Delphi Technologies, Inc.

Steering Solutions IP Holding Corporation

Nexteer (beijing) Technology Co., Ltd.

Gm Global Technolgoy Operations, Inc.

Geoff P Krieger

Kathryn L Pattok

William Henry Wittig

Tony M Dodak

Steve R Bannister

Julie Ann Kleinau

William H Wittig

Kathryn Lynn Pattok

A method for determining an absolute rotational position of a vehicle steering column is provided. In one exemplary embodiment, the method determines a relative position of a steering assist motor utilizing a relative position sensor. Thereafter, the method determines the absolute rotational position of the vehicle steering column based upon the relative position of the steering assist motor.

Method for determining an absolute rotational position of a vehicle steering column

System and method for determining an absolute rotational position of a vehicle steering column

An electric power steering system includes a steering wheel, an electric assist motor operatively coupled to the steering wheel, and an electronic controller operatively coupled to the motor for receiving a first signal representative of torque applied to the steering wheel, and a second signal representative of angular velocity of the motor. The electronic controller produces an active damping motor command signal according to a function of the first and second signals. The active damping motor command signal is scaled by a first factor if the first and second signals are both positive, or if the first and second signals are both negative, to provide a scaled motor command signal. The active damping motor command signal is scaled by a second factor if the first signal is positive and the second signal is negative, or if the first signal is negative and the second signal is positive, to provide the scaled motor command signal. The scaled motor command signal is applied to the motor.

Quadrant dependent active damping for electric power steering

A method for generating an active damping torque signal for a vehicle steering system includes receiving a vehicle speed input, receiving a handwheel velocity input, receiving a handwheel torque input, and generating an active damping torque output from each of the inputs, wherein the active damping torque output is non-linear with respect to the handwheel velocity input.

Method and system for improved active damping of steering systems

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Bay City, MI, United States of America

Geoff P Krieger