专业英语-2汽车发动机概要

1、Automobile EnglishAutomobile English 2Task Two Automobile EngineObjectives1. To know about the importance and the types of the automobile engine;2. To learn the basic structure and principle of the internal combustion engine;3. To learn how a hybrid engine works.Back Next 31.According to fuelGasolin

2、e EngineDiesel Engine BMW 6-cylinder BMW 6-cylinder gasoline enginegasoline engine JAGUAR diesel engine Part Warm upDifferent types of engines (Classification)42.According to “Stroke”Four-stroke EngineTwo-stroke EngineFour-stroke EngineTwo-stroke EnginePart Warm upDifferent types of engines (Classif

3、ication)53.According to Cooling SystemWater-cooled engineAir-cooled engineA cylinder from an air-cooled enginePart Warm upDifferent types of engines (Classification)64.According to CylindersSingle-cylinderMulti-cylinder Inline -type Horizontally opposedSingle-cylinderMulti-cylinderPart Warm upDiffer

4、ent types of engines (Classification)7Back Next InlinePart Warm upDifferent types of engines (Classification)8-typePart Warm upDifferent types of engines (Classification)9Horizontally OpposedPart Warm upDifferent types of engines (Classification)10nGrasp the useful words and phrasesnnews conferencen

5、put it on the marketPart Listening and speakingBack Next 11nThe internal combustion engine means that the engine burns fuel within the cylinders, and converts the heat energy of fuel combustion into mechanical force used to propel the vehicle. Part ReadingPassage One Construction of Internal Combust

6、ion Engines Back Next 12Part ReadingPassage One Construction of Internal Combustion Engines Back Next Ignition system Starting systemLubricating systemCooling systemFuel systemValve and Valve trainCrankshaft and connecting rod assemblyengine13Part ReadingPassage One Construction of Internal Combusti

7、on Engines 14Total Total cylinder cylinder volumevolumeCombustion chamber volumeCombustion chamber volumeCylinder operating Cylinder operating volumevolumeTop dead centerTop dead center bottom dead bottom dead centercenterJourney of pistonJourney of piston (Stroke) (Stroke)crankshaft crankshaft Semi

8、diameterSemidiameter排量displacement15 Timing gearCamshaft Oil pan bearing Oil pan crankshaft piston Connecting rod valvecylinder正时齿轮气缸轴承油底壳曲轴连杆活塞气门凸轮轴16Part ReadingPassage One Construction of Internal Combustion Engines Back Next 气缸盖罩气缸体气缸盖气缸垫17Part ReadingPassage One Construction of Internal Combust

9、ion Engines Crankshaft and connecting rod assembly气环油环正时齿轮活塞连杆飞轮曲轴轴瓦减震器和皮带轮18Part ReadingPassage One Construction of Internal Combustion Engines Valve and valve train正时皮带轮凸轮轴气门活塞连杆曲轴正时皮带轮张紧轮19Part ReadingPassage One Construction of Internal Combustion Engines Starting system20Part ReadingPassage One

10、 Construction of Internal Combustion Engines Cooling system211.Intake Stroke 2.Compression Stroke 3.Power Stroke 4.Exhaust Stroke Part ReadingPassage Two How the Four-stroke Internal Combustion Engine Works22 Operating principle: Intake StrokeExhaust vale closesIntake valve opensPiston moves downwar

11、dAir-fuel mixture is introduced into the cylinder23Exhaust valve closesIntake valve closesPiston moves upwardAir-fuel mixture is compressed Operating principle: Compression Stroke24Exhaust valve opens near the bottom of the strokeIntake valve closesPiston moves downwardExhaust valve closesSpark plug

12、 ignites the air-fuel mixture before the piston reaches TDC on the compression stroke. Operating principle: Power Stroke25Exhaust valve opensIntake valve opens just before the end of exhaust strokeExhaust gases are pushed out of the cylinderPiston moves upwardIntake valve closes Operating principle:

13、 Exhaust Stroke26nThe _ which is called the “heart” of a vehicle is used to supply _ for an automobile.nPower is produced by the linear motion of a piston in a _. enginepowercylinderPart ReadingPassage TwoExercises27nThe _ engine means the engine burns the fuel within the cylinders.nThe function of

14、_ is to help the engine run smoothly by absorbing some of the energy during power stroke and release it during the other ernal combustionflywheelPart ReadingPassage TwoExercises28nIt is well-known that the automobile is composed of four sections such as_, _, _, _. nThe four piston strokes

15、 are _, _, _, _.engine chassis body electrical system intake stroke compression stroke power stroke exhaust stroke Part ReadingPassage TwoExercises291.Intake manifold2.Camshaft3.Intake valve4.Spark plug5.Exhaust valve6.Exhaust manifold7.Cylinder head8.Engine block9.Combustion chamber10.Piston 11.Con

16、necting rod123457811910630Back Next Part ReadingPassage Three Hybrid Engines31Back Next nHybrid Engines are described as engines that combine two or more sources of power, generally gasoline and electricity. nThere are two types of gasoline-electric hybrid: the parallel hybrid, and the series hybrid

17、. Both use gasoline-electric hybrid technology, but in radically different ways.Part ReadingPassage Three Hybrid Engines32Back Next Part ReadingPassage Three Hybrid Engines33Back Next Part ReadingPassage Three Hybrid Engines本田混合动力电动汽车系统演示视频混合动力汽车视频34nEngine oil has limited lifeafter a certain point

18、it starts losing lubricating qualities and carbonizing. Once it happens, the engine gets contaminated with carbon deposits (sludge) that significantly shorten engines life. Part Maintenance and repairHow to check the engine oilBack Next 35n1. Regular oil change is the most important factor in keeping the engine running. If you do it more often than suggested by the manufacturers schedule, thats even better.n2. Always preheat the engine before starting itespecially during break-in.n3. Try to avoid engine overheatingPart Maintenance and repairEngine maintenance tip