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. 08, 2008
Filed:
Aug. 17, 2005
Peter Barrette, Ann Arbor, MI (US);
John Glab, Riverview, MI (US);
Joseph Torres, Dearborn, MI (US);
John O'rear, Whitmore Lake, MI (US);
Brian Hildreth, Plymouth, MI (US);
Peter Barrette, Ann Arbor, MI (US);
John Glab, Riverview, MI (US);
Joseph Torres, Dearborn, MI (US);
John O'Rear, Whitmore Lake, MI (US);
Brian Hildreth, Plymouth, MI (US);
Ford Global Technologies, LLC, Dearborn, MI (US);
Abstract
A four wheel drive powertrain control for an automotive vehicle is disclosed. It includes a torque transfer case that distributes power from an engine-powered transfer case mainshaft to a secondary driving axle through a friction clutch as power is distributed directly from the engine-powered mainshaft to a primary driving axle. The friction clutch capacity is sufficient to mechanically lock the transfer case in a four wheel drive mode. If the clutch torque capacity is exceeded, a control algorithm will strategically ramp down engine torque requests by a powertrain controller to eliminate clutch slip.