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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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Nevada launches “Clean Cars Nevada” effort; adopting California LEV and ZEV

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Through 2021, the Nevada Division of Environmental Protection (NDEP) will engage with stakeholders and convene public workshops to gather comprehensive input and feedback across all impacted sectors of our economy and throughout every community in Nevada.

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Monash study on solar-driven electrolysis for green hydrogen production cautions on life-cycle emissions and EROI

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Taking IRENA’s REmap scenario as a reference, renewable hydrogen could deliver 5% of total final energy demand in 2050. The materials and metals demanded by a low-carbon economy are projected to be immense and create challenges along the full supply pathway. According to the IEA, less than 0.1%

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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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Comparison of engine indicated efficiency with three different combustion approaches (PFI SI, ECDI SI and HPDI) for H2 with a diesel reference under full load operation. The models indicate NO x emissions can be managed with EGR and commercially available Urea-SCR NO x exhaust aftertreatment technology. Source: Westport/AVL.

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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.) The advent of stricter emissions regulations leads to a delay in combustion until after TDC (with a lower cylinder pressure and temperature), although this causes fuel economy to worsen. The name Mazda Connect is used in Japan, US, Canada and Mexico. Earlier post.).

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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. With D-EGR, one or more cylinders have their exhaust connected directly to the intake system.

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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.