项目2-发动机燃油供给系统认识-4学时.pptx

单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,2025/1/7 周二,汽车,实用英语,全国交通运输职业教育教学指导委员会,马林才,刘大学,韩建保,“十二五”职业教育国家规划,教材,组织编写,主,编,副,主,编,主,审,2025/1/7 周二,四冲程发动机构造与工作过程介绍,发动机燃油供给系统认识,发动机冷却系统和润滑系统认识,汽车底盘构造认识,汽车电气设备和主动安全系统介绍,项目一,项目二,项目三,项目四,项目五,项目六,项目七,项目八,汽车车身电气设备和被动安全系统介绍,车载网络系统与自动驾驶技术介绍,新能源汽车介绍,项目九,汽车性能参数及检测设备介绍,项目十,汽车故障诊断仪和数据流,项目十一,汽车使用说明书及维修资料,项目二,发动机燃油供给系统认识,学习目标,学习时间,任务描述,引导问题,项目内容,1,2,3,4,5,拓展材料,6,1.认识关于燃油供给系统的组成和作用等的英语术语和词汇；,2.理解电子燃油喷射系统的固定表达方法；,3.运用所学知识，借助专业词典，对关于燃油供给系统资料进行中英文互译；,4.在教师指导下，完成与发动机燃油供给系统相关的英语资料阅读和翻译；,5.正确完成课后练习。,.,时间要求,:,建议,4,学时,学习时间,学习目标,以汽油发动机为例，学习有关发动机燃油供给系统知识，包括油箱、油泵、燃油滤清器、供油管、喷油器、燃油压力调节器及回油管以及电子燃油喷射系统等，完成相关词汇、特殊语句的认识。通过完成该任务，能阅读关于发动机燃油供给系统的英文文献，并能运用所学项目知识和翻译技巧，翻译相关文献。,任务描述,引导问题,你知道下图中英文的意思吗？,项目内容,Project 2,Acquaintance with Engine Fuel System,项目内容,Project 2,Acquaintance with Engine Fuel System,项目内容,Project 2,Acquaintance with Engine Fuel System,Multipoint injection is the most commonly used,and consists of fuel tank,fuel pump,fi lter,fuel rail,injectors,pressure regulator,air cleaner and ducting,throttle valve,air flow meter,plenum chamber,intake manifold and electronic control unit(ECU)(shown as Figure 2-1).,项目内容,Project 2,Acquaintance with Engine Fuel System,The fuel supply system consists of the fuel tank,fuel pump,fuel filter,fuel supply pipe,fuel injector,fuel pressure regulator and fuel return pipe(shown as Figure 2-2).,项目内容,Project 3,Acquaintance with Engine Cooling,and Lubricating Systems,The vapor pipe vents the fuel tank to the charcoal canister.Other pipes connect the fuel pump to the carburetor,and the charcoal canister to the engine(shown as Figure 2-3).,项目内容,Project 3,Acquaintance with Engine Cooling,and Lubricating Systems,项目内容,Project 3,Acquaintance with Engine Cooling,and Lubricating Systems,The air induction system consists of the air cleaner,air flow meter,throttle valve,air intake chamber,intake manifold runner and intake valve(shown as Figure 2-4).,The ECU receives signals from the various sensors,processes them and adjusts the amount of fuel that is delivered from the injectors.This enables,the air-fuel ratio to be adjusted to suit many different operating conditions(shown as Figure 2-5),.,项目内容,Project 3,Acquaintance with Engine Cooling,and Lubricating Systems,项目内容,Project 3,Acquaintance with Engine Cooling,and Lubricating Systems,项目内容,Project 3,Acquaintance with Engine Cooling,and Lubricating Systems,2.Translate the following words or phrases into Chinese.,1）electronic fuel injection 2）charcoal canister 3）single point fuel injection,4）fuel fi lter 5）engine startability 6）engine compartment,7）pressure regulator 8）fuel return pipe 9）air fl ow meter,3.Translate the following words or phrases into English.,1）燃油供给系统 2）燃油滤清器 3）空气流量计,4）电子燃油喷射 5）多点燃油喷射 6）冷起动喷油器,7）节气门体燃油喷射 8）空气进气系统 9）输油管,拓展材料,Practical Reading,Engine Measurement and Performance Characteristics,拓展内容,拓展材料,The former chapters presented the scientific principles upon which the automobile engine operates.It is time to expand on the topic of engine operation by exploring the many factors that influence engine performance.These factors include bore,stroke,displacement,compression ratio,compression pressure,volumetric efficiency,thermo efficiency,and mechanical efficiency.There are a few negative factors that adversely affect the normal combustion process and can cause power loss and serious engine damage.These factors are,of course,detonation and surface ignition.,Bore,The bore of an engine is a measurement taken inside the cylinder.Actually the bore is the diameter of the cylinder itself.The larger the cylinder bore,of course,the more powerful will be the power stroke because a bigger piston has more area on which the high pressure combustion gases can push down.,拓展材料,Stroke,Stroke is also a basic cylinder measurement.However,in this case,the measurement is that of the actual piston travel within the cylinder as it moves from TDC to BDC or back again.A square engine is one that has a bore and stroke of the same dimension;whereas,an oversquare engine has a bore greater than its stroke.,Displacement,Manufacturers commonly use displacement to indicate engine size;this specification is really a measurement of cylinder volume.In other,words,when the piston moves up from BDC to TDC,it displaces or pushes away a given volume of gases.Of course,the number of cylinders that an engine has,will determine total enginedisplacement.Therefore,engine displacement is always equal to the piston displacement of one cylinder multiplied by the number of cylinders in the engine.,拓展材料,Compression Ratio,Another design feature of an engine that determines the total power output of an engine is compression ratio.Compression ratio is a measure of the cylinder volume in cubic inches above the piston when it is at TDC(its clearance volume)compared to the cylinder volume above the piston when it is at BDC.When considering this statement,total cylinder volume appears to be the same thing as piston displacement,but it is not.Total cylinder volume is equal to piston displacement plus combustion chamber volume.The combustion chamber volume,with the piston at top dead center(TDC)is commonly known as clearance volume.Compression ratio is nothing more than the total volume of a cylinder divided by the clearance volume.The formula for fi nding compression ratio is then(total volume)/(clearance volume).,拓展材料,谢谢观看！,