Ethanol Direct Injection as an Enabler for Aggressive Engine Downsizing

MIT scientists are exploring the use of ethanol direct injection (DI) to support the use of small, highly turbocharged engines with substantially increased efficiency as a downsizing strategy to reduce fuel consumption and emissions.

The researchers project that ethanol DI could result in a part-load efficiency increase of 30% relative to conventional port-fueled injection engines. The proposed direct injection approach could thus potentially provide a more cost-effective alternative to current generation gasoline-electric hybrids and turbodiesels.

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