Patent ID: 6526746
Filing Date: 2003-03-04
Classification: F01N,Y02A,Y02T

Abstract:
An on-board reductant delivery assembly for an exhaust line of an internal combustion engine powered motor vehicle comprising:a nozzle for atomizing delivery of said reductant into said exhaust line; a transfer tube connected with said nozzle for delivering said reductant; a housing having an outlet fluidly connected with said transfer tube opposite said nozzle, said housing having a front end forming a mixing chamber and a main body with an inlet for pressurized air and an inlet for reductant; and an electrically powered metering pump positioned within a sealed control volume of said housing for delivering reductant to said mixing chamber, said metering pump having an outlet connected with said housing mixing chamber, said metering pump being cooled or warmed by pressurized air delivered into said pressurized air inlet and turbulently encircling said metering pump, and said metering pump having an inlet connected with said housing reductant inlet.