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:
Aug. 06, 2013
Filed:
Mar. 29, 2012
Aniket Kothari, Southfield, MI (US);
Jy-jen F. Sah, West Bloomfield, MI (US);
Ali K. Naqvi, White Lake, MI (US);
William Joseph Gourlay, Saline, MI (US);
Aniket Kothari, Southfield, MI (US);
Jy-Jen F. Sah, West Bloomfield, MI (US);
Ali K. Naqvi, White Lake, MI (US);
William Joseph Gourlay, Saline, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Daimler AG, Stuttgart, DE;
Chrysler Group LLC, Auburn Hills, MI (US);
Bayerische Motoren Werke Aktiengesellschaft, Munich, DE;
Abstract
A powertrain includes an electro-mechanical transmission mechanically-operatively coupled to an internal combustion engine and first and second electric machines adapted to selectively transmit mechanical power to an output member. An apparatus for controlling the powertrain includes the first and second electric machines, a first electric machine cooling circuit directing a cooling hydraulic flow to the first electric machine, a second electric machine cooling circuit directing a cooling hydraulic flow to the second electric machine, a hydraulic control system receiving a hydraulic flow and selectively channeling the hydraulic flow to the first and second electric machine cooling circuits, and an active electric machine cooling control system monitoring temperatures of the first and second electric machines, monitoring operation of the hydraulic control system, and selectively controlling the hydraulic control system.