Search Results

Too low to be true? How to measure fuel consumption and CO2 emissions of plug-in hybrid vehicles, today and in the future

The global market for electric vehicles is growing rapidly and plug-in hybrid electric vehicles (PHEVs) play a particularly important role given their relatively high market share – accounting for 13...
Published 2017.07.28: Publication

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

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

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

Estimated Cost of Gasoline Particulate Filters

The gasoline particulate filter (GPF) is a device that can be installed on the tailpipe of a gasoline vehicle to capture and reduce emissions of particulate matter, a common pollutant. The European...
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