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.
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.
23 July 2015: The Joint Research Centre (JRC) released the final report from the EU-PEMS PM Pilot program [more ...]
20 July 2015: Summary of technical sessions from the SV Conference on Sensors for Exhaust Gas Cleaning and CO2 Reduction held in Nuremberg, Germany on June 23-25, 2015.
17 July 2015: Emission standards: Added an overview of European Low Emission Zone programs.
13 July 2015: Updated Technology Guide paper on In-Cylinder Thermal Barrier Coatings.
8 July 2015: Updated summary of Chinese fuel standards—added summary table with national sulfur implementation schedule for diesel and gasoline fuels.
6 July 2015: The EU JRC has finalized its assessment report of the PEMS procedure for in-service conformity (ISC) testing of Euro VI heavy-duty vehicles. In the assessment, the JRC emphasizes the importance of including low power urban driving—a driving mode responsible for significant amounts of the total NOx emitted—in the PEMS testing. In particular, the report recommends that cold start emissions should be included in the PEMS test and that the power threshold be lowered from 20% to 10%, to improve the evaluation of urban operation.
20 June 2015: US EPA, NHTSA propose Phase 2 greenhouse gas and fuel efficiency standards for heavy-duty trucks [more ...]
19 June 2015: Toyota launched a new diesel engine with thermal insulation technology that achieves a 44% thermal efficiency [more ...]
13 June 2015: Emission standards: Added summary of European emission standards for nonroad spark ignited engines.
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.