Patent ID: 9395013
Filing Date: 2016-07-19
CPC Classification: B60T,F15B,F16K,G05D,Y10T

Claim Text:
1. An electromagnetic two-way proportional flow control valve, comprising: a valve housing having a fluid inlet and an outflow opening; a control piston guided for axial displacement in said housing and actuating at least one fluid-conducting connection between said fluid inlet and said outflow opening; said control piston having a control surface facing said fluid inlet; an armature actuated by a proportional solenoid acting on said control piston; a pressure detecting piston being separable from and acting on an actuator part on said control piston and penetrating a guide plug in said valve housing, said guide plug forming a rigid and axially sliding bearing for said pressure detecting piston, said pressure detecting piston having a control surface; and a pressure detecting chamber in said valve housing connected in fluid communication with said fluid inlet via a pressure detecting duct conveying fluid pressure into said pressure detecting chamber to apply a force to said pressure detecting piston and said control piston relieving force on said armature, said pressure detecting piston penetrating said control piston to define a metering opening with a passage opening of said control piston in an area of a free front side of said pressure detecting piston, said control surface of said pressure detecting piston being in said pressure detecting chamber, a difference in areas of said control surfaces introducing a force on said control piston and said pressure detecting piston relieving said armature.