Control valve with integral pressure switch
AssigneeSchaeffler Technologies AG & Co. KG
InventorDavid Becker
Life of this patent
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Abstract
A control valve for hydraulic fluid is provided. The control valve includes a valve housing and a valve body slidably supported within the valve housing. The valve body has a hollow center defining a passage. The control valve includes a solenoid assembly having a solenoid housing, a coil, and an armature movable in an axial direction. The armature is in contact with an axial end of the valve body. The armature has a bore in fluid connection with the passage of the valve body. The solenoid housing includes a second passage in fluid connection with the bore. A diaphragm seals the second passage. A pressure sensor assembly is located adjacent to the diaphragm that detects a deflection of the diaphragm due to a pressure of the hydraulic fluid in the second passage.
Claims13
A control valve for hydraulic fluid, comprising:
- a valve housing defining an axial end port at a first axial end, a first peripheral port, and a second peripheral port, a first seat positioned in the valve housing between the axial end port and the second peripheral port, a second seat positioned in the valve housing between the first peripheral port and the second peripheral port,
- a valve body slidably supported within the valve housing including a first seal at a first axial end of the valve body for sealing against the first seat, and a second seal at a medial portion of the valve body for sealing against the second seat, the valve body having a hollow center defining a passage with a first opening located between the first axial end and the medial portion, and a second opening defined at a second axial end,
- a solenoid assembly including an armature movable in an axial direction with the armature in contact with the second axial end of the valve body, the armature having a fluid path in fluid connection with the passage of the valve body,
- a diaphragm connected to the fluid path, and
- a pressure sensor assembly located adjacent to the diaphragm on an opposite side from the fluid path that detects a deflection of the diaphragm due to a pressure of the hydraulic fluid in the fluid path.
A control valve for hydraulic fluid, comprising:
- a valve housing,
- a valve body slidably supported within the valve housing, the valve body having a hollow center defining a passage with a first opening located between a first axial end and a medial portion, and a second opening defined at a second axial end,
- a solenoid assembly including an armature movable in an axial direction with the armature in contact with the second axial end of the valve body, the armature having a fluid path in fluid connection with the passage of the valve body,
- a diaphragm connected to the fluid path, and
- a pressure sensor assembly located adjacent to the diaphragm on an opposite side from the fluid path that detects a deflection of the diaphragm due to a pressure of the hydraulic fluid in the fluid path.
Dependencies are inferred from the claim text.