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. Author manuscript; available in PMC: 2023 Apr 2.
Published in final edited form as: Appl Sci (Basel). 2022 Apr 2;12(7):1–52. doi: 10.3390/app12073623

Table 7.

Summary of recommendations regarding PM carbonaceous species and UFP for post-Euro 6 standards from ICCT [44].

Limits

  • Introduce fuel- and technology-neutral emission limits

  • Tighten the emission limits to harmonize with other markets

  • Introduce application-neutral emission limits
Ultrafine particles

  • Lower the size cut-off for particle counting from 23 nm to at least 10 nm

  • Develop a methodology to measure volatile and semi-volatile particles

  • Include emissions that occur during filter regeneration

  • Make particulate number (PN) standards fuel and technology neutral

  • Investigate the feasibility of PN tailpipe measurements
Unregulated pollutants

  • Set limits for aldehyde emissions

  • Regulate all VOCs and not just HC

  • Set emission limits for brake wear particles