Determining a target steering torque in a steering device

US8249777B2 · kind B2 · utility

Assignee

• ZF Lenksysteme GmbH · DE

Inventors

• Roland Greul · Hinterhochstett, DE
• Thomas Werner · Portland, US

Key dates

• Filing date: Aug 3, 2011
• Grant date: Aug 21, 2012
• Expiry date: Aug 3, 2031

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B62D6/008
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

In order to achieve a steering feel for SbW systems and EPS systems having a control design for controlling the steering torque by generating a target steering torque (torTB) that can be adapted to various steering systems, vehicle types, or requirements, in which the resulting steering feel is a steering feel, in all driving conditions and driving situations, which is equivalent to, or better than, hydraulic and electromechanical steering systems available on the market today, according to the invention: a base steering torque (torB) is determined as a function of an externally acting force (torR) and a vehicle speed (velV); a damping torque (torD) is determined as a function of a steering speed (anvSW) and the vehicle speed (velV); a hysteresis torque (torF) is determined as a function of the steering speed (anvSW) and the vehicle speed (velV); a centering torque (torCF; torC) in the direction of the straight-ahead position is determined as a function of a steering wheel angle (angSW) and the vehicle speed (velV); and the base steering torque (torB), the damping torque (torD), the hysteresis torque (torF) and the centering torque (torCF; torC) form individual components, as a fun…