STEERING SYSTEM

• Main Authors: NAMIKAWA ISAO, KODERA TAKASHI, SUDA MICHIHISA, AKATSUKA KOSUKE, KUDO YOSHIO
• Format: Patent
• Language: English; Japanese
• Published: 01.08.2022
• Subjects: LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS; MOTOR VEHICLES; PERFORMING OPERATIONS; TRAILERS; TRANSPORTING

To provide a steer-by-wire type steering system by which, when turning angle control by drive assistance is executed, a steering operation intended by a driver is easily reflected in the turning angle control while a steering operation not intended by the driver is prevented from being reflected in the turning angle control.SOLUTION: When a torque sensor value is smaller than or equal to an intervention threshold value, this steering system reflects only the driving assistance target turning angle (a first target turning angle) to a final target turning angle. When the torque sensor value exceeds the intervention threshold value, the steering system increases a reflection ratio (a distribution ratio) of a driver target turning angle (a second target turning angle) to a final target turning angle as the torque sensor value increases, and decreases the reflection ratio of the driver target turning angle to the final target turning angle as the torque sensor value decreases.SELECTED DRAWING: Figure 3 【課題】運転支援による転舵角制御が行われている場合に、運転者の意図しない操舵操作が転舵角制御に反映されるのを抑えつつ、運転者の意図する操舵操作を転舵角制御に反映されやすくするステアバイワイヤ方式の操舵システムを提供する。【解決手段】本操舵システムは、トルクセンサ値が介入閾値以下の場合、運転支援目標転舵角（第１目標転舵角）のみを最終目標転舵角に反映する。トルクセンサ値が介入閾値を超える場合、本操舵システムは、トルクセンサ値が増大するにつれて、ドライバ目標転舵角（第２目標転舵角）の最終目標転舵角への反映率（配分比）を上昇させ、トルクセンサ値が減少するにつれて、ドライバ目標転舵角の最終目標転舵角への反映率を低下させる。【選択図】図３