US PATENT SUBCLASS 123 / 406.59
.~.~.~ Speed responsive timing control

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}
406.58  DF  .~.~ Having engine shaft rotational position signal generator (e.g., crank shaft, cam shaft) {1}
406.59.~.~.~ Speed responsive timing control {2}
406.6  DF  .~.~.~.~> Having counter or addressable memory (e.g., digital timing circuit) {2}
406.66  DF  .~.~.~.~> With resistor/capacitor (RC) timing circuit (e.g., multivibrator)

DEFINITION

Classification: 123/406.59

Speed responsive timing control:

(under subclass 406.58) Subject matter wherein the regulating means to vary spark ignition timing is further responsive to the rate of rotation of the elongated member.