US PATENT SUBCLASS 123 / 406.32
.~.~.~.~.~.~ Having a plurality of speed/load maps related to fuel quality or composition

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}
406.19  DF  .~.~ Closed loop feedback control of spark timing {5}
406.26  DF  .~.~.~ Combustion condition responsive {4}
406.29  DF  .~.~.~.~ Engine knock responsive {4}
406.3  DF  .~.~.~.~.~ Fuel quality or composition signal responsive {2}
406.32.~.~.~.~.~.~ Having a plurality of speed/load maps related to fuel quality or composition

DEFINITION

Classification: 123/406.32

Having a plurality of speed/load maps related to fuel quality or composition:

Subject matter under subclass 406.3 wherein the regulating means to vary spark ignition timing includes (a) more than one digital memory table addressed by both the rate of rotation of the engine output shaft and the resistance to rotation of the engine output shaft and (b) wherein one of the tables is selected according to the signal indicative of either (1) how well the combustible material burns (e.g., octane rating, grade) or (2) the relative proportion of constituent chemicals in the combustible material (e.g., composition).

(1) Note. The engine load may be indicated by fuel injection quantity.

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.