Solenoid-operated pressure control valve

Details Solenoid-operated pressure control valve Solenoid-operated pressure control valve

1988-05-25

1989-06-13

Michalsky, Gerald A.

Fluid handling

Systems

Multi-way valve unit

91433, F15B 13044

Patent

active

048383139

ABSTRACT:
In a solenoid-operated pressure control valve having a pressure modulating section and a magnetic section, the pressure modulating section includes a valve sleeve having an application port, an output port, a feedback port having throttle passage, and a drain port, and a spool being movable in the valve sleeve; and the magnetic section includes a coil assembly and a rod. According to the above structure a force developed from the magnetic section, a force developed by a spring and an output pressure feedback force are applied and balanced, so that an application pressure is so modulated that the application pressure is taken out as an output pressure corresponding to input electric level to the magnetic section. Furthermore, the spool is made to have at least two lands neighboring on each other and to have different diameters, a feedback port which is directly connected to the area between the different diameters is made on the valve sleeve, and the output pressure is so feedbacked that its volume corresponds to the difference of diameters by applying the pressure from the output port.

REFERENCES:
patent: 3880476 (1975-04-01), Belart et al.
patent: 4316599 (1982-02-01), Bouvet et al.
patent: 4535816 (1985-08-01), Feder et al.
patent: 4605197 (1986-08-01), Casey et al.

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