Method for producing a spark plug, and spark plug
AssigneeRobert Bosch GmbH
InventorRonald Ritter
Life of this patent
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Abstract
A method for producing a spark plug including a spark plug electrode assembly having a center electrode and a ground electrode surrounding the center electrode. The spark plug electrode assembly is formed from a one-piece spark plug electrode base body made of spark plug electrode material, and the ground electrode and the center electrode are connected to one another by a connecting region, wherein the center electrode and an inner surface of the ground electrode are polygonal. The method includes: a) connecting the spark plug electrode assembly to a spark plug base body, and b) removing the connecting region between the ground electrode and the center electrode.
Claims13
A method for producing a spark plug, the spark plug including a spark plug electrode assembly having a center electrode and a ground electrode surrounding the center electrode, the method comprising the following steps:
- forming the spark plug electrode assembly from a one-piece spark plug electrode base body made of spark plug electrode material, and the ground electrode and the center electrode being connected to one another by a connecting region, and wherein the center electrode and an inner surface of the ground electrode are polygonal;
- connecting the spark plug electrode assembly to a spark plug base body;
- and
- removing the connecting region between the ground electrode and the center electrode,
- wherein the center electrode is quadrangular, and an inner surface of the ground electrode is octagonal.
A spark plug, comprising:
- a ground electrode;
- a center electrode, wherein the ground electrode surrounds the center electrode, and wherein the center electrode and an inner surface of the ground electrode are polygonal;
- and
- small noble metal plates arranged on connection surfaces of the between two corners of the ground electrode and the center electrode, wherein a spark gap is formed between a small noble metal plate of the ground electrode and a small noble metal plate of the center electrode;
- wherein the corners of the center electrode include small noble metal plate-free regions,
- wherein the center electrode is quadrangular, and an inner surface of the ground electrode is octagonal.
Dependencies are inferred from the claim text.