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DieselNet: Diesel Engine Emissions Online

Engine & emission technology online—since 1997

The Log

9 August 2018: Updated Technology Guide paper on Engine Intake Charge Management provides a more comprehensive coverage of the topic and discusses both diesel and spark-ignited engines.

2 August 2018: The US EPA and NHTSA released a notice of proposed rulemaking to relax the existing GHG emission and CAFE fuel economy standards by freezing them at the 2020 levels. The EPA would also withdraw the California waiver for their LEV III & GHG emission regulations, to prevent the state from enforcing their own, more stringent standards [more ...].

31 July 2018: Cummins to recall 500,000+ heavy-duty truck engines in the United States over SCR catalysts [more ...].

25 July 2018: Summary of the technical sessions from the 5th Conference on Emission Reduction and Emission Sensors, held in Stuttgart, Germany on July 10-12, 2018 [more ...].

20 July 2018: The D.C. Circuit Court issued a temporary stay of the EPA’s decision to stop enforcing production caps on glider trucks after the Center for Biological Diversity, Environmental Defense Fund and Sierra Club filed an emergency motion.

17 July 2018: Global energy investment in 2017 failed to keep up with energy security and sustainability goals, raising concerns about the long-term adequacy of world’s energy supply, according to the World Energy Investment 2018 report released by the IEA [more ...].

9 July 2018: The ETH Conference on Combustion Generated Nanoparticles has posted a video about the 2018 Nanoparticles Conference, including the conference history and several interesting interviews.

5 July 2018: Updated Technology Guide paper on Waste Heat Recovery includes a new section on thermoacoustic converters and 5 new figures.

30 June 2018: Summary of the 22nd ETH Conference on Combustion Generated Nanoparticles, held on June 18-21, 2018 in Zürich, Switzerland [more ...].

28 June 2018: Summary of the 6th International Exhaust Emissions Symposium (IEES) by the BOSMAL Automotive Research & Development Institute, held on June 14-15, 2018 in Bielsko-Biała, Poland [more ...].

24 June 2018: Updated and expanded Technology Guide paper on NOx Sensors includes detailed discussion of the design and operation of amperometric NOx sensors based on YSZ ceramics, as well as new NOx sensor concepts under development. The updated paper includes 15 new figures.

14 June 2018: The European Parliament and EU member states have agreed on the Renewable Energy Directive and reached a compromise on a 32% renewable energy target by 2030, as well as a phase-out plan for palm oil use in transport [more ...].

31 May 2018: New Technology Guide paper discusses Waste Heat Recovery in internal combustion engines.

22 May 2018: The UK government opened a public consultation on a draft Clean Air Strategy 2018 that aims, by 2025, to halve the number of people living in locations where concentrations of PM2.5 are above the WHO guideline limit of 10 µg/m3. In the transportation sector, by 2040, the strategy would end the sale of new “conventional” diesel and gasoline cars and vans and phase-out diesel-only trains. The plan has been criticized by environmental groups and opposition politicians as inadequate and not supported by sufficient funding.

17 May 2018: The Association for Emissions Control by Catalyst (AECC) set up the Diesel Information Hub—a website contributing to the public discourse on the future of mobility and urban air quality by providing information on the modern diesel engine, aimed for the public at large. More content will be added to the website in the coming months.

7 May 2018: The California Air Resources Board (CARB) GHG standards allow manufacturers the option to comply by meeting the US Environmental Protection Agency (US EPA) GHG standards through model year 2025—referred to as the “deemed to comply” provision. The US EPA has withdrawn its prior determination that the federal GHG emission and fuel economy standards for model years 2022-2025 are appropriate, and determined those standards may be too stringent. CARB disagrees and may consider amending their LEV III GHG regulations to clarify the deemed to comply provision applies to the current federal GHG standards, should US EPA change the federal standards. CARB is soliciting public input on potential alternatives to this amendment.

2 May 2018: New data from the World Health Organization (WHO) shows that 90% of people in the world live in areas where particle pollution exceeds the WHO air quality guidelines [more ...]. In another report, the International Energy Agency (IEA) concludes that the world is not on track to meet the global energy targets set as part of the UN 2030 “Sustainable Development Goals” (SDG). In particular, the share of renewables in the world’s energy consumption is falling short of the substantial increase demanded by the SDG targets [more ...].

30 April 2018: Summary of the technical sessions on engine and emission technologies from the 2018 SAE Congress [more ...].

24 April 2018: Updated Technology Guide paper on DOC Applications (formerly titled Commercial DOC Technologies).

17 April 2018: 95 percent of the world’s population lives in areas exceeding WHO Guideline for the annual average PM2.5 concentration of 10 μg/m3, while 58 percent of the global population resides in areas with PM2.5 concentrations above the WHO Interim Target 1 of 35 μg/m3, according to the State of Global Air 2018 report by the HEI. The highest PM2.5 concentrations were in North Africa and the Middle East, due mainly to windblown mineral dust and solid fuel burning in the households. The next-highest concentrations appeared in South Asia, where the main contributors included household solid fuel use, coal-fired power plants, agricultural and other open burning, industrial sources and transportation. The PM2.5 contribution from transportation and the related disease burden varies between countries—it is significant in China, but relatively low in India.

9 April 2018: Updated summary of Indian emission standards for nonroad diesel engines reflects the final Bharat Stage (CEV/Trem) IV/V regulations adopted by Indian Government last month.

30 March 2018: Summary of technical sessions from the SAE On-Board Diagnostics Symposium-Europe held on 5-7 March 2018 in Barcelona, Spain [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.