VEHICLE STEERING REACTION FORCE TORQUE CONTROL DEVICE

• Main Authors: INOUE SATOSHI, HANDA SATOSHI, SAIGO SHINTARO
• Format: Patent
• Language: English; Japanese
• Published: 07.07.2022
• Subjects: CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE ORDIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS; MOTOR VEHICLES; PERFORMING OPERATIONS; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TOTHE CONTROL OF A PARTICULAR SUB-UNIT; TRAILERS; TRANSPORTING; VEHICLES IN GENERAL

To provide a vehicle automatic steering device which is improved so as to prevent a driver from feeling a sense of discomfort due to a sudden fluctuation in steering reaction force torque even when the curvature radius of a lane cannot be specified in such a situation that a vehicle goes around a curve.SOLUTION: A steering reaction force torque control device calculates a target steering angle θp on the basis of the curvature and vehicle speed of a lane, calculates target steering reaction force torque Tsrt on the basis of a relation between preset target steering reaction force torque and the target steering angle θp, and controls an electric power steering device such that the steering reaction force torque becomes the target steering reaction force torque Tsrt (S40-80, S170). When the lane of the curve cannot be specified on the basis of image information on the front side of the vehicle (S30), the device gradually increases the target steering reaction force torque Tsrt from the target steering reaction force torque at that time to a maximum steering reaction force torque Tsrmax when the steering angle becomes the maximum steering angle θmax when the vehicle goes around a curve (S120-S170).SELECTED DRAWING: Figure 2 【課題】車両がカーブを走行する状況において、車線の曲率半径を特定できない場合でも、操舵反力トルクの急激変動に起因する違和感を運転者が覚えないよう改良された車両用自動操舵装置を提供する。【解決手段】操舵反力トルク制御装置は、車線の曲率及び車速に基づいて目標操舵角θpを演算し、予め設定された目標操舵反力トルクと目標操舵角θpとの関係に基づいて目標操舵反力トルクＴsrtを演算し、操舵反力トルクが目標操舵反力トルクＴsrtになるように電動パワーステアリング装置を制御する（Ｓ４０～８０、Ｓ１７０）。車両前方の画像情報に基づいてカーブの車線を特定することができなくなると（Ｓ３０）、その時点の目標操舵反力トルクから、車両がカーブを走行する際に操舵角が最大操舵角θmaxになるときの最大操舵反力トルクＴsrmaxまで目標操舵反力トルクＴsrtを徐々に増大させる（Ｓ１２０～１７０）。【選択図】図２