7-怠速控制汇总.ppt

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,*,ENGINE CONTROLS PART#3,-IDLE SPEED CONTROL,Purpose of ECU Controlled,Idle Speed Control Systems,The Idle Speed Control system regulates idle speed under at least one or more of the following conditions,depending on application:,Fast Idle,Warm Curb Idle,Air Conditioner Load,Electrical Load,Automatic Transmission Load,发动机掌握局部,怠速掌握,电脑掌握单元作用,怠速掌握系统,在至少以下一个或更多条件下怠速掌握系统进展怠速调整,打算条件,快怠速,暖机掌握怠速,空调负载,电控负载,自动变速器负载,怠速掌握根本组成,空气滤清器,点火开关,蓄电池,发动机电脑,传感器,怠速掌握阀,进气管,节气门阀,Four Different ECU Modulated,Idle Speed Control Systems(ISC),There are four different types of ECU controlled ISC systems used on Toyota engines.These systems are referred to as:,Stepper motor type,Rotary solenoid type,Duty control ACV type,On-off control VSV type,四种不同模式的怠速掌握系统,丰田发动机上应用有四种不同的ECU调整怠速掌握系统,这些类型包括：,步进电机型,旋转的电磁螺线管型,占空比空气掌握阀型,真空通断开关掌握阀型,Step Motor Type ISC Valve,节气门阀,进气歧管,空气流量计,传感器,怠速掌握阀,步进电机型怠速掌握阀,转子,枢轴阀,线圈,阀轴,延长气门,缩短气门,微处理器,主继电器掌握电路,步进电机怠速掌握系统应用和掌握参数,相关输入信息,Primary Controlled Parameters,Initial Set-up,Engine Starting Control,根本掌握参数,最初设置,发动机启动掌握,最初设置和启动后掌握,步进电机齿数,冷却剂温度,发动机转速,后启动掌握,Engine Warm-up Control 暖机掌握,步进电机齿数,冷却剂温度,预热掌握,发动机转速,Feedback Idle Speed Control,怠速信号反响掌握,步进电机齿数,冷却剂温度,无负载反响信号,负载反响信号,发动机转速,启动后掌握,预热启动掌握,7M-GE步进电机怠速掌握局部的对象,空调开关的位置,空挡/启动开关位置,目标怠速值,旋转螺线管式怠速掌握,来自空气滤清器,传感器,节气门阀,进气歧管,怠速掌握阀,发动机电脑,进气缸,到进气歧管,旁通孔,阀门,到P/S怠速提升掌握阀,剖面A-A,永久磁铁,通气孔,阀门,掌握杆,护罩,固定销,双金属片,怠速掌握阀原理,线圈T,2,线圈T,1,传感器信号,永久磁铁,线圈T1,线圈T2,传感器信号,变向器,占空比信号,The ECU controls movement of the valve by applying a 250 Hz duty cycle to coils T1 and T2.The electronic circuitry in the ECU is designed to cause current to flow alternately in coil T1 when the duty cycle signal is low and in coil T2 when the signal is high.By varying the the duty ratio(on time compared to off time),the change in magnetic field causes the valve shaft to rotate.,电脑通过供给一个250HZ占空比循环电流给T1和T2掌握阀门移动。

当占空比信号高时电脑让电流送给T1，低时给T2通过转变占空比从而转变内部磁性使阀门做旋转运动低占空比,高占空比,旋转电磁螺线管式怠速掌握阀系统应用和掌握参数,怠速掌握阀式发动机,相应的输入信号,掌握参数,自动变速器怠速提升,电控负载怠速提升,暖机怠速,冷机怠速,到进气歧管,电磁线圈,来自空气滤清器,输入信号,微处理器,增加和削减通气量,真空掌握阀,节气门阀,Diagnostic Mode,On-Off Control Vacuum Switching,Valve(V-ISC System),诊断模式,真空开关掌握阀,点火开关,各种信号,尾灯继电器,尾灯,灯开关,雾灯开关,雾灯继电器,截止二极管组,后风窗除霜装置,怠速掌握系统应用和掌握参数,怠速掌握阀式发动机,相关输入信号,掌握参数,Input Sensors Affecting Idle,Speed Control Output,Engine RPM(,Ne,),Throttle Position(IDL),Engine Coolant Temperature(THW),Vehicle Speed(SPD),Vehicle Speed Sensor Operation,输入信号影响怠速掌握的输出,发动机转速信号,节气门位置信号,发动机冷却剂温度,车速,车速传感器操作,Reed Switch Type:,舌簧开关,到速度表电缆,磁铁,舌簧开关,Photocoupler Type:,光电耦合器,有切槽的轮子,发光二极管,耦合器,光电三极管,到速度计电缆,Electrically,both the Reed type and Photocoupler type speed sensors work the same.The sensor is,in fact,a switch.By switching on and off,the sensor pulls a reference voltage from the ECU to ground.The resulting voltage drop is monitored by the ECU as the SPD signal.,从电的方面来讲，簧片开关型和和光电耦合器型速度传感器的工作原理一样。

这个传感器事实上是一个开关，通过开关的开与关，传感器在电脑与接地之间分出一个参考电压分出后的降低的电压被ECU监控作为速度信号数字仪表式计算机,舌簧开关,到其他电脑,Minor Impact Sensors,Neutral Start Switch(NSW),Engine Cranking Signal(STA),Air Conditioning Compressor Signal(A/C),Electrical Load Sensor(ELS),次要影响的传感器,空挡起动开关,发动机曲轴信号,空气调整压力信号,电路负载传感器,空挡起动开关电路,点火开关,空挡起动开关,电路开关继电器,起动电磁螺线管,微处理器,电路负载信号,空调压缩机离合器信号,尾部继电器,灯掌握开关,雾灯继电器,雾灯开关,空调开关,空调压缩机,微处理器,二极管组,。