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一辆本田里程(HONDA LEGEND)KA7乘用车,发动机排量为3.2 L。该车因发动机不着火而送修。经检查,高压火花正常,燃油压力为240 kPa,属正常范围(燃油压力标准值:在怠速运转或将点火开关转至ON,持续2s后,把点火开关转至OFF,读取油压表指示值应为206～255 kPa)。检查喷油脉冲信号正常。拆下火花塞,检测点火正时,由正时检测孔观察得知,点火正时正确。测量气缸压力,第2缸为400kPa,第5缸为650kPa,其余各缸约为850～900kPa,压力较低,估计是由于发动机不着火,经
A HONDA LEGEND KA7 passenger car with an engine displacement of 3.2 L. The car was repaired because the engine did not catch fire. After examination, the high-pressure spark is normal, the fuel pressure is 240 kPa, which is within the normal range (fuel pressure standard value: at idle or turn the ignition switch to ON for 2s, turn the ignition switch to OFF, read the hydraulic gauge instruction Value should be 206 ~ 255 kPa). Check the injection pulse signal is normal. Remove the spark plug, ignition timing detection, observation by the timing detection hole that the ignition timing is correct. Cylinder pressure measurement, the second cylinder 400kPa, the fifth cylinder 650kPa, the rest of the cylinder about 850 ~ 900kPa, the pressure is low, it is estimated that the engine is not fire, the