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US 9,166,378 B2Granted
Spark plug, in particular swirl chamber spark plug
AssigneeRobert Bosch GmbH
InventorsJorge Diaz Alfonso, Hermann Kersting
Life of this patent
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Abstract
A spark plug includes: a center electrode having at least one first spark surface and extending along a longitudinal axis of the spark plug; and a ground electrode having at least one second spark surface, the first spark surface being situated diametrically opposed to the second spark surface, so that an ignition spark may be generated between the first and second spark surfaces, the center electrode being rotatable coaxially to the longitudinal axis with respect to the ground electrode, and the first and second spark surfaces being inclined in such a way that rotating the center electrode with respect to the ground electrode makes it possible to set a distance between the first and second spark surfaces.
Claims11
A spark plug, comprising:
- a center electrode including at least one first spark surface, the center electrode extending along a longitudinal axis of the spark plug;
- and
- a ground electrode including at least one second spark surface, wherein the first spark surface is situated diametrically opposed to the second spark surface, so that an ignition spark is generated between the first spark surface and the second spark surface;
- wherein the ground electrode is rotatable coaxially to the longitudinal axis with respect to the center electrode;
- and
- wherein the first spark surface and the second spark surface are inclined in such a way that at least one of rotating the center electrode with respect to the ground electrode and rotating the ground electrode with respect to the center electrode sets a distance between the first spark surface and the second spark surface.
3 more elements
A spark plug, comprising:
- a center electrode including at least one first spark surface, the center electrode extending along a longitudinal axis of the spark plug;
- and
- a ground electrode including at least one second spark surface, wherein the first spark surface is situated diametrically opposed to the second spark surface, so that an ignition spark is generated between the first spark surface and the second spark surface;
- wherein at least one of (i) the center electrode is rotatable coaxially to the longitudinal axis with respect to the ground electrode, and (ii) the ground electrode is rotatable coaxially to the longitudinal axis with respect to the center electrode;
- and
- wherein the first spark surface and the second spark surface are inclined in such a way that at least one of rotating the center electrode with respect to the ground electrode and rotating the ground electrode with respect to the center electrode sets a distance between the first spark surface and the second spark surface
- wherein a combustion chamber-side tool recess is provided on the center electrode, the center electrode being rotatable coaxially to the longitudinal axis with respect to the ground electrode with the aid of the tool recess.
4 more elements
A swirl chamber spark plug for a stationary gas engine, comprising:
- a spark plug including:
- a center electrode including at least one first spark surface, the center electrode extending along a longitudinal axis of the spark plug;
- and
- a ground electrode including at least one second spark surface, wherein the first spark surface is situated diametrically opposed to the second spark surface, so that an ignition spark is generated between the first spark surface and the second spark surface;
- wherein the ground electrode is rotatable coaxially to the longitudinal axis with respect to the center electrode;
- and
- wherein the first spark surface and the second spark surface are inclined in such a way that at least one of rotating the center electrode with respect to the ground electrode and rotating the ground electrode with respect to the center electrode sets a distance between the first spark surface and the second spark surface;
- and
- a cap situated on the combustion chamber side of the spark plug for forming a swirl chamber.
6 more elements
A swirl chamber spark plug for a stationary gas engine, comprising:
- a spark plug including:
- a center electrode including at least one first spark surface, the center electrode extending along a longitudinal axis of the spark plug;
- a ground electrode including at least one second spark surface, wherein the first spark surface is situated diametrically opposed to the second spark surface, so that an ignition spark is generated between the first spark surface and the second spark surface;
- wherein at least one of (i) the center electrode is rotatable coaxially to the longitudinal axis with respect to the ground electrode, and (ii) the ground electrode is rotatable coaxially to the longitudinal axis with respect to the center electrode,
- wherein the first spark surface and the second spark surface are inclined in such a way that at least one of rotating the center electrode with respect to the ground electrode and rotating the ground electrode with respect to the center electrode sets a distance between the first spark surface and the second spark surface;
- and
- a cap situated on the combustion chamber side of the spark plug for forming a swirl chamber,
- wherein the ground electrode is connected non-rotatably to the cap, and the cap is rotatable coaxially to the longitudinal axis with respect to the center electrode for setting the distance between the first spark surface and the second spark surface,
- wherein a tool opening is provided in the cap, and
- wherein the tool opening accommodates a tool inserted through the tool opening for rotating the center electrode.
7 more elements
Dependencies are inferred from the claim text.