Method and system for engine control
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United States of America Patent
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Feb 9, 2016
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app pub date -
Apr 1, 2013
filing date -
Apr 1, 2013
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Abstract
Methods and systems are provided for controlling exhaust emissions by adjusting an injection profile for different fuels injected into an engine cylinder from different fuel injectors during engine start and crank. By splitting fuel injection during start and cranking so that fuel of lower alcohol content is port injected and fuel of higher alcohol content is direct injected as one or multiple injections, the soot load of the engine can be reduced and fuel economy can be improved.
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