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:
Feb. 17, 2009
Filed:
Jan. 27, 2003
Franz Bitzer, Friedrichshafen, DE;
Christian Lauinger, Baden-Baden, DE;
Michael Reuschel, Ottersweier, DE;
Martin Vornehm, Bühl, DE;
André Teubert, Bühl, DE;
Manfred Homm, Bühl-Neusatz, DE;
Eric Müller, Kaiserslauten, DE;
Reinhard Stehr, Bühl, DE;
Bernhard Walter, Oberkirch, DE;
Franz Bitzer, Friedrichshafen, DE;
Christian Lauinger, Baden-Baden, DE;
Michael Reuschel, Ottersweier, DE;
Martin Vornehm, Bühl, DE;
André Teubert, Bühl, DE;
Manfred Homm, Bühl-Neusatz, DE;
Eric Müller, Kaiserslauten, DE;
Reinhard Stehr, Bühl, DE;
Bernhard Walter, Oberkirch, DE;
Abstract
A method for regulating or controlling the transmission ratio of an automatic power-branched transmission. Power is transmitted through a shaft driven by an engine, a variable speed drive, a gear transmission, a driven shaft, and at least two control clutches. The variable speed drive and the gear transmission are connected to each other in such a way that the regulating range of the variable speed drive is traversed in one direction within a first range of transmission ratios, and is traversed in the opposite direction within a second range of transmission ratios during traversing of the entire range of transmission ratios. The shifting strategies result in reduced wear of the endless belt device and allow for comfortable changing between the transmission ratio ranges.