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jeudi, avril 3, 2025
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    Volkswagen video explains the stricter WLTP test procedure

    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.

    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: 

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    Faris Bouchaala
    Faris Bouchaala
    Journaliste Automobile - Rédacteur en Chef Adjoint
    Grand passionné d’automobile depuis mon enfance, mon objectif au quotidien était de trouver le moyen d'arracher le volant à mon père. Très peu de gens ont la possibilité de transformer leur passion en une carrière, et il se trouve que je suis l'un de ces quelques privilégiés. J’ai rejoint la presse spécialisée en 2010, après un parcours totalement loin du domaine, car au final c’est la passion qui l’emporte.

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