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Real-world fuel consumption of popular European passenger car models

Official fuel consumption values for new passenger cars in Europe are increasingly unrepresentative of real-world performance. The divergence between official and real-world fuel consumption more...
Published 2016.01.14: Publication

The future of vehicle emissions testing in Europe (and beyond)

At the ICCT we have been analyzing the growing gap between official and real-world vehicle fuel consumption and CO2 emissions of passenger cars in Europe for a few years now. We showed for the first...To solve the problem underlying the growing gap between certification-test and in-use CO2 and NOx emissions, we will have to go beyond just introducing a new test procedure.
Published 2015.11.23: Blog Post

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

The miseducation of the diesel car

I recently read an open letter in the Corriere della Sera by a VW engineer working on engine development and emissions (that’s what I call a hot seat!). The letter contains some pretty remarkable...The preliminary agreement on the EU's Real-Driving Emissions regulation is a missed opportunity to address the air-quality problem by forcing the technological adjustments required to bring real...
Published 2015.11.04: Blog Post

New revelations of Clean Air Act violations by Volkswagen [press statement]

The International Council on Clean Transportation once again commends the U.S. Environmental Protection Agency and the California Air Resources Board for their rigorous, effective work to enforce the...
Published 2015.11.03: News

Brazil is not ready for diesel cars

The Portuguese version of this blog was developed by Instituto de Energia e Meio Ambiente (IEMA). Sales of diesel passenger cars and commercial vehicles with capacity inferior to 1,000 kg have been...Brazil should hold the line and continue to ban sales of diesel passenger cars.
Published 2015.09.28: Blog Post

Testing the dirty diesels too

The new head of Secretariat of the Environment and Natural Resources (SEMARNAT), Rafeal Pacchiano Alamán, has announced that Mexico will undertake a real-world, in-use testing program for diesel...Mexico's newly announced real-world testing program for diesel vehicles is a great step. Unfortunately, we already know they won’t be clean. So there are other steps to take.
Published 2015.09.28: Blog Post

EPA's notice of violation of the Clean Air Act to Volkswagen [press statement]

Investigation into "defeat device" allegedly used to circumvent emissions tests began with ICCT-sponsored research on in-use emissions from diesel passenger cars Highlights the global need for...
Published 2015.09.18: News

Vehicle emissions testing in the EU: Why we are still struggling with the dead hand of the past—and what the future is likely to bring

The Committee on Climate Change (CCC) was established in 2008 to advise the British government on emissions targets and report to Parliament on progress made in reducing greenhouse gas emissions and...Manufacturers effectively exploit loopholes in the vehicle CO2 emissions test procedure. The WLTP will help, but can't solve the problem entirely; we need in-use conformity and on-road testing in the...
Published 2015.09.09: Blog Post

[Press release] Vehicle tests show dramatic variation in NOx emissions from modern diesel cars on new EU test cycle, with exceedances up to 15 times the current regulatory limit

Some automakers meeting diesel NOx emissions standards under more realistic driving conditions, while others lag badly. The technologies to control emissions of nitrogen oxides (NOx) from modern...
Published 2015.09.03: News

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 80...
Published 2015.09.03: Publication

China Heavy-Duty Vehicle Compliance Workshop

On June 8th, 2015, the ICCT and the Vehicle Emission Control Center of China’s Ministry of Environment Protection co-organized an International Workshop on Heavy-duty Vehicle Emissions Compliance...
Published 2015.07.23: Event

Review and comparative analysis of in-use vehicle emission control programs in Guangdong Province

Controlling emissions from the in-use fleet, particularly from high emitters and older vehicles, can immediately alleviate urban air pollution. As pressure to address China's air quality issues...
Published 2015.06.29: Publication

Technical training workshop on light-duty vehicle regulations

Taller de Capacitación Técnica en materia de regulaciones para vehículos ligeros  Organizado por el Centro Mexicano de Derecho Ambiental (CEMDA) en colaboración con el International Council on Clean...
Published 2015.04.23: Event

Want to help China's smog problem? Some lessons learned from the U.S. Clean Air Act

Over the past two weeks, former CCTV reporter Chai Jing’s documentary “Under the Dome – Investigating China’s Smog” caused a sensation in China and the rest of the world. We were (naturally)...China is in the process of amending its Clean Air Law. Experience with the CAA highlights some key principles that can help give environmental agencies the teeth they need.
Published 2015.03.13: Blog Post

Global overview of on-board diagnostic (OBD) systems for heavy-duty vehicles

On-board diagnostic (OBD) systems monitor the performance of engine and aftertreatment components, including those responsible for controlling emissions. The OBD system is designed to help ensure...
Published 2015.02.09: Publication

Which vehicle emissions test cycle is most demanding?

After we published our new test cycle conversion factors, a question came up: which of the test cycles is the most demanding, in terms of its impacts on fuel efficiency or CO2 emissions, and how much...Even though it’s a simple enough question, it has no simple answer, since the new conversion factors vary with vehicle efficiency and are different for gasoline and diesel engines. However, in our...
Published 2015.02.06: Blog Post

[Pressemitteilung] Reale Emissionen moderner Diesel-Autos sieben Mal höher als gesetzlich erlaubt

Die realen Stickoxidemissionen moderner Diesel-Pkw liegen durchschnittlich sieben Mal höher als laut der seit September 2014 geltenden Abgasnorm Euro 6 erlaubt. Zu dieser Schlussfolgerung gelangt...
Published 2014.10.11: News

A trend that can’t continue: The gap between official and real CO2 reductions from Europe’s passenger car fleet keeps growing

Our report last year documenting the worsening gap between official, test-based CO2 emissions from Europe’s passenger cars and what drivers actually experience on the road received a lot of attention...We've just released an update to our study of the discrepancy between offiical and real-world CO2 emissions from passenger cars in the EU. The bad news: the gap continues to increase, and at an...
Published 2014.09.28: Blog Post

The 4th Sino-US Workshop on Motor Vehicle Pollution Prevention and Control

On June 9-10, 2014, the International Council on Clean Transportation (ICCT) and the Vehicle Emission Control Center of the Ministry of Environmental Protection (VECC-MEP) co-sponsored the 4th Sino-...
Published 2014.06.30: Event

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