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故障现象一辆1995年日产风度A32乘用车发动机怠速时有时游车,加速到1700～2000r/min时也有游车;无负荷时急加速顺畅,但排气很臭(混合气燃烧不完全);当急加油收油后,有时发动机会熄火,转动转向盘和开空调挂档时也会熄火。故障诊断急加油收油后发动机会熄火的故障可能是怠速控制阀过脏引起的,因为急加油收油后回到怠速状态,此时是由怠速控制阀控制的。在转动转向盘和开空调时发动机的负荷增大,其怠速提升由IACV-FICD电磁阀2和IACV-FICD电磁阀1分别进行控制。转动转向盘时动力转向油压开关接通,控制IACV-FICD电磁阀2工作;当开空调时,空调继电器控制IACV-FICD电磁阀1工作。因此,首先应清洗怠速控制阀。
Symptoms A 1995 Nissan demeanor A32 Passenger car engine idling sometimes traveling, accelerating to 1700 ~ 2000r / min when there are trains; no-load emergency acceleration smoothly, but the exhaust is very smelly (incomplete combustion of the mixture) ; When the emergency fuel oil income, sometimes the engine will turn off, turning the steering wheel and open the air-conditioners stall will also turn off. Fault Diagnosis After the fuel tanker oil will turn off the engine failure failure may be caused by the idling control valve is too dirty, because the urgent return to idle oil after receiving oil, this time is controlled by the idle speed control valve. When turning the steering wheel and opening the air conditioner, the engine load increases. The idle speed increase is controlled by IACV-FICD solenoid valve 2 and IACV-FICD solenoid valve 1 respectively. When the steering wheel is turned, the power steering hydraulic switch is turned on to control the operation of the IACV-FICD solenoid valve 2. When the air conditioner is turned on, the air conditioning relay controls the IACV-FICD solenoid valve 1 to work. Therefore, the idle speed control valve should be cleaned first.