Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1990-08-21
1992-08-18
Graham, Matthew C.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
303113AP, 303115R, B60T 840, B60T 866
Patent
active
051393166
ABSTRACT:
A tandem liquid pressure control device for an anti-lock brake system includes a tandem liquid pressure control cylinder disposed between a tandem master cylinder and the vehicle brakes, and a mechanism for driving the liquid pressure control means for movement in a direction causing a reduction or elevation in braking liquid pressure for an anti-lock operation. The liquid pressure control cylinder contains a first liquid pressure control piston adapted to be driven by the driving mechanism for movement in the direction causing pressure reduction or elevation and a second liquid pressure control piston mounted coaxially with the first piston and movably in a floating way, and defines a first and a second liquid pressure control chambers in which the pressures of the braking liquid are controlled by the movement of the first and second pistons. A solenoid valve is provided for cutting off the supply of the braking liquid from the chambers of the master cylinder to the brakes through the first and second liquid pressure control chambers in response to a cutoff signal inputted from an external source, before the first and second pistons are moved.
REFERENCES:
patent: 3989313 (1976-02-01), Toms
patent: 4600245 (1986-07-01), Watanabe
patent: 4890890 (1990-01-01), Leiber
Miyama Yasuhiro
Watanabe Mamoru
Ballato Josie A.
Graham Matthew C.
Miyako Jidosha Kogyo Kabushikigaisha
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