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. 23, 2019
Filed:
Jan. 13, 2017
Zf Friedrichshafen Ag, Friedrichshafen, DE;
Marcus Hiemer, Meckenbeuren, DE;
Jan-Frederik Kuhn, Friedrichshafen, DE;
Stephan Schinacher, Egesheim, DE;
Sven Bieber, Bermatingen, DE;
Jürgen Legner, Friedrichshafen, DE;
ZF Friedrichshafen AG, Friedrichshafen, DE;
Abstract
A method for the operation of a vehicle drive-train of a working machine having a drive motor, a transmission whose transmission ratio can be varied continuously, and a drive output. A rotational speed (nmot) of the drive motor can be varied by the driver, by the driver's actuation of a first control element (), within a rotational speed range () delimited by an upper characteristic line (nmoto) and a lower characteristic line (nmotu). The characteristic lines (nmoto, nmotu) are functions of a reciprocal transmission ratio (irez) of the transmission. Furthermore, the rotational speed (nmot) of the drive motor that can be set by the driver by way of the first control element (), can be influenced by the driver's actuation of a second control element () and as a function of an operating condition of the working machine.