US PATENT SUBCLASS 123 / 406.34
.~.~.~.~.~ Modification of knock signal by engine operating condition signal


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}
406.34.~.~.~.~.~ Modification of knock signal by engine operating condition signal {1}
406.35  DF  .~.~.~.~.~.~> Engine operating condition is load or speed {1}


DEFINITION

Classification: 123/406.34

Modification of knock signal by engine operating condition signal:

(under subclass 406.29) Subject matter wherein the regulating means to vary spark ignition timing (a) generates a signal indicative of a measured actual engine operational parameter (e.g., engine speed, engine temperature), (b) produces an initial control output 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, and (c) changes or interrupts the initial control output signal in response to the signal indicative of the measured actual engine operational parameter.

SEE OR SEARCH CLASS

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

111, for a digital or programmed data processing system associated with an internal combustion engine, designed to control or sense vibration, roughness, or knocking condition of the engine, where significant details of the mechanical construction of the component or subsystem within a vehicle are not claimed.