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:
Mar. 11, 2014
Filed:
Mar. 23, 2009
Bernd Dobele, Salem, DE;
Norbert Wiencek, Hagnau, DE;
Bernd Dobele, Salem, DE;
Norbert Wiencek, Hagnau, DE;
ZF Friedrichshafen AG, Friedrichshafen, DE;
Abstract
A shift control method for an automated gearshift transmission arranged in a drivetrain of a motor vehicle, between a drive motor and an axle drive, which is provided with unsynchronized gear clutches and whose input shaft can be connected to the driveshaft of the drive motor by an automatically controllable separator clutch such that, for an upshift, the synchronization of the target gear takes place with the separator clutch disengaged by setting a substantially constant braking torque at a transmission brake in driving connection with the input shaft. In order to speed up the shift sequence, without additional design measures, as the input speed of the gear clutch of the target gear approaches its output speed, to complete the synchronization, the separator clutch is partially engaged and then disengaged again substantially simultaneously as the transmission brake is released.