Back to results
US 12,113,335 B2Granted
Pre-chamber spark plug with improved heating behavior
AssigneeRobert Bosch GmbH
InventorsAndreas Benz, Matthias Blankmeister
Life of this patent
Estimating the term…
Abstract
A pre-chamber spark plug. The pre-chamber spark plug includes a housing, a pre-chamber, a cap that closes the pre-chamber on the housing and that has one or more through-openings, and an ignition device situated in the pre-chamber. The cap has a cap base and a cap jacket. The cap jacket and a housing inner wall of the housing defines a pre-chamber inner wall. The pre-chamber is defined by the pre-chamber inner wall and the cap base. At least one rib projects into the pre-chamber is formed in the region of the pre-chamber inner wall.
Claims16
A pre-chamber spark plug, comprising:
- a housing;
- a pre-chamber;
- a cap that closes the pre-chamber on the housing and that has one or more through-openings;
- and
- an ignition device situated in the pre-chamber;
- wherein the cap has a cap base and a cap jacket, the cap jacket and a housing inner wall of the housing defining a pre-chamber inner wall, and the pre-chamber being defined by the pre-chamber inner wall and the cap base,
- wherein at least one elongated rib projecting into the pre-chamber is formed in an area of the pre-chamber inner wall, and
- wherein the area is inside the cap jacket, and wherein the elongated rib has a longitudinal dimension greater than a height of the elongated rib.
5 more elements
A pre-chamber spark plug, comprising:
- a housing;
- a pre-chamber;
- a cap that closes the pre-chamber on the housing and that has one or more through-openings;
- and
- an ignition device situated in the pre-chamber;
- wherein the cap has a cap base and a cap jacket, the cap jacket and a housing inner wall of the housing defining a pre-chamber inner wall, and the pre-chamber being defined by the pre-chamber inner wall and the cap base,
- wherein at least one rib projecting into the pre-chamber is formed in an area of the pre-chamber inner wall, and
- wherein the through-opening in the cap is situated such that a gas flow of inflowing gas through the through-opening is directed onto the rib.
5 more elements
A pre-chamber spark plug, comprising:
- a housing;
- a pre-chamber;
- a cap that closes the pre-chamber on the housing and that has one or more through-openings;
- and
- an ignition device situated in the pre-chamber;
- wherein the cap has a cap base and a cap jacket, the cap jacket and a housing inner wall of the housing defining a pre-chamber inner wall, and the pre-chamber being defined by the pre-chamber inner wall and the cap base,
- wherein at least one rib projecting into the pre-chamber is formed in an area of the pre-chamber inner wall, and
- wherein the rib is made of a different material from the cap and of a different material from the housing.
5 more elements
A pre-chamber spark plug, comprising:
- a housing;
- a pre-chamber;
- a cap that closes the pre-chamber on the housing and that has one or more through-openings;
- and
- an ignition device situated in the pre-chamber;
- wherein the cap has a cap base and a cap jacket, the cap jacket and a housing inner wall of the housing defining a pre-chamber inner wall, and the pre-chamber being defined by the pre-chamber inner wall and the cap base,
- wherein at least one rib projecting into the pre-chamber is formed in an area of the pre-chamber inner wall, and
- wherein the at least one rib includes a plurality of ribs which have the same geometrical dimensions.
5 more elements
A pre-chamber spark plug, comprising:
- a housing;
- a pre-chamber;
- a cap that closes the pre-chamber on the housing and that has one or more through-openings;
- and
- an ignition device situated in the pre-chamber;
- wherein the cap has a cap base and a cap jacket, the cap jacket and a housing inner wall of the housing defining a pre-chamber inner wall, and the pre-chamber being defined by the pre-chamber inner wall and the cap base,
- wherein at least one rib projecting into the pre-chamber is formed in an area of the pre-chamber inner wall, and
- wherein the rib has a reduced width at a fixing region at which a fixing to the pre-chamber inner wall takes place.
5 more elements
An internal combustion engine of a vehicle, comprising:
- a pre-chamber spark plug, including:
- a housing,
- a pre-chamber,
- a cap that closes the pre-chamber on the housing and that has one or more through-openings, and
- an ignition device situated in the pre-chamber;
- wherein the cap has a cap base and a cap jacket, the cap jacket and a housing inner wall of the housing defining a pre-chamber inner wall, and the pre-chamber being defined by the pre-chamber inner wall and the cap base, and
- wherein at least one elongated rib projecting into the pre-chamber is formed in an area of the pre-chamber inner wall, and
- wherein the area is inside the cap jacket, and wherein the elongated rib has a longitudinal dimension greater than a height of the elongated rib.
5 more elements
Dependencies are inferred from the claim text.