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. 18, 2012
Filed:
Jan. 26, 2009
Bernd Dobele, Salem, DE;
Norbert Wiencek, Hagnau, DE;
Bernd Dobele, Salem, DE;
Norbert Wiencek, Hagnau, DE;
ZF Friedrichshafen AG, Friedrichshafen, DE;
Abstract
A device for reducing the drop in tractive force during the gear shifting phase of an automatic transmission comprising an automatically actuated drive clutch. The device comprises a rotary storage device that can be coupled, if necessary via two transmission ratio steps () that are each assigned a friction clutch (), to the output shaft of the transmission or, if the transmission has a downstream range group, to the output shaft of the main friction transmission. Only one of the two friction clutches () can be activated at any time, and a step up ratio can be achieved and the rotary storage device can be loaded with one of the transmission ratio steps (). A step down ratio can be achieved and energy can be released from the rotary storage device to the output shaft using the other transmission ratio step ().