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Study finds engines emit exhaust nanoparticles even when not fueled during engine braking

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Exhaust particle size distributions measured by ELPI (color map) and particle concentration measured by CPC (white line) during individual engine braking conditions (speed change from 32 km/h to 0 km/h). The exhaust sample was taken from the exhaust manifold. The exhaust sample was taken from the exhaust manifold.

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Westport Fuel Systems & AVL conclude high-efficiency H2 powertrain can outperform fuel cells in TCO for heavy-duty applications

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Hydrogen operation with the current WFS HPDI fuel system outperforms natural gas in terms of thermal efficiency, mainly due to lower equivalence ratio for H 2 at given fueling energy level, higher kinetic energy for H 2 jets as well as higher tolerance of H 2 combustion to fuel rich operation. Source: Westport/AVL.

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NSF and DOE form Partnership on Advanced Combustion Engines; goal 25-40% better LDV fuel economy and 55% BTE in heavy-duty engines; $12M in awards for FY 2012-2014

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The high-level performance goals of the Partnership are a 25-40% improvement in fuel economy in a light-duty vehicle (LDV) and achieving 55% brake thermal efficiency (BTE) in heavy-duty engine systems. bio-derived) fuels have the potential to dramatically increase fuel economy. The potential is significant.

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Mazda introduces HAZUMI concept along with new 1.5-liter SKYACTIV-D diesel

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The system is referred to as MZD Connect in other markets.) When fuel is injected under these conditions, ignition takes places before an adequate air-fuel mixture forms, causing localized heterogeneous combustion, resulting in the formation of NO x and soot, Mazda says. The elevated temperature stabilizes ignition.

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SwRI D-EGR gasoline demo vehicle delivers diesel efficiency at lower cost; potential for LEV III/Tier 3 emissions

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improvement in city fuel economy (24.5 Southwest Research Institute (SwRI) announced preliminary test results of its Dedicated-Exhaust Gas Recirculation (D-EGR) demonstration vehicle ( earlier post ) at the SAE 2014 World Congress in Detroit. Hydrogen-enriched exhaust is routed to the intake. mpg) and a 9.2% 2014-01-1190.

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Mazdas new SKYACTIV gasoline and diesel engines are steps on the road to its Ideal Engine; focus on compression ratio

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This corresponds to a 23% reduction in fuel consumption and, therefore, CO 2 output.). From a powertrain frame of reference, Mazda is planning a building block strategy—i.e., Raising the compression ratio in a gasoline engine increases its thermal efficiency, thus improving fuel economy. liter MZR gasoline engine.

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2015 VW Jetta to debut at New York Show; new EA288 diesel version already LEV3/Tier 3 compliant

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l/100 km); its combined fuel economy is projected to be around 37 mpg (6.36 Many components of the MDB engines are used in a modular way, such as the exhaust system components and the injection system, turbocharging systems, and forced induction cooling within the intake manifold module. Timing on US emission regulations.

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