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. 05, 2020
Filed:
Oct. 05, 2016
Zf Friedrichshafen Ag, Friedrichshafen, DE;
Johannes Kaltenbach, Friedrichshafen, DE;
Johannes Glückler, Eriskrich, DE;
Stefan Renner, Bodman-Ludwigshafen, DE;
Rayk Gersten, Friedrichshafen, DE;
ZF FRIEDRICHSHAFEN AG, Friedrichshafen, DE;
Abstract
A method of synchronizing the countershaft speed, in the direct gear, for a hybrid application. The transmission () comprises a main transmission (HG) comprising two parallel partial transmissions with at least one countershaft (VW), an output shaft (), and two planetary transmissions (PG, PG) each comprising a carrier (ST, ST), sun gear (SR, SR) and ring gear (HR, HR). Each partial transmission has a transmission input shaft (), with a hollow first input shaft () and the solid second input shaft (). The first planetary transmission (PG) connects as a range group to the main transmission (HG). The main transmission (HG) comprises first (R), second (R), third (R), fourth (R) and fifth gear planes (R) and first (S), second (S), third (S) and fourth shift elements (S). Synchronization of the countershaft speed to a target speed, in direct gear, is performed via speed control of the electric machine ().