SOLENOID VALVE ASSEMBLY WITH PILOT PRESSURE CONTROL

摘要

A valve assembly includes a valve body with an interior cavity and a primary supply port, a secondary supply port, a control port, and an exhaust port each extending to the interior cavity. An armature assembly is configured to move within the interior cavity from a first position to a second position when the coil is energized. A regulator body is operatively connected to the valve body and has an exhaust passage positioned at the exhaust port. A regulator valve in the regulator body is configured to prevent flow out of the exhaust passage when fluid pressure on the regulator valve is at or below a pilot pressure and permit flow out of the exhaust passage when fluid pressure on the regulator valve is greater than the pilot pressure. The valve body is configured to provide fluid from the secondary supply port to the control port.

主权项

1. A valve assembly comprising:
a selectively energizable coil; a valve body that defines an interior cavity and has a primary supply port, a secondary supply port, a control port, and an exhaust port each extending to the interior cavity; an armature assembly configured to move within the interior cavity from a first position to a second position when the coil is energized; a regulator body operatively connected to the valve body and having an exhaust passage positioned at the exhaust port; a regulator valve positioned in the regulator body and configured to prevent fluid flow out of the exhaust passage when fluid pressure on the regulator valve is not greater than a predetermined pilot pressure, and configured to permit fluid flow out of the exhaust passage when fluid pressure on the regulator valve is greater than the predetermined pilot pressure; and wherein the valve body and armature assembly are configured to permit fluid flow from the secondary supply port to the control port at the predetermined pilot pressure and block fluid flow from the primary supply port to the control port when the armature is in one of the first position and the second position; and wherein the valve body and the armature assembly are configured to permit fluid flow from the primary supply port to the control port at a supply pressure greater than the predetermined pilot pressure when the armature is in the other of the first position and the second position.