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. 22, 2014
Filed:
Feb. 14, 2013
Ford Global Technology Operations, Llc, Dearborn, MI (US);
Gregory Michael Peitron, Canton, MI (US);
Sarah M. Thornton, Sacramento, CA (US);
Diana Yanakiev, Birmingham, MI (US);
James William Loch McCallum, Ann Arbor, MI (US);
Anuradha Annaswamy, W. Newton, MA (US);
Ford Global Technologies, LLC, Dearborn, MI (US);
Abstract
A method for controlling pressure applied to a displaceable piston in a cylinder, piston displacement actuating a control element of an automatic transmission during a gearshift, includes determining whether piston displacement exceeds a free length of an isolation spring located between the piston and a friction plate of the control element; calculating the pressure using A the cross-sectional area of the piston; K a coefficient of a return spring extending between the piston and a reference position in the cylinder; x the piston displacement; Fa pre-load of the return spring; xthe free length of the isolation spring; and Ka coefficient of the isolation spring; and applying the calculated pressure to the piston.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile