Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1991-09-26
1993-06-22
Graham, Matthew C.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
3031171, B60T 836
Patent
active
052211290
ABSTRACT:
A discharge passage communicating a brake cylinder and a low-pressure accumulator is provided with a second orifice. Owing to a pressure differential between pressure upstream of the second orifice and pressure downstream of the orifice, a passage changeover valve is set to a first position, when brake cylinder pressure is decreased during antiskid braking control, at which the passage changeover valve cuts off the discharge side of a pump from the brake cylinder, and to a second position, when brake cylinder pressure is increased, at which the changeover valve communicates the discharge side of the pump with a flow-rate controller and communicates the discharge side of the pump with a master cylinder and the brake cylinder solely through a first orifice in the flow-rate controller. As a result, when pressure is decreased during antiskid braking control, the discharge side and the intake side of the pump are completely cut off from each other so that the burden upon the pump is reduced.
REFERENCES:
patent: 4738493 (1988-04-01), Inagaki et al.
patent: 4915459 (1990-04-01), Hashida et al.
Graham Matthew C.
Jidosha Kiki Co. Ltd.
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