Piston for IC engine - has several compression ring below which is oil scraper ring with pressure unloading holes leading from its groove to piston interior

摘要

Below the oil scraper ring, there is an oil catchment groove (10) with oil conduit holes leading to the piston interior, and arranged in each of the two quadrants in front of the piston pin face sides. The pressure unloading holes (7) are only provided in the central area of the two quadrants (a) in front of the piston pin long sides, the oil catchment groove (10) runs completely around the piston, and in each of the pressure unloading holes (7) is a section (9) of smaller dia. At least one pressure unloading hole (7), and at least one oil conduit holes (11) issue into a common discharge hole (8) running in the longitudinal direction of the piston, and leading to the space on the piston underside. USE/ADVANTAGE - IC engine piston in which a very adequate oil feed is ensured to the piston rings and to the piston exterior.