Log in | Subscribe | RSS feed | FAQ

DieselNet: Diesel Engine Emissions Online

Engine & emission technology online—since 1997

The Log

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 The US EPA has withdrawn its prior determination that the federal GHG emission and fuel economy standards for model years 2022-2025 are appropriate, and determined those standards may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 ...].

26 March 2018: A new Technology Guide paper discusses Turbocompounding—a waste heat recovery technology where a power turbine is used to extract additional energy from engine exhaust.

22 March 2018: Global energy demand rose by 2.1% in 2017, more than twice the previous year’s rate, while carbon dioxide emissions rose for the first time since 2014, reaching a new high of 32.5 gigatonnes—according to a new report from the International Energy Agency [more ...].

15 March 2018: Most narratives and policies about electric vehicles assume that the future electric mobility would be powered by renewable electricity—an assumption that seems detached from reality. According to a new MIT Technology Review post, we are adding globally around 151 MW of carbon-free electricity per day, while about 1,100 MW of renewable energy per day would be likely needed over the next three decades to prevent temperatures from rising more than 2°C. At the current rate, substantially transforming the energy system would take not the next three decades, but nearly the next four centuries. And these calculations do not even account for the added electricity demand that would result from the increased use of electric vehicles.

6 March 2018: Landson Emission Technologies—a new manufacturer of silicon carbide (SiC) diesel particulate filters.

3 March 2018: Mexico is aligning its emission standards for heavy-duty engines with US 2010 and Euro VI regulations effective from 2021. More details are available in the updated summary of Mexican emission standards.

28 February 2018: New Technology Guide paper discusses Rankine cycle waste heat recovery and its application to internal combustion engines.

20 February 2018: BP releases Energy Outlook 2018, expecting that global energy demand will increase by about a third by 2040 [more ...].

9 February 2018: The IMO has agreed to move forward with a prohibition on the carriage of fuel oil for use on board ships, when that fuel oil is not compliant with a new low sulfur limit which comes into force from 2020 [more ...].

7 February 2018: Shale Reality Check, a report by David Hughes assesses the viability of the US EIA projections of the future shale oil and gas production and concludes that the official figures are overly optimistic. According the the report, the EIA mischaracterizes the source of recent productivity improvements (by assuming it’s mostly technology, not high-grading); extrapolates recent well productivity improvements far into the future, even though evidence suggests this is unwise; assumes that large areas that are not currently being drilled will be highly productive; and ignores price and profitability. The report is also available via Shalebubble.org, and a summary can be found on EcoWatch.

6 February 2018: Volkswagen-funded scientific research using animals and humans triggers undeserved backlash and condemnation [more ...].

30 January 2018: We have introduced a number of updates to the Technology Guide material on urea dosing and control in SCR systems. The former sections on NOx and ammonia sensors are now a stand-alone paper. These are the updated papers:

20 January 2018: Updated summary of Russian emission standards.

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.