Method for controlling the valve characteristic

US6195601A · kind A · utility

Assignee

• TRW Fahrwerksysteme GmbH & Co. KG · DE

Inventors

• Robert Spillner · Düsseldorf, DE
• Mathias Seidel · Neuss, DE

Key dates

• Filing date: Apr 13, 1999
• Grant date: Feb 27, 2001
• Expiry date: Apr 13, 2019

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B62D5/065
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

To improve a method for controlling the valve characteristic in electrohydraulic power-assisted steering systems of motor vehicles so as to prevent any impairment of the steering precision, the invention proposes to control the speed of the electric motor as a function of the current consumption such that the actual current consumption and the actual speed of the electric motor are continuously measured up to a maximum speed and compared with values for the setpoint speed at the respective value of the current consumption stored in a memory and in case of deviation a correction to the setpoint speed is effected.