Piston for diesel type internal combustion engine, has top side and cavity including inlet opening, where ratio between area of inlet opening and area of top side of piston is less than specific value

摘要

The piston has a top side (32), and a cavity (34) including an inlet opening (54) and constituting the lower part of a combustion chamber whose top part is delimited by a cylinder head of an internal combustion engine. The contour of the inlet opening is circular and centered on an axis of the piston. The ratio between an area (A1) of the inlet opening and an area (A2) of the top side of the piston is less than 0.5. Independent claims are also included for the following: (A) an internal combustion engine including a piston (B) a process for controlling an internal combustion engine.