To secure the accuracy of an estimated vehicle body speed of a vehicle that performs four-wheel drive.SOLUTION: A vehicle speed estimation method is applied to a vehicle that performs four-wheel driving. The vehicle body speed estimation method includes the steps of: (A) acquiring an estimated vehicle body speed, based on a wheel speed or longitudinal acceleration of the vehicle; (B) determining whether or not operating conditions are satisfied that include at least a case that the estimated vehicle body speed is higher than an operation determination speed; (C) executing, when the operating conditions are satisfied, torque restriction for reducing torque of some of wheels of the vehicle; (D) determining whether or not a terminating conditions are satisfied that include a case that the estimated vehicle body speed becomes equal to or lower than a terminating determination speed or a case that a state that the wheel accelerations of the some of the wheels are equal to or higher than zero continues for a predetermined time; (E) terminating the torque restriction when the terminating conditions are satisfied.SELECTED DRAWING: Figure 2

    【課題】4輪駆動を行う車両の推定車体速度の精度を確保すること。【解決手段】車体速度推定方法は、4輪駆動を行う車両に適用される。車体速度推定方法は、(A)車両の車輪速あるいは前後加速度に基づいて推定車体速度を取得する処理と、(B)推定車体速度が作動判定速度よりも高いことを少なくとも含む作動条件が成立するか否かを判定する処理と、(C)作動条件が成立した場合、車両の一部の車輪のトルクを低下させるトルク制限を実行する処理と、(D)推定車体速度が終了判定速度以下になること、あるいは、前記一部の車輪の車輪加速度がゼロより大きい状態が一定時間継続すること、を含む終了条件が成立するか否かを判定する処理と、(E)終了条件が成立した場合、トルク制限を終了させる処理と、を含む。【選択図】図2


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    Title :

    VEHICLE BODY SPEED ESTIMATION METHOD AND VEHICLE BODY SPEED ESTIMATION DEVICE


    Additional title:

    車体速度推定方法及び車体速度推定装置


    Contributors:

    Publication date :

    2022-12-14


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    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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