Log in | Subscribe | RSS feed | FAQ

DieselNet: Internal Combustion Engine & Emission Technology

Engine & emission technology online—since 1997

The Log

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 ...]

26 February 2019: The Wall Street Journal: Frackers Face Harsh Reality as Wall Street Backs Away. Frequent infusions of Wall Street capital have sustained the U.S. shale boom. But that largess is running out. New bond and equity deals have dwindled to the lowest level since 2007. Companies raised about $22 billion from equity and debt financing in 2018, less than half the total in 2016 and almost one-third of what they raised in 2012.

19 February 2019: Negotiators from the European Parliament, Commission, and Council agreed on the final CO2 emission targets for heavy-duty trucks—a 15% emission reduction target by 2025, and a 30% target by 2030 [more ...]

16 February 2019: BP released the 2019 edition of its Energy Outlook, which analyzes the trends in global energy markets out to 2040 [more ...]

13 February 2019: The deficit in the palladium market looks set to widen dramatically in 2019, with stricter emissions legislation forecast to stimulate double-digit rises in palladium demand from European and Chinese automakers, according to the newest edition of the Pgm Market Report by Johnson Matthey. Palladium prices surged by about 70% in the last six months, exceeding $1400 per t.o., driven in part by record high autocatalyst demand, as stricter vehicle testing procedures—including the WLTP and RDE test requirements—increased loadings on European cars. The market for platinum, on the other hand, remains oversupplied, with pricing near 10-year lows at around $800 per t.o.

29 January 2019: Updated summary of Chinese emission standards for marine engines covers the 2019 expansion of the Chinese domestic emission control area (DECA) program.

14 January 2019: More updates in the Technology Guide paper on Variable Valve Actuation, including additional information on cam phaser technologies, switching mechanisms for switchable finger followers, and Camcon Intelligent Valve Actuation (IVA) camless technology.

10 January 2019: Fiat Chrysler has reached a settlement with the US EPA and CARB over diesel emissions cheating, and agreed to modify more than 100,000 noncompliant diesel vehicles sold in the United States and to pay a civil penalty of $305 million [more ...]

7 January 2019: The UK new car market declined by 6.8% in 2018, with annual registrations falling for a second year to 2,367,147 units, according to data by the Society of Motor Manufacturers and Traders (SMMT). The declining sales are attributed to the regulatory changes in EU type approval testing (such as the introduction of WLTC and RDE testing requirements) and by continued anti-diesel policies in the UK. Anti-diesel rhetoric and negative fiscal measures took their toll—the SMMT said—with the diesel sector down by 29.6% in 2018, and December marking the 21st consecutive month of decline for the fuel type. The sales of petrol vehicles increased by 8.7% in 2018, and the sales of alternative fueled vehicles (AFV) increased by 20.9%. The UK market share for diesels dropped to 31.7%, for petrol cars increased to 62.3%, and for AFVs increased to 6.0%. The strong growth in sales of AFVs were in part driven by a Government’s plug-in car grant that expired in October 2018.

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.