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DieselNet: Diesel Engine Emissions Online

Engine & emission technology online—since 1997

The Log

12 August 2017: The Technology Guide discussion of diesel combustion has been updated and re-structured into two papers: Combustion in Diesel Engines and Diesel Spray Formation and Mixing. A new section on in-cylinder mixing enhancement was added in the latter paper.

8 August 2017: Updated Technology Guide paper on Soot (PM) Sensors, with revised sections on RF sensors and accumulating electrode soot sensors.

29 July 2017: Summary of the technical sessions from the 21st ETH Conference on Combustion Generated Nanoparticles [more ...].

26 July 2017: A major emission study led by the Paul Scherrer Institute (PSI) has found that modern gasoline cars emit much more carcinogenic particulate matter—including black carbon (BC) and primary organic aerosol (POA)—than modern diesel cars. The study results also show that gasoline cars emit more volatile organic compounds (VOC) that form far more toxic secondary organic aerosol (SOA) compared to modern diesels [more ...].

25 July 2017: Updated Technology Guide paper on Fuel Injection for Clean Diesel Engines, with an entirely rewritten and expanded section on the use of post injections for soot control.

24 July 2017: Linde Gases Division supplies specialty gases for emission testing, purity calibration gases and gas mixtures, and specialty equipment.

22 July 2017: Summary of the technical sessions from the 4th Conference on SENSORS for Exhaust Gas Aftertreatment and CO2 Reduction [more ...].

13 July 2017: Updated Business Directory Page of Rypos—a provider of electrically regenerated, active DPF technology.

27 June 2017: Summary of the US DOE 2017 Annual Merit Review and Peer Evaluation, held in Washington, DC, on June 5-9, 2017 [more ...].

11 June 2017: The California Air Resources Board announced a solicitation for the Off-Road Advanced Technology Demonstrations Projects. Up to $17 million is available for projects that will demonstrate advanced port equipment, zero-emission cargo handling equipment, zero-emission ground support equipment, and zero-emission freight locomotive equipment. Non-freight categories such as construction equipment, agricultural equipment, and passenger transportation equipment will also be eligible for a smaller portion of the funding, although the focus will be on technologies that are freight enabling. Along with the On-Road Advanced Technology Demonstration Project released in May, it is part of a $34 million allocation for advanced technology freight demonstrations. Applications are due by September 7, 2017.

5 June 2017: The Technology Guide paper on biodiesel has been updated and divided into two parts: Biodiesel—Mono Alkyl Esters and Effects of Biodiesel on Emissions.

1 June 2017: The US EPA announced amendments to the 2017 Clean Diesel Funding Assistance Program RFP that was issued in April. The total funding has been increased from $11 million to $34 million, and Clean Alternative Fuel Conversions have been added to the list of eligible technologies. The deadline for submitting proposals has been extended until July 5, 2017. The amended RFP is available from the EPA Clean Diesel website.

27 May 2017: Updated Technology Guide paper on the Effect of EGR on Emissions—Added section on the effect of EGR on NO2.

22 May 2017: The California Air Resources Board announced a solicitation for the On-Road Advanced Technology Demonstrations Projects. Up to $17 million is available for projects that will demonstrate pre-commercial Intelligent Transportation Systems and Connected Trucks, Advanced Engines and Powertrains, and Zero-Emission Short and Regional Haul Trucks. Eligible vehicle types are limited to Class 7 and Class 8 on-road heavy heavy-duty trucks focused on freight activities. Applications are due by August 16, 2017.

16 May 2017: The European Commission and the Member States adopted a draft regulation that will require truck manufacturers to measure the fuel consumption and CO2 emissions of their vehicles using the VECTO simulation tool, starting from 2019 [more ...].

30 April 2017: Summary of technical sessions on engine and emissions topics from the SAE 2017 Congress [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 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.