Internal Combustion Engine Piston Ring - Cylinder Liner Friction Process

The paper is mainly focused on the friction process between piston ring andcylinder when piston moving back and forth with cylinder. The friction between pistonring and cylinder is the primary factor of engine's power loss. So, it is much meaningful to cut down the friction between piston ring and cylinder. Piston ring, which is apt to be worn out, is the key part of engine. The tribological character of piston ring and cylinder affects the capability of engine.Firstly, this paper discuss some fundamental theory and research ways about tribology and especially about friction between piston ring and cylinder. Then, this paper deeply studies the specialty and affective factors of friction between piston ring and cylinder. By studying the requirement of this experiment, I took drill machine as the base-table and the power, and then designed an experiment equipment that is can be used to research the friction process between piston ring and cylinder when piston moving back and forth with cylinder. The equipment can provide several friction experiments with different conditions such as variable load, variable revolving velocity, variable lubricant statement and friction parts. On the basis of experimental data, the character of the friction process between piston ring and cylinder and the factors which affect the friction process and power loss of piston and cylinder have been studied. These factors include the load and the material. At the same time I acquired some conclusions which will be useful for some people to do those tribological design.