Passive wheel lift identification for an automotive vehicle using operating input torque to wheel
First Claim
1. A method for passively determining wheel lift of a wheel of an automotive vehicle comprising:
- providing an operating input torque to the wheel;
determining the operating input torque to the wheel;
determining a rotational speed of the wheel;
determining a wheel response to the operating input torque; and
determining a wheel lift condition as a function of the operating input torque, the rotational speed of the wheel and the wheel response.
2 Assignments
0 Petitions
Accused Products
Abstract
A control system (18) and method for an automotive vehicle (10) used for detecting lift of a wheel includes a speed sensor (20) coupled to the wheel producing a wheel speed signal and a torque control system (57) coupled to the wheel for generating an operating input torque to the wheel. A controller (26) is coupled to the torque control system (57) and the wheel speed sensor (20). The controller (26) determines a wheel response to the operating input torque and generates a wheel lift signal as a function of the operating input torque, the wheel speed signal and the wheel response.
171 Citations
38 Claims
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1. A method for passively determining wheel lift of a wheel of an automotive vehicle comprising:
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providing an operating input torque to the wheel;
determining the operating input torque to the wheel;
determining a rotational speed of the wheel;
determining a wheel response to the operating input torque; and
determining a wheel lift condition as a function of the operating input torque, the rotational speed of the wheel and the wheel response. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method for passively determining wheel lift of a wheel of an automotive vehicle comprising:
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providing an operating input torque to the wheel;
determining a magnitude of the operating input torque to the wheel;
determining a wheel response to the operating input torque; and
generating a wheel lift signal and a wheel grounded signal as a function of the magnitude of the operating input torque and the wheel response. - View Dependent Claims (18, 19, 20, 21, 22)
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23. A method for passively determining wheel lift of a wheel of an automotive vehicle comprising:
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applying an operating input torque to a wheel;
passively determining an input torque magnitude and input torque direction;
determining wheel slip for the wheel;
determining a wheel response to the operating input torque;
determining a wheel response threshold in response to the operating input torque;
comparing the wheel response to the wheel response threshold; and
generating a wheel lifted signal or wheel grounded signal in response to the operating input torque, the wheel slip and comparing the wheel response. - View Dependent Claims (24, 25, 26, 27)
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28. A method for passively determining wheel lift of a wheel of an automotive vehicle comprising the steps of:
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applying an operating input torque to a wheel;
passively determining an input torque magnitude and input torque direction;
determining a wheel slip in response to the operating input torque;
determining a wheel slip threshold in response to the operating input torque;
comparing the wheel slip to the wheel slip threshold;
generating a wheel lifted signal when the wheel slip is above the wheel response threshold, the input torque magnitude is high and the and the wheel slip is diverging; and
when the input torque magnitude is large, the wheel slip is near zero, generating a grounded wheel signal. - View Dependent Claims (29, 30, 31, 32, 33)
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34. A system for detecting lift of a wheel of an automotive vehicle comprising:
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a speed sensor coupled to the wheel producing a wheel speed signal;
a torque control system coupled to the wheel for generating an operating input torque to the wheel; and
a controller coupled to the said torque control system and the wheel speed sensor, said controller determining a wheel response to the operating input torque, said controller generating a wheel lift signal as a function of the operating input torque, the wheel speed signal and the wheel response. - View Dependent Claims (35, 36, 37, 38)
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Specification