Bacon & Thomas
Antilock system for wheeled vehicles
 An antilock system for wheeled vehicles, wherein a reference velocity signal waveform which is obtained without differentiating the actual wheel velocity signal, is compared with the latter, thereby determining a point of time when brake pressure is to be relieved and/or a point of time when such brake pressure relief is to be stopped. Furthermore, in case an anomalous drop occurs in the wheel velocity, an additional reference velocity signal is obtained on the basis of the actual wheel velocity signal but without differentiating the latter, and it is compared with the actual wheel velocity signal, whereby the point of time when the brake pressure relief is to be stopped can be changed so as to cope with the anomalous drop of the wheel velocity. 
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inventional additional inventional inventional inventional
Masashi
Saito