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. 10, 2006
Filed:
Jan. 31, 2005
Ludovic Peron, Villorceau, FR;
Guillaume Meissonnier, Landes le Gaulois, FR;
Claire Vermonet, Paris, FR;
Cédric Lorret, Paris, FR;
Ludovic Peron, Villorceau, FR;
Guillaume Meissonnier, Landes le Gaulois, FR;
Claire Vermonet, Paris, FR;
Cédric Lorret, Paris, FR;
Peugeot Citroen Automobiles SA, Velizy-Villacoublay, FR;
Delphi Technologies, Inc., Troy, MI (US);
Abstract
In the method of diagnosing the operating state of a motor vehicle diesel engine of the invention, the engine includes a pressure acquisition system associated with each cylinder of the engine to acquire the pressure in that cylinder, an engine shaft angle acquisition system adapted to deliver the crankshaft angle of each cylinder, and onboard correction system adapted to correct a predetermined set of malfunctions and drifts of the cylinders and the acquisition systems. The method includes an analysis step of analyzing the operation of each cylinder and the cylinder pressure and engine shaft angle acquisition systems by identifying an operating state of the set comprising that cylinder and those systems based on predetermined characteristics of the signal delivered by the cylinder pressure acquisition system, and a correction step of correcting identified malfunctions and drifts.