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    • 7. 发明授权
    • Anti-skid control braking system for four-wheel drive vehicle with
feature of determination of drive state
    • 用于四轮驱动车辆的防滑控制制动系统,具有确定驱动状态的特点
    • US5941613A
    • 1999-08-24
    • US132484
    • 1998-08-11
    • Yukio Tagawa
    • Yukio Tagawa
    • B60K23/08B60T8/1769B60T8/32
    • B60K23/0808B60T8/1769B60T8/322
    • In an anti-skid control braking system for a four-wheel drive vehicle with a feature of determination of a road wheel drive state according to the present invention, a determination of an actual drive state of the four-wheel drive vehicle, namely, a determination of whether the four-wheel drive vehicle is running in a two-wheel drive state in which a driving force generated by an engine via a power transmission is distributed through a transfer only toward mainly driven road wheels (rear road wheel pair) or in a four-wheel drive state in which the driving force is distributed through the transfer toward the mainly driven road wheels and secondarily driven road wheels (front road wheel pair) at a predetermined distribution ratio is based on at least one of front and left road wheel speeds (V.sub.WFL, V.sub.WFR, and V.sub.WR) which is detected for the rear road wheel pair without installation of a special-purpose switch (or sensor) especially used to detect the drive state of the four-wheel drive vehicle. In an embodiment, a variation rate (V.sub.WR ') in the rear road wheel speed with respect to time is monitored to determine the actual road wheel drive state.
    • 在根据本发明的具有确定轮轮驱动状态的特征的用于四轮驱动车辆的防滑控制制动系统中,确定四轮驱动车辆的实际驱动状态,即, 确定四轮驱动车辆是否在两轮驱动状态下行驶,其中由发动机经由动力传递产生的驱动力仅通过仅主要被驱动的车轮(后轮对)的传递分配 驱动力以预定的分配比通过传递分配到主要驱动的车轮和二次驱动的车轮(前轮车对)的四轮驱动状态基于前轮和左车轮中的至少一个 在没有安装特别用于检测四轮驱动车辆(或传感器)的驱动状态的专用开关(或传感器)的情况下,检测到后轮系对的速度(VWFL,VWFR和VWR) le。 在一个实施例中,监测后轮速度相对于时间的变化率(VWR'),以确定实际的车轮驱动状态。