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:
Jun. 23, 2009
Filed:
Sep. 28, 2006
Henning Strauss, Uetze, DE;
Bernd-guido Schulze, Wolfsburg, DE;
Henning Strauss, Uetze, DE;
Bernd-Guido Schulze, Wolfsburg, DE;
Volkswagen Aktiengesellschaft, Wolfsburg, DE;
Abstract
A continuously variable transmission has a drive shaft, a power takeoff shaft and a power branching device disposed therebetween and has a continuously variable power branch containing a variator, and a mechanical power branch parallel thereto. To provide a large adjustment range and a high level of efficiency in conjunction with a simple and space-saving configuration, the variator is an electromagnetic transmission with a rotatably mounted drive rotor connected to an input shaft, a rotatably mounted power takeoff rotor connected to an output shaft, and a stator connected fixed in terms of rotation and mounted axially displaceably. The rotors have permanent magnets which are each distributed circumferentially axially adjacent to one another and have alternating polarity. The stator has at least one short-circuit winding disposed radially adjacent to the permanent magnets and the effective transmission ratio being adjustable by axial displacement of the stator relative to the rotors.