To accurately estimate a tire contact length with a simple configuration.SOLUTION: A tire state quantity estimation device (1) acquires a road surface μ indicating a friction coefficient between a tire and a road surface, detects a self-aligning torque generated on a ground surface of the tire, detects longitudinal force Fx, lateral force Fy, and load on wheel Fz, which are generated on the tire (11), derives generation μ in a moving state using detection results (12), derives a grip margin ε from the road surface μ and the generation μ (13), derives a physical quantity MF from the longitudinal force Fx and the grip margin ε (14), and estimates a tire contact length L on the basis of the self-aligning torque, the lateral force Fy, and the physical quantity MF (16).SELECTED DRAWING: Figure 1
【課題】簡単な構成で、正確にタイヤ接地長を推定する。【解決手段】タイヤ状態量推定装置(1)は、タイヤと路面との間の摩擦係数を示す路面μを取得し、タイヤの接地面に発生するセルフアライニングトルクを検出し、タイヤに発生する前後力Fx、横力Fy及び輪荷重Fzを検出し(11)、検出結果を用いて移動状態における発生μを導出し(12)、路面μと発生μとからグリップ余裕度εを導出し(13)、前後力Fxおよびグリップ余裕度εから物理量MFを導出し(14)、セルフアライニングトルク、横力Fyおよび物理量MFに基づいて、タイヤ接地長Lを推定する(16)。【選択図】図1
TIRE STATE QUANTITY ESTIMATION DEVICE, TIRE STATE QUANTITY ESTIMATION METHOD, AND TIRE STATE QUANTITY ESTIMATION PROGRAM
タイヤ状態量推定装置、タイヤ状態量推定方法及びタイヤ状態量推定プログラム
2021-10-11
Patent
Electronic Resource
Japanese
IPC: | G01M TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES , Prüfen der statischen oder dynamischen Massenverteilung rotierender Teile von Maschinen oder Konstruktionen / B60W CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION , Gemeinsame Steuerung oder Regelung von Fahrzeug-Unteraggregaten verschiedenen Typs oder verschiedener Funktion |
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