Worldwide Harmonized Light-duty Test Procedures (WLTP)

Aim

The WLTP aims to establish a worldwide test procedure to measure light vehicle emissions and energy consumption.

Scope

The initial focus is on establishing a harmonized driving cycle (DHC) and test procedure (DTP). In order to support rule-making underway in the EU, it will also address off-cycle emissions (OCE) and be finalized in 2013. In addition, an associated parallel effort will address mobile air conditioning (MAC) systems towards establishing a UNECE rule.

Regulations governing the emissions and fuel consumption from light duty vehicles have existed for many years, but the test cycles and measurement methods vary significantly from one country to another. To determine with accuracy the impact of a light duty vehicle on the environment in terms of its exhaust pollutant emissions as well as the efficient use of energy, it is desirable that as many countries as possible use the same technical regulations.

TSS contribution to the project

Test Site Sweden has been commissioned by Swedish Transport Administration (Trafikverket) to assemble data from vehicles driven in Sweden, both passenger cars and light trucks. This data has been collected with the help of the municipality company Gatubolaget in Gothenburg and is used as the Nordic contribution in the project. The data collected in Sweden will be transfered to the TSS Vehicle Research Database. 

The data in the project is analyzed by the Joint Research Centre (JRC) at the European Comission.