Fluid-pressure and analogous brake systems – Multiple fluid-receiving devices – Multiple motors
Patent
1977-08-16
1978-10-10
Reger, Duane A.
Fluid-pressure and analogous brake systems
Multiple fluid-receiving devices
Multiple motors
303 84A, B60T 826
Patent
active
041193520
ABSTRACT:
An hydraulic braking pressure control unit for a vehicle includes a first valve member installed at an intermediate point in a flow passage providing communication between the rear brake system of a tandem master cylinder and rear wheel cylinders, the valve member is adapted to open and close the passage, and a proportioning valve is normally urged in one direction to keep the valve member away from its seat to establish communication between the tandem master cylinder and the rear wheel cylinders. The proportioning valve is adapted, when the braking pressure is supplied from the tandem master cylinder, to reduce the braking pressure at a predetermined rate and supply the reduced braking pressure to the rear wheel cylinders. A passage is provided for communication between passages formed upstream and downstream of the proportioning valve, and a second valve member is arranged to open and close the communicating passage. The second valve member has a passage formed on its side facing the opening direction for the flow of the braking pressure for the rear brake system of the tandem master cylinder and also has a passage formed on its side facing the closing direction for the flow of the braking pressure for the front brake system of the tandem master cylinder. The second valve member is in the closed position when it is subjected to the braking pressures of both the rear and front brake systems.
REFERENCES:
patent: 3180693 (1965-04-01), Stelzer
patent: 3838887 (1974-10-01), Stelzer
Jidosha Kiki Co. Ltd.
Reger Duane A.
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