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:
May. 07, 2013
Filed:
Feb. 17, 2010
Philip C. Lundberg, Keego Harbo, MI (US);
Bret M. Olson, Whitelake, MI (US);
Robert L. Moses, Ann Arbor, MI (US);
Kevin Michael Dougan, Plymouth, MI (US);
Philip C. Lundberg, Keego Harbo, MI (US);
Bret M. Olson, Whitelake, MI (US);
Robert L. Moses, Ann Arbor, MI (US);
Kevin Michael Dougan, Plymouth, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A hydraulic control system for a dual clutch transmission includes a source of pressurized hydraulic fluid, first and second actuator control devices in downstream fluid communication with the source of pressurized hydraulic fluid, and first and second clutch control devices in downstream fluid communication with the source of pressurized hydraulic fluid. A first valve is in downstream fluid communication with the first and second actuator control devices. A second valve is in downstream fluid communication with the first valve, the first clutch control device and the second clutch control device, and the second valve is moveable between two positions by the first and second clutch control devices. Selective activation of combinations of the control devices allows for a pressurized fluid to engage the dual clutch and an actuator in order to shift the transmission into a desired gear ratio.