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New mixed-oxide catalysts shown as viable substitute for platinum catalysts for diesel exhaust aftertreatment

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Under laboratory-simulated diesel exhaust conditions, this mixed-phase oxide material was superior to Pt in terms of cost, thermal durability, and catalytic activity for NO oxidation. Nanostellar was founded in California in 2004 by scientists from Stanford University and NASA Ames Research Center. Kyeongjae Cho.

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CRC ACES Phase 2 report finds emissions from modern heavy-duty diesels well below required levels

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2010 engines emissions reduction relative to 2010, 2007, and 2004 US emission standards. For a number of the most important pollutants, levels were substantially lower than required by regulations. These reductions came while emissions of fine particles were also 92% lower than the 2010 standard 99% lower than 2004 emissions.

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California ARB Seeks Further Reductions of Diesel Emissions at State Rail Yards

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Additional diesel PM reductions in 18 major CA railyards with five new locomotive measures. While we are pleased to have already reduced diesel emissions at the rail yards, it’s not enough. Source: Staff presentation. With Five Locomotive Measures Click to enlarge. Total cost of those five measures is estimated to be $3.9

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US EPA Proposes New Emissions Rules for Category 3 Marine Diesel Engines, Tighter Fuel Sulfur Restrictions; Harmonization with International Standards

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As the next steps in a strategy to cut harmful emissions from ocean-going vessels, the US Environmental Protection Agency is proposing new engine emissions and fuel standards for large marine diesel engines on US-flagged ships that would harmonize with international standards. Earlier post.)

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EPA Proposes to Streamline Approval Process for Fuel Conversion Systems

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Conversion systems allow vehicles to run on alternative fuels; most conversions involve switching gasoline or diesel vehicles to operate instead on a gaseous fuel such as natural gas or propane; an alcohol fuel; or electricity. Exhaust, Evap, and OBD testing 2. Exhaust and Evap testing + OBD attestation. Intermediate age.

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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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Achates: LD opposed-piston, 2-stroke diesel can meet 2025 final CAFE, Tier 3 standards for full-size pickup; 30% better FE than Cummins ATLAS

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Furthermore, the study shows the potential for a 30% improvement in fuel economy over the equivalent performance Cummins ATLAS Tier 2 Bin 2 engine ( earlier post ) as well as a significant improvement in NO x and PM (42-74%, depending upon drive cycle and pollutant). Diesel Engines Fuel Efficiency' Background. Lean combustion.

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