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Study finds high exhaust temperatures within NTE operation for heavy-duty diesels with aftertreatment systems contribute to high nanoparticle concentrations

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The transient results illustrate the gradual formation of the nucleation mode particles with continuous increase in exhaust temperatures. The particle number count under those conditions increased by more than an order of magnitude in comparison to DPF-out particle concentrations. Credit: ACS, Thiruvengadam et al. Click to enlarge.

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

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Based on a three-year study of toxic and environmentally relevant pollutants from gasoline direct injection (GDI) engines, Swiss researchers have concluded that some GDI engines emit just as many soot particles as unfiltered diesel cars did in the past. By contrast, diesel cars with particle filters exceeded the limit only 45-fold.

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LiquidPiston To Unveil Compact High Efficiency Engine at 2010 SAE World Congress

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In a paper to be presented at next week’s 2010 SAE World Congress in Detroit, LiquidPiston, Inc. The paper describes LiquidPiston’s third-generation engine prototype, which was first test-fired in January 2010. It provides an air-standard analysis of efficiency, including a comparison to conventional engine technologies.

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EEA report: EVs are better for climate and air quality

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Battery electric cars emit less greenhouse gases and air pollutants over their entire life cycle than petrol and diesel cars, according to a European Environment Agency (EEA) report. For local air quality, electric vehicles also offer clear benefits, mainly due to zero exhaust emissions at street level.

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Progress on ATLAS: Cummins’ Tier 2 Bin 2 light duty diesel project

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Cummins is one year into a four year program (ATLAS, Advanced Technology Light Automotive Systems) to develop, in partnership with the US Department of Energy (DOE), a new light-duty diesel truck engine that will meet Tier 2 Bin 2 (SULEV) emission requirements while achieving at least a 40% fuel economy improvement (26.1 mpg US vs. 18.6

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Toyota unveils new diesels with advanced thermal insulation combustion; 15% more fuel efficient, 25% more torque; 44% thermal efficiency

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liter 1GD-FTV direct-injection turbo diesel engine. The new GD engines feature Toyota’s next-generation advanced thermal insulation diesel combustion to reduce cooling loss significantly. Toyota will gradually phase out the current globally deployed KD diesel engines and replace them with GD engines. Click to enlarge.

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Independent testing finds Navistars IC Bus has up to 4.5% advantage in fluid economy over competitive buses: fuel plus urea

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advantage over competing buses in fluid economy—a measurement of diesel fuel plus liquid urea consumed by the vehicle’s emissions reduction system. Comparisons of type C buses have typically been centered on fuel economy. to conduct a head-to-head fluid economy comparison. —John McKinney, president, IC Bus.

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