Title:
METHOD FOR DETECTING THE DEFECTIVE OPERATION OF A PARTICULATE FILTER OF A POLLUTION CONTROL SYSTEM
Document Type and Number:
WIPO Patent Application WO/2011/107686
Kind Code:
A9
Abstract:
The invention relates to a method for detecting the defective operation of a particulate filter of a pollution control system of a heat engine, said particulate filter being impregnated with a catalyst enabling the reduction of nitrogen oxides NOx and a NOx sensor located downstream of said particulate filter for the detection of NOx that have not been reduced by said catalyst, and/or ammonia. According to the invention, the data (52) supplied by the NOx sensor is used to diagnose a defective operation of the particulate filter. The data supplied by said sensor can be the variation (53) of the characteristics of conversion of NOx by said catalyst.
Inventors:
TRONEL FREDERIC (FR)
Application Number:
PCT/FR2011/050294
Publication Date:
November 29, 2012
Filing Date:
February 11, 2011
Export Citation:
Assignee:
PEUGEOT CITROEN AUTOMOBILES SA (FR)
TRONEL FREDERIC (FR)
TRONEL FREDERIC (FR)
International Classes:
B01D53/94; F01N3/035; F01N11/00; F01N13/00
Attorney, Agent or Firm:
MENES, Catherine (Propriété Industrielle - LG08118 rue des Fauvelles, La Garenne Colombes, FR)
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