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:
Dec. 23, 2014
Filed:
Dec. 07, 2011
Zhe Xie, Rochester, MI (US);
Hong Yang, Rochester Hills, MI (US);
Anthony L. Smith, Troy, MI (US);
James M. Hart, Belleville, MI (US);
Steven P. Moorman, Dexter, MI (US);
Zhe Xie, Rochester, MI (US);
Hong Yang, Rochester Hills, MI (US);
Anthony L. Smith, Troy, MI (US);
James M. Hart, Belleville, MI (US);
Steven P. Moorman, Dexter, MI (US);
GM Global Technology Operations, LLC, Detroit, MI (US);
Abstract
A system for providing pressurized hydraulic fluid includes an engine driven main pump and an electrical motor driven auxiliary pump. The auxiliary pump provides hydraulic fluid at line pressure to shift control subsystems during a vehicle launch while the main pump provides hydraulic fluid to cooler or lubrication subsystems during the vehicle launch. A pressure regulation valve regulates the pressure of the hydraulic fluid from the main pump. Once the main pump reaches a critical speed, the main pump provides hydraulic fluid at line pressure to the hydraulic control system and the auxiliary pump is turned off.