Patent ID: 8418449

Claim:
A variable exhaust gas flow deflector for an internal combustion engine comprising: a plurality of blades located at least partially within exhaust gas piping having a cylindrical wall; each of said plurality of blades made from a bi-metallic material, said bi-metallic material having a first material with a first coefficient of expansion and a second material with a second coefficient of expansion, said first coefficient of expansion not being equal to said second coefficient of expansion; each of said plurality of blades having a first straight position and a second bent position, and also operable to bend between said first straight position and said second bent position as a function of an exhaust gas temperature within said exhaust gas piping, each of said plurality of blades being spaced a predetermined distance from said cylindrical wall to permit full flow of an exhaust gas when each of said plurality of blades is in said second bent position and provide for at least one of a uniform temperature distribution and a uniform mixing of the full flow of the exhaust gas across an entire cross section of said exhaust gas piping when the exhaust gas is passing through said exhaust gas piping by swirling the exhaust gas as it passes through said plurality of blades; each of said plurality of blades also extending from a central location of said exhaust gas piping outwardly to said predetermined distance from said cylindrical wall.