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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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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. Earlier post.)

Wisconsin 150
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Promising Delphi 1st-gen Gasoline Direct Injection Compression Ignition engine meeting ultra fuel efficient program targets

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In 2010, The US Department of Energy (DOE) selected Delphi, along with partners Hyundai America Technical Center, Inc (HATCI); Wisconsin Engine Research Consultants (WERC); and the University of Wisconsin-Madison (UW) for a $7.48-million Earlier post , earlier post.). Background. Earlier post.) FSN (smoke number).

Gasoline 304
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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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Bombardier introduces new, more efficient and cleaner Evinrude outboards

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Using advanced computational fluid dynamics software developed by the University of Wisconsin, BRP crafted the entire engine around the moment of combustion and developed the first outboard engine block designed specifically for direct-injection technology. The E-TEC incorporates pistons made from a new alloy originally developed by NASA.

Cleaner 225
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GM exploring different valving strategies to extend HCCI operation for high loads; benefits of a Positive Valve Overlap approach

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(Najt, then at the University of Wisconsin, and David Foster published the first study of a gasoline-fueled four-stroke HCCI engine in 1983.). Peak valve lift of intake and exhaust valves was varied based on the strategy. In NVO, peak valve lift of intake and exhaust valves was 5.0 mm and 6.0 mm, respectively.

GM 218
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Hydrogen Opposed Piston Engine Working Group formed

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OP engines utilize direct injection after ports closure to avoid the risk of fuel short circuiting out the exhaust. Engine Research Center, University of Wisconsin-Madison, Madison, WI. According to Achates Power, the two main technical challenges for H 2 -OPE are fuel injection and ignition source. Fuel Injection.

Hydrogen 353