To precisely estimate an abrasion state of a tire while taking an influence of temperature into consideration.SOLUTION: A device comprises a rotation speed acquisition part, a drive force acquisition part, a temperature acquisition part, a slip ratio calculation part, an inclination calculation part, an inclination correction part, and an estimation part. The rotation speed acquisition part acquires rotation speeds of tires mounted on a vehicle one after another. The drive force acquisition part acquires drive force of the vehicle one after another. The temperature acquisition part acquires the temperature outside the vehicle. The slip ratio calculation part calculates a slip ratio based upon the rotation speeds of the tires acquired one after another. The inclination calculation part calculates an inclination of the slip ratio to the drive force as a regression coefficient representing linear relation between the slip ratio and drive force based upon many data sets of slip ratios and drive force. The inclination correction part corrects the calculated inclination based upon an index representing temperature dependency of the inclination and temperature at the time of the correction. The estimation part estimates wear states of the tires based upon the corrected inclination.SELECTED DRAWING: Figure 3

    【課題】温度による影響を考慮し、タイヤの摩耗状態を精度よく推定する。【解決手段】装置は、回転速度取得部と、駆動力取得部と、温度取得部と、スリップ比算出部と、傾き算出部と、傾き補正部と、推定部とを備える。回転速度取得部は、車両に装着されたタイヤの回転速度を順次取得する。駆動力取得部は、車両の駆動力を順次取得する。温度取得部は、車両の外部の温度を取得する。スリップ比算出部は、順次取得されるタイヤの回転速度に基づいてスリップ比を算出する。傾き算出部は、スリップ比と駆動力との線形関係を表す回帰係数として、スリップ比及び駆動力の多数のデータセットに基づいて、駆動力に対する前記スリップ比の傾きを算出する。傾き補正部は、傾きの温度依存性を表す指標と、補正時の温度とに基づいて、算出された傾きを補正する。推定部は、補正された傾きに基づいて、タイヤの摩耗状態を推定する。【選択図】図3


    Access

    Download


    Export, share and cite



    Title :

    DEVICE FOR ESTIMATING ABRASION STATE OF TIRE


    Additional title:

    タイヤの摩耗状態を推定する装置


    Contributors:

    Publication date :

    2022-10-20


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    G01M TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES , Prüfen der statischen oder dynamischen Massenverteilung rotierender Teile von Maschinen oder Konstruktionen / B60C VEHICLE TYRES , Fahrzeugreifen




    TIRE ABRASION STATE ESTIMATION DEVICE

    MAEDA YUSUKE | European Patent Office | 2023

    Free access

    TIRE ABRASION DETECTION DEVICE

    SASAKI KATSUYA | European Patent Office | 2024

    Free access

    TIRE ABRASION DETECTION DEVICE

    SUZUKI YOICHIRO / SEKIZAWA TAKATOSHI | European Patent Office | 2020

    Free access

    PNEUMATIC TIRE, TIRE ABRASION MEASURING METHOD, TIRE ABRASION MEASURING SYSTEM, AND SENSOR MODULE

    SETOGAWA HIROTO / OCHI ATSUSHI / NAKAMURA TOKUO et al. | European Patent Office | 2019

    Free access