（中职）汽车维修专业英语Chapter two教学课件

1、YCF正版可修改PPT（中职）汽车维修专业英语Chapter two教学课件 Automobiles Key ComponentsChapter Two1.bumper 2.name plate3.headlight4.front wing5.air filter6.engine7.rear view mirror8.windscreen 9.body10.seat belt11.steering wheel12.shock absorber13.trunk14.spare tire 15.tailpipe16.tire17.rim18.rear suspension19.driver sea

2、t20.silencer21.disc brake22.drive shaftUnit FourA Section View of a Typical Car1.hood2.trunk3.bumper4.door5.exhaust pipe6.headlight7.hubcap8.indicator light9.number plate10.rear light11.rear window12.registration number13.roof14.roof rack15.side light16.tire17.windscreen18.windscreen wiper19.wing20.

3、wing mirrorKnow More汽车的总体构造通常包括四个部分:发动机、底盘、车身和电气设备。发动机是汽车的动力装置,其作用是将燃料的化学能转化为热能,再把热能转化为机械能,从发动机的曲轴向外输出功率。底盘是汽车的基础,接收发动机产生的动力,使汽车得以行驶。底盘由传动系、行驶系、转向系和制动系四大系统组成。车身用以承载驾驶员、旅客或装载货物。货车的车身包括驾驶室和货厢两个部分,客车和轿车一般采用整体车身。电气设备由电源(蓄电池、发电机)、发动机的起动系和点火系,以及照明、仪表等组成。(I) OverviewUnit FiveEngine1.cylinder head 2.piston3

4、.spark plug 4.intake valve5.exhaust valve6.lifter (tappet)7.camshaft timing gear8.crankshaft pulley9.crankshaft timing gear10.camshaft11.crankshaft12.oil pan13.flywheel14.connecting rod15.cylinder block() Cylinder BlockUnit FiveEngine1.cylinder head gasket2.cylinder head3.cylinder liner4.cylinder bl

5、ock5.cylinder6.valve seat7.water cooling ake and exhaust valves9.valve chamber()Piston and Connecting-rodUnit FiveEngine1.,pression ring3.oil rings4.piston5.piston pin6.piston pin ring7.connecting-rod bushing8.connecting-rod9.connecting-rod bolt10.connecting-rod nut11.,12.crank baring half

6、shells13.connecting-rod cap() Mixture Distribution MechanismUnit FiveEngine1.exhaust VVT-i controller2.chain damper3.exhaust ake camshaft5.timing chain6.hydraulic lash ake valve8.exhaust ake VVT-i controller valve chamber10.timing rotor11.chain slipper12.chain ten

7、sioner13.valve14.valve spring seat15.valve stem seal16.valve spring17.spring retainer18.keeper19.end cap()Cooling SystemUnit FiveEngine1.upper tank2.radiator3.air flow4.fan5.lower tank6.lower radiator hose7.water pump8.cylinder head water jackets9.thermostat10.pressure cap() Lubrication SystemUnit F

8、iveEngine1.oil filter2.main galleries3.pick-up screen4.oil pan 5.oil pump()Diesel EngineUnit FiveEngine1.injector2.filter 3.oil return pipe4.fuel feed pipe5.diesel oil tank6.fuel injection pump7.high-pressure pipe8.fuel feed pumpKnow More汽油发动机通常由曲柄连杆机构和配气机构两大机构,以及燃料供给系、润滑系、冷却系、点火系、起动系五大系统组成。柴油发动机通常由

9、两大机构和四大系统组成(无点火系)。 曲柄连杆机构由缸体、缸盖、活塞、连杆、曲轴和飞轮等组成。配气机构由进气门、排气门、气门弹簧、挺杆、凸轮轴和正时齿轮等组成,将新鲜气体及时充入气缸,并将燃烧产生的废气及时排出气缸。汽油燃料供给系多采用电子控制汽油喷射系统,代替传统的化油器供给装置,喷油器将汽油直接喷入进气管与空气混合后进入各缸燃烧室。润滑系由机油泵、滤清器、油道、油底壳等组成,将润滑油分别送至各个相对运动零件的摩擦面,以减小摩擦力,减缓机件磨损,并清洗、冷却摩擦表面。 发动机一般采用水冷却方式,由水泵、散热器、风扇、节温器和水套等组成,利用冷却水的循环将高温零件的热量通过散热器散发到大气中,

10、从而维持发动机正常的工作温度。 汽油发动机点火系由电源(蓄电池和发电机)、点火线圈、分电器和火花塞等组成,在规定时刻点燃气缸内被压缩的可燃混合气。 起动系由起动机和起动继电器等组成,用以使静止的发动机起动并转入自行运转的状态。() OverviewUnit Six Chassis 1.injector2.filter 3.oil return pipe4.fuel feed pipe5.diesel oil tank6.fuel injection pump7.high-pressure pipe8.fuel feed pump() OverviewUnit Six Chassis 1.dif

11、ferential2.rear axle housing3.frame4.steering wheel5.engine6.transmission7.drive shaft8.suspension() Layout (Sedan)Unit Six Chassis 1.engine2.clutch3.gearbox4.half shaft5.final gear6.differential7.U-joint()ClutchUnit Six Chassis 1.pressure plate2.clutch facing3.clutch disk4.crankshaft5.flywheel6.bol

12、t7.pressure spring8.clutch cover9.release sleeve10.driven shaft11.clutch pedal()Rear AxleUnit Six Chassis 1.rear axle housing2.final gear3.differential4.half shaft5.hub()Spring TypesUnit Six Chassis 1.coil spring2.air spring3.torsion bar4.leaf spring()Steering SystemUnit Six Chassis 1.steering wheel

13、2.steering shaft3.steering gear4.pitman arm5.drag link6.steering arm7.tie-rod()Hydraulic Braking SystemUnit Six Chassis 1.brake pedal2.master cylinder3.brake line 4.wheel cylinder5.brake drum 6.brake lining7.brake shoe8.brake shoe return spring9.wheel cylinder piston10.master cylinder piston11.push

14、rod()Air Braking SystemUnit Six Chassis 1.brake pedal 2.air compressor3.air brake reservoir 4.air gauge5.brake chamber 6.brake shoe7.brake cam 8.brake valveKnow More汽车底盘由传动系、行驶系、转向系和制动系四个系统组成。传动系由离合器、变速器、万向传动装置和驱动桥等组成,其作用是把发动机的动力传给驱动车轮。行驶系由车架、车桥、车轮、悬架等组成,其作用是把汽车各总成、部件连接成一个整体,支承全车,缓冲减震,保证汽车正常行驶。转向系由方

15、向盘、转向器和转向传动装置等组成,其作用是使汽车按驾驶员所规定的方向行驶。制动系由制动器和制动传动装置、ABS等组成,其作用是迅速降低汽车行驶速度直至停车。Answer the following questions.回答下列问题。What do the cars electrical equipments include? 汽车的电气设备包括哪些?Battery system,由battery、硅整流dynamo和voltage调节器组成,其作用是向全车用电设备提供低压电源。Start system,由start motor及relay组成,其作用是起动engine。Ignition sys

16、tem,主要有coil、distributor总成、spark plug等,其作用是将低压电变成高压电,产生电火花,点燃气缸中的可燃混合气体。Lighting system包括车外和车内照明设备,其作用是确保车辆内外一定范围内有合适的照明。Signal system包括音响信号和灯光信号两类,其作用是引起行人、车辆注意,确保行驶和停车的安全性、可靠性。Cluster system指各种仪表,其作用是显示engine、brake等系统的工作状态,增加汽车运行参数监控。Amusement system主要包括暖风器、A/C、音响视听设备等装置,其作用是为驾驶员和乘客提供良好的工作条件和舒适安乐的乘

17、坐环境。Computer control system包括发动机变速器EEC、车辆行驶中心VEC、驾驶员信息中心DIC三大类。目前已进入实用阶段的电子控制装置有: EFI、电子控制式自动变速器EAT、ABS等,各式各类传感器得以广泛应用。Unit Seven Electrical Equipments 汽车电气设备相同的地方:1.蓄电池和发电机。蓄电池主要供起动用电,发电机主要是在汽车正常行驶时向用电器供电,同时向蓄电池充电。2.低压直流。汽车用的电压有6V、12V、24V三种,以12V和24V较多。由于蓄电池充、放电的电流为直流电,所以汽车用电均是直流电。3.并联单线。汽车用的设备很多,但都

18、是并联的。4.负极搭铁,连接在车身。()Lights and Signals1.indicator light2.rear light3.stop light 4.number plate light5.horn bottom6.windscreen wipers7.earth to chassis8.coil9.Battery10.spark plugs11.distributor12.engine13.indicator light14.side light15.head light16.dynamo17.horn18.starter motor19.fuse box ()Instrume

19、nt Panel1.passengersdoor check2.instrument cluster3.side vent4.head light and turn signal switch5.passengersdoor control switch6.fuel filler soon opener7.throttle knob8.parking brake lever9.AT selector lever or MT gear shift lever10.windshield washer fluid tank11.outside rear view mirror12.inside re

20、ar view mirror13.clock()Instrument Panel1.rear interior light switch2.front interior light switch3.rear heater controls4.rear window wiper and washer switch5.outside rear view mirror6.windshield wiper and washer switch and exhaust retarder switch7.ignition switch8.rear window defogger switch9.cigare

21、tte lighter10.ash tray11.microphone amplifier12.cassette tape player13.radio14.side vent15.side defroster outlet16.center vent17.cooler control18.heater controls19.emergency flasher switch()Instrument Panel1.fuel gauge with low fuel warning lamp2.turn signal indicators3.speedometer4.warning and indicator lamp for alternator, high beam and engine oil pressure5.tachometer, energy control6.coolant temperature gauge7.warning and indicator lamps