汽车专业英语发动机课件

1、Unit 2-1Main Components of Engine Unit 2-1Main Components of En2一、发动机的分类Clissified by fuel（按燃料不同分类）汽油机和柴油机；Clissfiled by working progress（按工作行程分类）四冲程发动机和二冲程发动机；Clissfiled by cooled ways（按冷却方式分类）水冷发动机和风冷发动机；Clissfiled by number of cylinder（按气缸数量分类）单缸发动机和多缸发动机2一、发动机的分类Clissified by fuel（按燃3Clissified

2、by fuel（按燃料不同分类）汽油发动机gasoline enginegasolinegslin n. 汽油 点燃方式（点燃式）3Clissified by fuel（按燃料不同分类）汽油4柴油发动机diesel enginedieseldi:zl n. 柴油 ，柴油机点燃方式（压燃式）4柴油发动机点燃方式5Clissfiled by working progress（按工作行程分类）二冲程发动机Two stroke enginestrokestrk n. 冲程，行程；活塞反复运动一次，曲轴转动一周，两个冲程完成一个工作循环。5Clissfiled by working progres6四冲

3、程发动机Four stroke enginestrokestrk n. 冲程，行程；活塞反复运动两次，曲轴转动两周，四个冲程完成一个工作循环。6四冲程发动机活塞反复运动两次，曲轴转动两周，四个冲程完成一7水冷却式发动机Water coolest engine水箱，通过水泵作用，水通过水道流通整个汽缸体，进行降温。7水冷却式发动机水箱，通过水泵作用，水通过水道流通整个汽缸体8风冷却式发动机air coolest engine风冷，通过空气气流与风扇作用，空气/风通过发动机整个汽缸体，进行降温。8风冷却式发动机风冷，通过空气气流与风扇作用，空气/风通过发9Clissfiled by number

4、of cylinder（按气缸数量分类）单缸发动机Single cylinder enginecylinder slnd n. 气缸我只有一个气缸，一组气门；9Clissfiled by number of cylin10多缸发动机Multi cylinder enginecylinder slnd n. 气缸我有多个气缸，多组气门；10多缸发动机我有多个气缸，多组气门；11二、发动机的基本组成11二、发动机的基本组成12汽油机包含几大系统？冷却系 cooling system润滑系 lubrication system lu:brken 润滑，加油; 油润;起动系 starting syst

5、em点火系 Ignition system gnn12汽油机包含几大系统？冷却系 cooling s燃油供给系 fuel supply system进气系统 intake system排气系统 exhaust system gz:st13燃油供给系 fuel supply system114Cooling system (冷却系统)Starting system (起动系统)14Cooling system (冷却系统)Sta15Lubrication system (润滑系统)Ignition system (点火系统)15Lubrication system Ignit16Fuel sup

6、ply system (燃油供给系统)intake system (进气系统)16Fuel supply system intak17例句分析：Engine system includes ：_、_、_、_. 中文：include vt.包括，包含； 译文：发动机系统包括：_、 _、_、 _。 ignition systemstarting systemlubrication systemcooling system点火系统起动系统润滑系统冷却系统17例句分析：Engine system includes 18汽油机包括哪两大机构？Crank-connecting rod mechanism曲

7、 柄连杆机构18汽油机包括哪两大机构？Crank-connecting 19配气机构Valve mechanism气 门机 构19配气机构Valve mechanism气 门机 构20Intake 进气 Compression压缩Exhaust排放Power做功Stroke . /struk / n. 打击；中风；笔画；冲程；尝试；轻抚 三、发动机的四大工作行程20Intake CompressionExhaustPow21四、发动机的布置形式发动机前置前轮驱动发动机前置后轮驱动发动机后置后轮驱动21四、发动机的布置形式发动机前置发动机前置发动机后置22课堂小结需要记住的单词：发动机底盘车身电

8、器系统汽油柴油冲程EngineChassisBodyElectrical systemGasolineDieselstroke22课堂小结需要记住的单词：Engine23单独的，独立的气缸曲柄连杆机构配气机构SinglecylinderCrank-connecting rod mechanismkrkn.机曲柄;妙语，奇想rd n.杆，拉杆;惩罚，体罚;（责打人用的）棍棒;手枪; meknzm机制Valve mechanism英 vlv 美 vlv n阀; 真空管; （管乐器的）活栓; （心脏的）瓣膜;23单独的，独立的Single排气系统 Exhaust system润滑系统 Lubrica

9、tion system 点火系统 Ignition system启动系统 Starting system冷却系统 Cooling system进气系统 Intake system24排气系统 Exhaus25需要记住的句子There are four basic components of the automobile : engine , chassis , body and electrical system .译：汽车有四个基本组成部分，发动机， 底盘，车身和电气系统。Engine system includes ： ignition system，lubrication system,

10、 cooling system, starting system.译：发动机系统包括：点火系，润滑系，冷却系，起动系。25需要记住的句子There are four bas26布置任务将需要记住的单词和句子记录在笔记本上；将需要记住的单词每个写3遍，1遍汉语意思；26布置任务将需要记住的单词和句子记录在笔记本上；Pre-questionsThe heart of automobilePre-questionsThe heart of What impression of the engine?complicated powerPre-questionsWhat impression of th

11、e engine?What are there types of the engine?electric motors, steam engines, and internal combustion engines Whats the internal combustion engine? burns fuel within the cylinders and converts the expanding force of the combustion into rotary force used to propel the vehicle.Pre-questionsWhat are ther

12、e types of the enSingle-cylinder enginecylinderpistonPiston pinConnecting rodcrankshaftOil pipeIntake valveExhaust valve Timing gearOil pumpSingle-cylinder enginecylinderwhat is the power source of automobile and how to produce?piston piston pin connecting rod crankshaft EnginePower is produced by t

13、he linear motion of a piston in a cylinder. The connecting rod transmits the up-and-down motion of the piston to the crankshaft, which changes it into rotary motion. Pre-questionswhat is the power source of aThe engine comprises two mechanism and five systems, what are they ?crankshaft and connectin

14、g rod mechanism, valve gear, cooling system, lubricating system, fuel system, starting system, ignition system Pre-questionsThe engine comprises two mechaconnecting rodflywheelcrankshaftpistonintake valveexhaust valvepush rodtappettiming gears Valve gear Connecting rod connecting rodflywheelcranksha

15、Engine cooling systemEngine cooling systemEngine lubricating systemEngine lubricating systemFuel supply systemFuel supply systemValve gearValve gearWhats the function of the crankshaft and connecting rod mechanism? Its function is to convert heat energy into mechanical energy used to drive the vehic

16、les. Pre-questionsWhats the function of the craThe internal combustion engine, as its name indicates, burns fuel within the cylinders and converts the expanding force of the combustion into rotary force used to propel the vehicle.译文：内燃机，顾名思义，就是燃料在气缸内部燃烧，并且把燃烧时的膨胀力转化为驱动车辆的旋转力。II. Text ExplanationThe

17、internal combustion engineOf all automobile components, an automobile engine is the most complicated assembly with dominant effects on the function of an automobile. complicated kmplikeitid adj.复杂的, 难解的dominance dmnns n.优势, 统治译文：汽车发动机是一切汽车部件中结构最复杂，对汽车功能起支配作用的一个总成。II. Text ExplanationOf all automobil

18、e components, Its function is to convert heat energy into mechanical energy used to drive the vehicles.Convertinto. 转变；变换译文：它的作用就是将热能转换成机械能用来驱动汽车 。II. Text ExplanationIts function is to convert heaCo.转变；变换That building has been converted into a school. 那座楼房改成学校了。兑换 I want to convert some H

19、ong Kong dollars into American dollars. 我想把一些港元换成美元。改变信仰、党派或意见等 She managed to convert him to her opinion. 她终于设法说服了他接受她的意见。II. Text ExplanationCo.II. Text ExplPower is produced by the linear motion of a piston in a cylinder. linear lini adj. 线的, 直线的, 线 性的 piston pistn n.活塞II. Text Explanat

20、ionPower is produced by the lineaThe piston attached to the top of a connecting rod by a pin, called a piston pin or wrist pin. attach to v. 连接 connecting rod 连杆 piston pin = wrist pin 活塞销II. Text ExplanationThe piston attached to the topThe connecting rod transmits the up-and-down motion of the pis

21、ton to the crankshaft, which changes it into rotary motion. transmitto 把传到 which changes it into rotary motion 定语从句II. Text ExplanationThe connecting rod transmits tdiesel engineswater pumpthe ignition distributoroil pantiming gearcrankshaft and connecting rod mechanismvalve gearfuel systemexhaust p

22、ipeexhaust manifoldIII. ExercisesTranslate the following expressions into Chinese.柴油发动机水泵分电器油底壳正时齿轮曲柄连杆机构配气机构燃油系统排气管排气歧管diesel enginesIII. ExercisesTr1-cylinder head cover 2-piston3-timing toothed belt4-water pump5-oil pan6-oil pump7-crankshaft8-flywheel9-distributor10-valveIII. Exercises1-cylinder

23、head cover III. ExeThe crankshaft represents the final link in the conversion of reciprocating motion at the piston to one of rotation at the flywheel. In the cast of the multi-cylinder engine, the crankshaft has to control the relative motions of the pistons, while receiving their own impulses. A o

24、ne-piece construction is most commonly used for the motor-vehicle crankshaft, which extends the whole length of the engine and must therefore possess considerable rigidity . III. ExercisesThe crankshaft represents the The timing-drive for the engine valve mechanism is taken from the front end of the

25、 crankshaft as is the pulley and belt drive for the engine auxiliaries, such as the cooling fan and the alternator for electrical system. attached to the rear end of the crankshaft is the engine flywheel .III. ExercisesThe timing-drive for the enginI. Translate the following sentences into Chinese.1

26、Engine is the power source of the automobile. Power is produced by the linear motion of a piston in a cylinder.发动机是汽车的动力源.它通过汽缸内的活塞线性运动产生的.2The fuel system works according to the requirements of the engine as it provides an air-fuel mixture which must be in proportion to the speed and load placed on the engine.燃油系统的作用是根据发动机的转速和负荷提供一定比例的可燃混合气以满足发动机的需求。III. ExercisesI. Translate the following sen3The valve gear provides timely admissi