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NREL announces $18M investment in 9 new projects to advance medium- and heavy-duty natural gas vehicle technologies

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will address natural gas engine emissions and efficiency improvements by developing a natural gas specific combustion design utilizing optimized in-cylinder charge motion and cooled exhaust gas recirculation (EGR). g/bhp-hr NO x capability with reduced aftertreatment cost; and demonstrating a diesel-like torque curve. Cummins Inc.

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New GM/Tula DSF cylinder deactivation technology could boost fuel efficiency in engines by up to 15%

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With intake or exhaust (or both) valve deactivation in place, inactive cylinders are prevented from pumping air through the engine, which enables effective use of three-way catalyst technology. Since its founding in mid-2010, GM Ventures’ international portfolio includes investments in more than 20 startup companies. Wilcutts, M.,

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European, Japanese and American Heavy-Duty Vehicle and Engine Manufacturers Call for Global Policy Cooperation to Improve Energy Efficiency and Emissions of Road Freight Transport

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Furthermore, and in relation to exhaust emission requirements, the manufacturers agreed to recommend the introduction of legislative requirements regarding market fuels, in order to ensure that the appropriate, high-quality fossil and renewable fuels are globally available for today’s vehicle technologies.

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Comparative study finds that B20 increases emission rates of a number of pollutants in both light- and medium-duty diesel engines at idle

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L) diesel engines at idle and load, using a biodiesel blend (B20) and conventional ultralow sulfur diesel (ULSD) fuel. They found that the level of emissions of regulated and unregulated pollutants in diesel exhaust depends on fuel, load, engine calibration, and exhaust aftertreatment technology.

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U Mich study explores performance of renewable diesel, FT diesel and ULSD in PCCI combustion

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A team at the University of Michigan has investigated the performance of three different fuels—ultralow sulfur diesel (ULSD), diesel fuel produced via a low temperature Fischer–Tropsch process (LTFT), and a renewable diesel (RD), which is a hydrotreated camelina oil under partially premixed compression ignition (PCCI) combustion.

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LiquidPiston introduces latest X-series version of HEHC rotary engine; targeting 58% peak BTE, 2 hp/lb power density

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Isuzu D201 35 hp diesel engine (left) and the LiquidPiston 40 hp X2 Prototype (right). Other features of the X2 include: Quiet operation: engine lacks poppet valves and over-expansion minimizes exhaust noise. Internal cooling with air or water (Rankine). Click to enlarge. LiquidPiston, Inc.

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