节气门体介绍ppt课件.ppt
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1、节气门体在汽油机控制系统中的作用 汽油机的工作是将燃油和空气充分有效地按一定比例混合,通过定时点火燃烧爆炸,然后将爆炸产生的能量通过曲轴向外输送,怎样才能根据不断变化的需求去组织燃烧,达到最佳的空气燃油比例?节气门体起到了一个重要的作用。 首先根据来自油门踏板的位置提出了对发动机的扭矩需求,然后ECU根据这个需求换算成以节气门体的开度要求为表现形式的空气进气量的要求;最后配之以为达到最佳燃烧效果的燃油供油量,达到最佳的动力性、经济性和排放。,The role of throttle body in gasoline engine control systemGasoline engines j
2、ob is to fuel and air mixed in certain proportion, efficiently by timing ignition burning explosion, and then send the blast energy through the crankshaft to the outside, how can according to the changing needs to organize the combustion, best air fuel ratio? Throttle body plays a important role.Fir
3、st of all, according to the position of the accelerator pedal is put forward on the engine torque requirements, then converted to ECU according to the needs to the opening of throttle body demands of air volume in the form of; The final match of the thought to achieve the best effect of combustion o
4、f fuel oil, to achieve the best performance, fuel economy and emissions,2,2022/11/19,Carbon canister,Camshaft phaser*,Fuel rail/Injector,Canister purgevalve,Air mass,Diagnosislamp,Diagnosisinterface,Immobilizer,Accelerator pedal module,Throttledevice(ETC),Knocksensor,Delivery module withlow pressure
5、 pump,OxygenSensor*,Pre catalyst*,Oxygen sensor,Maincatalyst,CAN,Intake manifoldsensor,EGR-valve*,ETCEOBDRLFS,* option,Source: GS/VSA 6402e,Speedsensor,Phasesenor,Temp.sensor,Electronic Throttle ControlEuropean On-Board Diagnosis SystemReturnless Fuel Supply System,Camshaft phaser:intake and/orexhau
6、st phasing,* Reserve for EOBD,Air mass meter withIntake air temperature,Electroniccontrol unit,系统原理图(System principle),3,2022/11/19,1. 电子节气门体(Electronic throttle body)工作原理:电子节气门是电子节气门控制系统的一个关键部件,它一方面执行来自发动机ECU的指令,调节节气门开度来控制发动机的进气量,从而实现控制发动机的负荷输出,同时可以输出反映节气门开度位置的信号,供控制系统监控节气门工作状况。 电子节气门由节气门体、驱动电机和节气门
7、位置传感器等构成,来自发动机ECU的指令使驱动电机动作,通过传动机构使节气门板转动,保证发动机工作所需的节气门开度。节气门位置传感器由两个电位器组成,节气门开度变化时,电阻值发生变化,输出的电压信号随之变化,与电子油门踏板位置传感器信号一起,输入到发动机ECU,经计算后,输出驱动电机控制信号,从而控制发动机节气门开度。 同发动机控制系统一起,电子节气门配合工作,可以实现:发动机怠速控制,车辆巡航控制,Limp home控制,自动变速箱控制,车身电子稳定控制(ESP)等功能。,Working principle: electronic throttle is electronic throttl
8、e control system of one of the key parts, on the one hand, the execution of the instruction from the engine ECU, adjust the opening of throttle to control the engine into the air, so as to realize control of the load on the engine output, and can reflect the position of the throttle opening signal o
9、utput, working condition monitoring throttle for control system.Electronic throttle by throttle body, drive motor, and throttle position sensor, etc, from the engine ECU instructions that drive motor movement, through the drive mechanism to rotate the door plank of solar terms, to ensure that the en
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