US PATENT SUBCLASS 701 / 103
.~.~.~.~ Control of air/fuel ratio or fuel injection

Current as of: June, 1999
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701 /   HD   DATA PROCESSING: VEHICLES, NAVIGATION, AND RELATIVE LOCATION

1  DF  VEHICLE CONTROL, GUIDANCE, OPERATION, OR INDICATION {19}
99  DF  .~ With indicator or control of power plant (e.g., performance) {2}
101  DF  .~.~ Internal-combustion engine {1}
102  DF  .~.~.~ Digital or programmed data processor {7}
103.~.~.~.~ Control of air/fuel ratio or fuel injection {6}
104  DF  .~.~.~.~.~> Controlling fuel quantity
105  DF  .~.~.~.~.~> Controlling timing
106  DF  .~.~.~.~.~> Artificial intelligence (e.g., fuzzy logic)
107  DF  .~.~.~.~.~> Fail-safe system
108  DF  .~.~.~.~.~> Exhaust gas circulation (EGC)
109  DF  .~.~.~.~.~> Detection of O2 concentration

DEFINITION

Classification: 701/103

Control of air/fuel ratio or fuel injection:

(under subclass 102) Control system wherein the digital or programmed data processing system is designed to control the air/fuel ratio or the injection of fuel based on engine operating conditions or environmental conditions.

SEE OR SEARCH CLASS

123, Internal-Combustion Engines,

406.45, for electronic control of combustible mixture or a constituent thereof, subclass 480 for fuel injection which includes a microprocessor, and subclass 486 for digital memory addressed by an engine parameter.