Method for Detecting Internal Friction in a Steering System
AssigneeFord Global Technologies, LLC
InventorKlaus Schusteritz
Life of this patent
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Abstract
A method for detecting internal friction in an electric steering system of a motor vehicle having a control unit. The method comprises: defining a limiting value for a change in a steering column torque; defining a limiting value for a change in a steering rack position; measuring an actual steering column torque; measuring an actual change in a steering rack position; and generating a fault message if the actual steering column torque exceeds the limiting value for the change in a steering column torque and if an actual change in steering rack position is less than or equal to the limiting value for a change in a steering rack position.
Claims11
A method for detecting internal friction in an electric steering system of a motor vehicle having a control unit, the method comprising:
- defining a limiting value for a change in a steering column torque;
- defining a limiting value for a change in a steering rack position;
- measuring an actual steering column torque;
- measuring an actual change in a steering rack position;
- and
- generating a fault message if the actual steering column torque exceeds the limiting value for the change in a steering column torque and if an actual change in steering rack position is less than or equal to the limiting value for a change in a steering rack position.
A method for detecting internal friction in an electric steering system of a motor vehicle having a control unit, the method comprising:
- defining a limiting value for a change in a steering column torque;
- measuring an actual steering column torque;
- and
- generating a fault message if the actual steering column torque exceeds the limiting value for the change in the steering column torque and if there is substantially no actual change in steering rack position.
Dependencies are inferred from the claim text.