Method and apparatus for operating traveling spark igniter...

Internal-combustion engines – Igniters

Reexamination Certificate

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C123S620000

Reexamination Certificate

active

07467612

ABSTRACT:
An ignition circuit and a method of operating an igniter (preferably a traveling spark igniter) in an internal combustion engine, including a high pressure engine. A high voltage is applied to electrodes of the igniter, sufficient to cause breakdown to occur between the electrodes, resulting in a high current electrical discharge in the igniter, over a surface of an isolator between the electrodes, and formation of a plasma kernel in a fuel-air mixture adjacent said surface. Following breakdown, a sequence of one or more lower voltage and lower current pulses is applied to said electrodes, with a low “simmer” current being sustained through the plasma between pulses, preventing total plasma recombination and allowing the plasma kernel to move toward a free end of the electrodes with each pulse.

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patent: 6924608 (2005-08-01), Czernichowski et al.
International Search Report for International Application No. PCT/US2006/014840.
Written Opinion dated Aug. 8, 2006 for International Application No. PCT/US2006/014840.

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