REDUCING FRICTION LOSSES IN (PRA) SYSTEM OF AN I.C ENGINE
Keywords:
(P.R.A) system, IC engine, piston ring, friction losses, pulley, electric motor, tachometerAbstract
The tribological scope is focus upon the major frictional components of the automobile engine e.g.: piston ring assembly
(PRA). The current position surrounding the modeling of this component will be reviewed and future possibilities identified. The
frictional losses are in the PRA vary from 45% to 55% of total frictional losses. To reduce these frictional losses, various
parametric approaches are made particularly at design stage and at experimental level. PRA friction is very complex phenomena
under dynamic condition. Proper lubrication and selection of material pair also contributes to PRA friction. The theoretical
model for PRA friction is being developed by considering different variables. These models are developing either theoretically or
experimentally. The models are for specific PRA system with different capacity.
The friction force between piston ring and cylinder liner is measured on available an experimental setup-motored driven test ring
for single cylinder 150cc piston-cylinder assembly.Graps are plotted between engine speeds and crank angle v/s friction force and
engine speed.
