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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

A higher compression ratio can be used if an engine will operate primarily at light loads, such that degraded efficiency at high loads is more than offset by improved efficiency at light loads. The compression ratio selected for a particular engine depends, the authors note, on the expected duty cycle and fuel octane.

Engine 150
Engine Fuel GM Ford 150
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Developing Fords EcoBoost Combustion System

Green Car Congress

APRIL 29, 2009

Ford’s turbocharged, gasoline direct injection EcoBoost engines are targeted to play a significant near-term role in Ford’s efforts to reduce fuel consumption by enabling downsizing. Some of the droplets may escape into the exhaust system and result in high UHC emissions. The first application of this technology bundle in a 3.5L

Ford 199
Ford 2009 Engine Davis 199
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