US PATENT SUBCLASS 123 / 406.61
.~.~.~.~.~ Plural engine shaft position sensors

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  DF  .~.~.~ Speed responsive timing control {2}
406.6  DF  .~.~.~.~ Having counter or addressable memory (e.g., digital timing circuit) {2}
406.61.~.~.~.~.~ Plural engine shaft position sensors {2}
406.62  DF  .~.~.~.~.~.~> Position sensors at separate shafts
406.63  DF  .~.~.~.~.~.~> Position sensors having different pulse rates

DEFINITION

Classification: 123/406.61

Plural engine shaft position sensors:

(under subclass 406.6) Subject matter wherein the regulating means for varying spark ignition timing is responsive to more than one transducer which generate the output signal indicative of the rotational position of the same or a different elongated member.