Two-stage solenoid valve

Patent metadata

Field	Value
Publication number	US-10197186-B2
Application number	US-201415024148-A
Country	US
Kind code	B2
Filing date	Sep 15, 2014
Priority date	Sep 23, 2013
Publication date	Feb 5, 2019
Grant date	Feb 5, 2019

Abstract

A valve for controlling fluids, in particular hydraulic fluid, includes a first connector opening and a second connector opening, a preliminary stage with a first valve seat and a first displaceable closing body, and a main stage with a second valve seat and a second displaceable closing body. The first valve seat is assigned to a through opening of the second closing body. A filtering gap is formed in a flow path from the first connector opening to the preliminary stage by way of a constriction of the flow path.

First claim

The invention claimed is:

1. A valve for controlling fluids, comprising:
a first port and a second port;
a preliminary stage with a first valve seat and a first displaceable closing body;
a main stage with a second valve seat and a second displaceable closing body; and
an actuating element arranged axially displaceably in a valve sleeve and configured to selectively engage with the first closing body, wherein:
the second closing body is arranged axially displaceably in the valve sleeve,
the second closing body has a passage opening and the first valve seat is assigned to the passage opening,
a filtration gap is formed in a flow path from the first port to the preliminary stage by a constriction of the flow path,
the actuating element has at least one groove formed in a radially outwardly facing surface of the actuating element, and
the at least one groove forms a portion of the flow path and is upstream of the filtration gap.

2. The valve as claimed in claim 1 , wherein:
the first valve seat lies inside the valve sleeve, and
the flow path leads through at least one radial opening formed in the valve sleeve.

3. The valve as claimed in claim 1 , wherein:
the at least one groove is an axial groove, and
the flow path leads through at least one radial opening formed axially at the level of the actuating element.

4. The valve as claimed in claim 1 , wherein:
the filtration gap is formed radially between the actuating element and the valve sleeve.

5. The valve as claimed in claim 1 , wherein the filtration gap lies adjacent to an axial air gap between the actuating element and the second closing body.

6. The valve as claimed in claim 4 , wherein the filtration gap lies adjacent to an axial air gap between the actuating element and the second closing body.

7. The valve as claimed in claim 1 , wherein the at least one groove is an annular groove.

Assignees

• Bosch Gmbh Robert

Inventors

• Dinerman Michael
• Jeschke Julia
• Edelmann Volker
• Foerch Dirk

Classifications

• B60T8/363

  in hydraulic systems (B60T8/3655, B60T8/3675 and B60T8/369 take precedence) · CPC title

• F16K39/024 Primary

  using an auxiliary valve on the main valve · CPC title

• F16K31/408

  the discharge being effected through the piston and being blockable by an electrically-actuated member making contact with the piston · CPC title

• Y10T137/87507

  Electrical actuator · CPC title

• F16K31/0655

  Lift valves · CPC title