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. 07, 2012
Filed:
Nov. 20, 2009
Larry A. Pritchard, Macomb, MI (US);
Philip J. Francis, Lapeer, MI (US);
Thad Kopp, Oakland Township, MI (US);
Tsunlock A. Yu, Saline, MI (US);
Larry A. Pritchard, Macomb, MI (US);
Philip J. Francis, Lapeer, MI (US);
Thad Kopp, Oakland Township, MI (US);
Tsunlock A. Yu, Saline, MI (US);
Borgwarner, Inc., Auburn Hills, MI (US);
Abstract
A hydraulic clutch assembly for a motor vehicle driveline is provided. The clutch assembly comprises an input member, and output member and a friction clutch pack operably disposed therebetween for controlling torque transfer. A first fluid circuit contains hydraulic based fluid at a first pressure and is in fluid communication with the friction clutch pack for lubrication thereof. A second fluid circuit is in fluid communication with the first fluid circuit for replenishing the second fluid circuit with the hydraulic based fluid at a second pressure that is less than the first pressure. The clutch assembly further comprises a motor and a gear train. A first piston is in fluid communication with the second fluid circuit for delivering the hydraulic based fluid thereto A second piston is translated by the hydraulic based fluid displaced by the first piston to actuate the friction clutch pack.