RU94031580A - Device to increase service life of upper compression piston ring and piston of four-stroke internal combustion engine (or compressor) - Google Patents

Abstract

FIELD: mechanical engineering. SUBSTANCE: shaped circular groove is made in cylinder liner over its perimeter from piston side. Groove is located at level of end face surface of compression piston ring with piston in top dead center. Width of groove corresponds to value of maximum summary clearance in mating of piston and pin, pin and connecting rod, connecting rod and crankshaft. Depth of groove corresponds to value of maximum tolerable wear of cylinder liner in working zone. Upper and lower walls of circular groove are made inclined. EFFECT: increased service e life owing to reduction of wear of first compression piston ring and upper groove of piston.

Claims (1)

The invention relates to the field of mechanical engineering, namely to the field of engine manufacturing, and can be used in four-stroke internal combustion engines (or compressor) to increase the resource of the piston and the upper piston compression ring. The use of the proposed device increases the resource by reducing wear on the first piston compression ring and the upper groove on the piston. In the proposed device, in the body of the cylinder liner on the piston side around the perimeter, there is a curved annular groove located at the end surface of the piston compression ring at its position at top dead center (bm), the width of which corresponds to the maximum total clearance of the mating between the piston and the finger, the finger and the connecting rod, the connecting rod and the crankshaft, and the depth of this annular groove corresponds to the maximum allowable wear of the cylinder liner in the working area, at m upper and lower walls of the annular groove are inclined.