Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1977-08-12
1979-09-18
Reger, Duane A.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
188181A, B60T 802
Patent
active
041681002
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 by-pass valve slidably disposed in a second stepped bore responds to increased master cylinder pressure to increase the pressure biasing the expansion valve to the first normal position to balance the reverse effect of the increased master cylinder pressure. A differential valve integrally connected to the 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.
REFERENCES:
patent: 3936095 (1976-02-01), Every
patent: 3981543 (1976-09-01), Atkins
Nissan Motor Company Limited
Reger Duane A.
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