Boots – shoes – and leggings
Patent
1986-12-04
1989-02-14
Chin, Gary
Boots, shoes, and leggings
340 52C, 303DIG3, B60T 800
Patent
active
048051055
ABSTRACT:
A brake control system has a controller (52, 53, 54) including hysteresis. To prevent over-shoot of control operation if a comparison between actual braking pressure (P.sub.act) and commanded pressure (P.sub.com) is applied to control valves which, for example, operate pneumatically, so that the brakes will not instantaneously respond, a difference pressure threshold (.DELTA.P.sub.G) is determined and, when the difference pressure level is passed by the difference pressure signal, the valves are controlled to operate in pulse operation, in which each pressure pulse (T.sub.E) is followed by a quieting or pressure-OFF time (T.sub.BER). The pulse sequence and the timing of pulses and pulse gaps is controllable in accordance with pressure levels, operating parameters, pressure difference levels and the like.
REFERENCES:
patent: 4320459 (1982-03-01), Lindemann et al.
patent: 4466066 (1984-08-01), Saumweber et al.
patent: 4489382 (1984-12-01), Jonner et al.
patent: 4585280 (1986-04-01), Leiber
patent: 4591986 (1986-05-01), Nakajima et al.
patent: 4637663 (1987-01-01), Matsuda
patent: 4660896 (1987-04-01), Matsuda
Domann Helmut
Jung Erich
Maurer Franz
Stahl Manfred
Weiss Eberhard
Chin Gary
Robert & Bosch GmbH
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