汽车专业英语第2版)330页完整版教学课件汇总全书电子教案.pptx

2022/7/20汽车专业英语 2022/7/20四冲程发动机基础知识介绍发动机构造认识燃油直喷系统发动机冷却系统和润滑系统认识发动机点火系统和起动系统认识任务一任务二任务三任务四任务五任务六任务七任务八底盘构造认识汽车检测设备认识KT600汽车诊断系统任务九汽车市场调查分析进出口交易的一般流程来人来电购车接待汽车产品配置介绍汽车保险办理汽车销售礼仪任务十任务十一任务十二任务十三任务十四任务十五任务十六汽车产品售后服务出国手续办理 任务一 四冲程发动机基础知识介绍Brief IntroductionWord ListText learning-exampleProper Names1234Translation of difficult sentence5Practical Reading6 Brief Introduction1.introduction,ntrdk()nn.介绍，传入，导言，绪论，入门2.unitjuntn.元件，部件，零件，装置3.vehiclevikln.交通工具，车辆4.engineendnn.发动机5.cylinderslndn.气缸，圆筒，圆柱体bustionkmbst()nn.燃烧7.burnbnvi.,vt.燃烧8.convertknvtvt.使转变，转换.9.pistonpst()nn.活塞10.crankshaftkrkftn.曲轴11.ignitiongn()nn.点火，点燃 Word List2022/7/20 Word List12.intakentekn.入口，进口13.starter/sttn.起动机14.clockwiseklkwazadj.顺时针方向的adv.顺时针方向地15.movementmuvm()ntn.运动，动作，运转16.vacuumvkjmn.真空，adj.真空的17.gasolinegslinn.汽油18.manifoldmnfldn.进、排气歧管19.strokestrkn.冲程，行程20.remainrmenvi.保持，逗留，剩余21.chargetdn.充气，装料22.draw/drvt.吸引，吸入2022/7/20 Word List23.constituteknsttjutvt.组成，构成presskmpresvt.压缩，浓缩25.traveltrv()lv.旅行，传播，行进26.powerpa n.能量，动力27.ignitegnatv.点火，点燃28.sparkspkn.火花29.revolutionrevlu()nn.旋转，转数，旋转一周30.expandkspnd;ek-vt.使膨胀，详述，扩张31.expendkspend;ek-vt.消耗，花费，支出32.passagepsdn.通道，通路33.portptn.通道，港口，端口34.continuouslykntnjsliadv.不断地，连续地2022/7/20 Word List35.attachttvt.安装上，系上，贴上36.resistrzstvt.抵抗，反抗，抗，忍得住37.inertia/nn.惯性，惯量38.eveniv()n adj.平滑的，偶数的，平均的39.automobiletmbiln.汽车40.arrangerendv.排列，安排41.flywheelflawiln.飞轮42.arrangementren(d)m()ntn.排列，安排43.adjacentdes()ntadj.邻近的，接近的44.coolantkul()ntn.冷却液45.mediummidmn.媒体，媒介，介质2022/7/20 Word List46.radiatorredetn.散热器47.tanktkn.水箱48.camshaftkmftn.凸轮轴 Text learning-example The engine is a self-contained power unit which converts the heat energy of fuel into mechanical energy for moving the vehicle.Because fuel is burned within the engine,it is known as an internal combustion engine.In the internal combustion engine,air/fuel mixture is introduced into a closed cylinder where it is compressed and then ignited.The burning of the fuel causes a rapid rise in cylinder pressure which is converted to useful mechanical energy by the piston and crankshaft.The most common engine is the four-stroke piston engine.These four strokes are intake stroke,compression stroke,power stroke and exhaust stroke.Internal Combustion EngineInternal Combustion Engine2022/7/20Text learning-exampleThe intake stroke of a four-stroke engine begins with the piston at top dead center(TDC).The starter causes the crankshaft to rotate in a clockwise direction.The crankshaft,through the connecting rod,forces the piston to move downward.This downward movement of the piston creates a vacuum,a difference in pressure,in the space above the piston.The engine manufacturer times the intake valve action so that it opens automatically at or slightly before the piston starts down.Intake StrokeIntake Stroke2022/7/20After the piston reaches bottom dead center(BDC),it moves upward again as the starter continues to turn the crankshaft in a clockwise direction.As the piston is beginning to move upward,the intake valve closes,and the exhaust valve remains closed.Since both valves are closed,the piston compresses the air/fuel mixture in the small space between the top of the piston and the cylinder head.As the piston reaches TDC again during its upward travel,the compression stroke of the piston is over.The air/fuel charge is now under compression so that it will produce a great deal of power when the spark plug ignites it.Text learning-exampleCompression StrokeCompression Stroke2022/7/20Just as or slightly before the piston reaches TDC on the compression stroke with the air/fuel mixture fully compressed,a timed electrical spark appears at the spark plug.This spark ignites the compressed air/fuel mixture.The burning mixture begins to expand;the pressure in the combustion chamber above the piston immediately increases.This results in a high pressure applied to the top of the piston.Now,both valves remain closed during the power stroke.This assures that the total force of the expanding gas applies itself to the head of the piston.Text learning-examplePower StrokePower Stroke2022/7/20Near the end of the downward movement of the piston on the power stroke,the camshaft opens the exhaust valve,but the intake valve remains closed.Although much of the gas pressure has expended itself driving the piston downward,some pressure still remains when the exhaust valve opens.This remaining pressurized gas flows comparatively freely from the cylinder through the passage(port)opened by the exhaust valve.Text learning-exampleExhaust StrokeExhaust Stroke2022/7/20For identification purposes,manufacturers classify automobile engines by their cylinder arrangement,valve arrangement,and type of system used to cool the engine.Engine manufacturers basically use three distinct ways to arrange the cylinders in an engine:in-line,V-shape,or opposed.Text learning-exampleEngine Classification Engine Classification 2022/7/20A liquid-cooled engine uses a liquid coolant as the medium to remove heat from。