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. 29, 2011
Filed:
Oct. 10, 2008
Peter E. Wu, Brighton, MI (US);
Ali K Naqvi, White Lake, MI (US);
Rebecca Trierweiler, White Lake, MI (US);
Syed Naqi, Ann Arbor, MI (US);
Ryan D Martini, Royal Oak, MI (US);
Peter E. Wu, Brighton, MI (US);
Ali K Naqvi, White Lake, MI (US);
Rebecca Trierweiler, White Lake, MI (US);
Syed Naqi, Ann Arbor, MI (US);
Ryan D Martini, Royal Oak, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Daimler AG, Stuttgart, DE;
Chrysler LLC, Auburn Hills, MI (US);
Bayerische Motoren Werke Aktiengesellschaft, Munich, DE;
Abstract
A powertrain system includes a hybrid transmission coupled to an engine and an auxiliary hydraulic pump. The auxiliary hydraulic pump is commanded to operate at a predetermined speed only when enable criteria are met. An engine-off state is inhibited based upon a difference between a commanded speed and a monitored operating speed of the auxiliary hydraulic pump.