Control apparatus for internal combustion engine
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United States of America Patent
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Nov 3, 2009
Grant Date -
May 22, 2008
app pub date -
Jan 7, 2008
filing date -
Mar 18, 2005
priority date (Note) -
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Abstract
An engine ECU executes a program including the steps of: calculating a fuel injection ratio of an in-cylinder injector; calculating an amount of spark advance using a first map employed when the in-cylinder injector has a fuel injection ratio of one, said first map providing a timing of ignition with a maximum amount of spark advance; calculating an amount of spark advance using a second map employed for a fuel injection ratio of zero, said second map providing a timing of ignition with a minimum amount of spark advance; and calculating an amount of spark advance using a third map employed for a fuel injection ratio larger than zero and smaller than one, said third map providing a timing of ignition with a larger amount of spark advance for a larger ratio.
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