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:
Dec. 18, 2018
Filed:
May. 24, 2016
Zf Friedrichshafen Ag, Friedrichshafen, DE;
Florian Schneider, Lindenberg im Allgäu, DE;
Roland Mair, Tettnang, DE;
ZF Friedrichshafen AG, Friedrichshafen, DE;
Abstract
A method of operating a drive-train with an automated transmission and a drive aggregate and the automated transmission provides at least two starting gears for the forward driving direction, and with a transmission-internal or transmission-external starting clutch. The method of operating the drive-train, during crawling at a crawling speed in the forward driving direction, such that for crawling in a starting gear engaged in the transmission for forward driving and with the starting clutch engaged without slip, the drive aggregate is operated in a rotational speed regulated manner so that a crawling speed is obtained, which depends on the rotational speed of the drive aggregate and the gear ratio of the starting gear engaged in the transmission. Based on actuation of an operating element of a speed regulating unit, at least one appropriate starting gear for crawling is determined and automatically engaged in the transmission.