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The role of standards in reducing CO2 emissions of passenger cars in the EU

The origin of the EU vehicle CO2 regulation is by now a well-known story. European car manufacturers promised to voluntarily reduce average CO2 emissions of new cars to 140 g/km by 2008, starting in...
Published 2018.02.12: Publication

Real-world emissions in China: A meta-study of PEMS data

Vehicle emissions control programs in China have made considerable progress, mainly attributed to the uptake of emissions control technologies driven by increasingly stringent standards and improved...
Published 2018.02.12: Publication

How well are governments enforcing vehicle emissions standards? Worldwide, the answer is: Not as well as they could be

New survey-based study shows notable disparities in compliance activities, accomplishments among most important global vehicle markets Washington DC—A new study cataloging and evaluating the efforts...
Published 2017.11.14: News

Global baseline assessment of compliance and enforcement programs for vehicle emissions and energy efficiency

As vehicle pollution and fuel efficiency regulations have become more stringent, the technologies required to mitigate emissions and reduce fuel consumption become increasingly complex. One...
Published 2017.11.14: Publication

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

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 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 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

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