Patent ID: 8549850
Filing Date: 2013-10-08
Classification: F01N,Y02T

Abstract:
1. An aspirator for cooling exhaust gas from an internal combustion engine, comprising: a nozzle section communicable in exhaust receiving communication with the internal combustion engine, the nozzle section comprising a plurality of nozzles through which an exhaust gas stream is flowable, wherein the plurality of nozzles are positioned laterally adjacent each other, each nozzle comprising an exhaust inlet end and exhaust outlet end, and wherein the nozzle section further comprises a nozzle manifold defining an outer periphery, the plurality of nozzles being coupled to and extending from the nozzle manifold, and wherein the plurality of nozzles define a collective outer periphery encompassing the plurality of nozzles, the collective outer periphery of the plurality of nozzles at the exhaust outlet end being smaller than the outer periphery of the nozzle manifold; an expansion section communicable in exhaust receiving communication with the plurality of nozzles, the expansion section comprising an expansion tube having an exhaust inlet end and an exhaust outlet end; a housing tube within which the nozzle section and expansion section are positioned; and an air entrainment section communicable in air supplying communication with the expansion section, the air being mixable with the exhaust gas within the expansion section, wherein the air entrainment section comprises a plurality of apertures formed in the housing tube; wherein the exhaust inlet end of the expansion tube is positioned downstream of the exhaust outlet ends of the plurality of nozzles such that an axial space is defined between the exhaust inlet end of the expansion tube and the exhaust outlet ends of the plurality of nozzles.