...Zhenpeng He; Wenqin Gong; Weisong Xie; Guichang Zhang; Zhenyu Hong Purpose Piston ring dynamic problem plays an important role in the lubricant characteristics of a reciprocating engine, which lead to engine wear and the increased consumption of lubricating oil. A cavitation analysis of the piston...

...Zhaoju Qin; Chenheng Yuan; Yanpeng Yuan; Yuanyuan Huang Purpose A free-piston engine (FPE) is an unconventional engine that abandons the crank system. This paper aims to focus on a numerical simulation for the lubricating characteristics of piston rings in a single-piston hydraulic free-piston...

...Yali Zhang; Xiaogang Zhang; Tonghai Wu; You-bai Xie Purpose – The piston ring-cylinder liner pair is one of the most important tribological systems of an internal combustion engine. The friction loss of the piston ring-cylinder liner pair accounts for the largest portion of total efficiency...

... lubricant (phosphorus containing) and mercapthocarboxylate containing non-phosphorus and non-ash crankcase oil. Lubricants were tested under identical operating conditions for 100 hrs. The surfaces of cylinder liner and piston rings were inspected through optical microscopy, scanning electron microscopy...

...Jun Cheng; Xianghui Meng; Youbai Xie; Wenxiang Li Purpose – The purpose of this paper is to study the real-time change of surface roughness at different small regions of piston rings during running-in process. Meanwhile, the effects of real-time change of the rough surface topography...