| 主权项 |
1. A spark igniter comprising a plurality of electrodes and an insulator, which are configured to form an elongated body having a first end, a second end and an outer surface extending between the first end and the second end;
wherein the outer surface comprises a side surface and an end surface, wherein the end surface is located at the first end, and the side surface extends between the first end and the second end, wherein the spark igniter is configured to form a spark gap on the side surface, which produces a radially-directed spark, wherein the plurality of electrodes comprises a first electrode and a second electrode and at least a portion of the second electrode forms an electrode shell, which surrounds at least a portion of the first electrode and forms at least part of the side surface; wherein the insulator is between the first electrode and the electrode shell, wherein a portion of the side surface is adjacent to the end surface and the electrode shell defines an open end and the first electrode extends through the inside of the electrode shell and out the open end to form a cap forming the end surface and the portion of the side surface adjacent to the end surface, and wherein the spark gap is between the side surface of the cap and the open end of the electrode shell. |
