Piston for combustion chamber of diesel combustion engine of motor vehicle, has peripheral part forming torus, and bowl whose plain part constitutes bottom of bowl, which surrounds central part and connects central part to peripheral part

摘要

The piston (1) has a bowl (2) formed with a cavity and including a central part (7) in elevation. A peripheral part (13) forms a torus. The bowl includes a plain part (8) constituting bottom of the bowl, which surrounds the central part and connects the central part to the peripheral part. The plain part is in shape of crown and presents constant radial length (L) that is appreciably equal to radius (R) of the torus of the peripheral part. A locking ring (3) is arranged at upper periphery of the bowl.