Turbocharger module for internal combustion engine

Claim 1

A turbocharger for an internal combustion engine comprising: a one-piece housing; an upwardly directed intake port and a downwardly directed discharge surface in said housing; first and second standard carburetor flanges around said intake port and discharge surface, respectively, so that a carburetor may be mounted directly thereon to feed an air/fuel mixture therein, and said housing may be mounted on the intake manifold of an internal combustion engine to discharge therein; means in said housing forming a flow passage extending downward from said intake port in the configuration of a U-trap terminating in a horizontal outlet duct opening through one end of said housing; a compressor delivery passageway in said housing extending upward from said outlet duct and then around it to a bottom port opening through said discharge surface; a wall closure on said one end of the housing; a horizontal shaft rotatable in said wall; a turbine compressor on said shaft on the inside of said wall and disposed coaxially within said horizontal outlet duct; a turbine impeller on said shaft on the outside of said wall; a turbine housing on the outside of said wall and containing said impeller; an inlet port in said turbine housing adapted to be connected to the exhaust manifold of an internal combustion engine; a bypass port in said housing opening from the lowest level of said U-trap flow passage through said discharge surface; a shut-off valve in said bypass port; and means operative to open said shut-off valve at low engine loads.