Proportional control valve with differential sensing area

Fluid-pressure and analogous brake systems – Multiple systems – Fluid pressure and electric

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303 15, 303 40, B60T 1374

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active

053183541

ABSTRACT:
An electrically actuated valve for regulating a working pressure of a closed volume load includes an inlet valve (24) for controlling fluid flow between a supply port (16) and a working port (18) and an outlet valve (26) for controlling fluid flow between the working port (18) and an exhaust port (20). A solenoid actuator (70) applies an adjustable force to a movable valve element (44) for closing the outlet valve (26) and opening the inlet valve (24). The adjustable force is opposed by a reactionary force that is generated by the working pressure. The movable element (44) includes opposing areas exposed to the working pressure for scaling the reactionary force to the working pressure.

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Advertisement Brochure entitled "MPP/MPZ Electro-Pneumatic Proportional Pressure Regulator Valve," published by Festo Corporation, 1988.

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