Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1991-03-28
1993-01-12
Butler, Douglas C.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
303 962, 303111, 303119R, 303DIG6, 303 963, 303 92, 3031135, 3031191, 303901, B60T 832
Patent
active
051784424
ABSTRACT:
A brake pressure control apparatus having a master cylinder, a front wheel cylinder and a rear wheel cylinder is provided with a brake circuit for connecting the master cylinder to the front wheel cylinder, a normally open valve unit arranged in series with respect to the brake circuit, a return circuit arranged in parallel with respect to the brake circuit, a normally closed valve unit installed in the return circuit, a reservoir unit installed in the return circuit and a pump unit installed in the return circuit. A controlling unit is provided for controlling the operations of the normally open valve unit, the normally closed valve unit and the pump unit so as to regulate the brake pressure. A cut off valve unit is interconnected between the master cylinder and the rear wheel cylinder for cutting off the rear wheel cylinder from the master cylinder while the controlling unit regulates the brake pressure. When the controlling unit is not regulating the brake pressure, the brake pressure is applied from the master cylinder to both the front and rear cylinders. Thus, the front and the rear wheels are braked. When the controlling unit regulates the brake pressure, the cut off valve unit is closed in order to cut off the rear wheel cylinder from the master cylinder.
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Takeuchi Hiroaki
Toda Hiroshi
Aisin Seiki Kabushiki Kaisha
Butler Douglas C.
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