STRUCTURE FOR RESTRICTING INDEPENDENT ROTATION OF SIDE RAIL BY CONTACTING SIDE RAIL OF OIL RING TO EXPANDER FIRMLY

摘要

Purpose: a structure, the rotation of a guide rail for preventing an oil ring are arranged to limitation and pass securely that contact guide rail is to expander, by preventing the abrasion of oil ring from improving the durability of engine. Construction: an oil ring is inserted into the ring groove formed among the outer peripheral edge on the top of piston and collects oil in terms of a reciprocal piston in a cylinder, forms sealed combustion chamber by a roof rails (34) and the lower (side) rail (36) formed among the upper and lower part of an expander (32). Scattering from rough surface (32a, 34a, 36a) is formed in the contact portions of the expander and roof rails and lower (side) rail that improve surface contact force, and slot and soil are continuously formed unprocessed surface. Fuel consumption is reduced from the malfunction of oil ring.