Air fuel ratio control device of engine
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United States of America Patent
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Sep 24, 2013
Grant Date -
Oct 20, 2011
app pub date -
Apr 7, 2011
filing date -
Apr 16, 2010
priority date (Note) -
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Abstract
An air-fuel ratio control device comprising a fuel supply unit, engine operation state detector, air-fuel ratio information detector, and an electronic control unit is disclosed. The electronic control unit determines a fuel injection amount which realizes a target air-fuel ratio while using engine load information by the engine operation state detector on the basis of air-fuel ratio information by the air-fuel ratio information detector, and then outputs a driving signal to the fuel supply unit, to execute feedback control mainly at an excessively rich side air-fuel ratio, characterized in that the air-fuel ratio information detector is an exhaust gas temperature sensor.
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