基于倒拖法检测活塞环气密性的试验方法

Detecting Piston Ring's Air Tightness by Motoring Test Method

以单缸柴油机为研究对象,针对发动机实际使用环境下活塞环气密性的测试方法进行分析探讨。采用倒拖法对不同转速下安装不同结构活塞环的单缸机进行了气缸内压力测试,得到了压缩压力测试结果,从而可判断活塞环气密性的优劣。试测结果表明本方法可行,测试结果稳定。

In this paper, single-cylinder diesel engine was taken as the study object, the piston ring tightness test methods under the actual use environment of the engine were analyzed, the in-cylinder pressure was tested using motoring test method at different speeds, the pressure curves were obtained. The test results can be used to evaluate the quality of the piston ring air tightness. Test results show that the method is feasible, the test results are stable.