Method and apparatus for predicting vehicle speed in braking con

Details Method and apparatus for predicting vehicle speed in braking con Method and apparatus for predicting vehicle speed in braking con

1976-10-06

1978-05-16

Kunin, Stephen G.

Fluid-pressure and analogous brake systems

Speed-controlled

Having a valve system responsive to a wheel lock signal

188181C, 361238, B60T 810

Patent

active

040895645

ABSTRACT:
A method for predicting vehicle speed in a braking control system for wheeled vehicles, where a signal representing wheel speed before braking is used to trigger charging of a capacitor in an electronic unit. The capacitor voltage is reduced during braking in response to a predetermined retardation value in order to correspond to an instantaneous value for the vehicle speed. The vehicle speed signal is compared with a wheel speed signal, which comparison triggers, when the wheel speed signal exceeds the vehicle speed signal, up-dating of the capacitor voltage level to a value corresponding to the actual wheel speed signal. When up-dating the vehicle speed signal, the preselected retardation value is gradually lowered by a value corresponding to the magnitude of the actual up-dating.

REFERENCES:
patent: 3650575 (1972-03-01), Okamoto
patent: 3653727 (1972-04-01), Kullberg et al.
patent: 3744849 (1973-07-01), Jonason et al.
patent: 3768873 (1973-10-01), Hirzel
patent: 3804470 (1974-04-01), Slavin et al.
patent: 3811739 (1974-05-01), Nakamura et al.
patent: 3847447 (1974-11-01), Needham et al.
patent: 3848933 (1974-11-01), Ochiai
patent: 3871715 (1975-03-01), Hikida et al.

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