Fluid-pressure and analogous brake systems – Speed-controlled – Braking pressure demand or braking force desire
Patent
1997-04-29
2000-05-02
Graham, Matthew C.
Fluid-pressure and analogous brake systems
Speed-controlled
Braking pressure demand or braking force desire
303171, 303DIG8, B60T 840
Patent
active
060563729
ABSTRACT:
A braking device of diagonal type having two sub-systems each including a front wheel brake cylinder and a rear wheel brake cylinder which are connected to master cylinder through respective front and rear passages in which are first and second solenoid-operated valves are disposed. The rear passage is connected to a portion of the front passage between the first valve and the front wheel brake cylinder, and a third solenoid-operated valve is disposed in a reservoir passage connecting the rear passage to a reservoir connected to a pump. A controller for controlling the valves and the pump includes a device for alternately opening and closing the third valve in a predetermined switching pattern while the second valve is held open or is alternately opened and closed, whereby the rate of change of the braking pressure in each wheel brake cylinder can be controlled as desired depending upon the switching pattern of the third valve.
REFERENCES:
patent: 4865399 (1989-09-01), Atkins et al.
patent: 5538334 (1996-07-01), Kushi et al.
Chuma Hisakatsu
Ito Shoji
Kamei Shoichi
Graham Matthew C.
Toyota Jidosha & Kabushiki Kaisha
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