US 12,278,465 B2
Prechamber spark plug having accurately adjustable electrode gap, and associated method
Axel Bormann, Bamberg (DE); Manfred Roeckelein, Kemmern (DE); Stephan Kaske, Sternenfels Diefenbach (DE); and Thomas Steidten, Ludwigsburg (DE)
Assigned to ROBERT BOSCH GMBH, Stuttgart (DE)
Appl. No. 18/550,619
Filed by Robert Bosch GmbH, Stuttgart (DE)
PCT Filed Mar. 28, 2022, PCT No. PCT/EP2022/058074
§ 371(c)(1), (2) Date Sep. 14, 2023,
PCT Pub. No. WO2022/228798, PCT Pub. Date Nov. 3, 2022.
Claims priority of application No. 10 2021 204 189.2 (DE), filed on Apr. 27, 2021.
Prior Publication US 2024/0170928 A1, May 23, 2024
Int. Cl. H01T 13/34 (2006.01); H01T 13/54 (2006.01); H01T 21/02 (2006.01)
CPC H01T 13/34 (2013.01) [H01T 13/54 (2013.01); H01T 21/02 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A prechamber spark plug, comprising:
a central electrode and a ground electrode arranged in a pre-chamber; and
a housing having a lateral hole;
wherein the ground electrode is arranged in the lateral hole in such a way that there is a gap area and a fastening area between the ground electrode and the housing, wherein the electrode spacing is determined by measuring a second spacing of a rear face of the ground electrode from an outer side of the housing such that the second spacing and the electrode spacing are equal.