Vehicle control of a locked drive system
First Claim
1. A vehicle, comprising:
- a first wheel;
a second wheel mechanically coupled to the first wheel;
a locking drive differential mechanically coupled to the second wheel;
a third wheel mechanically coupled to the locked drive differential; and
a stability controller coupled to the third wheel, the stability controller being programmed to attain a slip rate of about the first wheel and the second wheel at the third wheel when stabilizing the vehicle in an over-steer condition.
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Accused Products
Abstract
A vehicle includes multiple wheels, a locking drive differential, and a stability controller. A first wheel is mechanically coupled to a second wheel. The locking drive differential mechanically couples the second wheel to a third wheel. The stability controller is coupled to the third wheel. The stability controller is programmed to attain a slip rate of about the first and the second wheel at the third wheel, which stabilizes the vehicle in an over-steer condition. The method applies a modulated stability pressure to the third wheel until the third wheel attains about the combined slip rate of the first wheel and the second wheel and a fourth wheel is rotating at about the velocity of the vehicle.
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Citations
22 Claims
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1. A vehicle, comprising:
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a first wheel;
a second wheel mechanically coupled to the first wheel;
a locking drive differential mechanically coupled to the second wheel;
a third wheel mechanically coupled to the locked drive differential; and
a stability controller coupled to the third wheel, the stability controller being programmed to attain a slip rate of about the first wheel and the second wheel at the third wheel when stabilizing the vehicle in an over-steer condition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 16, 18, 19, 20)
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15. A vehicle, comprising:
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a first wheel;
a second wheel mechanically coupled to the first wheel;
a locking drive differential mechanically coupled to the second wheel;
a third wheel mechanically coupled to the locking drive differential;
a fourth wheel mechanically coupled to the locking drive differential; and
a controller coupled to the third wheel, the controller being configured to assign a slip rate of about the first wheel and the second wheel to the third wheel using an inverse phase braking strategy.
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17. A method of stabilizing a vehicle in an over-steer condition, comprising:
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detecting an over-steer condition;
assigning brake control priority to a first wheel and a fourth wheel;
assigning stability control priority to a second wheel and a third wheel; and
applying pressure to the third wheel until the third wheel attains a combined slip rate of about the first wheel and the second wheel where the fourth wheel is rotating at about a velocity of the vehicle.
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21. A stability controller, comprising:
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a logic circuit;
a memory interfaced to the logic circuit; and
software comprising instructions that may be executed by the logic circuit to attain a slip rate of a plurality of wheels in an over-steer condition. - View Dependent Claims (22)
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Specification