Patent ID: 9032710
Filing Date: 2015-05-19
Classification: F01N,Y02A

Abstract:
1. A diesel exhaust gas treatment module for a vehicle having a diesel oxidation catalyst in an exhaust pipe, the module comprising: a housing having a fuel inlet for receiving filtered fuel that has been diverted from a diesel engine to the fuel inlet, an air inlet attached to a source of filtered air, and an outlet; a dosing line fluidly connecting the outlet to a nozzle that vaporizes the fuel and is positioned to spray the fuel into the exhaust pipe upstream of the diesel oxidation catalyst, the nozzle receiving either fuel or air based upon an operational state of the module; a fuel shut-off valve and a diesel fuel dosing valve positioned at least partially within the housing and configured to supply fuel to the nozzle when the module is in a dosing operational state; and an air purge valve positioned at least partially within the housing and configured to supply air to the nozzle to purge fuel from the dosing line and the nozzle during an air purge operational state.