Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1977-08-18
1979-01-02
Reger, Duane A.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
303 92, 303115, B60T 806
Patent
active
041324510
ABSTRACT:
A check valve is integrally formed on one end of an expansion valve slidably disposed in a first stepped bore and arranged to cut communication between the master cylinder and the brake units upon the pressure of the hydraulic fluid biasing the expansion valve to a first normal position being reduced due to either a signal from a computing circuit indicating a dangerously high rate of deceleration or cessation of the supply of pressurized hydraulic fluid. The movement of the expansion valve from its normal position permits the fluid in the brake units to pressure reducingly expand. A differential valve integrally connected to a by-pass valve maintains a fail safe pressure transmission path closed until cessation of the supply of pressurized fluid whereupon the master cylinder is directly connected with the brake units and a regulator valve slidably disposed in a third stepped bore formed in the by-pass valve is responsive to the change of both the master cylinder pressure and the supplied pressurized fluid to modulate the pressure biasing the expansion valve to its normal position.
REFERENCES:
patent: 3922021 (1975-11-01), Every
patent: 4033638 (1977-07-01), Bertone et al.
Nissan Motor Company Limited
Reger Duane A.
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