专业英语2汽车发动机概要.ppt

专业英语专业英语2 2汽车发动机概汽车发动机概要要Task 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 1.According to fuelGasoline EngineDiesel Engine BMW 6-cylinder BMW 6-cylinder gasoline enginegasoline engine JAGUAR diesel engine Part Warm upDifferent types of engines(Classification)2.According to“Stroke”Four-stroke EngineTwo-stroke EngineFour-stroke EngineTwo-stroke EnginePart Warm upDifferent types of engines(Classification)3.According to Cooling SystemWater-cooled engineAir-cooled engineA cylinder from an air-cooled enginePart Warm upDifferent types of engines(Classification)4.According to CylindersSingle-cylinderMulti-cylinder Inline -type Horizontally opposedSingle-cylinderMulti-cylinderPart Warm upDifferent types of engines(Classification)1 Back Next InlinePart Warm upDifferent types of engines(Classification)-typePart Warm upDifferent types of engines(Classification)Horizontally OpposedPart Warm upDifferent types of engines(Classification)nGrasp the useful words and phrasesnnews conferencenput it on the marketPart Listening and speakingBack Next nThe 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 Combustion Engines Back Next Part ReadingPassage One Construction of Internal Combustion Engines Back Next Ignition system Starting systemLubricating systemCooling systemFuel systemValve and Valve trainCrankshaft and connecting rod assemblyenginePart ReadingPassage One Construction of Internal Combustion Engines Total 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 SemidiameterSemidiameter排量displacementTiming 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Part ReadingPassage One Construction of Internal Combustion Engines Back Next 气缸盖罩气缸体气缸盖气缸垫Part ReadingPassage One Construction of Internal Combustion 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Part 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Part ReadingPassage One Construction of Internal Combustion Engines Starting systemPart ReadingPassage One Construction of Internal Combustion Engines Cooling system1.Intake Stroke 2.Compression Stroke 3.Power Stroke 4.Exhaust Stroke Part ReadingPassage Two How the Four-stroke Internal Combustion Engine Works Operating principle:Intake StrokeExhaust vale closesIntake valve opensPiston moves downwardAir-fuel mixture is introduced into the cylinderExhaust valve closesIntake valve closesPiston moves upwardAir-fuel mixture is compressed Operating principle:Compression StrokeExhaust valve opens near the bottom of the strokeIntake valve closesPiston moves downwardExhaust valve closesSpark plug ignites the air-fuel mixture before the piston reaches TDC on the compression stroke.Operating principle:Power StrokeExhaust valve opensIntake valve opens just before the end of exhaust strokeExhaust gases are pushed out of the cylinderPiston moves upwardIntake valve closes Operating principle:Exhaust StrokenThe _ 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 TwoExercisesnThe _ engine means the engine burns the fuel within the cylinders.nThe function of _ is to help the engine run smoothly by absorbing some of the energy during power stroke and release it during the other strokes.internal combustionflywheelPart ReadingPassage TwoExercisesnIt is well-known that the automobile is composed of four sections such as_,_,_,_.nThe four piston strokes are _,_,_,_.engine chassis body electrical system intake stroke compression stroke power stroke exhaust stroke Part ReadingPassage TwoExercises1.Intake manifold2.Camshaft3.Intake valve4.Spark plug5.Exhaust valve6.Exhaust manifold7.Cylinder head8.Engine block9.Combustion chamber10.Piston 11.Connecting rod1234578119106Back Next Part ReadingPassage Three Hybrid EnginesBack 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.Both use gasoline-electric hybrid technology,but in radically different ways.Part ReadingPassage Three Hybrid EnginesBack Next Part ReadingPassage Three Hybrid EnginesBack 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nEngine oil has limited lifeafter a certain point 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 n1.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 tipsBack Next n4.Changing spark plugs,air filter,timing belt,and other items based on the maintenance schedule will save you from expensive repairs.n5.Fix any small problem right away before it causes a serious damage.Part Maintenance and repairEngine maintenance tipsBack Next Back Next 机油选择 视频更换机油 视频Part Maintenance and repairEngine maintenance tipsnAlternative fuels are derived from resources other than petroleum.they produce less pollution than gasoline or diesel.Part Outward BoundAlternative fuelsBack Next Back Next 可替代燃料汽车 视频Part Outward BoundAlternative fuelsThank you!Automobile EnglishAutomobile English 结束结束