Zf Lenksysteme Gmbh

Robert Boschgmbh

Robert Bosch Automotive Steering Gmbh

Arnulf Heilig

Michael Bischofberger

Stephan Hiegler

Wolfgang Abele

Arthur Rupp

Andreas Kruttschnitt

Michael Friedel

Bernd Rommel

Duanxiang Zhang

Zheng Zhao

Hendrik Buering

Michael Boensch

Dietmar Hiller

Stefan Scherb

Ossmane Krini

Vitali Haag

Ralf Redemann

Claudio Rettenmeier

Patrick Ebert

Markus Weber

Stefan FRÖHLICH

Michael Bönsch

Claus-Dieter Müller

Georg Pfletschinger

Ingo Hillenbrand

Systems and methods for controlling an electric power steering system. The system includes an electric motor configured to provide a torque to a steering mechanism of a vehicle, a torsion bar torque sensor, a vehicle speed sensor, and a steering angle sensor. The system also includes an electronic controller configured to determine a failure of the torsion bar torque sensor, receive a vehicle speed from the vehicle speed sensor and a steering angle from the steering angle sensor, calculate a steering assistance torque based on the vehicle speed and the steering angle, calculate a hysteresis torque based on the steering angle, sum the steering assistance torque and the hysteresis torque to determine a turning torque, calculate a return torque and sum the turning torque and return torque to obtain an output torque, and generate a command for the electric motor to provide the output torque to the steering mechanism.

Backup control of electric power steering system when sensor failure occurs

A steering device for a vehicle includes a steering rod and at least one drive unit, wherein the steering rod can be displaced along its longitudinal extent by the drive unit. The steering device also includes at least one first sensor device for determining a displacement position of the steering rod. The steering rod, as seen along its longitudinal extent, exhibits at least one change in its cross section, in particular diameter, wherein the first sensor device is designed to sense the change.

Steering device

A method for determining a desired preset value (MSM) for a motor torque of an electric servomotor in a power assisted steering system for a motor vehicle, wherein the desired preset value is determined using a motor torque servo control component (MVSK) which forms a controlled section, and using a motor torque regulator component (MRK) which forms a regulated section, wherein the regulating variable is a torsion bar torque (MDS), the two motor torque components being functionally offset against one another in order to determine therefrom the desired preset value (YMSM) for the motor torque (MSM) of the servomotor (SM).

Method for operating an electric power assisted steering system for a motor vehicle

A method for controlling an electrical power steering system for a vehicle includes an electrical servomotor, a steering device for entering a reference value (&#x3b8;) of a steering angle into a control andlor regulation device, a moment sensor and an angle sensor for the steering device, a device for estimating the moment (M) at the steering device and an angle sensor for determining the angle (&#x3b8;) of a power take-off of the electrical servomotor. In order to control the electrical power steering system, which makes a non-critical behavior possible in the event of a malfunction or failure of a moment sensor at the steering device, provisions are made so that an offset value (&#x394;) is constantly formed from the reference value (&#x3b4;) of the steering angle and the actual value &#x3b8;of the steering angle, and a virtual moment (M) of the steering device is determined on the basis of the offset value (&#x394;) and is used to control the electrical servomotor.

Method for controlling an electric power steering system

A vehicle power steering system suppresses chattering, i.e., unpleasant noises in the form of mechanical and generally higher frequency oscillations resulting from backlash in a gear connection transmitting the torque from the motor to the steering wheel mechanics, produced under certain driving conditions. A control system is provided which evaluates the rotor rpm of the electric motor, and increases the dynamic response time of the rotor in the event that the evaluation of the rotor rpm indicates an unstable state of the control system. As a result, chattering is suppressed only when a critical driving situation arises in which the control system becomes unstable, while, in the normal state, the steering system exhibits all properties thereof, and is neither delayed nor limited in a dynamic behavior thereof.

Motor control in vehicle power steering system

A method is for compensating for a rotor angle deviation of a motor, which may be used as an actuator, e.g., as a servo actuator, in a steering system. The rotor angle deviation is compensated for by a piecewise linearized control of the difference between a desired rotor angle, which is based on a manual torque and a stored rotor angle, and a measured rotor angle, a control factor of the control being variable as a function of the control range.

Position-dependent friction compensation for steering systems

In a method for operating a steering system for a motor vehicle, a set point torque predefined value is fed to a servomotor as a function of a manual steering torque generated by the driver, in order to generate a motor actuating torque which is to be transmitted to the steered vehicle wheels. A hysteresis torque is taken into account in the set point torque predefined value in order to compensate for the friction in the steering system.

Method for operating a steering system for a motor vehicle and steering system

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Schwaebisch Gmuend, Germany

Arnulf Heilig