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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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Alternative Fuel Technologies Awarded Phase 1 US Army Contract for Ultra-high Pressure Injection System for JP8

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Alternative Fuel Technology, LLC has been awarded a Phase 1 SBIR contract (W56HZV-10-C-0200) from the US Army to concept design and demonstrate an ultra-high pressure, intensified fuel injection system for use with jet propellant (JP-8) fuel. With most fuel injection systems, JP-8 fuel causes wear and premature failure.

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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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The basic concept of Dynamic Skip Fire technology is to manage torque production in response to the driver command via selectively engaging or disengaging torque production from engine cylinders rather than by throttling. Wide authority over generation of vibrational and acoustic excitations. Wilcutts, M., Switkes, J., and Tripathi, A.

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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. HEHC thermodynamic advantages relative to the diesel and the Otto cycles. Click to enlarge. LiquidPiston, Inc.

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