US PATENT SUBCLASS 324 / 391
.~ Ignition timing

Current as of: June, 1999
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324 /   HD   ELECTRICITY: MEASURING AND TESTING

378  DF  INTERNAL-COMBUSTION ENGINE IGNITION SYSTEM OR DEVICE {12}
391.~ Ignition timing {1}
392  DF  .~.~> Using a pulse signal technique

DEFINITION

Classification: 324/391

Ignition timing:

(under subclass 378) Subject matter including means for measuring the time when a high voltage surge is provided to fire a spark plug for a particular cylinder relative to the position of the piston in the cylinder.

SEE OR SEARCH CLASS

73, Measuring and Testing,

116+, for measuring the timing of engines which do not use an electrical ignition system, for example, diesel engines.