New method to reduce frictional power consumption of piston ring in internal combustion engine

The frictional power consumption in piston ring group were analyzed. The changes of structure of piston ring were investigated. A new structure design of adopting a compress ring was put forward according to the problems and requirements faced to development of internal combustion engine now. The different frictional power consumptions of one and two compress rings were analyzed based on hydrodynamic lubrication theory and load equation of the ring. The results show that there are more reduction of frictional power consumption in one compress ring than two. The one compress ring of high quality can perform the function of seal and lubrication of two rings. The new method of structure design will help to push the lightweight process of internal combustion engine.