Effect of temperature on the lubrication characteristics between the piston ring and the cylinder liner of internal combustion engine
- Utsunomiya Univ., Tochigi (Japan). Dept. of Technology Education
One technology for the advancement of efficiency of an internal combustion engine is to reduce the mechanical friction power loss on lubricated surfaces of the engine. For the attainment of higher efficiency of the engine, the minute investigation of lubrication characteristics and the various improvements are indispensable. The effect of temperature on the lubrication characteristics between a piston ring and a cylinder liner is studied by using Reynolds equation and energy equation in which the heat generated from the viscous dissipation. The oil film temperature between the ring and the liner is affected by the ring and the liner temperatures and viscous dissipation. Viscous dissipation is affected by the viscosity of oil film, the velocity of ring and the oil film thickness between the ring and the liner. The viscosity of the oil film between the ring and the liner is evaluated by the oil film temperature and it decreases with the increase of the oil film temperature for the viscous dissipation. The lubrication characteristics, that is the oil film thickness and the friction force, are affected largely by the viscosity of the oil film. Under the condition of viscosity varied with temperature, the oil film thickness and the friction force are lower than those under the condition of constant viscosity except the position near TDC in a cycle, because the oil film viscosity decreases with the increase of piston speed and the oil film temperature rise. It is very important to consider the thermohydrodynamic lubrication for the analysis of the lubrication characteristics between the piston ring and the cylinder liner in the internal combustion engine.
- OSTI ID:
- 541026
- Report Number(s):
- CONF-9610275-; ISBN 0-7918-1516-1; TRN: IM9747%%132
- Resource Relation:
- Conference: 18. annual fall technical conference of the ASME Internal Combustion Engine Division, Fairborn, OH (United States), 20-23 Oct 1996; Other Information: PBD: 1996; Related Information: Is Part Of Tribology and lubrication: Volume 2. Proceedings of the 18. annual fall technical conference of the ASME Internal Combustion Engine Division; ICE-Volume 27-2; Caton, J.A. [ed.] [Texas A and M Univ., College Station, TX (United States)]; PB: 102 p.
- Country of Publication:
- United States
- Language:
- English
Similar Records
Modeling the lubrication, dynamics, and effects of piston dynamic tilt of twin-land oil control rings in internal combustion engines
Advanced Natural Gas Reciprocating Engine: Parasitic Loss Control through Surface Modification