Slip loss reduction control system for improving driveline efficiency
First Claim
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1. A method for reducing slip loss experienced by the tires of a vehicle, comprising:
- determining a longitudinal force associated with each tire;
determining an optimal slip coefficient for each tire based in part on the corresponding longitudinal force for the tire; and
determining a torque to be applied to each tire based in part on the optimal slip coefficient, thereby reducing the slip loss experienced by the tires of the vehicle.
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Abstract
A method is provided for reducing slip loss experienced by the tires of a vehicle. The method includes: determining a longitudinal force associated with each tire; determining an optimal slip coefficient for each tire based in part on the corresponding longitudinal force for the tire; and determining a torque to be applied to each tire based in part on the optimal slip coefficient, thereby reducing the slip loss experienced by the tires of the vehicle. This method is typically employed in the absence of other control algorithms used by a vehicle'"'"'s traction control system.
25 Citations
13 Claims
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1. A method for reducing slip loss experienced by the tires of a vehicle, comprising:
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determining a longitudinal force associated with each tire;
determining an optimal slip coefficient for each tire based in part on the corresponding longitudinal force for the tire; and
determining a torque to be applied to each tire based in part on the optimal slip coefficient, thereby reducing the slip loss experienced by the tires of the vehicle. - View Dependent Claims (2, 3, 4, 5)
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6. A method for improving driveline efficiency of a vehicle having an active traction control system, comprising:
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monitoring driving conditions during vehicle operation;
performing a vehicle safety action using the traction control system in response to a hazardous driving conditions; and
reducing slip loss experienced by the tires of the vehicle during non-hazardous driving conditions.
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7. The method of claim 7 wherein reducing slip loss further comprises
determining a longitudinal force associated with each tire; -
determining an optimal slip coefficient for each tire based in part on the corresponding longitudinal force for the tire; and
determining a torque to be applied to each tire based in part on the optimal slip coefficient, thereby reducing the slip loss experienced by the tires of the vehicle. - View Dependent Claims (12, 13)
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8. The method of claim 8 wherein determining a longitudinal force further comprises:
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estimating a friction coefficient between the tires of the vehicle and a driving surface being traversed by the vehicle;
determining a vertical force exerted on each tire; and
multiplying the friction coefficient by the vertical force for a given tire to determine the longitudinal force for the given tire. - View Dependent Claims (10, 11)
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9. The method of claim 9 wherein the friction coefficient is estimated using a Pacejka tire model.
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