Valve unit for braking pressure control in wheeled vehicles

Details Valve unit for braking pressure control in wheeled vehicles Valve unit for braking pressure control in wheeled vehicles

1975-04-17

1976-08-31

Kunin, Stephen G.

Fluid-pressure and analogous brake systems

Inertia control

1376275, 303 40, 303 61, 303 68, B60T 806, B60T 1502

Patent

active

039777340

ABSTRACT:
A valve unit for controlling air flow and braking pressure in the brake cylinder of a pneumatic braking system. The valve unit has an inlet and an outlet valve assembly each of which are controlled by a solenoid valve, which is in turn controlled by an electronic braking control system. In the inlet valve assembly there is a valve diaphragm which on one side is biased by one pressure to close the valve unit, and which on the opposite side is biased by two pressures to open the valve unit. The ratio between the areas affected by the respective pressures is selected in such a way that the brake cylinder pressure is raised in essentially constant steps.

REFERENCES:
patent: 3549212 (1970-12-01), Leiber
patent: 3743362 (1973-07-01), Neisch
patent: 3768519 (1973-10-01), Morse
patent: 3768875 (1973-10-01), Davis et al.
patent: 3823987 (1974-07-01), Kurichh
patent: 3844623 (1974-10-01), Parsons et al.
patent: 3866982 (1975-02-01), Geier et al.
patent: 3881779 (1975-05-01), Machek

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