Spark plug having long service life
AssigneeRobert Bosch GmbH
InventorsDetlef Hartmann, Andreas Benz, Mario Fleischhauer, Jochen Fischer
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Abstract
A spark plug, including a central electrode, a first ground electrode, which is situated in a curved shape having a horizontal area and an essentially vertical area, and at least one second ground electrode, which is situated adjacent to the central electrode in such a way that a distance between the first ground electrode and the central electrode is less than a distance between the second ground electrode and the central electrode.
Claims15
A method for generating sparks in a spark plug, comprising:
- attaching a first ground electrode and a second ground electrode to the spark plug;
- positioning the first ground electrode and the second ground electrode at a first distance and a second distance, respectively, from a central electrode, wherein the second distance is greater than the first distance;
- generating a spark during operation only between the first ground electrode and the central electrode;
- removing the first ground electrode from the spark plug;
- repositioning the second ground electrode to the first distance from the central electrode;
- and
- generating a spark during operation only between the second ground electrode and the central electrode.
A method for using a spark plug in an internal combustion engine, the method comprising:
- attaching a first ground electrode and a second ground electrode to the spark plug;
- positioning the first ground electrode and the second ground electrode at a first distance and a second distance, respectively, from a central electrode, wherein the second distance is greater than the first distance such that during operation sparks are generated only between the first ground electrode and the central electrode;
- removing the first ground electrode from the spark plug after operation;
- repositioning the second ground electrode to the first distance from the central electrode such that during operation sparks are generated only between the second ground electrode and the central electrode.
A method for using a spark plug in a heavy-duty motor vehicle, the method comprising:
- attaching a first ground electrode and a second ground electrode to the spark plug;
- positioning the first ground electrode and the second ground electrode at a first distance and a second distance, respectively, from a central electrode, wherein the second distance is greater than the first distance such that during operation sparks are generated only between the first ground electrode and the central electrode;
- removing the first ground electrode from the spark plug after operation;
- repositioning the second ground electrode to the first distance from the central electrode such that during operation sparks are generated only between the second ground electrode and the central electrode.
Dependencies are inferred from the claim text.