Patent ID: 7721542

Claim:
A mixer comprising: a cylindrical wall having a center axis; a substantially tubular wall defining a volute oriented about the center axis; an inlet to the volute to receive exhaust gas; an exit from the volute provided by one or more openings in the cylindrical wall wherein the volute imparts a tangential velocity component to the exhaust gas exiting the volute; a mount to mount the mixer to an air inlet to a radial compressor wherein the tangential velocity component imparted by the orientation of the volute is in the intended direction of rotation of a compressor wheel of the radial compressor to reduce the angle of incidence of the air and the exhaust gas at the leading edges of inducer blades of the compressor wheel and wherein the one or more openings of the exit from the volute are configured to direct the exhaust gas exiting the volute axially away from the compressor wheel at an angle less than 90° to the cylindrical wall to enhance mixing of air and exhaust gas; and an adjustable component positioned adjacent to the one or more openings to alter velocity of the exhaust gas exiting the volute by partially or entirely closing the one or more openings.