Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1990-03-12
1991-02-26
Butler, Douglas C.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
188358, 303 52, 303116, 303119, B60T 832
Patent
active
049956779
ABSTRACT:
In a hydraulic braking pressure control system comprising an auxiliary hydraulic pressure generator connected to a brake device for generating a hydraulic pressure depending upon a braking operation by a brake pedal; a supply source; a supply source pressure control device controlling the pressure from the supply source in accordance with the braking operation by the brake pedal; pressure transmitting device interposed in a hydraulic pressure path extending from the supply source via the supply source pressure control device to the brake device arranged to permit the transmission of the hydraulic pressure output from the supply source pressure control device to the brake device when the hydraulic pressure in the supply source is normal and to cut off the flowing of a working fluid from the brake device toward the supply source when the hydraulic pressure in the supply source is abnormally reduced; and an on-off valve interposed between the auxiliary hydraulic pressure generator and the brake device, having a pilot chamber leading to an output port of the supply source pressure control device, and adapted to be closed in response to an increase in the hydraulic pressure in the pilot chamber. The on-off valve is closed by rising of the output hydraulic pressure from the supply source pressure control device prior to rising of the output hydraulic pressure from the auxiliary hydraulic pressure generator during a braking operation by the brake pedal.
REFERENCES:
patent: 4444440 (1984-04-01), Farr
patent: 4892361 (1990-01-01), Nishii et al.
patent: 4894555 (1990-01-01), Watanabe et al.
Matsuda Shohei
Sato Tsuyoshi
Suzuki Jiro
Tashima Kazutoshi
Butler Douglas C.
Honda Giken Kogyo Kabushiki Kaisha
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