US PATENT SUBCLASS 701 / 109
.~.~.~.~.~ Detection of O2 concentration

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  DF  .~.~.~.~ Control of air/fuel ratio or fuel injection {6}
109.~.~.~.~.~ Detection of O2 concentration

DEFINITION

Classification: 701/109

Detection of O2 concentration:

(under subclass 103) Control system wherein the exhaust gas circulation is controlled or modified in response to a sensed oxygen content in the exhaust gas.

SEE OR SEARCH CLASS

123, Internal-Combustion Engines,

531+, for a charge forming device using auxiliary air or gas to inject fuel and 585+ for a charge forming device having auxiliary air or oxygen added to combustible mixture.