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    • 17. 发明授权
    • Control of ABS threshold without accompanying reduction of brake pressure
    • 控制ABS阈值,同时降低制动压力
    • US5249850A
    • 1993-10-05
    • US791735
    • 1991-09-30
    • Wolfgang KampfmannDieter VogesVolker Braschel
    • Wolfgang KampfmannDieter VogesVolker Braschel
    • B60T8/66B60T8/173B60T8/1761B60T8/32B60T8/58B60T8/78B60T8/92
    • B60T8/173
    • In a method of controlling the brake pressure of a vehicle brake system equipped with anti-lock protection it is provided to measure the slip and/or rotational retardation of a wheel whose brake is applied and to compare each measured value with a given threshold value so as to lower the brake pressure if the threshold value proves to have been surpassed. Undesired pressure reductions can be avoided by increasing the threshold value for given periods of time from a basic value (S.sub.G) and subsequently decreasing it again. At a point in time T.sub.1 at which the rotational retardation of the braked wheel is greater than a value corresponding to a physically feasible slowdown of the vehicle the threshold value is increased abruptly, to be decreased thereafter according to a predetermined function of time. During the lowering of the threshold value the change in speed of the retarded wheel is measured over given intervals of time .DELTA.T and compared with the instantaneous higher threshold value. If the comparison demonstrates that the change in speed in question is greater than the instantaneous raise in threshold value, the threshold value is reduced to the basic value (S.sub. G).
    • 在控制具有防抱死保护的车辆制动系统的制动压力的方法中,提供了用于测量施加制动器的车轮的滑移和/或旋转延迟并将每个测量值与给定阈值进行比较的方法 如果阈值被证明已被超越,则降低制动压力。 通过从基本值(SG)增加给定时间段的阈值并随后再次减少,可以避免不期望的压力降低。 在制动轮的旋转延迟大于对应于物理上可行的车辆减速的值的时间点T1,阈值突然增加,此后根据预定的时间功能而减小。 在降低阈值期间,在给定的时间间隔DELTA T上测量延迟轮的速度变化,并与瞬时更高的阈值进行比较。 如果比较表明所讨论的速度变化大于阈值瞬时提升,则阈值降低到基本值(S G)。