Modification for internal combustion engine providing improved fuel economy

Claim 1

An attachment in combination with an internal combustion engine, said attachment installed between a carburetor and an intake manifold of said internal combustion engine, said carburetor is equipped with a throat of specified diameter and said intake manifold has a mating opening to said carburetor, wherein an air-fuel mixture is delivered from said carburetor through said attachment to said intake manifold for distribution of said air fuel mixture through a number of passage means within said intake manifold to cylinders for combustion, said attachment comprising: a generally flat body with upper and lower parallel faces with passages therethrough which align with the throat of said carburetor and the mating opening of said intake manifold; a first seal, sealingly connecting the upper face of the attachment to a flanged bottom plate of said carburetor and a second seal, sealingly connecting the lower face of said attachment to a mating surface on said intake manifold; and including a tube which continuously injects fresh air into the intake manifold and is open to the atmosphere at one end and passes through a side wall of said attachment and transversely extends across the passages of said attachment and dead ends in one of said passages; said tube further comprises a downwardly directed tee shaped section for each passageway, the vertical section of each tee shaped section being connected to that portion of the tube which extends transversely across each passageway at the approximate center of each passageway, said tee shaped section having a pair of spaced openings at opposite ends of said tee shaped section cross arm and wherein said tee shaped section extends from said attachment to a point within the passage means of said intake manifold.