Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1985-09-30
1987-04-28
Reger, Duane A.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
303113, B60T 802
Patent
active
046608990
ABSTRACT:
A hydraulic anti-skid apparatus for automotive vehicles includes a cut-off valve disposed within a braking circuit connecting a master cylinder to a wheel brake cylinder, a bypass valve disposed within a bypass passage of the braking circuit, first and second pistons respectively arranged to control opening and closing operations of the cut-off valve and the bypass valve, the first and second pistons each being arranged to be applied at one end thereof with a hydraulic braking pressure from the master cylinder and at the other end thereof with a hydraulic power pressure from a fluid pump, a solenoid valve arranged to apply the power pressure to the first piston in its deactivated condition and to connect the first piston to a fluid reservoir in its activated condition, a regulator valve arranged to control the power pressure applied to the first and second pistons in accordance with the braking pressure applied thereto, the regulator valve including a booster piston assembly having a small diameter portion applied with the power pressure and a large diameter portion applied with the braking pressure. The regulator valve acts to cooperate with a check valve in response to movement of the booster piston assembly thereby to produce a hydraulic pressure at a higher value than the braking pressure.
REFERENCES:
patent: 4036534 (1977-07-01), Kondo et al.
patent: 4316642 (1982-02-01), Belart
Ando Masamoto
Takeuchi Hiroaki
Yamada Toyohisa
Yamanaka Toshihiko
Aisin Seiki Kabushiki Kaisha
Graham Matthew C.
Reger Duane A.
Toyota Jidosha & Kabushiki Kaisha
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