Method for manufacturing a solenoid valve

Patent metadata

Field	Value
Publication number	US-9429245-B2
Application number	US-201313850690-A
Country	US
Kind code	B2
Filing date	Mar 26, 2013
Priority date	Mar 26, 2012
Publication date	Aug 30, 2016
Grant date	Aug 30, 2016

Abstract

A method is described for manufacturing a solenoid valve, in particular a fuel injector, the solenoid valve having a valve needle which is movably guided in the axial direction, a magnet core and an armature which is situated axially diametrically opposed to the magnet core, the armature being situated on the valve needle, the armature having a first base material and a first reinforcing element and the magnet core having a second base material and a second reinforcing element. The method has one method step. The first reinforcing element is applied to the first base material and/or the second reinforcing element is applied to the second base material during the method step with the aid of molten bath spraying or with the aid of cold gas spraying.

First claim

What is claimed is:

1. A solenoid valve, comprising:
a valve needle which is movably guided in an axial direction;
a magnet core; and
an armature situated axially diametrically opposed to the magnet core, and the armature includes two surfaces perpendicular to the axial direction: 1) a first surface facing the magnet core, and 2) a second surface facing away from the magnetic core;
wherein:
the armature situated is on the valve needle and includes a first base material and a first reinforcing element;
the magnet core includes a second base material and a second reinforcing element;
at least one of: i) the first reinforcing element is applied to the first base material with the aid of one of molten bath spraying or cold gas spraying, and ii) the second reinforcing element is applied to the second base material with the aid of one of molten bath spraying or cold spraying; and
the first reinforcing element is situated on both the first and second surfaces of the armature.

2. The solenoid valve as recited in claim 1 , wherein the solenoid valve is a fuel injector.

3. The solenoid valve as recited in claim 1 , wherein a material of at least one of the first reinforcing element and the second reinforcing element has a melting point higher than 500° C.

4. The solenoid valve as recited in claim 1 , wherein a material of at least one of the first reinforcing element and the second reinforcing element has a melting point higher than 1000° C.

5. The solenoid valve as recited in claim 1 , wherein a material of at least one of the first reinforcing element and the second reinforcing element has a melting point higher than 1300° C.

6. The solenoid valve as recited in claim 1 , wherein a material of at least one of the first reinforcing element and the second reinforcing element is a chromium material or a nickel-chromium alloy.

7. The solenoid valve as recited in claim 1 , wherein a material of at least one of the first reinforcing element and the second reinforcing element is one of an INCONEL alloy or a stainless steel alloy.

8. The solenoid valve as recited in claim 1 , further comprising a stop collar that contacts the first reinforcement element situated on the second surface of the armature, wherein the first reinforcing element situated on the second surface of the armature only extends in a radial direction sufficient to contact the stop collar.

9. The solenoid valve as recited in claim 1 , wherein the first reinforcing element is situated in a surface area of the armature facing the magnet core, which is situated perpendicularly to the axial direction of the valve needle.

10. The solenoid valve as recited in claim 1 , wherein the second reinforcing element is situated in a surface area of the magnet core facing the armature, which is situated perpendicularly to the axial direction of the valve needle.

11. The solenoid valve as recited in claim 1 , wherein the second reinforcing element is situated in a cylindrical surface area of the magnet core, which is situated parallel to the axial direction of the valve needle.

12. The solenoid valve as recited in claim 1 , wherein at least one of the first reinforcing element and the second reinforcing element has a material thickness of 50 μm to 100 μm.

13. The solenoid valve as recited in claim 1 , wherein at least one of the first reinforcing element and the second reinforcing element has a material thickness of 20 μm to 200 μm.

Assignees

• Graner Juergen
• Maier Martin
• Berg Anselm
• Bosch Gmbh Robert

Inventors

• Graner Juergen
• Maier Martin
• Berg Anselm

Classifications

• F16K31/04 Primary

  using a motor · CPC title

• F02M2200/02

  Fuel-injection apparatus having means for reducing wear · CPC title

• F02M2200/9038

  Coatings · CPC title

• F02M51/0653 Primary

  the valve being an elongated body, e.g. a needle valve · CPC title

• F02M63/0017

  using electromagnetic operating means · CPC title