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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. fuels often do not auto-ignite at low loads.

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DOE Co-Optima report identifies top ten bio-blendstocks for efficiency in boosted SI engines

Green Car Congress

A new Co-Optimization of Fuels & Engines (Co-Optima) report describes the top ten biofuel-derived blendstock candidates. These top candidates, when blended with petroleum and used in a boosted spark ignition (BSI) engine, will offer environmental benefits and boost energy efficiency all while being available at a competitive price.

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Study of Vapor Pressures of Gasoline-Alcohol Blends Finds That Dual-Alcohol Blends Can Result in RVPs Identical to That of Gasoline

Green Car Congress

RVPs (predicted DVPE) of single- and dual-alcohol blends in gasoline with different relative proportions of ethanol and 1-butanol. Vapor pressure can affect proper cold starting of the engine; vapor lock tendency in older engines without fuel injection; and quality of starting in engines with fuel injection.

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GM and U Mich receive patent on plug-in series hybrid/extended range electric vehicle powertrain using multiple free piston linear alternator engines

Green Car Congress

The GM/U Mich patent envisages using multiple free-piston engines (240A through 240D in the patent drawing). The covered hybrid powertrain uses the multiple reciprocating free-piston linear alternator engines to generate electric power for the battery pack or the traction motor. Click to enlarge. Patent Drawing of an FPLA.

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DOE Co-Optima researchers identify 6 high-potential blendstocks

Green Car Congress

Ten blendstocks from four chemical familes with the greatest potential to increase boosted SI engine efficiency (as determined by merit function scores). Co-Optima research and analysis identified the fuel properties needed for optimal operation of boosted SI LD engines through development of a merit function. Source: DOE.

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Geely invests in Carbon Recycling Intl.; vehicles fueled by methanol from CO2, water and renewable energy

Green Car Congress

Geely Auto has invested significant resources in the development and promotion of methanol-fueled engines and vehicles over a long period and has already made progress with this technology in China. Methanol in China. Delving into the emissions side, Chen et al. times higher than that from gasoline. and Gong, H. and Gong, H. Sileghem, L.,

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

Green Car Congress

The Brazilian experience shows that the presence of small (<10%) amounts of water in the fuel does not in itself cause a greater tendency to misfire in spark ignition engines than a proportionate leaning of the fuel/air mixture would do, provided that the vapor pressure of the hydrated ethanol at the ambient temperature is high enough.