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US 8,146,553 B2Granted
Spark plug for an internal combustion engine and method for the operation thereof
AssigneeRobert Bosch GmbH
InventorsWerner Herden, Manfred Vogel, Heiko Ridderbusch
Life of this patent
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Abstract
A spark plug for an internal combustion engine having a light guide device for supplying the spark plug with optical radiant power. A sensor arrangement is at least partially integrated into the spark plug but disposed outside the light guide device, and is embodied for the acquisition of operating data of the spark plug and/or of a combustion chamber associated with the spark plug.
Claims11
A spark plug device for an internal combustion engine, comprising:
- a spark plug;
- a light guide device for supplying an ignition laser integrated into the spark plug with pump light, wherein the ignition laser is at least partially transparent to light of a first wavelength region that is radiated from a combustion chamber into the spark plug, the first wavelength region extending from approximately 200 nm to approximately 900 nm;
- and
- an optical beam splitter, associated with the light guide device, for separating light of the first wavelength region from the pump light.
1 more element
A method for operating a spark plug for an internal combustion engine, the method comprising:
- using a light guide device of the spark plug for supplying the spark plug with pump light, the spark plug having an integrated ignition laser that is at least partially transparent to light of a first wavelength region that is radiated from a combustion chamber into the spark plug, the first wavelength region extending from approximately 200 nm to approximately 900 nm;
- and
- acquiring operating data of at least one of the spark plug and a combustion chamber associated with the spark plug by an optical beam splitter, associated with the light guide device, for separating light of the first wavelength region from the pump light.
Dependencies are inferred from the claim text.