１怠速工况的调整 在怠速工况下，发动机转速越低，混合气的均匀性越差，气缸内残留废气的相对比例也越大，越容易导致混合气的不完全燃烧。根据怠速工况下的这一燃烧机理，可在标定的发动机怠速转速范围内，调整怠速空气调节螺钉和节气门调整螺钉，以供给较稀的混合气。但怠速 1 idling condition adjustment In idling condition, the lower the engine speed, the worse the uniformity of the mixture, the relative proportion of residual gas in the cylinder is also larger, the more easily lead to the incomplete combustion of the mixture. Depending on the combustion mechanism at idle, the idle air adjustment screw and throttle adjustment screw can be adjusted to provide a leaner mixture at the calibrated engine idle speed. But idling