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. 20, 2013
Filed:
Jul. 03, 2008
Matthias Winkel, Sorocaba, BR;
Thomas Jager, Meckenbeuren, DE;
Roland Mair, Tettnang, DE;
Reiner Kneer, Nonnenhorn, DE;
Matthias Winkel, Sorocaba, BR;
Thomas Jager, Meckenbeuren, DE;
Roland Mair, Tettnang, DE;
Reiner Kneer, Nonnenhorn, DE;
ZF Friedrichshafen AG, Friedrichshafen, DE;
Abstract
A method of controlling an automatic transmission of a vehicle in which a hold gear function is activated by a driver request and is deactivated depending on a return condition. To allow an effective, safe to operate, and comfortable use, the return condition depends on one of the following criteria or a useful combination of the same: a flexible time span, consideration of the vehicle stand still time; a rotational speed of the vehicle engine, or one or several parameters which correlate with the engine rotational speed, a new, the same, or a different drive request by the driver, a change in the operating condition of the vehicle, and a plausibility check occurring during the startup procedure.