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本文根据东风_4型机车柴油机铝活塞在运用中大量出现裙体底部折断的问题,分析了折断的原因,并提出该活塞改造的理论,文中还介绍了改造成功后的试验效果。
In this paper, according to the fact that the aluminum piston of Dongfeng-4 locomotive diesel engine is broken during the operation, the reason of breakage is analyzed. The theory of piston modification is also presented. The test results after the successful transformation are also introduced.