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:
Sep. 23, 2014
Filed:
Dec. 21, 2010
Valentine Herbeth, Friedrichshafen, DE;
Jorg Arnold, Immenstaad, DE;
Georg Mihatsch, Lindau, DE;
Andreas Schmidt, Bavendorf, DE;
Thilo Schmidt, Meckenbeuren, DE;
Gabor Diosi, Friedrichshafen, DE;
Christoph Margraf, Salem, DE;
Valentine Herbeth, Friedrichshafen, DE;
Jorg Arnold, Immenstaad, DE;
Georg Mihatsch, Lindau, DE;
Andreas Schmidt, Bavendorf, DE;
Thilo Schmidt, Meckenbeuren, DE;
Gabor Diosi, Friedrichshafen, DE;
Christoph Margraf, Salem, DE;
ZF Friedrichshafen AG, Friedrichshafen, DE;
Abstract
A method of operating a transmission device () having a plurality of frictionally engaging shift elements (B, C, D and E) and at least one form-locking shift element (A, F) for implementing different transmission ratios. Upon a requested change in operating state of the transmission device (), the at least one form-locking shift element (A) is transferred into an at least nearly load-free state, during which the form-locking shift element (A) is transferred from an engaged to a disengaged operating state by increasing the transfer capability of at least one frictionally engaging shift element (E), which is not engaged in the power flow of the transmission device () either to represent the present operating state or to represent the requested operating state.