Patent ID: 7552722

Claim:
An exhaust gas recirculation (EGR) device comprising: a mixing pipe having an air inlet port disposed at one end of the mixing pipe; an outlet port disposed at an opposite end of the mixing pipe; an exhaust inlet port disposed at a region of the mixing pipe between the air inlet port and the outlet port, wherein the exhaust inlet port is configured to deliver exhaust to be mixed with air inside the mixing pipe; and a diffuser nozzle comprising an outwardly tapering cross section disposed coaxially within a region of the mixing pipe between the exhaust inlet port and the outlet port, the diffuser nozzle further comprising a closed first end adjacent a region of the mixing pipe defined by the exhaust inlet port, an open second end opposite the first end and adjacent the outlet port, and at least one opening disposed in the side of the diffuser nozzle, an outer mixing channel disposed in the spacing between the diffuser nozzle and the mixing pipe; and a central mixing channel disposed adjacent the at least one opening of the diffuser nozzle and extending through at least a portion of the diffuser nozzle.