Method for controlling an electric power assist steering system with low hysteresis and torque ripple
First Claim
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1. A method for controlling an electric power assist steering system comprising:
- sensing torque in a steering shaft at a point along said steering shaft between a hand wheel and a mechanical connection to an electric motor, said sensing comprising sensing a magnetic field direction and intensity.
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Abstract
An electric power assist steering system is controlled by sensing torque in a steering shaft at a point along said steering shaft between a hand wheel and a mechanical connection to an electric motor, wherein the sensing includes sensing a magnetic field direction and intensity.
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Citations
14 Claims
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1. A method for controlling an electric power assist steering system comprising:
sensing torque in a steering shaft at a point along said steering shaft between a hand wheel and a mechanical connection to an electric motor, said sensing comprising sensing a magnetic field direction and intensity. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of controlling an electric power assist steering system with reduced hysteresis and torque ripple, the method comprising:
sensing torque in a steering shaft at a point along said steering shaft between a hand wheel and a mechanical connection to an electric motor, said sensing comprising sensing a magnetic field direction and intensity without use of a torsion bar, thereby reducing said hysteresis and said torque ripple in said system. - View Dependent Claims (10, 11, 12, 13, 14)
Specification