(under subclass 594) Subject matter wherein the ignition system employs a plurality of independent ignition systems each of which is capable of producing an ignition spark.
(1) Note. These systems may operate in phase adding their outputs to produce a single spark, or may operate out of phase to produce multiple sparks in a single cylinder per combustion cycle.
(2) Note. This subclass may also include ignition systems with a separate system for each cylinder in a multicylinder engine.
