Patent ID: 6536404
Filing Date: 2003-03-25
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 combustion chamber having a center portion being elevated relative to a bottom plane of the combustion chamber, the center portion being defined at least in part by a portion of a convex sphere, the sphere having a radius and an origin, the origin of the radius lying on a piston central axis and the combustion chamber further having an outwardly radially disposed bottom margin, the bottom margin being defined in part by a portion of a concave sphere, the sphere having a radius and an origin, the origin of the radius lying on the piston central axis and the bottom margin radius being greater than the center portion radius; and the combustion chamber having a plurality of curved surfaces having smooth transitions between adjacent smooth surfaces, the smooth surfaces including the spherical center portion and the spherical bottom margin and the annular sidewall surface.