Tribological Behavior among Piston Ring -Hydrorefined Mineral Oil- Cylinder Liner for Diesel Engine
(0) With a piston ring reciprocating liner test rig, the tribological behavior at top dead center of diesel engine was evaluated between hydrorefined mineral oil (HMO) and two kinds of cylinder liner/piston ring, chromium-plated+honing/physical vapor deposition (CP/PVD) and boron-phosphrous alloy cast iron+honing/physical vapor deposition (CI/PVD). Friction coefficient vs. temperature at different loads was used to discriminate the principal function of tribofilm. The analysis shows that the interface between CP/PVD and HMO was subject to thin film lubrication with stearic acid at 70-150°C. When the temperature exceeds 150°C, zinc dialkyl dithiophosphate (ZDDP) began to change the friction status of interface. However, the steady boundary lubrication of CI/PVD exists from 50—250°C at different loads and can not distinguish the scope of additives effects. The reason can be attributed to the chemical reactivity of chromium and iron with the HMO. The soluble Fe2+ or Fe3+ of CI/PVD maybe played an important role in the tribofilm activation level. The understanding provides friction pairs selection at definite lubrication oil and a design guideline for boundary films.
cylinder liner piston ring additives tribological behavior
Shen Yan Xu Jiujun Jin Mei Wang Jianji Wang Liang Han Xiaoguang Zhang Hongpeng Zhang Yindong
Marine Engineering College, Dalian Maritime University, Dalian, China Transportation & Logistics Engineering College, Dalian Maritime University, Dalian, China
国际会议
大连
英文
1307-1311
2011-10-19（万方平台首次上网日期，不代表论文的发表时间）