Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1998-09-28
2000-05-23
Graham, Matthew C.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
303DIG11, 138 31, B60T 838
Patent
active
060658142
ABSTRACT:
A vehicle brake control device includes a wheel cylinder mounted on a wheel of a vehicle, a master cylinder which generates a brake fluid pressure according to the amount of operation of the brake pedal and supplies the brake fluid pressure to the wheel cylinder, a pump which draws brake fluid out of a reservoir for generating a brake fluid pressure, and an accumulator which stores the brake fluid pressure generated by the pump. A change-over valve is disposed between the master cylinder and the wheel cylinder to disconnect the wheel cylinder from the master cylinder during its non-operational condition and to connect the wheel cylinder to the master cylinder during its operational condition A fluid conduit connects the accumulator to the wheel cylinder during the non-operational condition of the change-over valve, and a regulator is disposed on the fluid conduit to regulate the fluid pressure in the accumulator according to the amount of brake pedal operation. The accumulator includes a hollow case having an interior, a dividing member which divides the cylinder into a gas chamber which stores gas and a fluid chamber in which the brake fluid pressure generated by the pump is stored, and an open air chamber disposed on the dividing member.
REFERENCES:
patent: 4256145 (1981-03-01), Phillips
patent: 5806939 (1998-09-01), Feigel et al.
Kobe, "Modern Brake Through", Automotive Industry, Kelsey-Hayes Co., Sep. 1996, pp. 118-119.
Nishii Michiharu
Oishi Masaki
Aisin Seiki Kabushiki Kaisha
Graham Matthew C.
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