Topics / Worldwide Harmonized Light Vehicles Test Procedure (WLTP)

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Outlines the current procedure for the determination of fuel consumption, carbon dioxide (CO2) emissions, electric energy consumption, and electric range, specifically for PHEVs in Europe, highlights the most relevant changes expected with the introduction of the new Worldwide Harmonized Light Vehicles Test Procedure (WLTP) and discusses key differences between the EU and U.S. test procedures for PHEVs.

Results of a project by the International Centre of Automotive Technology (ICAT), in India, to conduct laboratory and on-road testing of three in-use vehicles, using a portable emissions measurement system, over a variety of drive cycles and routes.

Summarizes results from on-road testing of seven Euro 6-regulated gasoline and diesel vehicles carried out by Emissions Analytics between 2015 and 2016 concerning emissions of carbon monoxide (CO), carbon dioxide (CO2), nitric oxide (NO), nitrogen dioxide (NO2), and particulates.

2017.07.28

Outlines the current procedure for the determination of fuel consumption, carbon dioxide (CO2) emissions, electric energy consumption, and electric range, specifically for PHEVs in Europe, highlights the most relevant changes expected with the introduction of the new Worldwide Harmonized Light Vehicles Test Procedure (WLTP) and discusses key differences between the EU and U.S. test procedures for PHEVs.

Publication: Briefing
2017.06.26

Results of a project by the International Centre of Automotive Technology (ICAT), in India, to conduct laboratory and on-road testing of three in-use vehicles, using a portable emissions measurement system, over a variety of drive cycles and routes.

Publication: Consultant report
2016.11.14

Summarizes results from on-road testing of seven Euro 6-regulated gasoline and diesel vehicles carried out by Emissions Analytics between 2015 and 2016 concerning emissions of carbon monoxide (CO), carbon dioxide (CO2), nitric oxide (NO), nitrogen dioxide (NO2), and particulates.

Publication: Consultant report
2016.08.17

Details how implementing well-tested policy measures can help drive forward the necessary innovations and could reduce the total CO2 emissions of the LDV fleet in Turkey by about 36% compared to a business-as-usual scenario.

Publication: White paper
2014.10.29

Identifies and quantifies impacts on type-approval values of the EU's anticipated transition from the NEDC to the WLTP. Notably, the effects of the new driving cycle and the new definition of vehicle test masses result in a target of 100 g CO2/km for 2020.

Publication: Working paper
2013.11.22

On November 14, the formal text for the WLTP was adopted. If confirmed by the World Forum for Harmonization of Vehicles Regulations, the WLTP will be ready for implementation by individual countries.

Publication: Policy update
2012.11.27

Quantifies the expected effect of tire classification on CO2 as input for a discussion on tire selection in the informal subgroup on the development of the WLTP test procedure.

Publication: Working paper
2012.04.04

This paper compares fuel consumption / CO2 values of passenger cars from different sources and aims at quantifying the discrepancy between laboratory type-approval values and real-world values, including a retrospective analysis for the years 2001-2011 to determine if the gap between the two datasets has increased over time. Potential explanations for the discrepancies found are discussed and possible practical solutions for the future outlined.

Publication: Working paper
2011.10.19

This paper is ICCT’s 4th contribution to the UNECE GRPE informal subgroup on the development of a worldwide harmonized light vehicles test procedure (WLTP-DTP).

Publication: Working paper
2011.10.19

This paper presents new analysis on the implications of the current inertia class based system and outlines two alternative approaches for discussion within the WLTP-DTP working group.

Publication: Working paper

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