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Development of specifications for heavy-duty tractor trucks in Canada and the United States

This collaborative study between the International Council on Clean Transportation (ICCT) and the North American Council for Freight Efficiency (NACFE) examines the process of how the features of...
Published 2018.10.23: Publication

Assessing real-world CO2 emissions using simulation and PEMS data

The Real Driving Emissions (RDE) testing procedure will introduce on-road testing as well as not-to-exceed emission limits for new passenger cars in Europe. However, for the time being, these on-road...
Published 2016.06.21: Publication

Official vs. real-world road-load parameters in EU vehicle efficiency testing

On average, real-world fuel consumption and CO2 emissions of new European passenger cars exceeded official vehicle type-approval values by approximately 40 percent in 2014. This paper shows that...
Published 2016.05.09: 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

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

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

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

Bought a tiger, got a Hello Kitty? How to fix vehicle fuel economy fraud in China

China’s most powerful government-controlled television broadcaster, CCTV, is famous for sensational stories exposing product-quality issues. Its March 15 show made auto industry PR specialists in...China’s powerful government-controlled broadcaster, CCTV, not long ago did a show on vehicle fuel economy fraud, and that has made auto industry PR specialists uneasy. Here's how to calm their poor...
Published 2014.05.30: Blog Post

EU consumer organizations asking for more realistic vehicle testing

CO2 emission values for type approval of new cars are determined under laboratory conditions. But real-world driving cannot be perfectly simulated in the laboratory; for example, in laboratory...BEUC, FIA, and ANEC are demanding that the European Commission address the growing gap between type-approval and real-world CO2 emissions and fuel consumption.
Published 2012.12.14: Blog Post

Complexifying the report on the Fusion and C-Max hybrids a little

First Hyundai and Kia, now Ford? Last week Consumer Reports questioned the official estimates of fuel economy for Ford's new Fusion and C-Max hybrids, reporting that in their tests "the Fusion Hybrid...Hyundai, Kia—now Ford? Maybe, but some additional aspects to this situation with the Fusion and C-Max hybrids are worth calling to light.
Published 2012.12.11: Blog Post

Laboratory versus real world: Discrepancies in NOx emissions in the EU

Last week we published the new edition of our pocketbook of European Vehicle Market Statistics. For those interested in road vehicles and their impact on our climate and air quality, the pocketbook...NOx emissions from gasoline cars in the EU have decreased significantly since 2000. Not so for diesel cars, and the increasing numbers of diesel vehicles is intensifying the resulting health problems...
Published 2012.11.07: Blog Post

In-use Testing for CO2 and Fuel Economy in the United States

  China is considering including an after-production conformity test as part of China’s Phase 3 passenger car fuel consumption standard implementation and enforcement plan and is looking for...
Published 2012.03.09: Publication