Engine piston

The utility model discloses an engine piston, including the piston only, be formed with on the lateral wall of piston only head along the ring groove of piston only circumference setting, ring groove's degree of depth direction is unanimous with the radial direction of piston only ring groove's fixed the inlaying of opening part has the shutoff of being used for ring groove open -ended plugging ring, by the component of the ring groove inner space behind plugging ring shutoff opening piston cooling passage, be formed with on plugging ring's the lateral wall along the ring groove of plugging ring circumference setting, the utility model discloses the long -time stable work of piston has been guaranteed to effective degree of difficulty that reduces processing piston cooling cistern, has improved the leakproofness of piston, has lengthened the life of piston. 本实用新型公开了种发动机活塞，包括活塞本体，在活塞本体头部的外侧壁上形成有沿活塞本体周向设置的环形卡槽，所述环形卡槽的深度方向与活塞本体的径向方向致，在所述环形卡槽的开口处固定镶嵌有用于封堵环形卡槽开口的封堵环，被封堵环封堵开口后的环形卡槽内部空间构成活塞冷却液通道，所述封堵环的外侧壁上形成有沿封堵环周向设