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车身在怠速时抖动明显,一般要先观察热车前提下怠速时转速表是否稳定。若转速表显示不稳定,则可能的故障原因如下:1.怠速开关不闭合故障分析:怠速触点断开,ECU便判定发动机处于部分负荷工况状态。此时ECU根据空气流量计和曲轴转速信号确定喷油量。而此时发动机实际上却是在怠速工况下工作,进气量较少,造成混合气过浓,转速上升。当
When the body jitter evident at idle, generally observe the hot car under the premise of idle speed tachometer is stable. If the tachometer is unstable, the possible causes are as follows: 1. Idle switch is not closed Failure Analysis: The idle contact is open, the ECU will determine the engine is in partial load condition. At this point ECU air flow meter and crankshaft speed signal to determine the amount of fuel injection. At this point the engine is actually working under idle conditions, intake less, resulting in mixed gas is too thick, the speed increased. when