US PATENT SUBCLASS 123 / 406.14
.~.~.~ Including spark failure responsive means (e.g., misfire)

Current as of: June, 1999
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123 /   HD   INTERNAL-COMBUSTION ENGINES

406.11  DF  SPARK IGNITION TIMING CONTROL {5}
406.12  DF  .~ Electronic control {10}
406.13  DF  .~.~ With fail-safe, backup or malfunction detecting means {5}
406.14.~.~.~ Including spark failure responsive means (e.g., misfire)

DEFINITION

Classification: 123/406.14

Including spark failure responsive means (e.g., misfire):

(under subclass 406.13) Subject matter wherein the regulating means to vary spark ignition timing includes means to detect the omission of the short pulse or flow of electric current which arcs across the pair of electrodes in the combustion chamber of the internal combustion engine.

SEE OR SEARCH THIS CLASS, SUBCLASS:

435, for a combustion charge forming device having means

responsive to cylinder temperature or pressure.

436, for a combustion charge forming device having means responsive to an instantaneous change in engine speed (e.g., roughness).

SEE OR SEARCH CLASS

73, Measuring and Testing,

35.01+, for explosive-detonation or knock measuring and testing, and subclasses 116+ for motor and engine testing. 324, Electricity: Measuring and Testing,

399, for electrical measuring and testing of spark plug condition.