The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 10, 2011
Filed:
May. 15, 2006
Laurent Leprieur, Limours, FR;
Vincent Rouault, Montigny le Bretonneux, FR;
Cyril Pradeilles, Sucy en Brie, FR;
Laurent Leprieur, Limours, FR;
Vincent Rouault, Montigny le Bretonneux, FR;
Cyril Pradeilles, Sucy en Brie, FR;
Renault S.A.S., Boulogne Billancourt, FR;
Abstract
A method and device for detecting presence of an exhaust gas treatment system in an exhaust line of an internal combustion engine. The method determines the derivative of the temperature upstream of the treatment system, determines the derivative of the temperature downstream of the treatment system, and compares the downstream temperature derivative with a threshold value for detecting absence of the treatment system using a pre-determined upstream temperature derivative level.