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一辆装有KE型燃油喷射系统的奥迪五缸乘用车,出现冷车怠速转速过低甚至熄火,热车怠速不稳和空档滑行熄火的现象。承修该车后,首先用仪器对其怠速状况进行检查,发现此时其怠速转速为670r/min,怠速控制阀的控制电流为540mA,尾气中CO的体积百分数为8.2％,点火提前角为7.4°。于是就按照该型车的有关参数进行调整:将怠速转速调整至820r/min,将尾气中CO的体积百分数调整至1.2％,这时怠速控制阀的控制电流为430mA。于是又将发动机熄火几分
An Audi five-cylinder passenger car equipped with a KE-type fuel injection system experienced the phenomenon of low idle speed or even stalling of the cold vehicle, unstable hot-vehicle idle speed and neutral taxiing. After the repair of the car, first check the idle condition with the instrument and found that at this time the idle speed of 670r / min, the control current of the idle speed control valve is 540mA, the volume percentage of CO in the exhaust gas is 8.2% and the ignition advance angle is 7.4 °. So in accordance with the type of vehicle parameters to be adjusted: the idle speed is adjusted to 820r / min, the exhaust gas volume fraction of CO adjusted to 1.2%, then the idle speed control valve control current of 430mA. So turn the engine off a bit