(Brussels. 20/03/2023) The European Commission yesterday published a recommendation containing guidelines for particle number ("PN") concentration testing during periodic technical inspection ("PTI").
Based on existing methods developed by certain Member States, the findings of laboratory tests carried out by the Joint Research Centre of the Commission as well as a consultation of the Commission’s Roadworthiness Expert Group, this paper represents a first step towards harmonised PN measurement during roadworthiness testing.
This Commission’s recommendation defines requirements related to the PN measuring equipment and procedure, metrological and technical requirements, and recommends a pass/fail limit. The guidelines should be applied to all M and N category vehicles equipped with compression ignition engines and diesel particulate filters:
- on light-duty vehicles first registered as of 1 January 2013 (Euro 5b and newer)
- on heavy-duty vehicles first registered as of 1 January 2014 (Euro VI and newer)