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4115柴油机通常所用的两次对气门法是转动两次曲轴,分别确定出一缸或四缸活塞压缩行程的上死点,从前向后或从后向前依次调对1、2、3、5四个气门。为了确定一缸(或四缸)活塞压缩行程上死点,必须采用以下两种方法之一:①进气结束后,一边继续转动曲轴,一边用螺丝刀撬压一缸(或四缸)的一个气门,待该气门顶与活塞顶接触后,通过观察看撬压的气门是否被活塞顶到最高位置,来确定活塞是否达到上死点。②在转动曲轴的同时,把飞轮外壳上拧下的定位螺钉倒过头,试着插入飞轮的定位孔中,来确定活
4115 Diesel engine is usually used twice on the valve method is to rotate the crankshaft twice, respectively, to determine the compression stroke of a cylinder or four-cylinder piston top dead center, from front to back or from front to back in turn 1,2,3,5 Four valves. To determine the dead center of a cylinder (or four cylinder) piston compression stroke, one of the following two methods must be used: ① After the intake air is completed, continue to rotate the crankshaft with a screwdriver to pry one cylinder (or four cylinder) Valve, to be the top of the valve and the top of the piston contact, by observing whether the pry pressure valve is the highest position of the piston to determine whether the piston reaches the top dead center. ② while turning the crankshaft, the flywheel housing unscrew the positioning screw turned over, try to insert the positioning hole of the flywheel to determine the live