US PATENT SUBCLASS 123 / 406.29
.~.~.~.~ Engine knock 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.~.~.~.~ Engine knock responsive {4}
406.3  DF  .~.~.~.~.~> Fuel quality or composition signal responsive {2}
406.33  DF  .~.~.~.~.~> With modifying or updating memory (i.e., learning)
406.34  DF  .~.~.~.~.~> Modification of knock signal by engine operating condition signal {1}
406.37  DF  .~.~.~.~.~> Having specific knock detecting means {3}

DEFINITION

Classification: 123/406.29

Engine knock responsive:

(under subclass 406.26) Subject matter wherein the regulating means is responsive to a signal indicative of an unusually high force (i.e., outside of normal operating parameters) of a shock wave produced when the combustible mixture of combustible material and oxidant in the combustion chamber is detonated.

SEE OR SEARCH THIS CLASS, SUBCLASS:

406.16, for a spark ignition timing electronic control responsive to knock control malfunction.

406.21, for a spark ignition timing electronic control having a closed loop feedback control of timing with a separate knock responsive control for each cylinder.

SEE OR SEARCH CLASS

73, Measuring and Testing,

35.01+, for explosive-detonation or knock measuring and testing. 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.