Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1987-02-17
1988-03-15
Butler, Douglas C.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
303114, 303119, B60T 836, B60T 888, B60T 1316
Patent
active
047308796
ABSTRACT:
An anti-skid apparatus in a vehicle braking system including a bypass circuit connected in parallel with a braking circuit between a master cylinder and a wheel brake cylinder, wherein a fluid pump is disposed within the bypass circuit and connected to a fluid reservoir to produce a hydraulic power pressure, a first switchover valve is disposed within both the circuits to permit the flow of fluid passing through the braking circuit in its deactivated condition and to interrupt the braking circuit and connect the brake cylinder to the reservoir through the bypass circuit in its activated condition, a second switchover valve is disposed between the master cylinder and the first switchover valve to permit the flow of fluid passing through the braking circuit while the first switchover valve is maintained in its deactivated conidition and to interrupt the braking circuit and connect the pump to the brake cylinder in response to a decrease of the brake cylinder pressure caused by activation of the first switchover valve, a regulator valve is disposed within the bypass circuit between the pump and the second switchover valve to control the power pressure in dependence upon the master cylinder pressure, and a relief valve is disposed within the bypass circuit to maintain the power pressure at a predetermined value.
REFERENCES:
patent: 4618189 (1986-10-01), Nakanishi et al.
patent: 4636008 (1987-01-01), Adachi et al.
patent: 4636010 (1987-01-01), Adachi et al.
patent: 4652061 (1987-03-01), Nishimura et al.
patent: 4655509 (1987-04-01), Ando et al.
Adachi Yoshiharu
Ando Masamoto
Nakanishi Nobuyasu
Noguchi Noboru
Takeuchi Hiroaki
Aisin Seiki Kabushiki Kaisha
Butler Douglas C.
Toyota Jidosha & Kabushiki Kaisha
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