Abstract:
An optimum design of an automobile engine is of crucial importance to automobile
industry for both civil and defense applications. In automobile systems, an engine is
considered to be the heart of an automobile and affects the overall performance of a
vehicle. Passenger cars and commercial vehicles have mechanically operated engine
driven oil pumps to lubricate all critical moving components of an engine. The main
aim of a lubricant is to reduce/ minimize all forms of friction and wear during normal
engine operation leading to a smooth operation and to enhance life of an automobile
engine. The sliding motion of piston and its rings (slider bearings) accounts for 45% of
total friction and wear in an engine. A piston in a cylinder cannot seal the cylinder
effectively. This job is done by the piston rings. Properly constructed and fitted rings
rub against the cylinder wall with good contact all around the cylinder. Rings ride in
grooves that are cut into the piston head. In this research work, modeling and simulation
of Elastohydrodynamic (EHD) lubrication film regime between rings and engine
cylinder walls will be carried out to evolve an optimum design through parametric
studies. The predicted results would be compared with those based on experimental
investigation.
