Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1998-07-29
2000-09-19
Oberleitner, Robert J.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
3031134, 303166, B60T 840
Patent
active
06120112&
ABSTRACT:
A brake pressure control device for a vehicle includes a wheel brake, a reservoir, a master cylinder, an accumulator which stores the fluid pressure at a pressure higher than the fluid pressure generated by the master cylinder, and a fluid pump which discharges fluid pressure higher than the fluid pressure in the accumulator. A first fluid conduit connects the master cylinder to the wheel brake, a second fluid conduit connects the fluid pump to the wheel brake, a third fluid conduit connects the fluid pump to the accumulator, a fourth fluid conduit connects the accumulator to the suction port of the fluid pump, and a fifth fluid conduit connects the wheel brake to the reservoir. A first valve opens and closes the first fluid conduit, a second valve opens and closes the second fluid conduit, a third valve opens and closes the third fluid conduit, a fourth valve opens and closes the fourth fluid conduit, and a fifth valve opens and closes the fifth fluid conduit. A foot force sensor detects the force applied to the brake pedal, a vehicle deceleration sensor senses the vehicle deceleration, and a controller estimates a target deceleration of the vehicle based on the foot force detected by the foot force sensor. The controller supplies fluid pressure to the wheel brake by controlling the first valve, the second valve, the fourth valve, the fifth valve and the fluid pump so that the vehicle deceleration agrees with the target deceleration of the vehicle estimated by the controller and controls the third valve and the fluid pump in order to store the fluid pressure in the accumulator.
REFERENCES:
patent: 4778223 (1988-10-01), Inoue
patent: 4989925 (1991-02-01), Kohno
patent: 5624164 (1997-04-01), Tozu et al.
patent: 5658057 (1997-08-01), Ohnuma et al.
patent: 5921638 (1999-07-01), Higashimura et al.
Aizawa Hiroaki
Kusano Akihito
Toda Hiroshi
Aisin Seiki Kabushiki Kaisha
Kramer Devon
Oberleitner Robert J.
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