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Shifting gears: The effects of a future decline in diesel market share on tailpipe CO2 and NOx emissions in Europe

The market share of fuel-efficient new diesel cars in the European Union has remained above 50% since 2010, greatly aiding the EU’s efforts to reduce carbon emissions. But diesel market share is...
Published 2017.07.05: Publication

Laboratory and on-road emission testing of in-use passenger vehicles in India

Considering the overwhelming evidence of high in-use NOx emissions from diesel cars in Europe and the US, the impact of NOx emissions in human health, and the growing numbers of new diesel passenger...
Published 2017.06.26: Publication

Impacts and mitigation of excess diesel NOx emissions in 11 major vehicle markets

Access publication here: Nature, 25 May 2017, doi:10.1038/nature22086 Nitrogen oxide (NOx) emissions from diesel cars, trucks, and buses are a major contributor to air pollution-related deaths...
Published 2017.05.15: Publication

NOx emissions from heavy-duty and light-duty diesel vehicles in the EU: Comparison of real-world performance and current type-approval requirements

More diesel vehicles are sold in Europe than in China, India, and all of the Americas combined—over 8.8 million in 2014 alone, more than double the sales in the next largest diesel market, China (...
Published 2017.01.05: Publication

On-road testing of CO2 and exhaust emissions from Euro 6 passenger cars in the EU

In 2015, the ICCT commissioned Emissions Analytics, a commercial test house specializing in testing real-world fuel consumption and emissions, to perform on-road testing of Euro 6-regulated gasoline...
Published 2016.11.14: Publication

Strengthening the regulation of defeat devices in the European Union

Although the language in the U.S. and EU regulations on vehicle emissions testing prohibiting defeat devices, and defining exemptions or exceptions, is very similar, the regulations have been...
Published 2016.08.12: Publication

Defeat devices under the U.S. and EU passenger vehicle emissions testing regulations

The paper aims to illuminate a paradox: Volkswagen and other automakers have asserted that software managing the emissions control systems on some of their vehicles, which they acknowledge either is...
Published 2016.03.22: Publication

The future of vehicle emissions testing and compliance

A growing body of evidence indicates that one of the reasons for a rapidly growing discrepancy between official and real-world fuel consumption and emission values of new passenger cars is...
Published 2015.11.23: Publication

Policy solutions to reduce vehicle exhaust emissions under real-world driving conditions

Policymakers worldwide are looking for ways to address the challenge of controlling real-world emissions brought to forefront by the Volkswagen case. In this position brief, we propose a rapid and...
Published 2015.10.01: Publication

NOx control technologies for Euro 6 diesel passenger cars

Controlling nitrogen oxide (NOx) emissions from Euro 6 diesel passenger cars is one of the biggest technical challenges facing automakers. Euro 6 limits NOx emissions from diesel passenger cars to...
Published 2015.09.03: Publication

Accelerating progress from Euro 4/IV to Euro 6/VI vehicle emissions standards

After the adoption of Euro 5/V standards in the EU, certain shortcomings in the regulation became apparent. For heavy-duty vehicles, Euro V standards have not achieved hoped-for reductions for NOx...
Published 2015.03.05: Publication

Comparing real-world off-cycle NOx emissions control in Euro IV, V, and VI

Heavy-duty vehicles built and certified in conformity to Euro IV and V emissions standards frequently do not achieve the real-world NOx emissions expected under those standards. Now data is becoming...
Published 2015.03.02: Publication

Real-world exhaust emissions from modern diesel cars

This study, a meta-analysis of PEMS data from EU (Euro 6) and US (Tier 2 Bin 5/ULEV II) diesel passenger cars, documents the wide discrepancy that exists between official certification or type-...
Published 2014.10.11: Publication

In-use emissions testing of light-duty diesel vehicles in the U.S.

The ICCT contracted with the Center for Alternative Fuels, Engines and Emissions at West Virginia University to conduct in-use testing of three light-duty diesel vehicles, using a portable emissions...
Published 2014.05.30: Publication

Supplemental NOx standards for Euro IV/V HDVs in Beijing

Some heavy-duty diesel vehicles certified to the Euro IV and V standards emit excess NOx emissions when operating in low-speed, urban driving conditions. In some cases, real-world NOx emissions from...
Published 2013.07.18: Publication

Urban off-cycle NOx emissions from Euro IV/V trucks and buses

Despite meeting more stringent regulatory standards for exhaust emissions during type approval, many Euro IV and Euro V heavy-duty vehicles equipped with selective catalytic reduction (SCR) systems...
Published 2012.04.10: Publication