ELECTRIC POWER ASSISTED STEERING (EPAS) SYSTEMS
First Claim
1. A vehicle comprising an electric power assisted steering (EPAS) system, wherein the EPAS system is configured to use at least an approximation of a torque contribution (Tweight) to the steering wheel torque caused by the presence of one or more weights disposed in the steering wheel in an off-center position to compensate for that torque contribution (Tweight) by computing a corrected value of steering wheel torque from a detected value of steering wheel torque and/or to compensate for that torque contribution (Tweight) by computing a corrected value of assistive motor torque.
1 Assignment
0 Petitions
Accused Products
Abstract
A vehicle comprising an electric power assist steering (EPAS) system, wherein the EPAS system is capable of receiving a detected value of steering wheel torque and wherein the EPAS system is operable to improve the accuracy of the detected value of steering wheel torque by compensating for a weight imbalance present in the steering wheel.
28 Citations
37 Claims
- 1. A vehicle comprising an electric power assisted steering (EPAS) system, wherein the EPAS system is configured to use at least an approximation of a torque contribution (Tweight) to the steering wheel torque caused by the presence of one or more weights disposed in the steering wheel in an off-center position to compensate for that torque contribution (Tweight) by computing a corrected value of steering wheel torque from a detected value of steering wheel torque and/or to compensate for that torque contribution (Tweight) by computing a corrected value of assistive motor torque.
- 5. A vehicle comprising an electric power assisted steering (EPAS) system, wherein the EPAS system is capable of receiving a detected value of steering wheel torque and wherein the EPAS system is configured to improve the accuracy of the detected value of steering wheel torque by compensating for a weight imbalance present in the steering wheel or by compensating for a weight imbalance present in the steering wheel and steering wheel column.
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7. (canceled)
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11. (canceled)
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12. (canceled)
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14. (canceled)
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16. (canceled)
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21. (canceled)
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22. (canceled)
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24. A method of assisting the steering of a vehicle, the method comprising:
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(i) providing an electronic power assisted steering (EPAS) system having an EPAS control unit and a steering wheel torque sensor; (ii) configuring the EPAS control unit to use at least an approximation of a torque contribution (Tweight), caused by the presence of one or more weights disposed within the steering wheel in an off-center position; and (iii) configuring the EPAS control unit to compute a corrected value of steering wheel torque using said torque contribution (Tweight); and
/or(iv) configuring the EPAS control unit to compute a corrected value of assistive motor torque using said torque contribution (Tweight). - View Dependent Claims (25, 26, 28, 30, 31, 33, 35)
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27. (canceled)
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29. (canceled)
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32. (canceled)
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34. (canceled)
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36. An electric power assisted steering (EPAS) system for a vehicle, the system being configured to use at least an approximation of a torque contribution (Tweight) to the steering wheel torque caused by the presence of one or more weights disposed in the steering wheel in an off-center position to compensate for that torque contribution (Tweight) by computing a corrected value of steering wheel torque from a detected value of steering wheel torque and/or to compensate for that torque contribution (Tweight) by computing a corrected value of assistive motor torque.
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37. (canceled)
Specification