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:
Oct. 13, 2009
Filed:
Dec. 15, 2006
Alan G. Holmes, Clarkston, MI (US);
Gregory A. Hubbard, Brighton, MI (US);
Anthony H. Heap, Ann Arbor, MI (US);
William R. Cawthorne, Milford, MI (US);
Alan G. Holmes, Clarkston, MI (US);
Gregory A. Hubbard, Brighton, MI (US);
Anthony H. Heap, Ann Arbor, MI (US);
William R. Cawthorne, Milford, MI (US);
GM Global Technology Operations, Inc., Detroit, MI (US);
Abstract
A vehicle propulsion system includes an internal combustion engine having an engine output, an electro-mechanical transmission and a control system. The engine output is coupled to the transmission output at a speed ratio which is established by one of a plurality of electrically variable or fixed operating modes. Selection and control among the various operating modes is managed by a control in accordance with preferred optimum operating costs.