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DieselNet: Diesel Engine Emissions Online

Engine & emission technology online—since 1997

The Log

13 October 2017: The October issue of Johnson Matthey Technology Review includes a number of topics related to emissions from transport—a summary of China 6 emission standards for light-duty vehicles, using methanol as transportation fuel, control of GDI emissions to meet Euro 6c standards, and an overview of gasoline vehicle aftertreatment technologies.

30 September 2017: Updated paper on Combustion Systems covers new Sandia research on stepped-lip combustion bowls, more information on the Volvo WAVE piston, and other updates. The material on Piston Cooling that used to be a part of this paper is now a stand-alone paper.

25 September 2017: Updated Technology Guide paper on Dimethyl Ether includes more information on standard specifications for fuel-grade DME and other updates.

22 September 2017: In an open letter, Andreas Mayer delivers a strong critique of a recent journal paper on the health effects of excessive NOx emissions from diesel cars [more ...].

9 September 2017: Updated paper on Variable Compression Ratio, with rewritten and expanded sections on the benefits of variable compression ratio in diesel and gasoline engines.

5 September 2017: A new Technology Guide paper describes Gasoline Particulate Filters.

29 August 2017: Emission standards: Updated summary of EU light-duty emission regulations includes more details on the transition to the new WLTP emission test and other changes.

24 August 2017: Updated paper on Diesel Fuel Injector Nozzles features an expanded section on injector sac, with a new video and figures.

12 August 2017: The Technology Guide discussion of diesel combustion has been updated and re-structured into two papers: Combustion in Diesel Engines and Diesel Spray Formation and Mixing. A new section on in-cylinder mixing enhancement was added in the latter paper.

8 August 2017: Updated Technology Guide paper on Soot (PM) Sensors, with revised sections on RF sensors and accumulating electrode soot sensors.

29 July 2017: Summary of the technical sessions from the 21st ETH Conference on Combustion Generated Nanoparticles [more ...].

26 July 2017: A major emission study led by the Paul Scherrer Institute (PSI) has found that modern gasoline cars emit much more carcinogenic particulate matter—including black carbon (BC) and primary organic aerosol (POA)—than modern diesel cars. The study results also show that gasoline cars emit more volatile organic compounds (VOC) that form far more toxic secondary organic aerosol (SOA) compared to modern diesels [more ...].

25 July 2017: Updated Technology Guide paper on Fuel Injection for Clean Diesel Engines, with an entirely rewritten and expanded section on the use of post injections for soot control.

24 July 2017: Linde Gases Division supplies specialty gases for emission testing, purity calibration gases and gas mixtures, and specialty equipment.

22 July 2017: Summary of the technical sessions from the 4th Conference on SENSORS for Exhaust Gas Aftertreatment and CO2 Reduction [more ...].

13 July 2017: Updated Business Directory Page of Rypos—a provider of electrically regenerated, active DPF technology.

27 June 2017: Summary of the US DOE 2017 Annual Merit Review and Peer Evaluation, held in Washington, DC, on June 5-9, 2017 [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.