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Ignition circuit for self-purifying creeping discharge spark plugs

  • US 4,217,873 A
  • Filed: 01/18/1978
  • Issued: 08/19/1980
  • Est. Priority Date: 01/25/1977
  • Status: Expired due to Term
First Claim
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1. An ignition circuit for self-removing carbon deposits from discharge spark plugs, comprising a spark plug including a center electrode and a concentric ground electrode between which is formed a spark gap, said spark gap having a surface along which sparks may move, a capacitor having a capacity between 20 pf and 200 pf located physically adjacent said spark gap and electrically connected in parallel therewith with no intervening components, and an impedance element connected in series with said capacitor and not impeding the movement of electric charge discharged from said capacitor.

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