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. 27, 2014
Filed:
Sep. 09, 2010
Lawrence O. Murray, White Lake, MI (US);
David R. Staley, Flushing, MI (US);
Kevin J. Storch, Brighton, MI (US);
Colin S. Yager, Pinckney, MI (US);
Morena Bruno, Chivasso, IT;
Lawrence O. Murray, White Lake, MI (US);
David R. Staley, Flushing, MI (US);
Kevin J. Storch, Brighton, MI (US);
Colin S. Yager, Pinckney, MI (US);
Morena Bruno, Chivasso, IT;
Abstract
A control system includes an oil pump module and a diagnostic module. The oil pump module, based on engine operating conditions, selectively generates a first mode request signal to initiate a first transition from operating an oil pump of an engine in one of a first pressure mode and a second pressure mode to operating the oil pump in another one of the first pressure mode and the second pressure mode. The second pressure mode is different from the first pressure mode. The diagnostic module, based on when a driver starts the engine, selectively generates a second mode request signal to initiate consecutive transitions from operating the oil pump in the second pressure mode to operating the oil pump in the first pressure mode. The diagnostic module diagnoses a pump fault when a first oil pressure change associated with the consecutive transitions is less than a first predetermined pressure change.