US PATENT SUBCLASS 123 / 406.38
.~.~.~.~.~.~ Knock frequency distribution pattern 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}
406.37  DF  .~.~.~.~.~ Having specific knock detecting means {3}
406.38.~.~.~.~.~.~ Knock frequency distribution pattern responsive

DEFINITION

Classification: 123/406.38

Knock frequency distribution pattern responsive:

(under subclass 406.37) Subject matter wherein an amplitude of the signal indicative of the unusually high force (i.e., outside of normal operating parameters) of the shock wave produced when the combustible mixture of combustible material and oxidant in the combustion chamber is detonated is measured, and the amplitude measurements of the signal are classified according to the number of occurrences per unit of time.

(1) Note. The pattern may be represented as a graph plotting frequency of knock signals against knock signal amplitude measurements.