US PATENT SUBCLASS 123 / 406.31
.~.~.~.~.~.~ Alcohol concentration responsive

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}
406.31.~.~.~.~.~.~ Alcohol concentration responsive

DEFINITION

Classification: 123/406.31

Alcohol concentration responsive:

(under subclass 406.3) Subject matter wherein the regulating means to vary spark ignition timing is additionally responsive to a signal indicative of the relative proportion of a colorless, volatile, flammable liquid, produced by yeast fermentation of carbohydrates or, synthetically, by hydration of ethylene (e.g., C2H5OH) (i.e., alcohol) per unit of volume of combustible material.