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DieselNet: Internal Combustion Engine & Emission Technology

Engine & emission technology online—since 1997

The Log

15 June 2019: The summary of Brazilian emission standards for heavy-duty engines has been updated to cover the recently adopted PROCONVE P-8 regulation.

12 June 2019: Although the US Defense Department has reduced its fossil fuel consumption since the early 2000s, it remains the world’s single largest consumer of oil—and as a result, one of the world’s top greenhouse gas emitters. A new paper by Neta C. Crawford of Boston University, titled Pentagon Fuel Use, Climate Change,and the Costs of War (see also Life Science summary), specifically examines military fuel usage for the US post-9/11 wars and the impact of that fuel usage on GHG emissions. The best estimate of US military GHG emissions from 2001, when the wars began with the US invasion of Afghanistan, through 2017, is that the US military has emitted 1,212 million tonnes of CO2e. In 2017, for example, the Pentagon’s GHG emissions were greater than the GHG emissions of entire industrialized countries such as Sweden or Denmark.

11 June 2019: BP has released its annual Statistical Review of World Energy, showing that the global economic growth experienced in 2018 was fueled by a strong increase in energy consumption, and produced a corresponding increase of CO2 emissions [more ...]

5 June 2019: Mazda announced it is accepting orders in the European market for the new Mazda3 Skyactiv-X featuring the spark plug controlled compression ignition (SPCCI) technology [more ...]

30 May 2019: The May issue of DieselNet Update is now available for your reading pleasure (subscription required).

27 May 2019: Summary of technical sessions at the 40th International Vienna Motor Symposium held on May 15-17, 2019 in Vienna, Austria [more ...]

25 May 2019: Emission standards—added summary of Norwegian Marine Regulations.

23 May 2019: Added summary of EU Occupational Health Regulations, which now include an exposure limit value for diesel engine exhaust emissions.

21 May 2019: The summary of EU CO2 emission standards for light-duty vehicles has been updated to cover the 2025/2030 regulation published last month.

17 May 2019: Updated Technology Guide paper on Gasoline Particulate Filters, with more information on filter regeneration, pressure drop effects, and configuration of GPF systems.

16 May 2019: Updated Business Directory Page of Exothermia—the creator of simulation software for exhaust aftertreatment, engines, and powertrains.

15 May 2019: Diesel-Electric Locomotives—a new book provides a wealth of information on contemporary diesel-electric locomotives, their sub-systems and components, and the energy and environmental aspects of diesel-electric railroads. The richly illustrated book has been authored by Walter Simpson and published by Simmons-Boardman Books.

13 May 2019: The World Energy Investment 2019 report by the International Energy Agency (IEA) signals a growing mismatch between current energy investment and the global energy supply needs [more ...]

10 May 2019: Updated Technology Guide paper on Methane Oxidation Catalysts.

30 April 2019: Summary of the technical sessions on engine and emission technology at the SAE WCX 2019 conference held April 9-11, 2019 in Detroit, Michigan [more ...]

24 April 2019: Updated summaries of Chinese emission standards for nonroad engines and for 3-wheel vehicles.

23 April 2019: The California Air Resources Board (CARB) released a white paper that discusses CARB assessment of the technical feasibility of lower NOx standards and associated test procedures for 2022 and subsequent model year medium- and heavy-duty diesel engines [more ...]

22 April 2019: Wager Company updated their Business Directory Page to reflect their current lineup of diesel smoke opacity meters.

12 April 2019: A new study by a PNNL team explains the deactivation of Cu/SAPO-34 SCR catalysts that has been linked to the failure of several commercial SCR systems [more ...]

9 April 2019: The Technology Guide paper on Turbocharger Durability and Materials has been updated and expanded with more information on compressor wheel design and turbine wheel materials.

7 April 2019: Fiat Chrysler will pool fleets with Tesla to avoid EU CO2 emission fines, according to the Financial Times. Fiat Chrysler has agreed to pay Tesla “hundreds of millions of euros” so that Tesla electric, zero-emission vehicles are counted in its fleet. This could make it possible for Fiat to meet its EU CO2 emission targets and avoid excess emission fines. Under EU regulations, manufacturers must pay 95 euros per vehicle for each g CO2/km that exceeds the target. Several manufacturers may form a pool to jointly meet their CO2 emission targets.

6 April 2019: Average CO2 emissions from new cars sold in the European Union in 2017 rose by 0.4 g/km from 2016, according to a report published by the European Environment Agency that documents the latest official data submitted by EU Member States and vehicle manufacturers. This increase brings car manufacturers further away from their 2021 targets [more ...]

4 April 2019: Updated Technology Guide paper on LTC Applications includes a new section on RCCI combustion.

29 March 2019: Natural Gas Quality—a new Technology Guide paper discusses fuel quality parameters that need to be considered to utilize the benefits of natural gas in vehicle applications.

26 March 2019: Energy demand worldwide grew by 2.3% last year, its fastest pace this decade, according to the IEA’s Global Energy & CO2 Status Report. Fossil fuels met nearly 70% of this demand growth for the second year running [more ...]

21 March 2019: Vehicle fuel economy improvements have slowed globally according to GFEI’s latest report, Fuel Economy In Major Car Markets: Technology And Policy Drivers 2005-2017. The slowdown was especially pronounced in advanced economies. Overall, global fuel economy has improved by an average of 1.7% per year over the past 12 years. The global rate of improvement has slowed to 1.4% in the past two years, with improvements in advanced economies slowing down to an average of just 0.2% per year between 2015 and 2017. A total of 27 countries—including Sweden, Canada and the United Kingdom—actually saw the fuel economy of their fleets stagnate or worsen from 2015 to 2017.

20 March 2019: ADAC released the results of a 50,000 km test of three Euro 5 diesel vehicles—a passenger car and two vans—retrofitted with urea-SCR systems [more ...]

18 March 2019: The rebound in oil investment is ‘very minimal’, said the OPEC Secretary General Mohammed Barkindo talking to Reuters on the sidelines of an OPEC and non-OPEC monitoring committee that was meeting in Baku during the weekend. “A number of challenges are arising from the down cycle that we have seen, and at the top of that list is an issue of investments. We have seen investments contract for couple of years and even at the moment the rebound is very, very minimal,” Barkindo said. According to estimates from Saudi Aramco Chief Executive Officer Amin Nasser last year, the global oil and gas industry needs to invest more than $20 trillion over the next 25 years to meet expected growth in demand and compensate for the decline in developed fields.

15 March 2019: Updated and expanded paper on Controls for Modern Engines includes a new section on vehicle data communication networks and other additions.

11 March 2019: In its Oil 2019 report released today, the IEA predicts global oil demand will be increasing over the next five years, with the United States driving global oil supply growth thanks to its shale industry, triggering a rapid transformation of world oil markets. However, the unprecedented growth of US shale oil production is expected to slow markedly—many of the most productive areas are expected to show signs of depletion by the mid-2020s [more ...]

4 March 2019: The total average of CO2 emissions from European cars increased by 2.4 g/km to 120.5 g/km in 2018—the highest average of the last four years—driven by the declining market share of diesels [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.