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    • 5. 发明授权
    • Traction control using dynamic tire friction potential
    • 牵引力控制采用动态轮胎摩擦力
    • US07451034B2
    • 2008-11-11
    • US11373076
    • 2006-03-10
    • Josko DeurJahan AsgariDavor Hrovat
    • Josko DeurJahan AsgariDavor Hrovat
    • B60K28/16
    • B60T8/175
    • A method for controlling slip of a driven wheel on low friction surfaces includes determining the current magnitude of static tire friction potential, current magnitude of maximum dynamic tire friction potential, and magnitude of tire torque demanded by an operator of the vehicle. A lower magnitude of commanded tire force is set less than the estimated current magnitude of static tire friction potential. The magnitude of demanded wheel torque and the estimated current magnitude of maximum dynamic tire friction potential are used to set an upper magnitude of commanded tire force. The magnitude of commanded tire force is changed in a sequence of saw-tooth pulses, each pulse including an increasing ramp of tire force from the lower commanded tire force to the upper commanded tire force, the ramp having a predetermined slope, and a step that reduces the magnitude of commanded tire force between each pulse to the lower commanded tire force. An adaptation mechanism is used to adjust the saw-tooth signal parameters with respect to road condition changes.
    • 用于控制在低摩擦表面上的从动轮的滑动的方法包括确定静态轮胎摩擦电势的当前大小,最大动态轮胎摩擦电位的当前幅度以及车辆操作者所要求的轮胎扭矩的大小。 指定的轮胎力的较小幅度被设定为小于静态轮胎摩擦电势的估计电流大小。 使用要求车轮转矩的大小和最大动态轮胎摩擦电位的估计电流大小来设定指令轮胎力的上限值。 指令的轮胎力的大小以锯齿脉冲的顺序改变,每个脉冲包括轮胎力从较低的指令轮胎力到上限的轮胎力的增加的斜坡,斜坡具有预定的斜率,以及步骤 将每个脉冲之间的指令轮胎力的大小减小到较低的指令轮胎力。 使用适应机构来调整相对于道路状况变化的锯齿信号参数。