Tire cornering stiffness estimation system and method

Patent metadata

Field	Value
Publication number	US-2016146706-A1
Application number	US-201414549845-A
Country	US
Kind code	A1
Filing date	Nov 21, 2014
Priority date	Nov 21, 2014
Publication date	May 26, 2016
Grant date	—

Abstract

A tire cornering stiffness estimation system and method includes multiple tire-affixed sensors mounted to a supportive vehicle tire for operably measuring tire-specific parameters and generating tire-specific information relating tire pressure, temperature, wear state, tire identification and tire loading. One or more accelerometer(s) are mounted to the hub supporting the tire to generate a hub accelerometer signal. A model-based tire cornering stiffness estimator is included to generate a model-derived tire cornering stiffness estimation based upon the hub accelerometer signal adapted by the tire-specific information.

First claim

What is claimed is:

1 . A tire cornering stiffness 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 measurable parameters; a plurality of tire-affixed sensors mounted to the tire operably measuring the tire-specific parameters to generate tire-specific information; at least one accelerometer mounted to the hub and generating a hub accelerometer signal; a model-based tire cornering stiffness estimator operable to generate a model-derived tire cornering stiffness estimation based upon the hub accelerometer signal adapted by the tire-specific information.

2 . The cornering stiffness estimation system of claim 1 , wherein the model-based tire cornering stiffness estimator operably conducts a frequency domain spectral analysis of the hub accelerometer signal.

3 . The cornering stiffness estimation system of claim 1 , wherein the tire cornering stiffness estimator at least employs as estimator inputs:
a load estimation for the one vehicle tire; temperature of the one vehicle tire; air pressure within a cavity of the one vehicle tire; a tire identification identifying the one vehicle tire by tire-type; a wear estimation on a tread of the one vehicle tire.

4 . The cornering system estimation of claim 3 , wherein the hub accelerometer signal is provided to the model-based tire cornering stiffness estimator from a vehicle CAN-bus.

5 . A tire cornering stiffness 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 plurality of tire-affixed sensors mounted to the tire operably measuring the tire-specific parameters to generate tire-specific information; at least one accelerometer mounted to the hub and generating a vehicle CAN-bus hub accelerometer signal; a model-based tire cornering stiffness estimator operable to generate a model-derived tire cornering stiffness estimation based upon the hub accelerometer signal adapted by the tire-specific information.

6 . The cornering stiffness estimation system of claim 5 , wherein the model-based tire cornering stiffness estimator operably conducts a frequency domain spectral analysis of the hub accelerometer signal.

7 . The cornering stiffness estimation system of claim 6 , wherein the tire cornering stiffness estimator at least employs as estimator inputs:
a load estimation for the one vehicle tire; temperature of the one vehicle tire; air pressure within a cavity of the one vehicle tire; a tire identification identifying the one vehicle tire by tire-type; a wear estimation on a tread of the one vehicle tire.

8 . A method of estimating tire cornering stiffness comprising:
equipping a vehicle with 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 measurable parameters; affixing a plurality of tire-based sensors to the tire to operably measure the tire-specific parameters and thereby generate tire-specific information; mounting at least one accelerometer to the hub to operably generate a hub accelerometer signal; generating from a model-based tire cornering stiffness estimator a model-derived tire cornering stiffness estimation based upon the hub accelerometer signal adapted by the tire-specific information.

9 . The method of claim 8 , wherein further comprising conducting a frequency domain spectral analysis of the hub accelerometer signal by the model-based tire cornering stiffness estimator.

10 . The method of claim 9 , wherein further comprising providing the tire cornering stiffness estimator as inputs:
a load estimation for the one vehicle tire; temperature of the one vehicle tire; air pressure within a cavity of the one vehicle tire; a tire identification identifying the one vehicle tire by tire-type; a wear estimation on a tread of the one vehicle tire.

11 . The method of claim 10 , wherein further comprising obtaining the hub accelerometer signal from a vehicle CAN-bus.

Assignees

• Goodyear Tire & Rubber

Inventors

• Singh Kanwar Bharat

Classifications

• B60T8/00

  Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force (by changing number of effective brake cylinders in power brake systems B60T17/10) · CPC title

• G01M17/02 Primary

  Tyres · CPC title

• B60C99/00

  Subject matter not provided for in other groups of this subclass · CPC title

• G01N3/56

  Investigating resistance to wear or abrasion · CPC title

• B60C2019/004

  Tyre sensors other than for detecting tyre pressure · CPC title