Fuel tank system for direct ethanol injection octane boosted...

Internal-combustion engines – Miscellaneous – Fuels – lubricants and additives

Reexamination Certificate

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C123S431000, C123S19800E

Reexamination Certificate

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07726265

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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