Log in | Subscribe | RSS feed | FAQ

DieselNet: Internal Combustion Engine & Emission Technology

Engine & emission technology online—since 1997

The Log

26 January 2022: The CIMAC World Congress that was planned for June 2022 has been postponed by one year due the the ongoing travel restrictions imposed by governments and companies. The Congress is now planned for 12-16 June 2023, with Busan remaining the chosen location.

22 January 2022: The Getting to Zero Coalition has released a new report, which proposes policy measures to enable decarbonization of global shipping. To make future ‘green’ fuels cost-competitive with conventional marine fuels, the report calls for a carbon price of about $200 per tonne of CO2 [more ...]

20 January 2022: Emission standards: Updated summary of California emission programs for in-use diesel engines.

15 January 2022: The amount of electricity generated worldwide from coal reached a new annual record in 2021, undermining efforts to reduce GHG emissions and potentially putting global coal demand on course for an all-time high next year, according to IEA’s Coal 2021 report [more ...]

13 January 2022: Trunett Environmental—now on DieselNet—is a China based manufacturer of emission control catalysts and systems for heavy-duty and stationary diesel engines. Trunett’s product offering includes diesel oxidation catalysts, catalyzed diesel particulate filters and SCR catalysts for OEM, retrofit and aftermarket applications.

5 January 2022: The summary of US GHG emissions & fuel economy standards for light-duty vehicles has been updated to reflect the most recent revisions to the regulation.

3 January 2022: Two newly published books related to engine technology: Engines and Fuels for Future Transport (Editors: G. Kalghatgi, A.K. Agarwal, F. Leach, K. Senecal); and Handbook of Thermal Management of Engines (Editors: P.A. Lakshminarayanan, A.K. Agarwal).

23 December 2021: Powertrain Alternatives, a completely rewritten top level Technology Guide paper discusses internal combustion engines, the potential low carbon alternatives such as electric vehicles, and their environmental impacts.

21 December 2021: A new Technology Guide paper, Alternative Combustion Engines, provides an overview of alternative engine concepts that can offer improved efficiency, power density, and other potential advantages. The paper covers rotary engines, two-stroke engines, six-stroke engines, split-cycle engines, gas turbines, and the Stirling engine.

20 December 2021: The US Environmental Protection Agency released a final rule that strengthens GHG emission standards for model years 2021-2026 passenger cars and light trucks [more ...]

8 December 2021: In a study published last month in Nature Energy, researchers from the US Berkeley Lab make a rather optimistic case that diesel-electric trains in the United States could be retrofitted with batteries in a way that is cost-competitive with diesel [more ...]

1 December 2021: BloombergNEF has published their 2021 battery price survey, which shows that the volume-weighted average battery prices for electric vehicles fell to $132 per kWh in 2021—down by 6% from $140/kWh in 2020. The newest pricing trends are now reflected in our updated Technology Guide paper on Batteries.

17 November 2021: Emission standards: Added summary of the Low Load Application Cycle (LLAC) that is considered for low load testing of Tier 5 nonroad engines.

6 November 2021: The California Air Resources Board held the first public workshop on the development of Tier 5 emission standards that will seek to further reduce NOx and PM emissions from off-road engines by 50-90%—depending on the engine power category—in the 2028-2030 timeframe [more ...]

31 October 2021: New Technology Guide paper, Electric Vehicles, discusses light- and heavy-duty vehicle technologies, such as battery electric vehicles, that are powered by grid electricity.

29 October 2021: Summary of the technical sessions at the 2021 ASME Internal Combustion Engine Fall Technical Conference (ICEF) that was held as a virtual event on October 13-15, 2021 [more ...]

22 October 2021: The effects of China’s coal and electricity shortage are now spreading through the global economy. In an effort to curb domestic power consumption, the production of magnesium in China has either been halted or reduced drastically since September 2021, resulting in an international supply crisis. Magnesium is a key alloying material used in the production of aluminum, steel, and other metals widely used in the automotive industry [more ...]

19 October 2021: Introducing NANO—a Korea based provider of SCR catalysts, TiO2 raw material and related services: SCR catalyst design, testing, evaluation, maintenance, and regeneration.

Engines & Emissions

The internal combustion engine (ICE) has been a key prime mover that largely replaced earlier prime movers of lesser efficiency—human labor, animal work, the water wheel, the windmill, and the steam engine—thus enabling modern industrial civilization. The most efficient type of ICE, the diesel engine, has been widely used in heavy trucks, construction and agricultural machinery, rail locomotives, ships, and emergency power generation. Its gasoline counterpart has been common in passenger cars. Another related power plant, the gas turbine, has been powering commercial aviation.

For many years, engine developers have been striving to make engines cleaner. Following the three-way catalyst for gasoline engines, clean diesel technologies that enabled near-zero emissions of PM and NOx were developed and introduced in many regions of the world. The focus in technology development has then shifted to climate change and energy efficiency. The benefit of low CO2 emissions, traditionally associated with the diesel engine, is no longer sufficient to meet GHG and fuel economy regulations. New technologies are being developed—such as new combustion techniques, powertrain electrification, and waste heat recovery—that further increase the efficiency not only of the engine itself, but of the entire vehicle. Critically, as GHG emissions occur at all stages of vehicle life, from manufacture through disposal, low-carbon policies must consider life cycle effects of fuels and vehicles.

A major challenge ahead is the approaching end of the Oil Age—not only due to climate policies, but for economic reasons stemming from the depletion of easily recoverable oil resources. As fossil fuels are replaced by alternatives of lesser energetic quality, the future of mobility remains largely unknown. While the world aims to embrace more sustainable mobility, most alternative powertrain technologies depend on quantities of rare and nonrenewable natural resources, and therefore are not truly sustainable. Another often suggested approach—that of fueling the ICE by low-carbon e-fuels—suffers from low efficiency and would require substantial amounts of energy, which seems problematic in an economy that no longer has access to cheap and abundant fossil energy. All this suggests that future mobility will be based on a mix of powertrain technologies, where combustion engines continue to play an important role.

DieselNet—initially an information service on diesel engines and emissions—evolved over the decades to become the central internet resource for technical and business information related to all types of internal combustion engines, their fuels, emissions, and the technologies required by the clean and efficient engines of the future.