US PATENT SUBCLASS 123 / 406.13
.~.~ With fail-safe, backup or malfunction detecting means

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}
406.13.~.~ With fail-safe, backup or malfunction detecting means {5}
406.14  DF  .~.~.~> Including spark failure responsive means (e.g., misfire)
406.15  DF  .~.~.~> Fuel sensor malfunction responsive
406.16  DF  .~.~.~> Knock control malfunction responsive
406.17  DF  .~.~.~> Cylinder pressure sensor malfunction responsive
406.18  DF  .~.~.~> Engine shaft rotational position sensor malfunction responsive (e.g., crank shaft, cam shaft)

DEFINITION

Classification: 123/406.13

With fail-safe, backup or malfunction detecting means:

(under subclass 406.12) Subject matter wherein the regulating means to vary spark ignition timing includes electrical adjusting means that upon detecting failure in a circuit or circuit element (a) shifts operation (1) into a substitute circuit or (2) to a substitute mechanism to accomplish the same function, or (b) indicates functioning of the circuit or circuit element outside of acceptable parameters.

SEE OR SEARCH THIS CLASS, SUBCLASS:

519, for a fail-safe, backup or malfunction detecting circuit for an engine fuel system having a fuel vapor recovery and storage system having an absorbent canister.

568.15, for a fail-safe, backup, or malfunction detecting means for an exhaust gas recirculation (EGR) system.

630+, for a safety device for a high tension ignition system which do not include timing control.

690, for a fail-safe, backup or malfunction detecting means for an exhaust gas condition responsive combustion charge forming device.

SEE OR SEARCH CLASS 324, Electricity: Measuring and Testing

378+, for electrical measuring and testing of internal combustion engine ignition systems or device.

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

107, for a digital or programmed data processing system associated with an internal combustion engine designed to detect an abnormality in operating conditions and carry out the appropriate sequence of instructions to stabilize the air/fuel ratio or fuel injection operation, where significant details of the mechanical construction of the component or subsystem within a vehicle are not claimed.