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DieselNet: Diesel Engine Emissions Online

Engine & emission technology online—since 1997

The Log

17 February 2017: Fuel regulations: Updated summary of Mexican diesel fuel standards includes the current NOM-016 specification.

2 February 2017: Emission standards: Added summary of Canadian emission standards for stationary spark-ignition engines under the Multi-Sector Air Pollutant Regulations (MSAPR).

1 February 2017: Volkswagen reaches agreements with private plaintiffs and the US Federal Trade Commission to settle 3.0 L diesel vehicle claims in the United States [more ...], while Robert Bosch agrees to pay $327.5 million to settle civil claims in relation to its role in the development of the cycle beating VW software strategy [more ...].

27 January 2017: The European Commission has published a Guidance on the evaluation of Auxiliary Emission Strategies and the presence of Defeat Devices. The document is intended to assist member states in the implementation of Regulation (EC) 715/2007, but by itself is not legally binding.

25 January 2017: Updated summary page of Canadian emission standards.

24 January 2017: New Technology Guide paper Miller Cycle Engines discusses over-expanded engine cycles, often referred to as Miller or Atkinson cycles. The paper covers the definitions, theoretical principles, early and late intake valve closing strategies, as well as diesel and gasoline engine applications—the latter including naturally aspirated engines, boosted engines and high BMEP gasoline engines. Happy Reading!

11 January 2017: Volkswagen pleads guilty to US criminal charges, agrees to pay $4.3 billion in criminal and civil penalties. In addition, six VW executives are indicted with conspiracy to cheat US emission tests [more ...]

23 December 2016: The US EPA intends to initiate the rulemaking process to develop low-NOx emission standards for heavy-duty on-road engines. The new standards would become effective in model year 2024 [more ...]

19 December 2016: Updated summary of US GHG and fuel economy standards for heavy-duty trucks reflects the provisions of the Phase 2 rule.

7 December 2016: SGS Transportation provides testing and consulting services in the areas of engine, vehicle and component testing, test cell design, and transportation analytics.

6 December 2016: Updated Technology Guide paper on PM Measurement: In-Situ Methods—the paper has been restructured and expanded. Most of the new material landed in the sections on diffusion charging sensors and on instruments for field measurements of particle aerosols. A number of edits have been introduced throughout the text to account for new research and new instruments. Happy reading!

22 November 2016: Updated Technology Guide paper on Combustion Systems includes new sections on piston cooling and on the Volvo WAVE bowl, as well as a number of other updates and edits.

21 November 2016: Added summary of Chinese emission standards for marine engines, including China I/II standards and Domestic Emission Control Areas (DECA) requirements.

19 November 2016: Updated Technology Guide paper on Methane Oxidation Catalysts.

16 November 2016: Global oil demand will continue to grow until 2040, mostly because of the lack of easy alternatives to oil in road freight, aviation and petrochemicals, according to the World Energy Outlook 2016 report by the International Energy Agency. However, oil demand from passenger cars is predicted to decline, even as the number of vehicles will double in the next quarter century, thanks mainly to improvements in efficiency, but also biofuels and rising ownership of electric cars.

12 November 2016: Updated summaries of EU emission standards for nonroad engines and for nonroad SI engines reflect the provisions of the final Stage V legislation.

10 November 2016: Infineum published the 2016 edition of their Winter Diesel Fuel Quality Survey. Based on an analysis of fuel samples from 50 countries, the survey reveals key trends in diesel fuel quality around the world, such as the changing use of renewable fuels, sulfur levels and lubricity performance.

2 November 2016: The California Air Resources Board has posted presentations for tomorrow’s workshop that will discuss proposals to revise the heavy-duty engine NOx standards (including a new low-load certification cycle), the Not-to-Exceed in-use compliance program, as well as changes to useful life, durability and warranty periods requirements.

31 October 2016: Summary of the technical sessions from the ASME ICE 2016 Fall Technical Conference [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.