Patent ID: 6526752
Filing Date: 2003-03-04
Classification: F02B,F02D,F02M

Abstract:
A passive engine exhaust flow restriction arrangement, comprising:a turbocharger having a turbine defining a turbine inlet operable to receive exhaust gas produced by an internal combustion engine and a turbine outlet operable to expel engine exhaust gas therefrom; a first engine exhaust conduit in fluid communication with said turbine inlet and defining a third cross sectional flow area therethrough; an EGR conduit fluidly coupled between said first engine exhaust conduit and an intake manifold of said engine, said EGR conduit supplying recirculated exhaust gas to said intake manifold; a second engine exhaust conduit in fluid communication with said turbine outlet and defining a first cross sectional flow area therethrough; and a passive flow restriction member disposed in line with either of said first and second engine exhaust conduits downstream of said EGR conduit and defining a second fixed cross sectional flow area therethrough less than either of said first and third cross sectional flow areas, said second cross sectional flow area sized to reduce an operational efficiency of said turbine to thereby allow increased flow of said recirculated exhaust gas through said EGR conduit.