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U Wisconsin team investigates RCCI and GCI in single engine using adaptive dual-fuel injector

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Researchers at the University of Wisconsin-Madison have investigated blending the benefits of reactivity controlled compression ignition (RCCI) and gasoline compression ignition (GCI) using QuantLogic’s novel adaptive dual-fuel injector which is capable of direct injecting both gasoline and diesel fuel in a single cycle.

Wisconsin 150
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Hydrogen Opposed Piston Engine Working Group formed

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—James Turner, Professor of Mechanical Engineering, Clean Combustion Research Center, King Abdullah University of Science and Technology (KAUST). Bourns College of Engineering – Center for Environmental Research and Technology, University of California, Riverside, Riverside, CA. ID-Technologies, Fribourg, Switzerland.

Hydrogen 353
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UW Madison team investigates cycle-to-cycle combustion instability in HCCI and RCCI

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Researchers at the University of Wisconsin-Madison have used computational fluid dynamics modeling to investigate cycle-to-cycle instability of homogeneous charge compression ignition (HCCI) and reactivity-controlled compression ignition (RCCI) engines—two approaches to low-temperature combustion.

Wisconsin 329
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DOE awards $4M to two DME projects

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The funded projects include: University of Wisconsin Madison for “Efficiency Mixing Controlled Compression Ignition Combustion of Propane DME Blends”. WM International Engineering L.L.C. Oberon Fuels, the first company to produce renewable DME (rDME) in the US, is a supporting partner.

Waste 186
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Light duty RCCI can deliver engine-out Tier 2 Bin 5 NOx; potential for 52% gross indicated efficiency

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Rolf Reitz of the University of Wisconsin found that reactivity controlled compression ignition (RCCI) ( earlier post ) in a light-duty engine can meet Tier 2 Bin 5 NO x levels without aftertreatment, while offering a 4% improvement in fuel consumption and 7.3% Their paper is published in the International Journal of Engine Research.

Light 207
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U. of Wisconsin RCCI combustion work progressing; modeled 53% gross indicated efficiency in a light-duty engine could result in 2x fuel savings compared to SI gasoline

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In contrast to conventional diesel combustion, the highest temperature for RCCI combustion in center of chamber (adiabatic core). The high temperature in conventional diesel combustion is next to the piston bowl surface. Gasoline-diesel operation was demonstrated at engine loads up to 14.5 Source: Rolf Reitz. Click to enlarge.

Wisconsin 249
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Latest test results for Achates Power two-stroke opposed-piston engine show 20% improvement over four-stroke diesel; BTE of 45.1% at best operating point

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Achates Power has demonstrated newly increased engine fuel efficiency results in every quarter of 2011, beginning with a 13% efficiency advantage presented at the Symposium on International Automotive Technology (SIAT) in January, a 15.5% g/kWh BSFC for the Achates engine, versus 239.9 g/kWh for the reference engine. Earlier post.).

Engine 257