Fuel tank system for direct ethanol injection octane boosted gasoline engine
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United States of America Patent
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Jun 1, 2010
Grant Date -
Mar 6, 2008
app pub date -
Mar 9, 2007
filing date -
Mar 10, 2006
priority date (Note) -
Expired
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Abstract
Fuel tank system for a direct ethanol injection octane boosted gasoline engine. The system includes a gasoline engine and a main fuel tank that contains a mix of gasoline and gasoline E85. A smaller secondary tank is provided to contain ethanol or E85. An injector directly injects in a separately controlled fashion ethanol or E85 into a cylinder of the engine to boost octane. A control module controls the relative amounts of gasoline and ethanol used and structure is provided for fueling the main and secondary fuel tanks.
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