气门杆与导管为啥会卡死一台河北一１２型拖拉机，气门杆突然卡死，不知啥原因，机手来我校询问。我们考虑气门杆卡死，尤其排气门杆卡死，主要是由于气缸内燃烧不良造成的。供油过晚或供油量过大时，排气时气缸内有剩余火焰排出，导致排气门杆经常受到火焰热流的冲烧，在... Valve stem and catheter why a card will die a Hebei tractor 12, the valve stem suddenly stuck, I do not know why, hands to my school for questioning. We consider the valve stem stuck, especially the exhaust valve stem stuck, mainly due to poor combustion caused by the cylinder. When the fuel supply is too late or the fuel supply is too large, the remaining flame is discharged from the cylinder when the exhaust gas is exhausted, resulting in that the exhaust valve stem is often burned by the flame heat flux.