Fuel management system for variable ethanol octane enhancement of gasoline engines

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United States of America Patent

PATENT NO 9695784
SERIAL NO

14982086

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Abstract

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Fuel management system for efficient operation of a spark ignition gasoline engine. Injectors inject an anti-knock agent such as ethanol directly into a cylinder of the engine. A fuel management microprocessor system controls injection of the anti-knock agent so as to control knock and minimize that amount of the anti-knock agent that is used in a drive cycle. It is preferred that the anti-knock agent is ethanol. The use of ethanol can be further minimized by injection in a non-uniform manner within a cylinder. The ethanol injection suppresses knock so that higher compression ratio and/or engine downsizing from increased turbocharging or supercharging can be used to increase the efficiency or the engine.

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Patent Owner(s)

  • MASSACHUSETTS INSTITUTE OF TECHNOLOGY

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bromberg, Leslie Sharon, US 186 3826
Cohn, Daniel R Cambridge, US 153 3332
Heywood, John B Newtonville, US 58 1554

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