US PATENT SUBCLASS 123 / 406.6
.~.~.~.~ Having counter or addressable memory (e.g., digital timing circuit)

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.~.~.~.~ Having counter or addressable memory (e.g., digital timing circuit) {2}
406.61  DF  .~.~.~.~.~> Plural engine shaft position sensors {2}
406.64  DF  .~.~.~.~.~> Memory addressed by engine speed or load {1}

DEFINITION

Classification: 123/406.6

Having counter or addressable memory (e.g., digital timing circuit):

(under subclass 406.59) Subject matter wherein the regulating means to vary spark ignition timing includes a component which either (a) accumulates a total number of input pulses over a predetermined interval or (b) has an information storage section for a value for calculating ignition timing, the information storage section has a label (e.g., integer, symbol, other set of characters, etc.) designating a location where the information is stored for subsequent recall, and the information is directed to the respective label by a signal indicative of an engine parameter.

SEE OR SEARCH THIS CLASS, SUBCLASS:

406.33+, for an internal combustion engine spark ignition timing electronic control responsive to engine knock and having a digital memory.

SEE OR SEARCH CLASS

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

115, for a digital or programmed data processing system

associated with an internal combustion engine, includes specific structure to function either as data storage or as an information interconnecting device, where significant details of the mechanical construction of the component or subsystem within a vehicle are not claimed.