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DieselNet: Diesel Engine Emissions Online

Engine & emission technology online—since 1997

The Log

4 September 2018: Updated summary of China’s emission standards for onroad heavy-duty engines and for nonroad engines.

3 September 2018: Updated and expanded Technology Guide paper on Exhaust Particulate Matter discusses particle emissions from diesel and gasoline engines.

27 August 2018: Fossil Fuels and Future Mobility, a new, top-level Technology Guide paper reviews some important concepts relevant to the energy supply of the world’s economy and the transition of the energy system away from fossil fuels.

25 August 2018: John Deere on DieselNet—updated page on John Deere engines and powertrains.

24 August 2018: Updated summary of China’s emission standards for marine engines and diesel and gasoline fuel regulations.

21 August 2018: US EPA proposed to reverse the Obama-era Clean Power Plan (CPP) that imposed GHG emission reduction requirements on coal-fired power plants. The EPA is instead proposing a new rule, entitled the Affordable Clean Energy (ACE) Rule, which delegates any regulation of GHG emissions from the coal industry to the states. While states would be empowered to regulate GHG emissions, they would not be under a mandate to do so. The proposal is intended to counteract the decline of the US coal industry and to facilitate economic growth—the EPA projects the ACE Rule would reduce the coal industry compliance burden by up to $400 million per year when compared to CPP. The emission impact of the proposed rule appears marginal—the EPA estimates that the ACE Rule could reduce 2030 CO2 emissions by up to 1.5% from projected levels without the CPP. The CPP, adopted in 2015, was designed to reduce carbon pollution from the power sector by 32% below 2005 levels by 2030.

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.

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.