System for actively reducing rotational nonuniformity of a shaft, in particular, the drive shaft of an internal combustion engine, and method for this

US6405701B1 · kind B1 · utility

Assignees

• ISAD Electronic Systems GmbH & Co., KG · DE
• Gründl ünd Hoffmann GmbH Gesellschaft für elektrotechnische Entwicklungen · DE

Inventors

• Ullrich Masberg · Rösrath, DE
• Thomas Pels · Achern, DE
• Klaus-Peter Zeyen · Recklinghausen, DE
• Andreas Grundl · Hersbruck, DE
• Bernhard Hoffmann · Starnberg, DE

Key dates

• Filing date: Feb 27, 1998
• Grant date: Jun 18, 2002
• Expiry date: Feb 27, 2018

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/72
• WIPO field: Transport
• WIPO sector: Mechanical engineering

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.