US PATENT SUBCLASS 73 / 23.32
.~.~ Air-fuel ratio

Current as of: June, 1999
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73 /   HD   MEASURING AND TESTING

23.2  DF  GAS ANALYSIS {15}
23.31  DF  .~ Gas of combustion {1}
23.32.~.~ Air-fuel ratio {1}
23.33  DF  .~.~.~> Solid content

DEFINITION

Classification: 73/23.32

Air-fuel ratio:

(under subclass 23.31) Subject matter wherein the ratio of the amount of air to the amount of fuel in the gas of combustion is determined.

SEE OR SEARCH CLASS

123, Internal-Combustion Engines,

434+, and particularly subclasses 672+ for measuring the composition of exhaust gas and utilizing the measurement to control the air-fuel ratio.