WHEEL LOAD CONTROL METHOD AND WHEEL LOAD CONTROL DEVICE OF VEHICLE

• Main Authors: MIYASHITA NAOKI, SHIOZAWA YUKI
• Format: Patent
• Language: English; Japanese
• Published: 20.08.2020
• Subjects: CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE ORDIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; PERFORMING OPERATIONS; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TOTHE CONTROL OF A PARTICULAR SUB-UNIT; TRANSPORTING; VEHICLES IN GENERAL

To allow a steering frequency to achieve a satisfactory turning behavior in a wide range of a frequency region from a low frequency to a high frequency in a scene in which a vehicle attitude changes.SOLUTION: A wheel load control device for a vehicle includes a wheel load control unit (7) for correcting driving torque from a motor (63) on the basis of prescribed information to perform wheel load control by acceleration and deceleration. A wheel load control method of an electric automobile A1 by the wheel load control unit (7) performs the following procedures. Driver requested driving torque Trq(D) is acquired. Information of vehicle body slip angle velocity β' being change velocity of a vehicle body slip angle β formed between a vehicle body center line and a vehicle traveling direction is acquired. Correction driving torque Trq(c) obtained by correcting the driver-requested driving torque Trq(D) according to the vehicle body slip angle velocity β' is calculated. A wheel load control command for acquiring the correction driving torque Trq(c) is outputted to the motor (63).SELECTED DRAWING: Figure 2 【課題】車両姿勢が変化するシーンにおいて、操舵周波数が低周波数から高周波数までの広範囲の周波数領域にて良好な旋回挙動を実現すること。【解決手段】所定情報に基づいてモータ（６３）からの駆動トルクを補正し、加減速による輪荷重制御を行う輪荷重制御ユニット（７）を備える。輪荷重制御ユニット（７）による電気自動車Ａ１の輪荷重制御方法を、以下の手順としている。ドライバ要求駆動トルクTrq(D)を取得する。車体中心線と車両進行方向とがなす車体スリップ角βの変化速度である車体スリップ角速度β'の情報を取得する。車体スリップ角速度β'に応じてドライバ要求駆動トルクTrq(D)を補正した補正駆動トルクTrq(c)を算出する。補正駆動トルクTrq(c)を得る輪荷重制御指令をモータ（６３）へ出力する。【選択図】図２