Motor-driven power steering unit

US7162341B2 · kind B2 · utility

Assignee

• ThyssenKrupp Presta Steertec GmbH · DE

Inventors

• Klaus Von Hammel · Hamburg, DE
• Harwin Niessen · Bad Mergentheim, DE

Key dates

• Filing date: Apr 8, 2002
• Grant date: Jan 9, 2007
• Expiry date: Jul 30, 2023

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B62D5/0469
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A motor-driven power steering unit comprising an electric motor for producing an auxiliary steering force in a steering system coupling a steering wheel to two wheels of a vehicle. The steering system provides assistance, based on steering information, to a rotation of the steering wheel by control of an electric current fed to the electric motor. A steering angle detection device is provided, wherein the steering system regulates the assistance as a function of a steering angle detected by the detection device. The assistance, or current, is reduced after a pre-set or pre-definable angle is reached or exceeded prior to reaching a respective end position. The reduction of the assistance or current is cancelled as soon as signs of steering force and the steering angel no longer coincide.