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Will a new test procedure solve the problem? Latest developments on EU vehicle testing

Over the last few weeks, we published two major reports on the real-world emission behavior of passenger cars in Europe. The first one talked about air pollutant emissions, specifically nitrogen...Two recent ICCT reports clearly demonstrate the serious on-road problem for CO2 and NOx emissions in Europe. The European Commission is working on it, but the approaches chosen to address the real-...
Published 2014.10.30: Blog Post

The WLTP: How a new test procedure for cars will affect fuel consumption values in the EU

The current European type-approval procedure for fuel consumption and CO2 emissions of cars (the New European Driving Cycle, or NEDC) includes a number of tolerances and flexibilities and no longer...
Published 2014.10.29: Publication

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

From laboratory to road: A 2014 update

Europe’s passenger-car efficiency regulation has very effectively driven down the official average CO2 emissions and fuel consumption of new passenger cars in the EU. The 2015 target of 130 grams of...
Published 2014.09.28: Publication

Travelcard Nederland BV datasource document: Fuel consumption of Dutch passengers cars in business use 2004-2012

Travelcard Nederland BV offers a fuel card system that can be used at any gas station in the Netherlands and at more than 33,000 fuel stops across Europe. About 200,000 vehicles, out of the 8 million...
Published 2013.08.05: Publication

From Laboratory to Road

Fuel consumption and carbon dioxide emission values for new cars in Europe are determined via the so-called type-approval process, which involves testing vehicles under laboratory conditions using...
Published 2013.05.27: Publication

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

Influence of rolling resistance on CO2

The 9th meeting of the informal subgroup on the development of the WLTP test procedure (WLTP-DTP) (16–18 April 2012, Bern) included a discussion of whether, and how, the selection of tires should be...
Published 2012.11.27: Publication

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

Discrepancies between type-approval and real-world fuel consumption and CO2 values in 2001-2011 European passenger cars

In order to limit the negative effects of climate change and to reduce dependency on oil imports, the European Union (EU) needs to reduce its GHG emissions by 80-95% below 1990 levels by 2050. A...
Published 2012.04.04: Publication

Inertia classes, vehicle emissions tests, and the dead hand of the past

Test procedures are a key feature of any system of regulating vehicle emissions. Vehicle emissions testing* involves running a vehicle on a chassis dynamometer, which (among other things) simulates...The current system of using inertia classes for vehicle emissions testing is an anachronism, kept in place by force of habit rather than force of logic. And it has the bad effect of allowing...
Published 2011.12.09: Blog Post

Vehicle test mass definition and inertia mass step-less approach

  At the 7th DTP meeting (Sept 12-14, 2011) it was agreed in principle to accept the proposal from the Netherlands (NL), Transport and Environment (T&E) and the International Council on Clean...
Published 2011.10.19: Publication

Focus on inertia classes

For historic reasons we make use of inertia classes and upper limits for inertia mass during the vehicle testing procedures today. Historically, the weight of a vehicle was represented by hanging...
Published 2011.10.19: Publication

Inertia classes proposal

Historically the weight of a vehicle was represented by hanging rotating inertia mass on a dynamometer. This approach required the use of discrete inertia classes and an upper limit for inertia mass...
Published 2011.06.17: Publication

Inertia classes in worldwide harmonized light vehicle test procedure (WLTP) development

The definition of vehicle weight used for testing procedures is an important decision when drafting the regulation on determining emission values under the WLTP. Currently, different inertia class...
Published 2011.05.18: Publication