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Volkswagen video explains the stricter WLTP test procedure
Video explains elements including the mobile exhaust gas measurement laboratory for on-site measurements of customer vehicles.
06/20/19
Wolfsburg (Germany)
Models
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Volkswagen video explains the stricter WLTP test procedure

  • The next stage of the WLTP (Worldwide Harmonized Light Vehicles Test Procedure) requires numerous changes to the type approval process
  • Extended test procedure also involves tests during customer operation up to a mileage of 100,000 kilometres
  • Additional tightening of the measures is planned for the coming years

Euro 6d TEMP EVAP ISC – this is the complicated name of the emission standard that will be mandatory for all newly registered vehicles with the second stage of the WLTP type test from 1 September 2019. The WLTP procedure introduced last year will be further tightened by new technical requirements and the technical procedures involved in type testing will be increased yet further. Volkswagen explains the main innovations in a video (https://youtu.be/lZXdQYSF1Gk).

In this process, the abbreviation "EVAP" (evaporative emissions) stands for the verification of evaporative emissions. An activated charcoal filter in the tank system already prevents petrol vapours from being released into the environment of Volkswagen models. In the past, this was tested in an airtight chamber for 24 hours. In the future, however, the period will be 48 hours – at constant limit values. The vehicles will be retrofitted with technology to meet these additional requirements.

Another major change with the second WLTP stage is the measurement of whether the emission limits are still met during vehicle operation. In future, vehicles up to five years old will be subjected to a random WLTP test. This field monitoring (ISC = InServiceConformity) is carried out on selected vehicles with a mileage of up to 100,000 kilometres. Volkswagen also uses a mobile exhaust gas measurement laboratory for on-site measurements of customer vehicles.

The first WLTP stage came into force for all new vehicles on 1 September 2018. The fact that the next stage follows just one year later – and there will be others – is due to the procedure's high complexity. The regulations, which will come into force in September 2019, also contain details about the previous procedure and thus provide legal certainty.

The Volkswagen video explains the main changes to the WLTP cycle, which will be mandatory from September 2019: https://youtu.be/lZXdQYSF1Gk

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The specified fuel consumption and emission data are determined in accordance with the measurement procedures prescribed by law. 1 January 2022, the WLTP test cycle completely replaced the NEDC test cycle and therefore no NEDC values are available for new type approved vehicles after that date.

This information does not refer to a single vehicle and is not part of the offer but is only intended for comparison between different types of vehicles. Additional equipment and accessories (additional components, tyre formats, etc.) can alter relevant vehicle parameters such as weight, rolling resistance and aerodynamics, affecting the vehicle's fuel consumption, power consumption, CO2 emissions and driving performance values in addition to weather and traffic conditions and individual driving behavior.

Due to more realistic testing conditions, fuel consumption and CO2 emissions measured according to WLTP will in many cases be higher than the values measured according to NEDC. As a result, the taxation of vehicles may change accordingly as of 1 September 2018. For further information on the differences between WLTP and NEDC, please visit www.volkswagen.de/wltp.

Further information on official fuel consumption data and official specific CO2 emissions for new passenger cars can be found in the "Guide to fuel economy, CO2 emissions and power consumption for new passenger car models", which is available free of charge from all sales dealerships and from DAT Deutsche Automobil Treuhand GmbH, Hellmuth-Hirth-Str. 1, D-73760 Ostfildern, Germany and at www.dat.de/co2.