Patent ID: 6763658
Filing Date: 2004-07-20
Classification: B01D,F01N,F02D,Y02A

Abstract:
System for helping to regenerate a catalyzed particulate filter arranged in a motor vehicle diesel engine's exhaust line, said filter being positioned downstream of an oxidation catalyzer on the output side of the engine, wherein the system includes a gas bypass circuit parallel to the terminals of the catalyzer and fitted with means of controlling the circulation of the gases therein and in the catalyzer, that, at the point when regeneration of the particulate filter is cyclically triggered, triggers diversion of a proportion of the gases laden with unburned hydrocarbons into the particulate filter without passing via the catalyzer, so as to speed up the regeneration of the particulate filter, wherein the unburned hydrocarbons are obtained by post-injecting fuel into the engine's cylinders or into the exhaust line.