The Log

27 May 2015: A new Technology Guide paper on thermal anemometer air mass flow sensors [announcement | paper]

25 May 2015: aurigna consulting GmbH provides consulting services in the areas of exhaust aftertreatment, filtration and separation technologies, as well as in business development and management.

16 May 2015: Diesel particulate filters do not cause engine fires or malfunction, concludes a recently released DPF evaluation report by the California ARB [more ...]

4 May 2015: China’s State Council advanced the timeline for 10 ppm gasoline and diesel fuel by one year making it available nationwide by January 2017. The new implementation schedule is now reflected in the updated summary of Chinese fuel regulations.

Summary of the technical sessions from the SAE 2015 World Congress that was held on April 21-23 in Detroit [more ...]

20 April 2015: Sensors, diagnostics and control systems are one of the most rapidly evolving areas of engine and exhaust gas aftertreatment technology. These topics will be discussed during the 2nd International Specialist Conference: SENSORS for Exhaust Gas Cleaning and CO2 Reduction organized by SV Veranstaltungen that will be held on June 23-25 in Nuremberg, Germany. DieselNet subscribers can register at a 20% discount—download the conference program with the promotion code.

17 April 2015: Updated Technology Guide paper on Common Rail Fuel Injection includes slow motion, optical engine videos that illustrate the dynamics of pilot and main injections—videos courtesy of the Combustion Research Facility of Sandia National Laboratories.

16 April 2015: US greenhouse gas emissions increased by 2.0% from 2012 to 2013, according to the greenhouse gas inventory report by the US EPA. The increase is attributed to such factors as increased emissions from electricity generation, an increase in miles traveled by on-road vehicles, and an increase in industrial production. The main sources of emissions include electricity generation (31%), transportation (27%) and industry (21%). GHG emissions in 2013 were still 9% below 2005 levels.

15 April 2015: New cars sold in the EU in 2014 emit on average 123.4 g/km of CO2—2.6% less than cars sold in 2013 and almost 7 g/km below the 2015 target, according to official data by the EEA. However, this improvement is in part due to flawed EU testing procedures—warned the T&E group—that are exploited by the manufacturers. Some new technologies, such as vehicles with downsized engines, are also more sensitive to testing conditions than older vehicles. Average fuel efficiency figures achieved by drivers on the road are up to 31% poorer than official figures, up from 8% in 2004. Later this year, the EEA plans to publish a report analyzing the key reasons for the growing differences observed between official and real world driving emissions.

10 April 2015: Cummins Emission Solutions designs, manufactures and integrates exhaust aftertreatment technology for the commercial onroad, nonroad and high-horsepower engine markets. You can subscribe to their online Emission Solutions Journal.

26 March 2015: Overall compliance in model year 2013 light-duty vehicles was 12 grams/mile better than required by the 2013 US EPA GHG emissions standard, according to the Manufacturer Performance Report released by the EPA. Most large manufacturers achieved fleet GHG compliance values lower than required by their unique 2013 standard and thus generated credits in the 2013 model year. Four manufacturers missed their 2013 standard, thus generating deficits, but in all cases these companies shrank their deficit relative to the 2012 model year.

25 March 2015: Updates in the Technology Guide paper on Diesel Filter Systems.

18 March 2015: The first issue of Emission Control Science and Technology (ECST)—a new journal published by Springer and edited by Athanasios Konstandopoulos and Mansour Masoudi—includes 9 articles, an editorial and a book review. All articles are free for the first two years of ECST publication (2015, 2016).

11 March 2015: New Technology Guide paper titled HD Diesel Engines with EGR Technology covers emission reduction strategies used in US EPA 2004 engines by different manufacturers, as well as Euro IV engines using EGR technology.

5 March 2015: Additional updates in the paper on Fuel Injection for Clean Diesel Engines—added more data on the use of pilot injections to control NOx emissions.

27 February 2015: Summary of the US EPA Workshop on Ultrafine Particles held on February 11-13, 2015 in Research Triangle Park, NC, USA [more ...]

25 February 2015: BOSMAL Automotive Research and Development Institute is a state-of-the-art laboratory and R&D center providing services in the area of emissions, fuels and lubricants testing, vehicle homologation, vehicle and component testing, as well as engine and powertrain development.

24 February 2015: Updated and expanded Technology Guide paper on Fuel Injection for Clean Diesel Engines. Most of the added material landed in the section on post injections. The additions include five new figures and three optical engine videos—courtesy of Dr. Christophe Barro of ETH Zürich.

18 February 2015: By 2035, world’s energy consumption will grow by 37% and carbon emissions by 25%, according to the BP Energy Outlook 2015 [more ...]

17 February 2015: Updated Technology Guide paper on Diesel Fuel Injector Nozzles includes a re-written and expanded section on variable injection nozzle geometry.

16 February 2015: The 19th ETH Conference on Combustion Generated Nanoparticles has issued a call for papers. Paper abstracts are due by April 10, 2015. The conference will be held from June 28th to July 1st, 2015 at the at ETH Zentrum in Zürich, Switzerland.

10 February 2015: Updates in paper on Emission Formation in Diesel Engines, including an expanded discussion of soot formation during diesel combustion.

6 February 2015: Emission standards: Argentina has released new Euro 5 implementation schedule for light-duty vehicles and heavy-duty engines.

5 February 2015: Updated MIRATECH page reflects the company’s current portfolio of emission reduction and sound attenuation products for stationary engines.

4 February 2015: Updated paper on Common Rail Fuel Injection—added more discussion on servo controlled nozzle response.

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.