Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1977-09-15
1979-06-12
Kunin, Stephen G.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
188181C, 307233B, 361238, 364426, B60T 810
Patent
active
041578503
ABSTRACT:
An electronic antiskid control device which comprises a frequency multiplier of the phase locked-loop type, which receives repetitive pulses of predetermined frequency representing the speed of one wheel. The phase locked-loop multiplier normally outputs a second pulse signal, the frequency of which is normally equal to the frequency of the wheel speed signal multiplied by a given number. A digital counter which is periodically reset at a frequency equal to that of the wheel speed signal measures the number of pulses of the second pulse signal during each period. The measured number is transfered into a memory element and calculating apparatus responsive to the value stored in the memory element control an antiskid cycle. In operation under normal conditions, the number stored in the memory element is constant and has no action on the calculating apparatus. In case of high deceleration or acceleration, the stored number momentarily deviates from its constant value so as to indicate a predetermined skid and control actuation of the antiskid device.
REFERENCES:
patent: 3586385 (1971-06-01), Florus et al.
patent: 3650575 (1972-03-01), Okamoto
patent: 3701568 (1972-10-01), Lewis et al.
patent: 3780346 (1973-12-01), Gagnon
patent: 3838889 (1974-10-01), Miller
patent: 3953773 (1976-04-01), Fukumori
patent: 3985396 (1976-10-01), Kuwana et al.
patent: 4021681 (1977-05-01), Miesterfeld
patent: 4050747 (1977-09-01), Ruhnau et al.
Decker Ken C.
Kunin Stephen G.
Schoenle Paul David
Societe Anonyme D.B.A.
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