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South American Summit on Vehicle Emissions Control

Click here to see the final agenda, with links to presentations. The South American Summit on Vehicle Emissions Control took place in Buenos Aires, Argentina on 26–27 September, 2018. The event was...
Published 2018.09.06: Event

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

A new study published online May 15 in the journal Nature quantifies the global health and environmental burden of real-world diesel NOx emissions in 11 major vehicle markets. The study found that...
Published 2017.05.22: Event

New study quantifies global health, environmental impacts of excess nitrogen oxide emissions from diesel vehicles

Diesel vehicles in major markets produce over 50% more NOx than official certification limits indicate Study links these excess NOx emissions to ~38,000 premature deaths worldwide in 2015—mostly in...
Published 2017.05.15: News

Opel's admissions of defeat device calibrations

A little while ago I blogged about the widespread practice by automakers in the EU of reducing nitrogen oxide (NOx) emission controls at ambient temperatures below 10 °C–17 °C and after a hot restart...Opel admits to reducing vehicle emission controls based on conditions other than ambient temperature or restart. Opel says its “engines are in compliance” in Europe. But, once again, they would not...
Published 2016.06.15: Blog Post

First look: Results of the German transport ministry's post-VW vehicle testing

In September 2015, shortly after it became known that Volkswagen applied illegal defeat devices in some of its diesel vehicles, the German Ministry for Transport (BMVI) commissioned a series of...Germany, the UK, and France last week released results of testing they commenced after VW admitted to using defeat devices to circumvent emissions tests. The situation seems even worse than expected...
Published 2016.04.25: 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

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

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

Cleaning up the diesel vehicles already on the road

Older diesel vehicles are prime culprits when it comes to both urban air pollution and climate change. Although they usually make up only a small percentage of all the vehicles in a region, they...Old diesel vehicles are prime culprits when it comes to both urban air pollution and climate change. Although they usually make up only a small percentage of all the vehicles in a region, they can...
Published 2013.08.02: Blog Post

Best practices in emission control of in-use heavy-duty diesel vehicles

This report summarizes policy approaches to controlling in-use emissions from heavy-duty vehicles (HDVs), including freight trucks, buses, municipal government and other service fleets. HDVs, while...
Published 2013.08.02: Publication

Overview of China's vehicle emission control program

In booming China, vehicle ownership of all kinds is soaring. Since 2000, the total stock of cars, trucks, and buses has more than quadrupled, from 13.5 million to over 60 million, and the number of...
Published 2011.04.07: Publication