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DieselNet: Internal Combustion Engine & Emission Technology

Engine & emission technology online—since 1997

The Log

20 August 2019: Emission test cycles: Added summary of the Low Load Cycle (LLC) for heavy-duty engines and vehicles.

15 August 2019: Updated Technology Guide paper on Natural Gas, with expanded sections on natural gas utilization, greenhouse gas effects (methane emissions from NG engines and from the NG supply chain), and pollutant emissions from NG engines.

9 August 2019: Updated summary of Brazilian biodiesel standards, following the publication of the Brazilian B15 report and the increase of biodiesel mandate to 11%.

7 August 2019: Germany’s KBA approves first SCR retrofit kit for diesel cars, while Daimler agrees to subsidize retrofits of Mercedes vehicles [more ...]

2 August 2019: Updated summary of Chinese emission standards for marine engines includes a new section on fuel sulfur and NOx control requirements.

26 July 2019: The US EPA released its DERA Fourth Report to Congress: Highlights of the Diesel Emissions Reduction Program. The Diesel Emissions Reduction Act (DERA) program, authorized in 2005 and reauthorized in 2010, is a US federal government program addressing emissions from legacy diesel engines such as through engine replacements or retrofits. This Fourth Report to Congress summarizes final results from FY 2008-2013 and details a combination of final and estimated results from FY 2014-2016 (see also EPA news release).

23 July 2019: Updated Technology Guide paper on Diesel Particulate Filters—added new SEM images showing soot deposition in a DPF, and a number of edits throughout the text.

17 July 2019: Our updated summary of EU emission standards for heavy-duty engines covers dual fuel engines and includes other clarifications.

13 July 2019: A new Technology Guide paper discusses and compares the main categories of Natural Gas Engines.

11 July 2019: Hug Engineering updated their DieselNet Business Page with the current portfolio of emission control products.

10 July 2019: Summary of technical sessions from the 23rd ETH Conference on Combustion Generated Nanoparticles that was held on June 17-20, 2019 at ETH Zürich [more ...]

5 July 2019: A new report by the UK’s CREDS research consortium concludes that energy demand reduction is crucial to achieve a zero-carbon economy, and recommends that government energy policies should shift their focus from energy supply to energy demand reduction [more ...]

29 June 2019: Summary of the technical sessions from the 29th CIMAC World Congress that was held in Vancouver, Canada on June 10-14, 2019 [more ...]

27 June 2019: EU: Average CO2 emissions from new cars increase in 2018 for the second consecutive year, while emissions from vans increase for the first time ever [more ...]

15 June 2019: The summary of Brazilian emission standards for heavy-duty engines has been updated to cover the recently adopted PROCONVE P-8 regulation.

12 June 2019: Although the US Defense Department has reduced its fossil fuel consumption since the early 2000s, it remains the world’s single largest consumer of oil—and as a result, one of the world’s top greenhouse gas emitters. A new paper by Neta C. Crawford of Boston University, titled Pentagon Fuel Use, Climate Change, and the Costs of War (see also Life Science summary), specifically examines military fuel usage for the US post-9/11 wars and the impact of that fuel usage on GHG emissions. The best estimate of US military GHG emissions from 2001, when the wars began with the US invasion of Afghanistan, through 2017, is that the US military has emitted 1,212 million tonnes of CO2e. In 2017, for example, the Pentagon’s GHG emissions were greater than the GHG emissions of entire industrialized countries such as Sweden or Denmark.

11 June 2019: BP has released its annual Statistical Review of World Energy, showing that the global economic growth experienced in 2018 was fueled by a strong increase in energy consumption, and produced a corresponding increase of CO2 emissions [more ...]

5 June 2019: Mazda announced it is accepting orders in the European market for the new Mazda3 Skyactiv-X featuring the spark plug controlled compression ignition (SPCCI) technology [more ...]

30 May 2019: The May issue of DieselNet Update is now available for your reading pleasure (subscription required).

27 May 2019: Summary of technical sessions at the 40th International Vienna Motor Symposium held on May 15-17, 2019 in Vienna, Austria [more ...]

25 May 2019: Emission standards—added summary of Norwegian Marine Regulations.

23 May 2019: Added summary of EU Occupational Health Regulations, which now include an exposure limit value for diesel engine exhaust emissions.

21 May 2019: The summary of EU CO2 emission standards for light-duty vehicles has been updated to cover the 2025/2030 regulation published last month.

17 May 2019: Updated Technology Guide paper on Gasoline Particulate Filters, with more information on filter regeneration, pressure drop effects, and configuration of GPF systems.

16 May 2019: Updated Business Directory Page of Exothermia—the creator of simulation software for exhaust aftertreatment, engines, and powertrains.

15 May 2019: Diesel-Electric Locomotives—a new book provides a wealth of information on contemporary diesel-electric locomotives, their sub-systems and components, and the energy and environmental aspects of diesel-electric railroads. The richly illustrated book has been authored by Walter Simpson and published by Simmons-Boardman Books.

13 May 2019: The World Energy Investment 2019 report by the International Energy Agency (IEA) signals a growing mismatch between current energy investment and the global energy supply needs [more ...]

10 May 2019: Updated Technology Guide paper on Methane Oxidation Catalysts.

30 April 2019: Summary of the technical sessions on engine and emission technology at the SAE WCX 2019 conference held April 9-11, 2019 in Detroit, Michigan [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. 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 have been evolving to meet two major challenges: lower emissions and increased energy efficiency.

Internal combustion engines are significant contributors to air pollution. 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. 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 internal combustion engines and emissions, is an internet knowledge base for technical and business information on diesel engines, fuels, emissions and technologies required by the clean and efficient diesel engines of the future.