25 November 2014: Re-written and updated summary of US emission standards for heavy-duty onroad diesel engines.
24 November 2014: A a new report by the World Bank, titled "Turn Down the Heat" [press release | full report], finds that globally, warming of ~1.5°C above pre-industrial times—up from 0.8°C today—is already locked into Earth’s atmospheric system. The predicted effects include some 30 cm of sea level rise by 2100, more severe droughts and the extinction of 90% of the world’s coral reefs.
21 November 2014: Updated summary of Brazilian diesel fuel regulations includes the recent ANP 50/2013 specification.
20 November 2014: A new report by the Natural Resources Defense Council (NRDC), the Sierra Club and the Clean Air Task Force concludes that the US EPA could cut climate warming methane emissions in half by targeting the oil and natural gas industries—the largest sources of emissions of methane. The report recommends that the EPA issue nationwide methane standards, such as leak detection and mandatory control practices for equipment used on wellpads, gas processing plants and compressors. A summary of the report was released today, the full report is expected later this Fall.
17 November 2014: Updated summary of Brazilian biodiesel standards includes the new ANP 45/2014 specification.
12 November 2014: IEA releases the World Energy Outlook 2014, which predicts that world primary energy demand will increase by 37% by 2040. World oil supply will rise to 104 million bpd in 2040, with the Middle East becoming the major source of supply growth. Energy-related CO2 emissions will grow by one-fifth by 2040 [more ...]
11 November 2014: The recently published Stage V proposal is now covered in the updated summary of EU nonroad emission standards.
10 November 2014: The updated Technology Guide paper on diesel combustion systems includes a new section on deep spray angle piston bowls, a number of other revisions throughout the text and eight new figures.
6 November 2014: The global energy demand will increase by 60% by 2040, with fossil fuels remaining the main source of supply—in spite of efforts to mitigate climate change—predicts Opec in its World Oil Outlook 2014. Oil prices will average $177 per barrel by 2040 and the world will need an additional 21 million bpd of crude to meet the predicted 2040 demand of 111 million bpd. The forecast is contingent on the continuing growth of the population and the economy, particularly in Asia.
31 October 2014: Summary of technical sessions from the ASME 2014 ICE Fall Technical Conference held on October 19-22, 2014 in Columbus, Indiana, USA and hosted by Cummins [more ...]
29 October 2014: Updated Technology Guide paper on Fixed Geometry Turbochargers.
9 October 2014: The European Commission proposes implementing measures for the Fuel Quality Directive, allowing unrestricted use of high-carbon crudes and fuels [more ...]
8 October 2014: EUROMOT issues a press release and a fact sheet (FAQ) on the recently proposed Stage V emission standards for nonroad machinery. The association is critical about the wide scope of the regulation, the proposed very stringent emission requirements for engines used in inland marine vessels, and about the lack of provisions to allow sales of pre-Stage V replacement engines.
4 October 2014: Updated paper on Valves and Ports in Four-Stroke Engines—added discussion and new figures on valve design and on valve overlap.
1 October 2014: FlowGreen Emission Control—now on DieselNet—is a new supplier of aftermarket emission control products, such as replacement diesel particulate filters and catalytic converters, for heavy-duty diesel engines.
26 September 2014: Updated paper on Exhaust Gas Recirculation—added sections on dedicated EGR and on EGR in gasoline engines.
25 September 2014: The European Commission proposes Stage V emission standards for mobile nonroad engines. The proposal includes a particle number limit that would force DPF technology on nonroad engines of 19-560 kW [more ...]
23 September 2014: AVL updated their DieselNet content with information on the iGeneration Series II emission testing system.
22 September 2014: Global CO2 emissions last year reached 36.1 billion tonnes, 706 million tonnes or 2.3% more than in 2012, according to a series of new studies. Most of the increased emissions came from India, China and the United States. The scientists predict that CO2 emissions will continue to increase in the future (by 2.5% this year), and estimate that in 30 years the world will warm by about 1.1°C from now.
8 September 2014: Presentations and posters from the 18th ETH Conference on Combustion Generated Nanoparticles, held in Zürich on June 22-25, 2014, are now available for download from the conference website.
2 September 2014: Updated summary of Indian 2- and 3-wheel vehicle emission standards reflects the recently adopted BS IV standards for motorcycles.
22 August 2014: Emissol—now on DieselNet—is an engineering firm specializing in automotive powertrain technologies, engine emission reduction and aftertreatment technologies.
21 August 2014: Updated Technology Guide paper on PM Measurement: In-Situ Methods—added section on field measurement of particle number concentrations.
20 August 2014: EU Commission will release their real driving emissions (RDE) proposal for light-duty vehicles by the end of this year, according to Reuters. The current European NEDC test underestimates the emissions of CO2 and NOx that are observed under real driving conditions. This discrepancy is believed to be responsible, at least in part, for the fact that the consecutive tiers of EU emission standards have brought less air quality improvement than anticipated. The new RDE testing approach has been under development for a number of years to more accurately represent real world driving. RDE testing requirements could make the existing emission standards significantly more challenging for the automakers.
13 August 2014: Updated Technology Guide paper on Superchargers—added information on Audi’s electrically driven centrifugal supercharger.
7 August 2014: Updated Technology Guide paper on Urea Dosing and Injection Systems.
28 July 2014: Soot (PM) Sensors—a new Technology Guide paper provides an overview of sensors for DPF soot mass estimation and OBD-type sensors for the detection of DPF leaks.
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.