Method for producing a corona ignition device

Patent metadata

Field	Value
Publication number	US-9425586-B2
Application number	US-201414255560-A
Country	US
Kind code	B2
Filing date	Apr 17, 2014
Priority date	Apr 22, 2013
Publication date	Aug 23, 2016
Grant date	Aug 23, 2016

Abstract

The invention relates to a method for producing a corona ignition device, in which a center electrode is plugged into an insulator and is connected to a coil, the coil is arranged in a housing tube, a mount for the insulator is fastened to a front end of the housing tube, and a plug connector is fastened to a rear end of the housing tube, and the housing tube is filled with insulating gas. In accordance with this disclosure, the insulating gas is introduced into the housing tube through a bore which is later sealed by welding. In one embodiment, a peg is plugged into the bore to facilitate sealing. In another embodiment, the bore is drilled into the plug connector.

First claim

What is claimed is:

1. A method for producing a corona ignition device, comprising:
plugging a center electrode into an insulator and connecting the center electrode to a coil;
arranging the coil in a housing tube;
fastening a mount of the insulator to a front end of the housing tube and fastening a plug connector to a rear end of the housing tube;
introducing insulating gas in the housing through a bore into which a peg is inserted and filling the housing tube with the insulating gas; and
welding the peg to a rim of the bore and thereby sealing the bore;
wherein the housing tube is introduced into a pressure chamber and the housing tube is then filled with the insulating gas; and
wherein the pressure chamber has a window through which a laser beam is guided into the pressure chamber to weld shut the bore.

2. The method according to claim 1 , wherein the peg is inserted into the bore before the insulating gas is introduced into the housing tube and the insulating gas is introduced into the housing tube through a gap between the peg and a wall of the bore.

3. The method according to claim 1 , wherein the bore is formed in the plug connector.

4. The method according to claim 3 , wherein peg is formed of a different material then the plug connector.

5. The method according to claim 1 , wherein the peg has a head.

6. The method according to claim 1 , wherein the peg comprises a nickel based alloy.

7. The method according to claim 1 , wherein an end of the peg that is a forward end in the direction of insertion is arranged inside the bore.

8. The method according to claim 1 , wherein the peg comprises a section that has a non-circular cross-section, and the peg is pressed into the bore so that the non-circular section is frictionally held in the bore until the bore is sealed by welding.

9. The method according to claim 1 , further comprising suctioning air from the housing tube before the step of filling the housing tube with the insulating gas.

10. The method according to claim 9 , wherein the pressure chamber is connected via a valve to a vacuum chamber that has a larger volume than the pressure chamber, the method further comprising opening the valve to suction air from the housing tube.

11. The method according to claim 1 , wherein the insulating gas contains helium or another tracer gas.

Assignees

• Borgwarner Beru Systems Gmbh
• Borgwarner Ludwigsburg Gmbh

Inventors

• Achtstätter Tom
• Stifel Timo
• Hasenkamp Johannes

Classifications

• Y10T29/49002

  Electrical device making · CPC title

• H01T21/02 Primary

  of sparking plugs · CPC title

• H01T13/50

  having means for ionisation of gap (H01T13/52 takes precedence) · CPC title

• Y10T29/417

  Cross-Sectional Technologies · mapped topic