THERMALLY STRATIFIED REGENERATIVE COMBUSTION CHAMBER AND METHOD FOR MODIFYING A COMBUSTION CHAMBER IN AN INTERNAL COMBUSTION ENGINE AND RESULTING ENGINE

摘要

A heat retaining element (20) is provided which is configured to be provided between a head (11) and a main combustion chamber (18) of an internal combustion engine the combustion chamber (18) of the engine being arranged between a head (11) and a reciprocating piston (54). The heat retaining element (20) is configured to reduce heat transfer from the main combustion cha mber (18) into the engine head (11). The heat retaining element (20) is a self supporting structure coupled to the head (11) the heat retaining element (20) including a head facing portion (43) substantially corresponding in shape to a portion of the head (45) facing t he main combustion chamber (18).