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:
Apr. 15, 2003
Filed:
May. 21, 2001
Brian Michael O'Neil, Ann Arbor, MI (US);
John Paul Gorys, Canton, MI (US);
John Mathew Pogorzelski, Brownstown Township, MI (US);
Jacob Martin Povirk, Novi, MI (US);
Joseph Scott Slayton, Sterling Heights, MI (US);
Steven DeWayne Dunn, Whitmore Lake, MI (US);
Ford Global Technologies, Inc., Dearborn, MI (US);
Abstract
A control strategy and method for controlling friction element engagement and disengagement time for an automatic transmission when the transmission is operating at cold ambient temperatures. During drive-to-reverse or reverse-to-drive friction element engagements with power on, the strategy compensates for a tendency of an oncoming friction element to gain capacity before an off-going clutch loses capacity, thereby avoiding a potential friction element tie-up condition when the transmission is operated with intermediate or high levels of engine torque as the friction elements are sequentially engaged and disengaged during cold rock cycling.