Patent ID: 6467260
Filing Date: 2002-10-22
Classification: F01N,Y10T

Abstract:
An exhaust system for an internal combustion engine which comprises:a flange adapted to be secured to exhaust ports of an internal combustion engine; three openings through said flange, each adapted to align with an engine exhaust port; three primary pipes secured at their first ends to said flange at said openings; a collector pipe surrounding the second ends of said primary pipes; the second ends of said pipes lying substantially parallel and in contact with each other, substantially equally spaced around the collector pipe centerline and having end surfaces substantially in a single plane defining a central area between the pipe ends; a transition piece having an essentially pyramidal shape; the base of said pyramid covering the area between the primary pipe ends and secured to said pipe end surfaces; said collector pipe having an entrance internal cross section with the transition piece at said pipe ends substantially equal to the combined internal cross sections of said primary pipe ends; said collector pipe gradually reducing in internal cross section over its length; and means at the exit of said collector pipe for connection to an exhaust pipe.