广大汽车驾驶员和汽车修理工对汽车怠速的调整都非常感兴趣。他们反映:按“理”说汽车怠速越低越“省油”,可是尾气排放检测又不合格。 传统的认识是汽车发动机怠速越低越“好”、越“省油”,甚至某些技术资料中不分车型硬性规定300～400r/min为合理汽车怠速。怠速转速过低,发动机必须燃用过浓混合 The majority of car drivers and auto mechanics on the car idle speed adjustment are very interested. They reflect: According to “reason” that the lower the car idling the more “fuel-efficient”, but the exhaust emissions testing failed. The traditional understanding is that the lower the engine idle speed, the more “good”, the more “fuel-efficient” and even some technical data, regardless of the type of vehicle rigid rules 300 ~ 400r / min for a reasonable car idling. Idle speed is too low, the engine must be used over rich mixture