Wheel lift identification for an automotive vehicle
First Claim
1. A method for controlling an automotive vehicle having a plurality of wheels comprising:
- measuring a yaw rate;
measuring a lateral acceleration;
measuring a roll rate;
measuring longitudinal acceleration; and
determining wheel lift as a function of yaw rate, lateral acceleration, roll rate and longitudinal acceleration.
3 Assignments
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Accused Products
Abstract
A system and method for detecting wheel lift of an automotive vehicle includes a yaw rate sensor (28) that generates a yaw rate signal, a lateral acceleration sensor (32) that generates a lateral acceleration signal, a roll rate sensor (34) generating a roll rate signal, and a longitudinal acceleration sensor (36) for generating a longitudinal acceleration signal. A controller (18) is coupled to the yaw rate sensor (28), the lateral acceleration sensor (32), the roll rate sensor (34), and the longitudinal acceleration sensor (36). The controller determines a dynamic load transfer acting on the plurality of wheels as a function of yaw rate, lateral acceleration roll rate, and longitudinal acceleration. Normal forces for each of the plurality of wheels is determined as a function of the dynamic load transfer. Wheel lift is indicated when at least one of the normal forces for each of the plurality of wheels is less than a normal force threshold.
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Citations
20 Claims
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1. A method for controlling an automotive vehicle having a plurality of wheels comprising:
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measuring a yaw rate;
measuring a lateral acceleration;
measuring a roll rate;
measuring longitudinal acceleration; and
determining wheel lift as a function of yaw rate, lateral acceleration, roll rate and longitudinal acceleration. - View Dependent Claims (2, 3, 4)
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5. A method for determining wheel lift of a wheel of an automotive vehicle comprising:
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estimating a normal force acting on the wheel;
comparing the normal force to a normal force threshold; and
indicating wheel lift when the normal force of the wheel is less than the normal force threshold. - View Dependent Claims (6, 7, 8, 9, 10)
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11. A method for monitoring a condition of an automotive vehicle having a plurality of wheels comprising:
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determining a static normal force acting on said plurality of wheels;
determining a dynamic load transfer acting on said plurality of wheels;
determining normal forces for each of said plurality of wheels in as a function of the static normal force and the dynamic load transfer; and
indicating wheel lift when at least one of the normal forces for each of said plurality of wheels is less than the normal force threshold. - View Dependent Claims (12, 13, 14, 15, 16, 17, 19, 20)
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18. A system for detecting lift of a wheel of an automotive vehicle comprising:
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a yaw rate sensor generating a yaw rate signal;
a lateral acceleration sensor generating a lateral acceleration signal;
a roll rate sensor generating a roll rate signal;
a longitudinal acceleration sensor generating a longitudinal acceleration signal; and
a controller coupled to said yaw rate sensor, said lateral acceleration sensor, said roll rate sensor and said longitudinal acceleration sensor, said controller determining a dynamic load transfer acting on said plurality of wheels as a function of yaw rate, lateral acceleration, roll rate and longitudinal acceleration, determining normal forces for each of said plurality of wheels as a function of the dynamic load transfer, and indicating wheel lift when at least one of the normal forces for each of said plurality of wheels is less than a normal force threshold.
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Specification