Abstract: The invention concerns a drive system, especially for a motor vehicle, with a multicylinder internal combustion engine, a device for shutting off at least some of the cylinders of the internal combustion engine, and a device for active reduction of rotational nonuniformities, acting in particular on a shaft, such as a drive shaft of the internal combustion engine, or a shaft that is coupled or which can be coupled to it, which is active at least for certain operating states during cylinder shutoff mode. A method of operating such a drive system is also disclosed.
Type:
Grant
Filed:
April 13, 2001
Date of Patent:
December 3, 2002
Assignees:
ISAD Electronic Systems GmbH & Co., KG, Gründl ünd Hoffmann GmbH Gesellschaft für
elektrotechnische Entwicklungen
Inventors:
Ullrich Masberg, Thomas Pels, Klaus-Peter Zeyen, Andreas Gründl, Bernhard Hoffmann
Abstract: The invention concerns a system for active reduction of rotational nonuniformities of a shaft, especially the drive shaft (10) of an internal combustion engine or a shaft that is coupled or can be coupled to it, with at least one electric machine (4), which is coupled or can be coupled to the shaft, wherein the electric machine (4) is controlled such that it generates a rapidly varying torque, to reduce the rotational nonuniformities, and it superimposes on this torque a positive or negative torque in order to further achieve a driving action or braking or generator type action. The invention is also oriented to a corresponding method for active reduction of rotational nonuniformities.
Type:
Grant
Filed:
February 27, 1998
Date of Patent:
June 18, 2002
Assignees:
ISAD Electronic Systems GmbH & Co. KG, Gründl und Hoffmann GmbH Gesellschaft für
elektrotechnische Entwicklungen
Inventors:
Ullrich Masberg, Thomas Pels, Klaus-Peter Zeyen, Andreas Gründl, Bernhard Hoffmann