Method for manufacturing a spark plug electrode system and a spark plug, spark plug electrode system, and spark plug

Patent metadata

Field	Value
Publication number	US-2021273417-A1
Application number	US-201917260481-A
Country	US
Kind code	A1
Filing date	May 23, 2019
Priority date	Aug 2, 2018
Publication date	Sep 2, 2021
Grant date	—

Abstract

A method for manufacturing a spark plug electrode system including a ground electrode and a center electrode, which are connected to each other by a joining area, formed from a one-piece spark plug electrode base body made up of spark plug electrode material.

First claim

1 - 22 . (canceled)

23 . A method for manufacturing a spark plug electrode system including a ground electrode and a center electrode, which are connected to each other by a joining area, the method comprising:
forming the ground electrode, the center electrode, and the joining area together from a one-piece spark plug electrode base body made up of spark plug electrode material.

24 . The method as recited in claim 23 , wherein the formation of the ground electrode, the center electrode, and the joining area includes removing spark plug electrode material from the spark plug electrode base body.

25 . The method as recited in claim 24 , further comprising:
forming an ignition spark gap between the ground electrode and the center electrode by removing spark plug electrode material from the spark plug electrode base body, the ground electrode and the center electrode remaining connected to each other by the joining area made up of the spark plug electrode material.

26 . The method as recited in claim 24 , wherein the removal of the spark plug electrode material from the spark plug electrode base body is carried out via punching or material removal or eroding or lasering.

27 . The method as recited in claim 23 , further comprising:
deep drawing at least one area of the spark plug electrode base body.

28 . The method as recited in claim 23 , further comprising:
building up spark plug electrode material in such a way that the ground electrode, the center electrode, and the joining area connecting the ground electrode and the center electrode, are formed as one piece.

29 . The method as recited in claim 28 , wherein the build-up of spark plug electrode material takes place in such a way that an ignition spark gap is formed between the ground electrode and the center electrode, the ground electrode and the center electrode remaining connected to each other by the joining area made up of the spark plug electrode material.

30 . The method as recited in claim 28 , wherein the build-up of the spark plug electrode material is carried out by 3D printing.

31 . The method as recited in claim 23 , wherein the ground electrode encompasses the center electrode at least in sections.

32 . The method as recited in claim 23 , wherein the joining area is in the form of at least one web, which connects the ground electrode and the center electrode to each other.

33 . The method as recited in claim 32 , wherein the joining area includes two to four webs, which connect the ground electrode and the center electrode to each other.

34 . The method as recited in claim 23 , further comprising:
situating at least one first noble metal at the ground electrode and/or at least one second noble metal at the center electrode, the first noble metal ( 12 ) and/or the second noble metal being situated in such a way that they are situated in an area forming a spark gap between the ground electrode and the center electrode.

35 . The method as recited in claim 23 , further comprising:
providing openings in the ground electrode and/or in the center electrode.

36 . A method for manufacturing a spark plug including a spark plug electrode system including a ground electrode and a center electrode, which are connected to each other by a joining area, formed from a one-piece spark plug electrode base body made up of spark plug electrode material, the method comprising:
connecting the spark plug electrode system to a spark plug base body.

37 . The method as recited in claim 36 , wherein the ground electrode is connected to a housing of the spark plug and/or the center electrode is connected to an electrical terminal for the center electrode.

38 . The method as recited in claim 36 , wherein the connection is carried out using laser welding, or using resistance welding, or using brazing.

39 . The method as recited in 36 , further comprising:
removing the joining area between the ground electrode and the center electrode.

40 . The method as recited claim 36 , further comprising:
providing openings in the ground electrode and/or in the center electrode.

41 . A spark plug electrode system, comprising:
a ground electrode and a center electrode connected to each other by a joining area, the spark plug electrode system being formed as one piece from a spark plug electrode material.

42 . The spark plug electrode system as recited in claim 41 , wherein the center electrode is cylindrically designed and/or the ground electrode is designed in the form of a cylindrical ring and/or the joining area is formed from at least one web.

43 . A spark plug, comprising:
a spark plug electrode system including a ground electrode and a center electrode, which are connected to each other by a joining area, formed from a one-piece spark plug electrode base body made up of spark plug electrode material; and a spark plug base body to which the spark plug electrode system is connected.

44 . A spark plug, comprising:
a ground electrode and a center electrode, which, between each other, define a spark gap, the ground electrode encompassing the center electrode; wherein: (i) a first noble metal is situated at the ground electrode, in an area forming the spark gap between the ground electrode and the center electrode, and the first noble metal includes at least one section, which is free of the first noble metal, and/or (ii) a second noble metal is situated at the center electrode, in the area forming the spark gap between the ground electrode and the center electrode, and the second noble metal includes at least one section, which is free of the second noble metal.

Assignees

• Bosch Gmbh Robert

Inventors

• Ritter Ronald
• Orlandini Igor

Classifications

• H01T21/02 Primary

  of sparking plugs · CPC title

• H01T13/467

  in parallel connection · CPC title

• H01T13/22 Primary

  having two or more electrodes embedded in insulation (sparking plugs having two or more spark gaps H01T13/46) · CPC title

• H01T13/20

  characterised by features of the electrodes or insulation · CPC title

• H01T13/32

  characterised by features of the earthed electrode · CPC title