Patent ID: 6513476
Filing Date: 2003-02-04
Classification: F02B,Y02T

Abstract:
A combustion chamber assembly for use in a diesel engine, comprising:a combustion chamber being defined in a crown of a piston, the piston having a central axis, the combustion chamber having a center portion being elevated relative to a bottom plane of the combustion chamber, the center portion being a continuous surface defined in part by a portion of a sphere, the sphere having a radius, the origin of the radius lying on the piston central axis and the combustion chamber further having an outer margin, the outer margin being defined in part by a portion of a sphere, the sphere having a radius, the origin of the radius lying on the piston central axis and being greater than the center portion radius; the spherical center portion and the spherical outer margin being connected by an annular surface; and the combustion chamber having a plurality of curved surfaces having smooth tangential transitions between adjacent smooth surfaces, the smooth surfaces including the spherical center portion and the spherical outer margin in combination with the annular surface.