EXHAUST GAS TREATMENT

摘要

Apparatus for reducing NOx in the exhaust gasses of a vehicle has a housing (102) connectable inline in the exhaust system and provided with a reaction vessel within a vertical section (108). The reaction vessel has an inlet (110) for the supply of aqueous urea and an outlet (112) for removal of gaseous hydrolysis product. The outlet (112) is connected to a reservoir (200) which provides the NOx containing exhaust gas with the required amount of hydrolysis gas via a conduit (114) to pass therewith through an SCR catalyst to reduce the NOx content. The reservoir (200) includes a temperature sensor (210) to monitor the temperature within the reservoir (200) and a heating element (208) operable to heat the reservoir (200) in response to the temperature sensed by the temperature sensor being below a predetermined temperature.