Method and device for identifying kind of tire
First Claim
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1. A tire identifying method comprising:
- (a) measuring respective rotation speeds of four tires fitted to wheels of a vehicle;
(b) calculating a ratio of front wheel rotation speed to rear wheel rotation speed using the measured rotation speeds;
(c) preparing a function of speed and front-rear wheel speed ratio on the basis of data previously measured using a known kind of tire; and
(d) identifying the kind of tire fitted to the wheels of the vehicle by comparing the calculated ratio with the prepared function.
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Abstract
A tire identifying method comprising measuring each rotation speed of four tires fitted to wheels of a vehicle; calculating a ratio of front wheel rotation speed to rear wheel rotation speed from the measured value; and identifying the kind of tire fitted by comparing the calculated front-rear wheel ratio with a function of speed and front-rear wheel ratio prepared on the basis of data from a tire whose kind is previously known. Utilization might be made of the means for measuring the rotation of tire such as ABS which is provided on the vehicle control device, thus requiring small initial cost.
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Citations
12 Claims
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1. A tire identifying method comprising:
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(a) measuring respective rotation speeds of four tires fitted to wheels of a vehicle; (b) calculating a ratio of front wheel rotation speed to rear wheel rotation speed using the measured rotation speeds; (c) preparing a function of speed and front-rear wheel speed ratio on the basis of data previously measured using a known kind of tire; and (d) identifying the kind of tire fitted to the wheels of the vehicle by comparing the calculated ratio with the prepared function. - View Dependent Claims (2, 3)
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4. A tire identifying method comprising:
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(a) measuring respective rotation speeds of four tires fitted to wheels of a vehicle; (b) measuring front-rear direction acceleration of the vehicle; (c) calculating a ratio of front wheel rotation speed to rear wheel rotation speed using the measured rotation speeds; (d) preparing a function of speed and front-rear wheel speed ratio on the basis of data previously measured using a known kind of tire; and (e) identifying the kind of tire fitted to the wheels of the vehicle by comparing the calculated ratio with the prepared function of acceleration and front-rear wheel ratio prepared on the basis of data of the front-rear ratio by the predetermined acceleration, sequentially from a tire which kind is previously known. - View Dependent Claims (5, 6)
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7. A tire identifying device comprising:
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(a) means for measuring respective rotation speeds of four tires fitted to wheels of a vehicle; (b) means for calculating a ratio of front wheel rotation speed to rear wheel rotation speed using the measured rotation speeds; (c) means for preparing a function of speed and front-rear wheel speed ratio on the basis of data previously measured using a known kind of tire; and (d) means for identifying the kind of tire fitted to the wheels of the vehicle by comparing the calculated ratio with the prepared function. - View Dependent Claims (8, 12)
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9. A tire identifying device comprising:
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(a) means for measuring respective rotation speeds of four tires fitted to wheels of a vehicle; (b) front-rear direction acceleration measuring means for measuring front-rear direction acceleration of the vehicle; (c) means for calculating a ratio of front wheel rotation speed using the measured rotation speeds; (d) preparing a function of speed and front-rear wheel speed ratio on the basis of data previously measured using a known kind of tire; and (e) identifying the kind of tire fitted to the wheels of the vehicle by comparing the calculated front-rear wheel rotation with a function of acceleration and said front-rear wheel ratio on the basis of data from said tire, which kind is previously known. - View Dependent Claims (10, 11)
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Specification