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. 14, 2012
Filed:
Feb. 25, 2009
William L. Aldrich, Iii, Davisburg, MI (US);
Steven A. Tarnowsky, West Bloomfield, MI (US);
Michael E. Polom, Oakland Township, MI (US);
Roger Joseph Rademacher, Holt, MI (US);
Donald D. Crites, Washington, MI (US);
Keith D. Van Maanen, Birmingham, MI (US);
Brian M Porto, Novi, MI (US);
Michael Chernyak, Farmington Hills, MI (US);
William L. Aldrich, III, Davisburg, MI (US);
Steven A. Tarnowsky, West Bloomfield, MI (US);
Michael E. Polom, Oakland Township, MI (US);
Roger Joseph Rademacher, Holt, MI (US);
Donald D. Crites, Washington, MI (US);
Keith D. Van Maanen, Birmingham, MI (US);
Brian M Porto, Novi, MI (US);
Michael Chernyak, Farmington Hills, MI (US);
Abstract
A system includes an auxiliary pump that provides pressurized fluid to a transmission during an engine auto stop/start event. A mechanical pump provides pressurized fluid to a transmission during engine operation after the engine auto stop/start event. An auxiliary pump diagnostic system includes a slip determination module that determines slip of a torque converter based on an engine speed and a transmission input speed. A fault determination module diagnoses a fault in the auxiliary pump in response to an engine auto start and based on the slip of the torque converter.