Method and apparatus for reducing damage associated with detonation and/or destructive knock

摘要

A piston for attentuation of detonation in the combustion chamber of an internal combustion engine has a top wall accommodating a cap. The cap has a flush extension of the cylindrical portion of the side wall of the piston and a transverse wall projected generally upward from the top wall of the piston. The transverse wall has a convex curve with a radius center located along the outer edge of the top wall of the piston in contiguous relationship to the ignition point of the air/fuel mixture in the combustion chamber. The transverse wall of the cap is located generally normal to the direction and movement of the flame front commencing from the ignition point and provides an abrupt increase in the cross sectional area of the combustion chamber in the direction of travel of the flame front to attenuate detonation in the combustion chamber.