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University of Wisconsin Researchers Investigating Dual-Fuel (Gasoline and Diesel) Partially Premixed Combustion for High-Efficiency, Ultra-Low Emission Combustion; 53% Thermal Efficiency

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Researchers at the University of Wisconsin, led by Dr. Rolf Reitz, are investigating a blended dual-fuel (gasoline and diesel) concept to extend the operating range of partially premixed charge compression ignition combustion by using the varying fuel reactivity of the charge blend, which is determined in real time. Rolf Reitz.

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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% Earlier post.). —Kokjohn and Reitz. Sage L Kokjohn and Rolf D.

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Study shows viability of RCCI in a two-stroke engine; higher efficiency than direct-injection spark ignition

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A team at the Engine Research Center (ERC), University of Wisconsin-Madison has demonstrated the viability of reactivity-controlled compression ignition (RCCI) in a two-stroke engine. The researchers suggested that further design optimization might enable the use of a standard diesel fuel instead of n-heptane. Earlier post.)

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UW-Madison engineer collaborating with entrepreneur on 6-cycle, external combustion engine; could be up to 30% more efficient than standard diesel

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Shedd said the engine could be up to about 30% more efficient than a standard diesel engine, depending on the engine load and speed. In contrast, he says, the K6 can be made by modifying existing diesel engines in a way that is both realistic and manufacturable. —Timothy Shedd. —Tim Shedd.

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Study: even with high LDV electrification, low-carbon biofuels will be necessary to meet 80% GHG reduction target; “daunting” policy implications

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The Wisconsin and Michigan team normalized the highly detailed vehicle assumptions and transport calculations from these studies around the rates of electrified vehicle penetration; travel demand growth; and electricity decarbonization. to the point where gasoline and diesel consumption is reduced to 50% of 2011 levels).

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U Wisc. study explores effects of biodiesel-gasoline blend in diesel engine

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One high-efficiency combustion concept under investigation is gasoline compression ignition (GCI)—the use of gasoline-like fuels to deliver very low NO x and PM emissions as well as high efficiency in a diesel compression ignition engine. direct-injection light-duty diesel engine. Earlier post.) —Adams et al. Kalghatgi, G.,

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Promising Delphi 1st-gen Gasoline Direct Injection Compression Ignition engine meeting ultra fuel efficient program targets

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Compared to new diesel engines, the Delphi team found that BSFC for GDCI at light loads was comparable or better, and at high loads was about 5% higher. A high octane fuel was injected late on the compression stroke of a boosted diesel engine operating with high EGR. Earlier post , earlier post.). Background. Earlier post.)

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