Tire characteristic judging method and tire characteristic judging device
First Claim
1. A tire characteristic judging method of judging a tire characteristic, comprising the steps of:
- acquiring each of applied load information representing a load applied to a tire and cornering force information representing a cornering force generated in the tire in time series while the tire is rolling at a predetermined rolling speed to be in contact with a road surface with a predetermined slip angle being applied to the tire;
calculating an applied load variation amount representing a time-series variation of the applied load information from the acquired time-series applied load information and a cornering force variation amount representing a time-series variation of the cornering force information from the acquired time-series cornering force information;
obtaining an evaluation value determined based on the applied load variation amount and the cornering force variation amount; and
comparing the evaluation value and a preset reference value with each other and judging whether or not the tire satisfies a desired characteristic according to a result of comparison.
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Abstract
A tire characteristic judging device judges a tire characteristic in the following way. At first, a load applied to a tire and a cornering force generated in the tire in time series while the tire is rolling are acquired. Then, an applied load variation amount is calculated from the acquired time-series applied load information and a cornering force variation amount calculated from the acquired time-series cornering force information. Next, an evaluation value is calculated based on the applied load variation amount and the cornering force variation amount. The calculated evaluation value and a preset reference value are compared with each other and whether or not the tire satisfies a desired characteristic is judged according to a result of comparison.
12 Citations
15 Claims
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1. A tire characteristic judging method of judging a tire characteristic, comprising the steps of:
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acquiring each of applied load information representing a load applied to a tire and cornering force information representing a cornering force generated in the tire in time series while the tire is rolling at a predetermined rolling speed to be in contact with a road surface with a predetermined slip angle being applied to the tire; calculating an applied load variation amount representing a time-series variation of the applied load information from the acquired time-series applied load information and a cornering force variation amount representing a time-series variation of the cornering force information from the acquired time-series cornering force information; obtaining an evaluation value determined based on the applied load variation amount and the cornering force variation amount; and comparing the evaluation value and a preset reference value with each other and judging whether or not the tire satisfies a desired characteristic according to a result of comparison. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A tire characteristic judging device for judging a tire characteristic, comprising:
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an information acquisition portion for acquiring each of applied load information representing a load applied to a tire and cornering force information representing a cornering force generated in the tire in time series while the tire is rolling at a predetermined rolling speed to be in contact with a road surface with a predetermined slip angle being applied to the tire; a variation amount calculating portion for calculating an applied load variation amount representing a time-series variation of the applied load information from the acquired time-series applied load information and a cornering force variation amount representing a time-series variation of the cornering force information from the acquired time-series cornering force information; an evaluation value deriving portion for calculating an evaluation value determined based on the applied load variation amount and the cornering force variation amount; and a judgment portion for comparing the evaluation value and a preset reference value with each other and judging whether or not the tire satisfies a desired characteristic according to a result of comparison. - View Dependent Claims (14, 15)
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Specification