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DieselNet: Diesel Engine Emissions Online

Engine & emission technology online—since 1997

The Log

19 October 2016: Emission standards: Updated summary of US NTE (not-to-exceed) testing requirements—added definitions of NTE temperature exclusions.

30 September 2016: Summary of the technical sessions from the SAE Heavy-Duty Emissions Control Symposium that was held September 20-21 in Gothenburg, Sweden [more ...]

21 September 2016: New Technology Guide paper covers Methane Oxidation Catalysts.

16 September 2016: Real-World Emissions Technology Summit: Join West Virginia University’s Center for Alternative Fuels, Engines and Emissions as well as industry, academic and regulatory leaders for a day of engagement focused on emerging emission technologies. View the Summit program and register.

15 September 2016: Updated Technology Guide paper on Exhaust Gas Sampling and Conditioning—added material on methods of volatile particle removal such as the catalytic stripper.

31 August 2016: Updated and expanded Technology Guide papers covering various aspects of turbocharging technology.

15 August 2016: Nissan announced a production-ready variable compression ratio gasoline engine that has been designed to match the performance and fuel economy of diesel and hybrid powertrains [more ...]

2 August 2016: California state agencies released the final Sustainable Freight Action Plan, a blueprint document for transforming the state’s freight transport system into one that is environmentally cleaner, more efficient, and more economically competitive. The final document is similar to the draft version issued in May 2016, but reflects new input received during the public comment period.

24 July 2016: Updated summary of Chinese emission standards for light-duty vehicles and for heavy-duty engines.

23 July 2016: Updated Technology Guide paper on Combustion Systems—added more discussion on stepped-lip combustion bowls, illustrated by the new Mercedes OM 651 engine.

22 July 2016: Updated summary of Argentinian diesel fuel regulations.

19 July 2016: The US EPA, NHTSA and the California ARB released a draft Technical Assessment Report (TAR) that examines the 2022-2025 GHG and fuel economy standards for light-duty vehicles [more ...]

14 July 2016: Summary of technical sessions from the International Specialist Conference: SENSORS for Exhaust Gas Cleaning and CO2 Reduction that was held in Leipzig, Germany on June 28-30, 2016 [more ...]

Diesel Engine & Emissions

The diesel engine is the most efficient power plant among all known types of internal combustion engines. Heavy trucks, urban buses, and industrial equipment are powered almost exclusively by diesel engines all over the world and diesel powered passenger cars are increasingly popular. For the foreseeable future, the world’s transportation needs will continue to rely on the diesel engine and its gasoline counterpart. However, both engine technologies are evolving at an ever increasing pace to meet two major challenges: lower emissions and increased energy efficiency.

Internal combustion engines are significant contributors to air pollution that can be harmful to human health and the environment. In response, clean diesel technologies with near-zero emissions of NOx and PM have been developed and introduced in regions with the most stringent emission standards: North America, Europe and Japan. While new clean diesel engines are gradually replacing the population of older diesel engines in these regions, older engines already in service are being retrofitted with clean diesel technologies to hasten emissions reductions. As this trend spreads to other parts of the world, the environmental focus has shifted to climate changing emissions and energy efficiency. The environmental benefit of low greenhouse gas emissions, traditionally associated with the diesel engine, is no longer sufficient. To meet future greenhouse gas and fuel economy regulations, new technologies are being developed—low temperature combustion, waste heat recovery, powertrain electrification, to name a few—that further increase the efficiency not only of the diesel engine powertrain but the entire vehicle as well. Under low-carbon regulatory policies, the scope for potential improvements is no longer limited to engines and vehicles, but also includes life cycle effects of fuel production and vehicle manufacture.

DieselNet, the only information service exclusively devoted to diesel engines and emissions, is an internet forum for the exchange of technical and business information on diesel engines, fuels, emissions and many of the important technologies required by the clean and efficient diesel engines of the future.