一般来说，发动机配气相位的改变对工作性能的影响，要比零部件轻微的磨损或者调整失准造成的影响大得多。配气相位改变会引起发动机冒黑烟，油耗增加，功率下降，发生异响，甚至造成撞断配气机构零件，打烂活塞、缸套和气缸盖等严重事故。检查和校准配气相位是一项技术性... In general, changes in the gas phase of the engine have a much greater impact on performance than are minor wear or misalignment of parts. Gas phase change will cause the engine black smoke, fuel consumption increases, the power down, the occurrence of abnormal sound, and even caused by the breakdown of the valve body parts, piston smashing, cylinder liner and cylinder head and other serious accidents. Check and calibration gas phase is a technical ...