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:
Sep. 18, 2012
Filed:
Jan. 19, 2010
Alan G. Holmes, Clarkston, MI (US);
Jy-jen F. Sah, West Bloomfield, MI (US);
Kevin Michael Dougan, Plymouth, MI (US);
Norman Schoenek, Novi, MI (US);
Michael R. Schmidt, Springfield, MO (US);
Alan G. Holmes, Clarkston, MI (US);
Jy-Jen F. Sah, West Bloomfield, MI (US);
Kevin Michael Dougan, Plymouth, MI (US);
Norman Schoenek, Novi, MI (US);
Michael R. Schmidt, Springfield, MO (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A hydraulic control system for a transmission includes a motor, a sump for storing a hydraulic fluid, and a dual element pump connected to the motor. The dual element pump has at least one input port connected to the sump, a first outlet port, and a second outlet port. The dual element pump provides a first volume of hydraulic fluid to the first outlet port and provides a second volume of hydraulic fluid to the second outlet port. The first volume is greater than the second volume. The first outlet port is connected to a diversion valve. The second outlet port is connected to a high pressure hydraulic circuit. The diversion valve is operable to transmit the hydraulic fluid from the first outlet port to a low pressure hydraulic circuit and the high pressure hydraulic circuit.