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US 11,600,971 B2Granted
Prechamber spark plug having an adapted cap geometry
AssigneeRobert Bosch GmbH
InventorsBernd Mueller, Stephan Kaske, Thomas Steidten, Ugur Yilmaz
Life of this patent
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Abstract
A prechamber spark plug. The prechamber spark plug includes: a housing, and a cap which has at least one pass-through opening, the cap being situated at a combustion chamber-side end of the housing. The cap and the housing form a prechamber. An outer cap surface area of the cap, which faces away from the prechamber, has at least one predefined ratio to respectively one further geometric feature of the cap.
Claims13
A prechamber spark plug, comprising:
- a housing;
- and
- a cap which has at least one pass-through opening, the cap being situated on a combustion chamber-side end of the housing, the cap and the housing forming a prechamber, wherein an outer cap surface area of the cap, which faces away from prechamber, has at least one predefined ratio with respect to at least one further geometric feature of the cap,
- wherein the cap has a flange, and the flange is inserted into the housing,
- wherein a second geometric feature of the at least one further geometric feature is a cross-sectional connection area of the flange and the housing in a common cross-sectional plane in an overlapping area of the flange and the housing, and a second ratio of the outer cap surface area to the cross-sectional connection area being at least 1:1 and maximally 3:1.
2 more elements
Dependencies are inferred from the claim text.