US PATENT SUBCLASS 123 / 406.44
.~.~.~ Exhaust gas condition responsive 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  DF  .~.~ Closed loop feedback control of spark timing {5}
406.44.~.~.~ Exhaust gas condition responsive control of spark timing

DEFINITION

Classification: 123/406.44

Exhaust gas condition responsive control of spark timing:

(under subclass 406.19) Subject matter wherein the regulating means to vary spark ignition timing is responsive to a signal indicative of characteristic or parameter of the products of combustion (e.g., composition, temperature, pressure, etc.) of the engine.

SEE OR SEARCH THIS CLASS, SUBCLASS:

672+, for an internal combustion engine charge forming device responsive to exhaust gas condition.

SEE OR SEARCH CLASS

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

108, for a digital or programmed data processing system associated with an internal combustion engine, designed to control the air/fuel ratio or fuel injection to change the exhaust gas system, where significant details of the mechanical construction of the component or subsystem within a vehicle are not claimed, subclass 109 for a digital or programmed data processing system associated with an internal combustion engine where exhaust gas circulation is controlled or modified in response to a sensed oxygen content in the exhaust gas, where significant details of the mechanical construction of the component or subsystem within a vehicle are not claimed.