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US 6,283,106 B1Granted
Control apparatus for internal combustion engine
AssigneeDenso Corporation
InventorsHisashi Kadowaki, Kenji Yamamoto
Life of this patent
Estimating the term…
Abstract
An air/fuel ratio controller/method learns the deviation from a target air/fuel ratio and stores that learned value in a backup memory except when engine compartment temperature is ecessive.
Claims10
A control apparatus for an internal combustion engine for controlling an air/fuel ratio of an exhaust gas in such a manner that the air/fuel ratio conforms to a target air/fuel ratio, said control apparatus comprising:
- learning means for learning a deviation of an actual air/fuel ratio from the target air/fuel ratio;
- backup memory means for backing up a learned value of said deviation learned by said learning means;
- temperature determining means for determining a temperature in an engine compartment;
- and
- learning control means for prohibiting backing up said learned value when said engine compartment temperature is higher than a predetermined temperature.
2 more elements
A method for controlling the air/fuel ratio of an internal combustion engine exhaust gas in such a manner that the air/fuel ratio conforms to a target air/fuel ratio, said control method comprising:
- determining the deviation of actual air/fuel ratio from a target air/fuel ratio;
- and
- storing the determined deviation in a backup memory unless engine compartment temperature is higher than a predetermined temperature.
Dependencies are inferred from the claim text.