Directly injected internal combustion engine piston, has cavity with two zones extending on respective angular sectors, where zone profiles in respective half-plane sections, delimited by common axis, are different from each other

摘要

The piston (10) has a cavity (22) at its front face to delimit an inner part of a combustion chamber. The cavity has two zones (32, 34) that are extended on two respective angular sectors. The angular sectors are centered on a common axis (B), parallel to a piston axis (A). The profiles of the zones in respective half-plane sections, delimited by the common axis, are different from each other.