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DieselNet: Diesel Engine Emissions Online

Engine & emission technology online—since 1997

The Log

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 ...]

8 July 2016: EU Parliament has adopted a regulatory text that will likely be the final version of Stage V emission standards for nonroad mobile machinery engines [more ...]

28 June 2016: Summary of technical sessions from the 2016 CIMAC Congress held on June 6-9, 2016 in Helsinki, Finland [more ...]

In two related settlements, one with the United States and the State of California, and one with the U.S. Federal Trade Commission (FTC), Volkswagen has agreed to spend up to $14.7 billion to settle allegations of cheating emissions tests and deceiving customers [more ...]

24 June 2016: The 20th ETH Conference on Combustion Generated Nanoparticles was held on June 13-16, 2016 in Zürich. We are pleased to provide a summary of the technical sessions for your reading pleasure [more ...]

15 June 2016: Updated Technology Guide paper on EGR Control Strategy includes an expanded section on oxygen fraction based EGR control, a new section on dual loop EGR systems, and other updates.

31 May 2016: Summary of technical sessions from the 5th BOSMAL Emissions Symposium held on May 19-20, 2016 in Bielsko-Biała, Poland [more ...]

25 May 2016: We’ve added a new Technology Guide paper on Exhaust Gas Temperature Sensors.

18 May 2016: Updated Technology Guide paper on Diesel Catalysts—a top level overview of diesel emission control catalyst technologies.

16 May 2016: The 5th International Exhaust Emissions Symposium will open on Thursday, May 19th at Bosmal in Bielsko-Biala, Poland.

13 May 2016: A summary of technical sessions at the 37th Vienna Motor Symposium held on April 28-29 in Vienna, Austria [more ...]

12 May 2016: More than 80% of people living in urban areas that monitor air pollution are exposed to air quality levels that exceed the World Health Organization (WHO) limits, according to the 2016 update of the WHO Global Urban Ambient Air Pollution Database. According to the WHO data, 98% of cities in low- and middle-income countries with more than 100,000 inhabitants do not meet WHO air quality guidelines. However, in high-income countries, that percentage decreases to 56%.

29 April 2016: A summary of technical sessions on engine and vehicle emissions at the SAE Congress held on April 12-14 in Detroit [more ...]

26 April 2016: Updated Technology Guide paper on NOx Adsorbers includes more information on passive NOx adsorber (PNA) technology.

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.