Abstract
The main node piston-pin-piston rings are most responsible for the formation of mechanical losses. It is advisable to reduce friction losses in the piston-cylinder group lead to an increase in the overall efficiency of the engine and thus reduce the fuel consumption. One way of achieving these objectives is modification of microgeometry of the piston bearing surface which cooperates with the cylinder wall. In this paper the results of simulation for the stepped microgeometry piston bearing surface are presented.
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