某型天然气发动机机油耗问题改进与评价方法研究  

Research on Improvement and Evaluation Method of Oil Consumption of a Natural Gas Engine

作　　者：钱立宏 王强 程前峰 章泽强 QIAN Lihong;WANG Qiang;CHENG Qianfeng;ZHANG Zeqiang(Y&C Engine Co.,Ltd.,Wuhu 241080,China)

机构地区：[1]玉柴联合动力股份有限公司,安徽芜湖241080

出　　处：《内燃机》2024年第1期45-49,共5页Internal Combustion Engines

摘　　要：针对某型天然气发动机短里程机油耗高问题进行排查和分析,发现主要原因在于活塞环与缸套的初期磨合不佳,并且耐负压窜油能力较弱,导致缸内机油上窜并参与燃烧。通过优化活塞环与活塞环槽的配合,提高环槽加工精度,增加环槽回油通道,同时调整活塞环外圆面镀层,问题得到了有效的解决。此外,针对国六天然气发动机在部分负荷和怠速工况下进气道负压较大的问题,提出了一种机油耗评价方法,该方法可以准确评估各种实际工况下的机油耗水平。In response to the high oil consumption problem of a certain natural gas engine during short mileage,troubleshooting and a-nalysis revealed that the main cause was poor initial running-in between the piston ring and cylinder liner,as well as weak resistance to negative pressure oil leakage,which led to oil upwelling in the cylinder and participating in combustion.By optimizing the fit be-tween the piston ring and the piston ring groove,improving the machining accuracy of the ring groove,adding a return oil channel to the ring groove,and adjusting the coating on the outer cylindrical surface of the piston ring,the problem was effectively solved.In ad-dition,in response to the problem of high negative pressure in the intake port of a natural gas engine under partial load and idle condi-tions,an evaluation method for oil consumption was proposed.This method can accurately evaluate the oil consumption level under va-rious actual working conditions,providing a reference for further design optimization.

关 键 词：机油消耗 活塞环磨损 优化设计 试验验证 

分 类 号：TK413[动力工程及工程热物理—动力机械及工程]