초록 ▼

A proportional variable force solenoid control valve with an armature reciprocably movable within the bore hole of a coreless solenoid bobbin in proportion to applied electrical current between positions corresponding to a closed valve position and a fully open position. The positioning of the armat

A proportional variable force solenoid control valve with an armature reciprocably movable within the bore hole of a coreless solenoid bobbin in proportion to applied electrical current between positions corresponding to a closed valve position and a fully open position. The positioning of the armature is controlled by balancing the variable force of the magnetic field of the coreless solenoid plus the force of the magnetic field of a permanent ring magnet against the force of a coil spring which biases the valve toward the closed position. The armature is suspended by low spring rate plate springs on opposite ends of the armature. An elastomeric diaphragm seals the solenoid against contaminants. The force of the coil spring is adjusted by a threaded plug.

대표청구항 ▼

A proportional variable force solenoid valve for controlling the pressure of pressurized fluid in a fluid control system in proportion to the current level of an electrical input signal comprising: a valve member including a movable valve adapted for controlling the pressure of pressurized fluid in

A proportional variable force solenoid valve for controlling the pressure of pressurized fluid in a fluid control system in proportion to the current level of an electrical input signal comprising: a valve member including a movable valve adapted for controlling the pressure of pressurized fluid in said fluid control system; a solenoid connected to said valve member, said solenoid including an armature having one end connected to said movable valve t o move said armature between first and second axial positions in accordance with the current level of said electrical input signal, an electromagnetic coil connected to said electrical input signal for generating an electromagnetic field and including a longitudinal bore hole extending therethrough, means for suspending said armature within said bore hole at each end of said armature for axial movement between said first and second axial positions, means for resiliently biasing said armature toward said first position, a permanent ring magnet magnetically coupled between one of said suspending means and said coil and adjacent one end of said armature, said permanent ring magnet producing a magnetic force in said second axial direction and substantially saturating said armature whereby said armature is axially moved between said first and second axial positions in proportion to the current level of said electrical input signal.