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有一台SI95型柴油机,修理时换了气门和气门导管。试车时,刚着火就大量冒黑烟,接着就熄火了。拆机检查,发现气门摇臂断裂,当时认为是气门间隙过小所致。调整后再次发动,情况同前。拆机检查,发现推杆被顶弯,经反复检查找不出原因。最后找来一个旧缸盖,经仔细对比,才发现气门导管安装高度(见图中H)过高,当凸轮升程增加,使摇臂端头与气门导管相抵时,摇臂端头不能继续下移,便会造成因
There is a SI95-type diesel engine, the valve and valve guide for the repair change. When the test car, just a large number of black smoke on fire, and then turned off. Disassemble inspection and found that the valve rocker arm fracture, was considered to be caused by valve clearance is too small. Adjust to start again, the situation with the previous. Disassemble inspection and found that the putter is bent over, after repeated inspections can not find the reason. Finally, to find an old cylinder head, after careful comparison, only to find the valve guide installation height (see Figure H) is too high, when the cam lift increases, the rocker arm end and valve guide against the end of the rocker arm can not continue Move down, it will cause