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DieselNet: Diesel Engine Emissions Online

Engine & emission technology online—since 1997

The Log

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 ...].

26 April 2017: CORMETECH manufactures homogeneous titania-based ceramic honeycomb SCR catalysts and provides catalyst testing and analysis services.

24 April 2017: We’ve updated the Technology Guide material on idle reduction technologies and restructured the idle emission coverage into two papers: Idling Emissions and Idle Reduction Technologies.

11 April 2017: The fuel efficiency and CO2 emissions of European heavy-duty vehicles have improved significantly over the last 20 years, according to a new ACEA report Reducing CO2 from trucks: Progress in practice. While the rate of improvement varies between manufacturers, it has been on the order of 1% per year.

27 March 2017: Updated Technology Guide paper on Valves and Ports in Four-Stroke Engines—we added a new section discussing the impact of cylinder head manufacturing on swirl and flow.

20 March 2017: Updated and expanded Technology Guide paper on Fuel Property Testing: Low Temperature Operability.

15 March 2017: US EPA/NHTSA to re-open Midterm Evaluation of the 2025 GHG emission and fuel economy standards [more ...].

14 March 2017: Updated and expanded summary of the WLTC test cycle.

13 March 2017: A new section on white smoke control has been added in the Technology Guide paper on HD Diesel Engine Technology—US 1990-1998.

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.