US PATENT SUBCLASS 123 / 406.19
.~.~ Closed loop feedback control of spark timing

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.~.~ Closed loop feedback control of spark timing {5}
406.2  DF  .~.~.~> Separate control for each cylinder {2}
406.23  DF  .~.~.~> Engine output (e.g., torque, speed, horsepower) or fuel consumption optimization
406.24  DF  .~.~.~> Including means responsive to the instantaneous change in engine speed (e.g., roughness, unstable combustion, etc.) {1}
406.26  DF  .~.~.~> Combustion condition responsive {4}
406.44  DF  .~.~.~> Exhaust gas condition responsive control of spark timing

DEFINITION

Classification: 123/406.19

Closed loop feedback control of spark timing:

Subject matter under subclass 406.12 wherein the regulating means (a) measures an actual engine parameter, and produces an initial control output signal to alter spark ignition timing, (b) compares the measured parameter to a target value, and (c) if necessary, modifies the spark ignition timing to cause the measured parameter to achieve the target value.

SEE OR SEARCH CLASS

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

101+, for a data processing system associated with an internal-combustion engine, where significant details of the mechanical construction of the component or subsystem within a vehicle are not claimed.