Solenoid operated pressure control valve

Details Solenoid operated pressure control valve Solenoid operated pressure control valve

1988-07-29

1990-04-17

Michalsky, Gerald A.

Fluid handling

Systems

Multi-way valve unit

13762568, 25112921, F15B 13044

Patent

active

049171500

ABSTRACT:
A solenoid actuated valve for regulating the fluid pressure at a control port by cyclically connecting the control port alternately to a fluid pressure supply source and to a sump includes a sleeve-like valve member slidably mounted on a fixed valve member for movement between two positions in response to energization or deenergization of the solenoid coil. The valve sleeve is the armature of the solenoid and operates within an internal chamber in the valve housing with pressure within the chamber balanced against its opposite ends. Energization and deenergization of the solenoid coil may be controlled by a processor which supplies a pulse width modulated electric control signal variable in response to processor inputs to establish a control port pressure which is accurately linearly related to the time duration of the pulse width modulated signal.

REFERENCES:
patent: 3285285 (1966-11-01), Bielefeld
patent: 4513780 (1985-04-01), Evans
patent: 4579145 (1986-04-01), Leiber et al.
patent: 4655249 (1987-04-01), Livet

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