Tribological Behavior among Piston Ring -Hydrorefined Mineral Oil- Cylinder Liner for Diesel Engine

Abstract:

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.

• Periodical: Applied Mechanics and Materials (Volumes 148-149)
• Pages: 1307-1311
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.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

References

[1] S.Z. Wen, P. Huang: Principles of tribology (Tsinghua University Press, Beijing 2002).

[2] S.Z. Wen, P.R. Yang: Elastohydrodynamic lubrication (Tsinghua University Press, Beijing 1992).

[3] P.R. Yang: Numerical analysis of fluid lubrication (National Defense Industrial Press, Beijing 2002).

[4] S.Z. Wen: Nano-tribology (Tsinghua University Press, Beijing 1998).

[5] C.H. Zhang: Tribo. Int. Vol.38 (2005), p.443–448

[6] N.W. Bolander, B.D. Steenwyk, F. Sadeghi and G.R. Gerber: Proc. IMechE Part J: J. Engineering Tribology Vol. 219 (2005), pp.19-31

[7] J.B. Luo, C.H. Zhang, S.Z. Wen: E. & S. Vol.5 (2003), pp.84-89

[8] S.M. Hsu, R.S. Gates: Tribo. Int. Vol.38 (2005), p.305–312

[9] T. Haque, A. Morina, A. Neville: Tribo. Int. Vol.40 (2007), pp.1603-1612

[10] G. Stachowiak, A.W. Batchlor: Engineering Tribology (Butterworth Heinemann 2005).

[11] F.T. Barcroft, R.J. Bird, J.F. Hutton, D. Park: Wear, Vol.77 (1982), p.355–384

[12] F.P. Bowden, J.N. Gregory and D. Tabor: Nature, Vol.156 (1945), pp.97-98

[13] H. Fujita and H.A. Spikes: Proc. IMechE Part J: J. Engineering Tribology Vol. 218 (2004), pp.265-277