regulator)第10页/共15页Chapter 6 Automotive Electrical and Electronic Systems 6.3 Starting System armature:mtju n.转子，电枢转子，电枢energizeendaiz v.供给供给.能量，激励，励磁，通电能量，激励，励磁，通电chromekrumn.铬铬 Modern internal combustion engines are started by using electric starting motor, or starter (Figure 6-6, 6-7 an

14、d 6-8). A starting system consists of battery, ignition switch, starter relay and starter. To energize the starter, the ignition switch is turned to START, which completes an electrical circuit. When the starter begins to turn the starter gear moves out and engages the ring gear, which spins the crankshaft. New Words第11页/共15页Chapter 6 Automotive Electrical and Electronic Systems 6.3 Starting System Figure 6-6 Starting motor comp