Patent ID: 7730878
Filing Date: 2010-06-08
Classification: B01F,F01N,F02M,Y02T

Abstract:
1. An exhaust gas recirculation (EGR) mixing 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, and an exhaust feeder occupying a portion of the mixing pipe between the air inlet port and the outlet port, wherein the exhaust feeder comprises: a scroll mixing chamber disposed on the mixing pipe and configured to mix air and exhaust, the scroll mixing chamber comprising a plurality of openings operable for receiving exhaust at multiple locations; an open-ended exhaust inlet tube disposed on the mixing pipe and configured to deliver exhaust to the scroll mixing chamber, wherein the open-ended exhaust inlet tube receives exhaust at its one end and is coupled to the scroll mixing chamber at its opposite end; and a continuous curved exhaust feed splitter beam disposed lengthwise within a portion of the open-ended exhaust inlet tube and a portion of the scroll mixing chamber and defining a non-uniform thickness across its length, wherein the exhaust feed splitter beam splits the exhaust into first and second passages before entry into the mixing chamber, wherein the second passage defines a greater distance and comprises a wider opening than the first passage, and wherein the second passage defines a uniform passage diameter throughout.