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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% —Kokjohn and Reitz. Sage L Kokjohn and Rolf D.

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Swiss team concludes that particulate filters should be mandatory for GDI engines

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The Paul Scherrer Institute (PSI), Bern University of Applied Sciences, the University of Applied Sciences and Arts Northwestern Switzerland, several industrial partners and Empa were all involved. By way of comparison, a current Peugeot 4008 (2013, Euro 5b) with a diesel engine and a particle filter was also included.

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Study finds ethanol blending appears to reduce significantly genotoxic emissions from gasoline direct injection vehicles

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A research team from Empa (Swiss Federal Laboratories for Materials Science and Technology) and the University of Applied Sciences Bern, Laboratory for Exhaust Emission Control, reports that ethanol blending appeared to reduce genotoxic emissions from a flex-fuel Euro-5 gasoline direct injection (GDI) vehicle (a Volvo V60 with a 1.6

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Researchers develop alkali- and sulfur-resistant tungsten-based catalysts for SCR NOx control

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Researchers at Fudan University, with colleagues at the University of Jinan and Chongqing University, have developed alkali- and sulfur-resistant tungsten-based catalysts for SCR NO x emissions control. Na and K) and alkaline earth metals impurities in a light-duty application. Williams, A., McCormick, R.,

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Cummins progressing with lightweight downsized T2B2 diesel for pickup; 40% improvement in fuel economy over gasoline V8

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In 2013, the Cummins-led team demonstrated a Tier 2 Bin 5 version of the engine on the dyno, and then on a vehicle, while development of the Tier 2 Bin 2 engine started. Exhaust system configuration. SCR coated on filter (SCR-F) allows for close coupling of an SCR (selective catalytic reduction) function for fast light off.

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UC Berkeley study quantifies LD gasoline on-road emissions

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Based on on-road measurements in their study, a team from the University of California Berkeley has estimated that, as of 2010, light-duty (LD) gasoline vehicles were responsible for 85% of CO; 18% of NO x ; 18% of organic aerosol (OA); and 6% of black carbon (BC) emissions from on-road motor vehicles in the United States.

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U Toronto study measures GDI emissions in urban near-road environment

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In four campaigns over the year-long study, the team from the University of Toronto measured emissions 15 meters from the roadway, then converted the measurements to fuel-based emission factors (EFs). Hence, GDI PM mass loadings and chemical composition may vary depending on the measurement environment or exhaust conditioning.