Control apparatus for internal combustion engine
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United States of America Patent
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Sep 23, 2008
Grant Date -
Dec 6, 2007
app pub date -
Apr 16, 2007
filing date -
Jun 5, 2006
priority date (Note) -
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Abstract
A control apparatus for an internal combustion engine, where a calculated fuel injection quantity is corrected with a purge-air-concentration learnt value calculated by subjecting a purge air concentration to purge-air-concentration filtering. A filtering effect in the purge-air-concentration filtering is changed in the direction of enhancing exhaust gas purification, when the purge air concentration is thick and when the purge air concentration is thin, whereby an air/fuel ratio introduced into the internal combustion engine is precisely controlled to a target air/fuel ratio so as to enhance the exhaust gas purification.
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