US PATENT SUBCLASS 123 / 406.12
.~ Electronic 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.~ Electronic control {10}
406.13  DF  .~.~> With fail-safe, backup or malfunction detecting means {5}
406.19  DF  .~.~> Closed loop feedback control of spark timing {5}
406.45  DF  .~.~> Including control of combustible mixture or a constituent thereof (e.g., air, fuel, exhaust gas) {3}
406.49  DF  .~.~> Barometric pressure responsive
406.5  DF  .~.~> Acceleration or deceleration responsive {1}
406.52  DF  .~.~> Throttle position responsive
406.53  DF  .~.~> Starting condition responsive {1}
406.55  DF  .~.~> Temperature responsive (e.g., ambient, engine, etc.)
406.56  DF  .~.~> With magneto {1}
406.58  DF  .~.~> Having engine shaft rotational position signal generator (e.g., crank shaft, cam shaft) {1}

DEFINITION

Classification: 123/406.12

Electronic control:

(under subclass 406.11) Subject matter wherein the regulator means for varying spark ignition timing includes an electrical component which either (a) modifies an electrical input signal to the component, or (b) creates an electrical output signal from the component.

(1) Note. An electronic control to be proper for this and the indented subclasses must do more than merely complete a circuit (e.g., a switch), it must modify the electrical input signal being received or create an electrical output signal (e.g., amplification, signal generation, signal processing, signal control, etc.). Therefore, a transistor acting as a switch would be proper.

SEE OR SEARCH THIS CLASS, SUBCLASS:

406.67+, for ignition timing control actuated by engine vacuum.

406.75, for a centrifugal ignition timing mechanism.

SEE OR SEARCH CLASS

701, Data Processing: Vehicles, Navigation, and Relative Location,

101+, for a data processing system associated with an internal-combustion engine, where significant details of the mechanical construction of the component or subsystem within a vehicle are not claimed.