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:
Feb. 26, 2013
Filed:
Sep. 08, 2010
Francesco Cianflone, Turin, IT;
Morena Bruno, Turin, IT;
Nando Vennettilli, Turin, IT;
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A method is provided for the diagnosis of the EGR cooler efficiency in a Diesel engine that includes but is not limited to construction of a model for determining the temperature drop y=ΔT in the EGR cooler, the model having a parameter vector θ and an input vector x; performing a model calibration phase in order to estimate the bias hof the system; calculation of a set of primary residuals ε(θ, x, ΔT), staffing from the model equation and using the results of the calibration phase; calculation of a set of improved residuals ε(θ): where N is the number of samples on which the diagnostic test is performed; calculation of a diagnostic index S:εand, use of the diagnostic index S in order to diagnose the efficiency of the EGR cooler.