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

Laboratory and on-road emission testing of in-use passenger vehicles in India

Considering the overwhelming evidence of high in-use NOx emissions from diesel cars in Europe and the US, the impact of NOx emissions in human health, and the growing numbers of new diesel passenger...
Published 2017.06.26: Publication

On-road testing of CO2 and exhaust emissions from Euro 6 passenger cars in the EU

In 2015, the ICCT commissioned Emissions Analytics, a commercial test house specializing in testing real-world fuel consumption and emissions, to perform on-road testing of Euro 6-regulated gasoline...
Published 2016.11.14: Publication

Reducing vehicle emissions in Turkey

Turkey is one of the largest vehicle manufacturing countries in the world, and the auto industry plays a key role in the Turkish economy. For Turkey, it is of particular importance to ensure that the...
Published 2016.08.17: Publication

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

World-Harmonized Light-Duty Vehicles Test Procedure

On November 14, the formal text for the World-Harmonized Light-Duty Vehicles Test Procedure (WLTP) was adopted by the United Nations Working Party on Pollution and Energy (GRPE). That decision must...
Published 2013.11.22: Publication

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

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

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