Slip ratio point optimization system and method for vehicle control

Patent metadata

Field	Value
Publication number	US-2016159367-A1
Application number	US-201414558764-A
Country	US
Kind code	A1
Filing date	Dec 3, 2014
Priority date	Dec 3, 2014
Publication date	Jun 9, 2016
Grant date	—

Abstract

An optimal tire slip ratio estimation system and method affixes a tire-identification device to a vehicle tire to provide a tire-specific identification and one or more sensors affixed to the tire for measuring one or more tire-specific parameters. A model-based optimal slip ratio estimator generates a model-derived optimal tire slip ratio estimation based upon an assessment of sensor-derived tire-specific parameter information based on the tire-specific identification.

First claim

1 . A tire optimal slip ratio estimation system comprising:
vehicle supported by at least one vehicle tire mounted to a hub, the vehicle tire having a tire cavity and a ground-engaging tread, and the tire having a plurality of tire-specific measureable parameters; a tire-affixed tire-identification device for providing a tire-specific identification; a plurality of tire-affixed sensors mounted to the tire operably measuring the tire-specific parameters and generating tire-specific parameter information; a model-based optimal tire slip ratio estimator operable to generate a model-derived optimal tire slip ratio estimation from an assessment of the tire-specific parameter information relative to the tire-specific identification.

2 . The optimal tire slip ratio estimation system of claim 1 , wherein the tire-specific parameter information is from the group:
a load estimation for the one vehicle tire; temperature of the one vehicle tire; air pressure within a cavity of the one vehicle tire; and a wear estimation for a tread region of the one vehicle tire.

3 . The optimal tire slip ratio estimator according to claim 2 , wherein the load estimation operably calculates a load estimation based upon a vehicle-based hub accelerometer signal.

4 . The optimal tire slip ratio estimation system of claim 1 , wherein the model-derived optimal tire slip ratio estimation is substantially continuously updated during an operation of the vehicle.

5 . The optimal tire slip ratio estimation system of claim 4 , wherein the updated model-derived optimal tire slip ratio estimation is operably utilized in at least one control system of the vehicle.

6 . An optimal tire slip ratio estimation system comprising:
a vehicle supported by at least one vehicle tire mounted to a hub, the vehicle tire having a tire cavity and a ground-engaging tread, and the tire having a plurality of tire-specific measureable parameters; a tire-affixed tire-identification device for providing a tire-specific identification; a plurality of tire-affixed sensors mounted to the tire operably measuring the tire-specific parameters and generating tire-specific parameter information, the tire-specific parameter information including: a load estimation for the one vehicle tire, temperature of the one vehicle tire, air pressure within a cavity of the one vehicle tire and a wear estimation for a tread region of the one vehicle tire; a model-based optimal slip ratio estimator operable to generate a model-derived optimal tire slip ratio estimation from an assessment of the tire-specific information relative to the tire-specific identification.

7 . The optimal tire slip ratio estimator according to claim 6 , wherein the load estimation input into the model-based optimal tire slip ratio estimator operably calculates a load estimation based upon a vehicle-based hub accelerometer signal.

8 . The optimal tire slip ratio estimation system of claim 6 , wherein the model-derived optimal tire slip ratio estimation is substantially continuously updated during an operation of the vehicle.

9 . The optimal tire slip ratio estimation system of claim 8 , wherein the updated model-derived optimal tire slip ratio estimation is operably utilized in at least one control system of the vehicle.

10 . A method of making an optimal tire slip ratio estimation comprising:
mounting at least one vehicle tire to a vehicle, the vehicle tire having a tire cavity and a ground-engaging tread and the tire having a plurality of tire-specific measureable parameters; affixing to the one vehicle tire a tire identification device providing a tire-specific identification; mounting a plurality of tire-affixed sensors to the tire operably measuring the tire-specific parameters to generate tire-specific parameter information; inputting the tire-specific information into a model-based optimal slip ratio estimator; and generating a model-derived optimal tire slip ratio estimation by the model-based optimal tire slip ratio estimator from an assessment of the tire-specific parameter information relative to the tire-specific identification.

11 . The method according to claim 10 , wherein further comprising including within the tire-specific parameter information a load estimation for the one vehicle tire, temperature of the one vehicle tire, air pressure within a cavity of the one vehicle tire and a wear estimation for a tread region of the one vehicle tire.

12 . The method according to claim 11 , wherein further comprising utilizing a vehicle-based accelerometer signal to generate the load estimation for the one vehicle tire.

13 . The method according to claim 10 , further comprising substantially continuously updating the model-derived optimal tire slip ratio estimation during an operation of the vehicle to adjust for changes in the tire-specific information.

14 . The method according to claim 13 , further comprising using the updated optimal tire slip ratio estimation in at least one control system of the vehicle. This listing of claims will replace all prior versions and listings of claims in the application.

Assignees

• Goodyear Tire & Rubber

Inventors

• Singh Kanwar Bharat
• Veppathur Sivaramakrishnan Srikanth

Classifications

• B60W2400/00

  Indexing codes relating to detected, measured or calculated conditions or factors · CPC title

• G07C5/0808

  Diagnosing performance data (testing of vehicles G01M17/00; testing of electrical installation on vehicles G01R31/005) · CPC title

• B60W40/10 Primary

  related to vehicle motion · CPC title

• B60T8/1725 Primary

  Using tyre sensors, e.g. Sidewall Torsion sensors [SWT] (for tyre pressure and temperature detection B60C23/00) · CPC title

• B60T2240/03

  Tyre sensors · CPC title