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ExxonMobil Research files patent application on methods for expanding HCCI and other advanced combustion modes load range with fuel-alcohol blends

Green Car Congress

ExxonMobil Research and Engineering Company has filed a US patent application (# 20100326387 , published 30 December 2010) on methods using a wide range of fuel-alcohol blends to expand the operating envelope of engines operating in advanced combustion modes. reduced maximum rates of pressure increase during HTHR.

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NREL study probes emissions impact of butanol-gasoline blends in light-duty vehicles

Green Car Congress

This fuel’s exhaust emissions contained the lowest total oxygenates among the alcohol blends and the lowest NMOG of all fuels tested. McCormick (2013) “Impact of Higher Alcohols Blended in Gasoline on Light-Duty Vehicle Exhaust Emissions,” Environmental Science & Technology doi: 10.1021/es402793p.

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Study quantifies impact of fuel composition on PM emissions from gasoline direct injection engines

Green Car Congress

2014) “Novel Characterization of GDI Engine Exhaust for Gasoline and Mid-Level Gasoline-Alcohol Blends,” SAE Int. 2015.11.019 Storey, J., Szybist, J., Fuels Lubr. 7(2):571-579 doi: 10.4271/2014-01-1606.

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Team from GM, Ford, FCA reviews how to calculate engine efficiency benefits of high octane fuels

Green Car Congress

Alcohol and gasoline-alcohol blends also offer efficiency benefits independent of their octane value. Higher octane fuel improves the efficiency of today’s engines through reduced spark retard (from optimum) at high loads, and could enable even higher efficiency if engines were optimized for higher-octane fuel.

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Perspective: US Needs to Transition to Hydrous Ethanol as the Primary Renewable Transportation Fuel

Green Car Congress

d) further provides for alcohol blends as follows: Special provisions for alcohol blends. (1) Initial tests conducted in Europe have confirmed that hydrous ethanol can be blended effectively with gasoline without phase separation or other problems. As used in this section and Sec. 40 CFR § 80.27(d)