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:
Oct. 20, 2009
Filed:
Jun. 16, 2005
Bernard Dionnet, Morigny Champigny, FR;
Stephane Cochet, Saint Jean de Braye, FR;
Karim Guenounou, Saint Maur, FR;
Marc Guyon, La Norville, FR;
Laurent Leprieur, Limours, FR;
Bernard Dionnet, Morigny Champigny, FR;
Stephane Cochet, Saint Jean de Braye, FR;
Karim Guenounou, Saint Maur, FR;
Marc Guyon, La Norville, FR;
Laurent Leprieur, Limours, FR;
Renault S.A.S., Boulogne Billancourt, FR;
Abstract
The invention concerns a method which consists in arranging a oxygen probe () of an exhaust pipe and observing that substantial unique increase of said representative signal towards a threshold value Scalculated from the start of the bleeding of the nitrogen oxide trap, obtained following a variation subsequent to shift of the engine from lean mixture operating conditions to rich mixture operating conditions, being used as indicator for controlling the end of the bleeding operation. The invention is characterized in that the integration of the signal representing the time between the start of the bleeding and the end of the bleeding, then the comparison of the integration value to a threshold value Sare used for diagnosing its ageing condition. The invention also concerns a device for implementing said method.