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:
Nov. 08, 2011
Filed:
Jan. 27, 2009
William L. Aldrich, Iii, Davisburg, MI (US);
Donald D. Crites, Washington, MI (US);
William L. Aldrich, III, Davisburg, MI (US);
Donald D. Crites, Washington, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A method includes diagnosing a transmission auxiliary pump in a hybrid electric vehicle (HEV) having an engine and an auxiliary power module (APM). A predetermined HEV operating mode is detected during which the engine is running, and the pump is cycled between on and off states. An electrical output value of the APM is determined during the on and off states. A control action is executed when the output value exceeds a corresponding threshold. An HEV includes an engine, a transmission, an APM, a battery connected to the APM, and a transmission auxiliary pump. An algorithm diagnoses operation of the pump. The APM includes an algorithm for diagnosing the pump during a predetermined mode during which the engine is running by determining an electrical output value of the APM during on and off states of the pump, and executes a control action when the output value exceeds a threshold.