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Study Finds Strong Synergy Between Spark Ignition Engine Downsizing and Low-to-Moderate Alcohol Blend Fuels

Green Car Congress

MAY 1, 2009

Small improvements in thermal efficiency when using E85 under part-load drive cycle conditions are vastly outweighed by the deficit in the calorific value of this fuel. The team studied fuel injection timing and pressure; excess air tolerance; EGR tolerance; and spark retard limits at both part and boosted high load conditions.

Alcohol Blend 186
Alcohol Blend Downsizing Engine Fuel 186
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Team from GM, Ford, FCA reviews how to calculate engine efficiency benefits of high octane fuels

Green Car Congress

AUGUST 25, 2015

fuel with higher ethanol content—for part- and full-load operation for different engine types and fuel assumptions. Alcohol and gasoline-alcohol blends also offer efficiency benefits independent of their octane value. Their paper is published in the ACS journal Environmental Science & Technology. —Leone et al.

Engine 150
Engine Fuel GM Ford 150
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