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. 30, 2013
Filed:
Jan. 13, 2010
Jorg Arnold, Immenstaad, DE;
Klaus Steinhauser, Kressbronn, DE;
Valentine Herbeth, Friedrichshafen, DE;
Christian Popp, Kressbronn, DE;
Thilo Schmidt, Meckenbeuren, DE;
Peter Ziemer, Tettnang, DE;
Gabor Diosi, Friedrichshafen, DE;
Christoph Margraf, Salem, DE;
Jorg Arnold, Immenstaad, DE;
Klaus Steinhauser, Kressbronn, DE;
Valentine Herbeth, Friedrichshafen, DE;
Christian Popp, Kressbronn, DE;
Thilo Schmidt, Meckenbeuren, DE;
Peter Ziemer, Tettnang, DE;
Gabor Diosi, Friedrichshafen, DE;
Christoph Margraf, Salem, DE;
ZF Friedrichshafen AG, Friedrichshafen, DE;
Abstract
A method is described for the operation of a transmission device () with a plurality of frictional shift elements (A, D, E, F) and at least one interlocking shift element (B, C) for obtaining various gear ratios. When a command is received for a gearshift during which the interlocking shift element (C) has to be changed from an open to a closed operating condition, the interlocking shift element (C) is at least approximately synchronized by increasing the transmission capacity of at least one frictional shift element (A) which does not have to be engaged in the force flow either to obtain the gear ratio that is to be disengaged or to obtain the gear ratio that is to be engaged.