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:
Mar. 26, 2013
Filed:
Feb. 17, 2010
Steven P. Moorman, Dexter, MI (US);
Chinar S. Ghike, Livonia, MI (US);
John R. Czoykowski, Grosse Pointe Park, MI (US);
Steven P. Moorman, Dexter, MI (US);
Chinar S. Ghike, Livonia, MI (US);
John R. Czoykowski, Grosse Pointe Park, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A hydraulic control system for a transmission includes a first source of pressurized hydraulic fluid, a second source of pressurized hydraulic fluid, a lubrication subsystem for communicating a pressurized hydraulic fluid through the transmission, and a fluid control device in communication with the first source of pressurized hydraulic fluid. A lubrication regulation valve is in communication with the first and second sources of pressurized hydraulic fluid, the fluid control device, and the lubrication subsystem. The lubrication regulation valve allows fluid communication from the first source of pressurized hydraulic fluid to the lubrication subsystem when in a first position, the valve allows fluid communication from the first and second source of pressurized hydraulic fluid to the lubrication subsystem when in a second position, and the valve allows fluid communication from the first source of pressurized hydraulic fluid through the flow restriction device to the lubrication subsystem when in a third position.