Piston engine i.e. internal combustion engine such as gasoline engine, for motor vehicle, has magnet arranged such that magnet cooperates with piston ring, so that piston ring is held in contact with groove surfaces

摘要

The engine has a piston ring (8) arranged in a piston ring groove (7) that is formed in a piston (6), where the piston is movably arranged in a cylinder (5) and comprises two groove surfaces (23, 24). A magnet is arranged such that the magnet cooperates with the piston ring, so that the piston ring is held in contact with the groove surfaces. The groove surface (23) is formed in the direction of a longitudinal axis (11) between an upper base surface (12) and the groove surface (24).