The Log

27 November 2015: Updated summary of Indian emission standards for engines and vehicles.

26 November 2015: Summary of technical sessions from the ASME ICE Fall Technical Conference held on November 8-11, 2015 in Houston, Texas, USA [more ...]

6 November 2015: Updated and restructured summary of Canadian emission standards for engines and vehicles.

3 November 2015: Technical papers from the ASME 2015 ICED Fall Technical Conference are already available online. You need to be registered for the Conference to get access to the full text papers. If you haven't registered yet, it is time to do so—the ASME ICE Conference will be held next week (November 8-11) in Houston, TX, USA.

31 October 2015: Summary of emission sessions from the Integer Emissions Summit & DEF Forum held on October 27-29 in Chicago [more ...]

22 October 2015: New Technology Guide paper on urea dosing control in SCR systems [announcement | paper].

16 October 2015: CIMAC Position Paper: Impact of Gas Quality on Gas Engine Performance concludes that the knocking characteristic of natural gas—the methane number (MN)—has to be addressed in natural gas specifications. The MN should be close to 80 or higher for highest efficiency, economy and lowest GHG emissions.

15 October 2015: The California Air Resources Board (ARB) released a draft document “Technology Assessment: Medium- and Heavy-Duty Battery Electric Trucks and Buses.” This report identifies the status of battery electric vehicle (BEV) technology that can reduce GHG and criteria pollutant emissions from Class 2b through Class 8 vehicles. The assessment discusses BEV components, as well as trucks and buses that are commercially available or in demonstration stages, including transit buses, school buses, medium-duty trucks and shuttle buses, and heavy-duty trucks.

8 October 2015: Updated Technology Guide paper on Metallic Catalyst Substrates.

5 October 2015: The California Air Resources Board (ARB) will begin development of lower, mandatory NOx engine standards in 2017, said the ARB in their comments on the US EPA Phase 2 GHG proposal. The ARB also plans to petition the US EPA to establish lower, federal NOx engine standards. If US EPA fails to initiate its rulemaking by 2017, California ARB will continue with its efforts to establish a California-only standard, said the agency. California Optional Low NOx Standards for heavy-duty engines adopted last year include three optional NOx limits: 0.10, 0.05 and 0.02 g/bhp·hr. Commenting on the proposed Phase 2 GHG rule, the ARB said the EPA proposal misses opportunities to maximize GHG emission reductions and spur development of critical advanced technologies that can provide early climate benefits. Upon adoption of the federal Phase 2 standards, the ARB plans to develop and propose a California Phase 2 program tentatively in 2017.

1 October 2015: Updated and restructured Technology Guide material on NOx adsorber catalysts [announcement | NOx Adsorbers | NOx Adsorber Applications]

25 September 2015: Updated paper on Assisted Turbocharging, with added material on the Aristech 48 V electric supercharger and a number of other edits throughout the paper.

22 September 2015: Eleven million of Volkswagen diesel cars worldwide used dual calibration to defeat regulatory emission testing [more ...]

18 September 2015: Telonic Berkeley—a supplier of diesel opacity meters, with years of experience with diesel smoke testing and applications.

10 September 2015: Updated Technology Guide paper on Turbocharger Durability and Materials, with additions and edits in the sections discussing turbine and compressor wheel materials.

21 August 2015: Analytical Engineering, Inc. provides services in the area of engine and emission testing, engine & component development, and vehicle engineering.

1 August 2015: New Technology Guide paper Heavy-Duty Diesel Engines with Aftertreatment discusses US 2007/10 and Euro VI diesel engine technology.

28 July 2015: Summary of technical sessions from the 19th ETH Conference on Combustion Generated Nanoparticles that was held in Zürich, Switzerland, from June 29 to July 1, 2015.

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.