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:
Jul. 24, 2012
Filed:
Apr. 30, 2010
John R. Czoykowski, Grosse Pointe Park, MI (US);
Michael L. Duhaime, Northville, MI (US);
Chinar S. Ghike, Livonia, MI (US);
Mark A. Vernacchia, Northville, MI (US);
John R. Czoykowski, Grosse Pointe Park, MI (US);
Michael L. Duhaime, Northville, MI (US);
Chinar S. Ghike, Livonia, MI (US);
Mark A. Vernacchia, Northville, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A control system for a hybrid drive unit includes a pressure regulator valve, a first variable bleed solenoid valve for controlling a stationary clutch and a second variable bleed solenoid valve for controlling a rotating clutch. The control system controls the stationary clutch and the rotating clutch to operate the hybrid drive unit in four different modes.