Patent ID: 7741762

Claim:
A spark igniter for an engine having at least one engine cylinder, comprising: a spark plug body; a first electrode, extending a first distance from the top of the spark plug body; a second electrode, spaced from the first electrode and extending from the top of the spark body a second distance, which is greater than that of the first electrode; a ground strap connected to electrical ground, and having a spark gap from the second electrode; and a precombustion chamber enclosing the first electrode and the second electrode, the chamber having a bottom end and having a top end with at least one orifice in fluid communication with the at least one engine cylinder; wherein the spark end of the first electrode is closer to the bottom end of the precombustion chamber than the spark end of the second electrode, and the spark end of the second electrode is closer to the top end of the precombustion chamber than the spark end of the first electrode.