Patent ID: 8978611
Filing Date: 2015-03-17
Classification: F02B,F02F,Y02T

Abstract:
1. A piston for an internal combustion engine, comprising: a non-adiabatic region that includes a central portion of a piston upper surface, wherein the piston upper surface has an edge which is in contact with the piston wall, the non-adiabatic region being shaped like a strip extended from the edge on an intake side of the piston upper surface to the edge on an opposite exhaust side of the piston upper surface, the non-adiabatic region having no insulating layer; and an adiabatic region that is disposed on part of the piston upper surface that is positioned laterally relative to the non-adiabatic region, the adiabatic region having an insulating layer, wherein both an intake side end and an exhaust side end of the non-adiabatic region join together with a piston wall of the piston.