Vehicle having tire wear evaluation system
First Claim
1. A vehicle having a driven wheel and a driving wheel to which tires are attached, comprising:
- a revolution speed detector for detecting revolution speeds of the driven wheel and the driving wheel and outputting detected revolution speed data;
a wheel speed detector for detecting wheel speeds of the driven wheel and the driving wheel based on the detected revolution speed data of the driven wheel and the driving wheel and outputting the detected wheel speed data;
a wheel speed ratio detector for detecting a wheel speed ratio between the detected wheel speed of the driven wheel and the detected wheel speed of the driving wheel based on the detected wheel speed data of the driven wheel and the driving wheel;
a tire condition evaluator for outputting an evaluation result indicating that the tire attached to the driven wheel or the driving wheel is worn or the tires attached to the driven wheel and the driving wheel are worn, when a frequency of the wheel speed ratio exceeding a prescribed range is higher than a preset threshold;
a payload detector for detecting a payload; and
a wear detection count threshold calculator for outputting the threshold;
wherein the wear detection count threshold calculator adjusts the threshold according to detected payload data outputted by the payload detector.
1 Assignment
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Accused Products
Abstract
A vehicle which evaluates tire wear properly even in a road condition that tires easily slip or lock up. The vehicle, which has a driven wheel and a driving wheel with tires attached thereto, includes: a revolution speed detector for detecting revolution speeds of the driven and driving wheels; a wheel speed detector for detecting wheel speeds of the driven and driving wheels based on the detected revolution speed data of the driven and driving wheels; a wheel speed ratio detector for detecting a wheel speed ratio between the driven and driving wheels based on the detected wheel speed data of the driven and driving wheels; and a tire condition evaluator for outputting an evaluation result indicating that the tire(s) attached to the driven wheel and/or driving wheel is(are) worn when the wheel speed ratio is higher than a preset threshold.
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Citations
10 Claims
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1. A vehicle having a driven wheel and a driving wheel to which tires are attached, comprising:
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a revolution speed detector for detecting revolution speeds of the driven wheel and the driving wheel and outputting detected revolution speed data; a wheel speed detector for detecting wheel speeds of the driven wheel and the driving wheel based on the detected revolution speed data of the driven wheel and the driving wheel and outputting the detected wheel speed data; a wheel speed ratio detector for detecting a wheel speed ratio between the detected wheel speed of the driven wheel and the detected wheel speed of the driving wheel based on the detected wheel speed data of the driven wheel and the driving wheel; a tire condition evaluator for outputting an evaluation result indicating that the tire attached to the driven wheel or the driving wheel is worn or the tires attached to the driven wheel and the driving wheel are worn, when a frequency of the wheel speed ratio exceeding a prescribed range is higher than a preset threshold; a payload detector for detecting a payload; and a wear detection count threshold calculator for outputting the threshold; wherein the wear detection count threshold calculator adjusts the threshold according to detected payload data outputted by the payload detector. - View Dependent Claims (2, 3, 4, 5)
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6. A vehicle having a driven wheel and a driving wheel to which tires are attached, comprising:
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a revolution speed detector for detecting revolution speeds of the driven wheel and the driving wheel and outputting detected revolution speed data; a wheel speed detector for detecting wheel speeds of the driven wheel and the driving wheel based on the detected revolution speed data of the driven wheel and the driving wheel and outputting the detected wheel speed data; a wheel speed ratio detector for detecting a wheel speed ratio between the detected wheel speed of the driven wheel and the detected wheel speed of the driving wheel based on the detected wheel speed data of the driven wheel and the driving wheel; a tire condition evaluator for outputting an evaluation result indicating that the tire attached to the driven wheel or the driving wheel is worn or the tires attached to the driven wheel and the driving wheel are worn, when a frequency of the wheel speed ratio exceeding a prescribed range is higher than a preset threshold; a road surface condition detector for detecting a surface condition of the road on which it is running; and a wear detection count threshold calculator for outputting the threshold; wherein the wear detection count threshold calculator adjusts the threshold according to road surface condition information outputted by the road surface condition detector. - View Dependent Claims (7, 8, 9, 10)
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Specification