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:
Apr. 03, 2012
Filed:
May. 29, 2009
Goro Tamai, West Bloomfield, MI (US);
Jy-jen F. Sah, West Bloomfield, MI (US);
Eric S. Tryon, Indianapolis, IN (US);
Scott a Miller, Commerce Township, MI (US);
Steven J. Shepherd, Commerce, MI (US);
Goro Tamai, West Bloomfield, MI (US);
Jy-Jen F. Sah, West Bloomfield, MI (US);
Eric S. Tryon, Indianapolis, IN (US);
Scott A Miller, Commerce Township, MI (US);
Steven J. Shepherd, Commerce, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A method of operating an auxiliary pump for an electrically variable transmission includes purging the auxiliary pump when an auxiliary pump temperature is below a minimum operating temperature and above a minimum purge temperature. The auxiliary pump fluid temperature and the minimum purge temperature are determined based upon the transmission fluid temperature and the ambient temperature.