内燃机车柴油机磨合规范的试验研究

采用检测表面形貌的方法，通过模拟试验对东风４Ｂ型内燃机车柴油机的现行磨合规范进行试验研究，研究分析磨合进展情况，提出了改进的磨合规范，并在实际使用的机车柴油机上做实测性试验，检测磨合前后柴油机缸套内表面的表面形貌的变化，以判断“改进磨合规范”合理程度。试验结果表明：按“改进磨合规范”麻合比按现行磨合规范磨合缩短时间３７％左右。

Experimental Study on the Running-in Specifications of Diesel Locomotive Engine

By measuring the topographies of inner surfaces of diesel cylinders, the author carried out a study on the current running-in specifications of Dongfeng 4B diesel locomotive engine through simulation tests. In the tests, after analyzing the state parameters in the running-in process, the author proposed a new test procedure, modified running-in specifications, for the running-in process of cylinders. The new specifications proposed was applied to the running-in test on a practical locomotive diesel engine, and the difference between the topographies of the inner surface of a cylinder was analyzed before and after the running process to estimate the effect of the new procedure. The results show that the running-in time with the new procedure is about 37% shorter than that of the current running-in specifications.