Idle rotation speed learning control apparatus and method of engine
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United States of America Patent
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Jan 25, 2000
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N/A
app pub date -
Jul 2, 1998
filing date -
Jul 4, 1997
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Abstract
In an engine whose target air-fuel ratio during the idle state is set to a leaner value than a theoretical air-fuel ratio, the target air-fuel ratio is forcibly switched to the theoretical air-fuel ratio and the learning is performed, when learning a learning correction quantity of the idle rotation speed, and the learning performed by switching to said theoretical air-fuel ratio is executed only once during an on state of an ignition switch.
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