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DieselNet: Internal Combustion Engine & Emission Technology

Engine & emission technology online—since 1997

The Log

14 October 2020: Bankruptcies in the US oil & gas industry have hit a new milestone—the amount of secured and unsecured debts, such as loans and bonds, listed in bankruptcy filings in Q1-Q3 2020 has reached $89 billion, according to data by law firm Haynes and Boone, analyzed and reported by Wolf Richter. This nine-month total already surpassed the full-year total during the record oil-bust year of 2016. The total number of oil & gas bankruptcies so far this year, at 88 filings, remains a lot lower than the 141 filings in 2016. Back then, scores of small companies were shaken out. Now the bigger ones with multi-billion-dollar debts are letting go as the crisis is working up the ladder. The cumulative amount of secured and unsecured debts that the 490 US oil & gas companies disclosed in their bankruptcy filings from January 2015 through September 2020 has now jumped to nearly $300 billion.

13 October 2020: Our summary of China’s emission standards for nonroad engines has been updated with the recently proposed delay of China Stage IV standards and other clarifications.

9 October 2020: The 2020 ASME Internal Combustion Engine Fall Technical Conference (ICEF) will be held on November 4-6, 2020 as a virtual event. The registrations are now open! [more ...]

29 September 2020: The 11th edition of the THIESEL Conference on Thermo-and Fluid Dynamic Processes in Direct Injection Engines organized by the Universitat Politècnica de València was held September 8-11th 2020 as a virtual event. Sessions covered alternative fuels, new combustion concepts, injection and combustion, CO2 reduction and emission abatement [more ...]

24 September 2020: California governor Gavin Newsom issued an executive order that requires 100% of in-state sales of new passenger cars and trucks be zero-emission by 2035 [more ...]

23 September 2020: The 2020 CLEERS Workshop organized by the US DOE was held last week as a virtual event. The workshop covered all types of automotive emission control catalysts, with focus on low-temperature catalyst activity, particle filters, SCR, and passive NOx adsorbers [more ...]

16 September 2020: Weichai has officially launched the first commercial, heavy-duty high-speed diesel engine in the world to have a brake thermal efficiency above 50% [more ...]

14 September 2020: BP released the 2020 edition of its Energy Outlook, which projects that peak oil may be very close, or already happened in 2019 [more ...]

8 September 2020: Air and noise pollution, the impacts of climate change such as heatwaves, and exposure to dangerous chemicals contribute to 13%—one in every eight—of deaths in Europe, according to a major assessment on health and environment released today by the European Environment Agency [more ...]

7 September 2020: Updated Technology Guide paper Fuel Injection for Clean Diesel Engines, with more examples on the use of fuel injection parameters for the purpose of exhaust gas thermal management.

29 August 2020: A new Technology Guide paper, Exhaust Gas Thermal Management, covers thermal management measures that can be used to ensure adequate activity of emission aftertreatment systems at cold start and low load conditions.

28 August 2020: California adopts Heavy-Duty Low NOx Omnibus Regulation that will require further ~90% NOx emission reduction from heavy-duty onroad engines, with a focus on real-world emission reductions and durability [more ...]

11 August 2020: The US DOE Annual Merit Review (AMR) held virtually in June included a number of presentations reflecting trends in future aftertreatment technologies [more ...]

29 July 2020: Updated Technology Guide paper on Natural Gas Engines includes more examples on mixture preparation in gas engines.

27 July 2020: New Technology Guide paper talks about Cylinder Deactivation for Diesel Engines, a prospective technology to manage aftertreatment temperature in diesel engines.

13 July 2020: SuperTruck II update, based on the 2020 US DOE Annual Merit Review held virtually on June 1-4 [more ...]

7 July 2020: Emission standards—added summary of Korean programs to reduce fine dust emissions from ships.

29 June 2020: For your reading pleasure, a summary of the engine and emission sessions from the SAE WCX 2020 Digital Summit that was held virtually on June 16-18 [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. 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 have been evolving to meet two major challenges: lower emissions and increased energy efficiency.

Internal combustion engines are significant contributors to air pollution. 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. 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 internal combustion engines and emissions, is an internet knowledge base for technical and business information on diesel engines, fuels, emissions and technologies required by the clean and efficient diesel engines of the future.