Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1987-09-21
1989-02-28
Kashnikow, Andres
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
303 601, 303 71, 303119, B60T 842
Patent
active
048079464
ABSTRACT:
An anti-skid brake control system includes a fluid distributor member with first and second chambers, each of which is associated with a respective one-way valve for connecting it to the source and for preventing the propagation of fluid pressure from the source and for preventing the propagation of fluid pressure from the source to the respective chamber. A piston is sealingly slidable in each chamber and divides the chamber into a first volume, which communicates with the one-way valve associated with the respective chamber, and a second volume. The first volume of the first chamber communicates with the second volume of the second chamber. Each piston has an actuator for keeping the adjacent one-way valve in an open position when the piston is moved toward the one-way valve. An actuator selectively applies a force to the piston in the first chamber to move the piston. A valve member is provied for each group of brake members with a first intake duct connectible to the source of fluid operating pressure, a second intake duct communicating with the first volume of the first and second chambers, respectively, and at least one further duct communicating with the brake members of the group. The valve member including a first obturator interposed in the first intake duct and normally open, and a second obturator interposed in the second intake duct and normally closed. A brake control circuit, with a sensor which can detect the tendency of the wheels to lock causes the deactivation of the actuator means, with the stoppage of the force, the closure of the first obturator means of the respective valve member, and the opening of the second obturator means of the respective valve member.
REFERENCES:
patent: 3760912 (1973-09-01), Braun
patent: 3941427 (1976-03-01), Harries
patent: 4027924 (1977-06-01), Kondo
patent: 4066301 (1978-01-01), Harries
patent: 4095851 (1978-06-01), Ando et al.
patent: 4162108 (1979-07-01), Shimizu
patent: 4600245 (1986-07-01), Watanabe
Bertone Antonino
Ippolito Luigi P.
Fiat Auto S.p.A.
Kashnikow Andres
Le Mark T.
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