高速配气机构设计中一个不可忽视的薄弱环节是气门间隙调整螺钉头部的挤压疲劳。
The squeezing stress between the valve end the screw for adjusting valve clearance must be taken into account in designing high speed valve train.
柴油机横臂导杆折断会带来严重后果，经分析认为其折断原因有：同名气门杆顶部不齐；调整螺母松动，调整螺钉窜动；气门导管与气门杆间隙量大。
The reasons are: different top heights of valve rods having the same names; loose adjustment nuts or adjustment screws moving; and big clearances between valve guides and valve rods.
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