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DieselNet: Diesel Engine Emissions Online

Engine & emission technology online—since 1997

The Log

10 December 2018: Updates and additions in the summary of Chinese emission standards for nonroad engines.

30 November 2018: Summary of the technical sessions from the ASME Internal Combustion Engine 2018 Fall Technical Conference held on November 4-7, 2017 in San Diego, California [more ...]

29 November 2018: Two updated and restructured Technology Guide papers discuss Engine Emission Control and Emission Control from In-Use Engines. The papers replace two earlier papers, titled Diesel Emission Control, and Engine Design for Low Emissions.

27 November 2018: Southwest Research Institute has updated their DieselNet presence: SwRI on DieselNet.

26 November 2018: General Motors announced a massive restructuring plan that involves closing seven manufacturing plants worldwide—including five plants in North America—discontinuing several slow-selling vehicle models, and a reduction of more than 14,000 jobs [more ...].

22 November 2018: Updated Technology Guide paper on Gas Phase Measurements. The updated material includes a video on NOx measurement under real driving conditions using a fast CLD analyzer.

14 November 2018: Updated summary of European emission standards for heavy-duty truck and bus engines, with more information on off-cycle emission testing, in-service conformity, and OBD.

13 November 2018: In its World Energy Outlook 2018, the International Energy Agency (IEA) predicts that global energy demand is set to grow by more than 25% to 2040, and warns of tightening oil market in the 2020s due to insufficient investment in conventional oil projects [more ...].

10 November 2018: VERT Association has announced the dates for two important emission control events in the upcoming year 2019:

  • VERT Forum—Thursday, 14 March 2019 at EMPA in Dübendorf, Switzerland. The VERT Forum is a technical knowledge transfer event dealing with emission control technology for internal combustion engines. This 10th Forum is organized again in cooperation of EMPA and the VERT Association and will be mainly devoted to SCRT retrofit solutions for HDV and LDV as they are available from VERT member companies.
  • 23rd ETH Conference on Combustion Generated Nanoparticles—Monday, 17 June to Thursday, 20 June 2019 at the Swiss Institute of Technology ETH in Zürich, Switzerland. The ETH-NPC started in 1997 as the first interdisciplinary conference on basic research, development, engineering and implementation of best available technology to minimize the health impact of nanoparticles emitted from engines and other combustion sources. The event’s goal is to reduce emissions from the entire worldwide ICE fleet, as has been successfully achieved with the Euro 6/VI particle filtration technology for diesel and petrol engines.

26 October 2018: Summary of the technical sessions from the SAE Heavy-Duty Diesel Emissions Control Symposium held on 16-17 October 2018 in Gothenburg, Sweden [more ...].

17 October 2018: Updated and restructured Technology Guide paper on Fossil Fuels and Future Mobility includes a number of edits and one new figure.

8 October 2018: The UN Intergovernmental Panel on Climate Change (IPCC) released a Special Report on Global Warming of 1.5°C. The report shows that a number of climate change impacts could be avoided by limiting global warming to 1.5°C, as opposed to 2°C or more. However, limiting global warming to 1.5°C would require “rapid and far-reaching” transitions in land, energy, industry, buildings, transport, and cities. Global net human-caused CO2 emissions would need to fall by about 45% from 2010 levels by 2030, reaching ‘net zero’ around 2050. To achieve these objectives, the average annual investment in the energy system alone is estimated at 2.4 trillion USD2010 between 2016 and 2035, representing 2.5% of the world GDP. But the reality is that at the current level of emission reduction commitments under the Paris agreement, the world is on course for a 3°C of warming, and the global carbon emissions from the energy sector are not being reduced—they continue to increase.

27 September 2018: The updated Technology Guide paper on Engine Fundamentals includes a new section on stroke-to-bore ratio, new discussion of brake thermal efficiency, an example of a commercial application of the Atkinson concept (the actual Atkinson concept of different geometric compression and expansion ratios, not the Miller cycle commonly confused with it), and a number of other updates. The paper includes three new figures and one new video.

25 September 2018: The global oil demand is forecasts to grow to reach 111.7 million barrels per day in 2040, according to the newest edition of the OPEC World Oil Outlook. Oil consumption growth is expected to be faster in the medium-term, driven in part by the IMO marine fuel quality regulations that become effective from 2020 [more ...].

24 September 2018: Updated and expanded Technology Guide paper on Scavenging in Two-Stroke Engines includes four new figures and one new video.

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.

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.