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US 12,191,638 B2Granted
Prechamber spark plug having improved ignition properties
AssigneeRobert Bosch GmbH
InventorsMatthias Blankmeister, Thomas Steidten
Life of this patent
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Abstract
A prechamber spark plug. The prechamber spark plug includes a housing having an external thread with a start of thread, a central electrode and a ground electrode, the central electrode and the ground electrode being arranged in a prechamber, and a cap that closes the prechamber in the direction of a combustion chamber, through-holes for a connection between the prechamber and an outer side of the prechamber spark plug being configured in the housing.
Claims13
A prechamber spark plug, comprising:
- a housing having an external thread with a start of thread;
- a central electrode and a ground electrode, wherein the central electrode and the ground electrode are arranged in a prechamber;
- and
- a cap closing the prechamber towards a combustion chamber;
- wherein through-holes are configured in the housing for a connection between the prechamber and an outer side of the prechamber spark plug,
- wherein each of the through-holes is disposed at a different angle to a center axis of the prechamber spark plug relative to one another.
3 more elements
A method for manufacturing a prechamber spark plug, comprising the following steps:
- providing a housing, wherein an external thread with a start of thread is produced on the housing in one clamping operation, and, in the same clamping operation, at least two through-holes for a connection of a prechamber to an outer side of the prechamber spark plug is formed in the housing,
- wherein each of the through-holes is disposed at a different angle to a center axis of the prechamber spark plug relative to one another.
Dependencies are inferred from the claim text.