Solenoid valve with improved opening and closing behavior

Patent metadata

Field	Value
Publication number	US-9903328-B2
Application number	US-201414762346-A
Country	US
Kind code	B2
Filing date	Feb 18, 2014
Priority date	Apr 17, 2013
Publication date	Feb 27, 2018
Grant date	Feb 27, 2018

Abstract

A solenoid valve for controlling fluids includes a closing element that opens and closes at least one outlet opening on a valve seat, and a magnetic circuit that includes an armature, an internal pole, a magnetic return path, and a coil, the armature being connected to the closing element. The magnetic circuit includes a nonmagnetic separating element for interrupting the magnetic circuit and at least one magnetic crosspiece running in a direction of a longitudinal extension of the valve and situated on the nonmagnetic separating element.

First claim

What is claimed is:

1. A solenoid valve for controlling fluids, including:
a closing element configured for opening and closing at least one outlet opening at a valve seat;
a magnetic circuit including an internal pole, a magnetic return path, and an armature that cooperates with the closing element for effecting a lifting motion of the closing element;
a coil;
a nonmagnetic separating element for interrupting the magnetic circuit;
at least one magnetic crosspiece running in a direction of a longitudinal extension of the valve and situated on the nonmagnetic separating element; and
a housing part made of a material different than that of the at least one magnetic crosspiece, wherein:
the at least one magnetic crosspiece produces a connection between the housing part and the internal pole,
a first section of the magnetic crosspiece is in direct contact with the internal pole,
a second section of the magnetic crosspiece is in direct contact with the armature, and
a side of the magnetic crosspiece that faces and is parallel to a longitudinal axis of the solenoid valve includes the first section and the second section.

2. The solenoid valve of claim 1 , wherein the at least one magnetic crosspiece is situated radially inside the nonmagnetic separating element.

3. The solenoid valve of claim 1 , wherein the at least one magnetic crosspiece is formed in one piece with the nonmagnetic separating element.

4. The solenoid valve of claim 1 , wherein the at least one magnetic crosspiece is in contact with the armature and forms a guidance for the armature.

5. The solenoid valve of claim 1 , wherein the at least one magnetic crosspiece is in contact with the internal pole.

6. The solenoid valve of claim 1 , wherein the at least one magnetic crosspiece includes a plurality of magnetic crosspieces, and the plurality of magnetic crosspieces and the nonmagnetic separating element are shaped as a cylindrical sleeve with a constant inner diameter.

7. The solenoid valve of claim 1 , wherein there is a force-locking connection between the magnetic crosspiece and the internal pole.

8. The solenoid valve of claim 7 , wherein the force-locking connection is a clamping connection.

9. A solenoid valve for controlling fluids, including:
a closing element configured for opening and closing at least one outlet opening at a valve seat;
a magnetic circuit including an internal pole, a magnetic return path, and an armature that cooperates with the closing element for effecting a lifting motion of the closing element;
a coil;
a nonmagnetic separating element for interrupting the magnetic circuit;
at least one magnetic crosspiece running in a direction of a longitudinal extension of the valve and situated on the nonmagnetic separating element; and
a housing part made of a material different than that of the at least one magnetic crosspiece, wherein the at least one magnetic crosspiece produces a connection between the housing part and the internal pole, wherein the at least one magnetic crosspiece is formed in one piece with the nonmagnetic separating element, wherein the at least one magnetic crosspiece, the nonmagnetic separating element, and the housing part, which is a part of the magnetic circuit, are provided as a one-piece component.

10. The solenoid valve of claim 9 , wherein the one-piece component is a Metal Injection Molding (MIM) component.

11. A solenoid valve for controlling fluids, including:
a closing element configured for opening and closing at least one outlet opening at a valve seat;
a magnetic circuit including an internal pole, a magnetic return path, and an armature that cooperates with the closing element for effecting a lifting motion of the closing element;
a coil;
a nonmagnetic separating element for interrupting the magnetic circuit; and
at least one magnetic crosspiece running in a direction of a longitudinal extension of the valve and situated on the nonmagnetic separating element, wherein the at least one magnetic crosspiece is formed in one piece with the nonmagnetic separating element, wherein the at least one magnetic crosspiece, the nonmagnetic separating element, a housing part, which is a part of the magnetic circuit, are provided as a one-piece component, and wherein the housing part is magnetically stronger than the at least one magnetic crosspiece.

12. A solenoid valve for controlling fluids, including:
a closing element configured for opening and closing at least one outlet opening at a valve seat;
a magnetic circuit including an internal pole, a magnetic return path, and an armature that cooperates with the closing element for effecting a lifting motion of the closing element;
a coil;
a nonmagnetic separating element for interrupting the magnetic circuit; and
at least one magnetic crosspiece running in a direction of a longitudinal extension of the valve and situated on the nonmagnetic separating element, wherein the at least one magnetic crosspiece is formed in one piece with the nonmagnetic separating element, wherein the at least one magnetic crosspiece, the nonmagnetic separating element, a housing part, which is a part of the magnetic circuit, are provided as a one-piece component, and wherein the housing part is made of ferrite, the nonmagnetic separating element is made of austenite, and the at least one magnetic crosspiece is made of martensite.

13. The solenoid valve of claim 12 , wherein the housing part is magnetically stronger than the at least one magnetic crosspiece.

14. A solenoid valve for controlling fluids, including:
a closing element configured for opening and closing at least one outlet opening at a valve seat;
a magnetic circuit including an internal pole, a magnetic return path, and an armature that cooperates with the closing element for effecting a lifting motion of the closing element;
a coil;
a nonmagnetic separating element for interrupting the magnetic circuit;
at least one magnetic crosspiece running in a direction of a longitudinal extension of the valve and situated on the nonmagnetic separating element; and
a housing part made of a material different than that of the at least one magnetic crosspiece, wherein the at least one magnetic crosspiece produces a connection between the housing part and the internal pole, wherein the at least one magnetic crosspiece is in contact with the armature and forms a guidance for the armature, wherein the at least one magnetic crosspiece, the nonmagnetic separating element, and the housing part, which is a part of the magnetic circuit, are provided as a one-piece component.

15. The solenoid valve of claim 14 , wherein the one-piece component is a Metal Injection Molding (MIM) component.

16. A solenoid valve for controlling fluids, including:
a closing element configured for opening and closing at least one outlet opening at a valve seat;
a magnetic circuit including an internal pole, a magnetic return path, and an armature that cooperates with the closing element for effecting a lifting motion of the closing element;
a coil;
a nonmagnetic separating element for interrupting the magnetic circuit; and
at least one magnetic crosspiece running in a direction of a longitudinal extension of the valve and situated on the nonmagnetic separating element, wherein the at least one magnetic crosspiece is in contact with the armature and forms a guidance for the armature, wherein the at least one magnetic crosspiece, the nonmagnetic separating element, and a housing part, which is a part of the magnetic circuit, are provided as a one-piece component, and wherein the housing part is magnetica

Assignees

• Bosch Gmbh Robert

Inventors

• Kromer Ralf
• Knorpp Michael

Classifications

• F16K31/0675

  Electromagnet aspects, e.g. electric supply therefor · CPC title

• F02M2200/08

  Fuel-injection apparatus having special means for influencing magnetic flux, e.g. for shielding or guiding magnetic flux · CPC title

• F02M2200/9069

  Non-magnetic metals · CPC title

• F16K27/029

  Electromagnetically actuated valves · CPC title

• F16K31/0655

  Lift valves · CPC title