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US 12,278,465 B2Granted
Prechamber spark plug having accurately adjustable electrode gap, and associated method
AssigneeRobert Bosch GmbH
InventorsAxel Bormann, Manfred Roeckelein, Stephan Kaske, Thomas Steidten
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Abstract
A prechamber spark plug. The prechamber spark plug includes a central electrode and a ground electrode which are arranged in a prechamber, and a housing having a lateral hole, the ground electrode being 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.
Claims14
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.
1 more element
A method of adjusting an electrode spacing between a central electrode and a ground electrode in the manufacture of a prechamber spark plug, comprising the following steps:
- arranging the ground electrode in a lateral hole in a housing such that the ground electrode is arranged freely movably in the lateral hole;
- positioning the ground electrode relative to the fixed central electrode at a predefined electrode spacing by moving the ground electrode in the lateral hole;
- measuring the electrode spacing between central electrode and ground electrode;
- and
- after adjusting the predefined electrode spacing, fastening the ground electrode in the lateral hole so that the predefined electrode spacing is maintained, 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.
2 more elements
Dependencies are inferred from the claim text.