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:
May. 28, 2013
Filed:
Jun. 18, 2009
Ulrich Reith, Schlier, DE;
Werner Wolfgang, Ravensburg, DE;
Bertram Wengert, Markdorf, DE;
Maik Wurthner, Friedrichshafen, DE;
Ulrich Reith, Schlier, DE;
Werner Wolfgang, Ravensburg, DE;
Bertram Wengert, Markdorf, DE;
Maik Wurthner, Friedrichshafen, DE;
ZF Friedrichshafen AG, Friedrichshafen, DE;
Abstract
A method of controlling a shifting operation in an automatic transmission of a commercial vehicle. A targeted gear and an associated target rotational speed are determined, via a transmission control, depending on predetermined parameters, and the shifting operation is executed upon reaching a determined shifting rotational speed. A shift interlock is activated, at least temporarily, during a downshifting operation when, upon reaching the shifting rotational speed, the determined target rotational speed lies below a predetermined rotational speed limit.