Piston scuffing is one of the destructive faults in internal combustion (IC) engines. There are different causes to make this fault that lack of lubricant is the most important one among them. The purpose of this paper is the quantitative study of the piston scuffing effects on the engine performance parameters which is a new research direction in the IC engine filed. For this reason, several e...

A running-in and starved lubrication experiment is designed to investigate the heavy-duty scuffing behavior of piston ring coatings against cast iron (Fe) cylinder liner using the piston ring reciprocating liner test rig. The scuffing resistance of the piston ring with the chromium-based ceramic composite coating (CKS), and that with the thermally sprayed nickel-chromium-molybdenum coating (NCM...

Scuffing is a localized damage process caused by sudden failure of the lu- bricating film in sliding contact. It associated with an important increase temperature, friction and vibration. For piston-ring cylinder-liner (PRCL) contact, it can lead to complete engine failure. shown this paper, that temperature gradient generated contact induces thermal Marangoni effect. The latter might then lack...

This article presents the results of research into causes wear piston pin mounted in bosses by means a hinge joint and connecting rod small end thermocompression bond. Changes geometry pin-top surface structure, which are caused mutual influence mating surfaces variable lubrication conditions, presented. The progress scuffing as result insufficient elements or oil film breaking is demonstrated....

As worldwide automotive ownership is set to exceed 2 billion vehicles by 2030 [1], environmental and economical pressures on the automotive industry mean there is a trend to reduce harmful greenhouse gas emissions whilst simultaneously improving fuel economy. The use of electrical hybrid, start-stop idling and materials light-weighting are some of the technological solutions which can offer eff...

Abstract The friction and wear properties, as well the scuffing resistance, of different piston-ring coatings mating with a chrome-plated cylinder liner were investigated. Interrupted tests under lubricant starvation condition conducted to examine behavior Cr-diamond coating (GDC) diamond-like (DLC). results indicated that DLC had outstanding tribological properties (small coefficient loss) at ...

The plasticity index has often been invoked as an indicator of the most likely condition for scuffing of metals. The particular condition for initiating scuffing was thought to be 2% plastic strain in contacting asperities, which would lead to adhesion between asperities. E~eriments were done to validate the hypothesis using low alloy steels and stainless steel, lubricated with plain mineral oi...

The diversity of multidisciplinary approaches suggests that fundamentals of scuffing require systemic, complex multi-scale and multi-physics analysis of an irreversible process as it is postulated in present study. That is probably one of the reasons of lack of unequivocal model of this irreversible transitional process from stable more or less lubricated wear to scuffing described only by one ...