Fluid-pressure and analogous brake systems – Pipeless valves
Patent
1976-03-18
1977-07-05
Blix, Trygve M.
Fluid-pressure and analogous brake systems
Pipeless valves
235 92FQ, 235 92NT, 235 92AE, 303 95, 303107, 361242, 2351502, B60T 808
Patent
active
040336336
ABSTRACT:
An oscillator is connected to a backward counter to set the backward counter to a count number representative of its frequency of oscillation, the backward counter being stepped down by clock pulses recurring at a frequency high with respect to the cycling rate of the oscillator until it reaches a reference value, for example zero. The difference between the reference value and the count state of the counter when a predetermined counting period has elapsed, as determined by the duration of one cycle of the input signal, forms an error signal which is transmitted over a bi-directional counter to an integrator which, in turn, controls the oscillator. The system is particularly applicable for use in connection with vehicle wheel brake anti-lock arrangements, and permits determination of wheel speed by oscillation of the oscillator as well as acceleration and deceleration by sensing the error signal.
REFERENCES:
patent: 3674318 (1972-07-01), Hickner
patent: 3840277 (1974-10-01), Bouthors
patent: 3843210 (1974-10-01), Portas
Miller Norbert
Przybyla Bernd
Schmidt Peter Jurgen
Blix Trygve M.
Eisenzopf Reinhard J.
Robert & Bosch GmbH
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