Tribological Behavior among Piston Ring -Hydrorefined Mineral Oil- Cylinder Liner for Diesel Engine
| Periodical | Applied Mechanics and Materials (Volumes 148 - 149) |
|---|---|
| Main Theme | Mechanical Engineering, Materials and Energy |
| Edited by | Grace Chang |
| Pages | 1307-1311 |
| DOI | 10.4028/www.scientific.net/AMM.148-149.1307 |
| Citation | Yan Shen et al., 2011, Applied Mechanics and Materials, 148-149, 1307 |
| Online since | December, 2011 |
| Authors | Yan Shen, Jiu Jun Xu, Mei Jin, Jian Ji Wang, Liang Wang, Xiao Guang Han, Hong Peng Zhang, Yin Dong Zhang |
| Keywords | Additive, Cylinder Liner, Piston Ring, Tribological Behavior |
| Price | US$ 28,- |
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℃. When the temperature exceeds 150℃, zinc dialkyl dithiophosphate (ZDDP) began to change the friction status of interface. However, the steady boundary lubrication of CI/PVD exists from 50—250℃ 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.
