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1、UNIT SIX ELECTRIC SYSTEM,UNIT SIX ELECTRIC SYSTEM,TEXT A What Is Battery TEXT B Instrument Panels TEXT C Air Bag TEXT D Lighting System,了解与汽车电器的专业术语、专业 词汇和缩略语,掌握汽车电器英语的习惯表达方法,学习目标,UNIT FIVE BRAKING,会看汽车电器的有关英文资料,能借助字典翻译汽车电气方面的 文章,能力目标,UNIT FIVE BRAKING,TEXT A What Is Battery,TEXT A What Is Battery,电
2、池是汽车上的重要部件之一，发动机的起动以及停车后车上所有的用电设备全靠它来供电，因此，它的性能对汽车性能有着至关重要的影响。,A battery(Fig.6.1)is an electrochemical device.Car batteries are of the 12V type. The battery supplies current to initially energize the magnetic field of the alternator1.During charging,the battery changes electrical energy from the alt
3、ernator into chemical energy to maintain its state of charge2. It also provides electricity when the load is too heavy for the alternator to handle alone.,TEXT A What Is Battery,TEXT A What Is Battery,The battery also acts as a“shock absorber”to stabilize alternator voltage output3.The battery is us
4、ed to supply current for starting the car.Up-on starting;the generator will recharge the battery. The battery contains positive and negative plates that are connected in such a way as to produce three or six groups or cells.The plates are covered with electrolyte.,TEXT A What Is Battery,A charged ba
5、ttery will amass(gather a great quantity)a surplus of electrons at the negative post.When the battery is placed in a completed circuit,the electrons will flow from the negative post,through the circuit,and on to the positive post. The battery must be kept charged by passing electricity through it in
6、 a reverse direction to that of battery current flow.4,TEXT A What Is Battery,1alternator：电机是实现电能和机械能互相转换的旋转装置。 2changesfrominto:“将转化为”。 3acts as:“起到的作用”。 4in a reverse direction to:意为“与相反”。,TEXT A What Is Battery,词汇学习,TEXT A What Is Battery,词汇学习,TEXT A What Is Battery,参考译文,什么是蓄电池 蓄电池 (图6.1) 是一种电化学设
7、备。 汽车用蓄电池的电压为12V。 蓄电池为交流电动机最初的励磁提供电能。在充电时，蓄电池将发机输出的电能转化为化学能存储在蓄电池中。当过载时，蓄电池与发电机共同为车辆提供电能。蓄电池还起到“减震器”（吸收过载电压）的作用，使发电机的输出电压稳定。蓄电池通常为汽车起动提供电能，在起动后发电机再为蓄电池充电。,TEXT A What Is Battery,参考译文,蓄电池由36组（单元）连接在一起的正极板与负极板组成，这些极板浸在电解液中。 蓄电池的负极会积聚剩余的电子。当蓄电池接入电路后，电流从负极经过电路流向正极。 蓄电池充电时电流方向必须与其放电时相反。,TEXT A What Is Ba
8、ttery,知识拓展,TEXT A What Is Battery,思考练习,翻译下列词组： 1、车用蓄电池 2、减震器,TEXT A What Is Battery,TEXT B Instrument Panels,TEXT B Instrument Panels,汽车仪表板集中了全车的仪表，它好像一扇窗口，显示了汽车的工作状况。仪表板中最显眼的是车速里程表，它表示汽车的时速，单位是km/h(公里小时)。车速里程表实际上由两个表组成，一个是车速表，另一个是里程表。,On the instrument panels are several instruments which tell what
9、s going on under the hood1.(Fig.6.2) The gas gauge tells how much gasoline is in the tank.The oil gauge tells if the engine is getting enough oil.(A thin film of oil has to keep flowing around all the moving parts of the engine to keep them working smoothly and safely2),TEXT B Instrument Panels,TEXT
10、 B Instrument Panels,The ammeter tells if the generator is sending new electricity into the battery.This should be happening most of the time when the engine is running. The temperature gauge tells if the engine is being cooled enough3.If there is not enough water in the radiator,or if the fan isnt
11、blowing enough air back across the pipes,the engine gets too hot.,TEXT B Instrument Panels,The speedometer tells how fast the car is moving.It does this by measuring how fast the wheels are turning. 1“under the hood”：“引擎罩下”就是指“发动机”。 2本句中的代词“them”就是前面的“运动部件”。 3这句直接翻译是“发动机是否被冷却足够”,根据含义可以改成“发动机的冷却是否足够”
12、。,TEXT B Instrument Panels,词汇学习,TEXT B Instrument Panels,词汇学习,TEXT B Instrument Panels,参考译文,仪表板 在仪表板上， 我们能看到几个显示发动机运转情况的仪表。(图6.2) 燃油表告诉我们在油箱里有多少汽油。机油表告诉我们发动机是否得到足够的润滑。(在发动机的全部运动部件之间必须有一层薄薄的机油膜，这样才能使运动部件运行既平稳又安全)。 安培计告诉我们发电机是否向蓄电池充电。在发动机运转时大部分时间应该是充电。,TEXT B Instrument Panels,参考译文,温度计量器告诉我们发动机的冷却是否足够
13、。如果在散热器里没有足够的水，或者风扇吹过管道的风量不够，发动机会过热。 里程表告诉我们汽车的行驶有多快。它通过测量车轮转动速度而得出。,TEXT B Instrument Panels,知识拓展,TEXT B Instrument Panels,汽车电系：automotive electric system起动机：starting motor 利用齿轮传动来摇动引擎或起动引擎的电动马达。 电磁开关：solenoid switch 借着电磁线圈芯的移动而使开关合的一种小开关装置。其芯也会导致机械作用，如将传动小齿轮与飞轮的齿轮啮合，以起动引擎。,知识拓展,TEXT B Instrument P
14、anels,卤素头灯：halogen headlamp 一种灯泡内充满卤素的聚光大灯，其光度较一般灯亮。汽油表：fuel level indicator 分为装在驾驶室仪表板的表体及装在油箱上的量油器两部分。 机油压力表：oil pressure gauge 通称为机油表，指示引擎内部机油压力的大小。至于油底壳中的机油量，需要引擎旁的机油尺测量。现今多数汽车以警告灯代替机油压力表。,思考练习,翻译下列词组： 1、燃油表 2、安培计 3、温度计量器 4、里程表,TEXT A What Is Battery,TEXT C Air Bag,安全带自发明之后已经发挥了很重要的保护作用，但在强烈的碰撞发
15、生时，前座驾乘者的头部和胸部还是很容易受到伤害，于是安全气囊便诞生了。,TEXT C Air Bag,Air bags supplement the protection provided by safety belts by protecting the head and chest in moderate to severe front-end collisions.If a vehicle collides with a solid object,the occupants1are thrown forward against the dashboard,windshield,and p
16、rotruding objects,particularly the steering wheel.In the event of a moderate to severe front-end collision,tough nylon bags,similar to large balloons,inflate in a fraction of a,TEXT C Air Bag,second so that the driver and passenger are cushioned as they are thrown forward2.As a result,the air bag absorbs the energy of the forward motion of the occupants with little or no injury to them3. Fig.6.3 illustrates typical driver sid
