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Evaluation of Measurement Procedures for Solid Particle Number (SPN) Measurements during the Periodic Technical Inspection (PTI) of Vehicles

Author

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  • Anastasios Melas

    (European Commission, Joint Research Centre (JRC), 21027 Ispra, Italy)

  • Tommaso Selleri

    (European Commission, Joint Research Centre (JRC), 21027 Ispra, Italy)

  • Ricardo Suarez-Bertoa

    (European Commission, Joint Research Centre (JRC), 21027 Ispra, Italy)

  • Barouch Giechaskiel

    (European Commission, Joint Research Centre (JRC), 21027 Ispra, Italy)

Abstract

Periodic technical inspection (PTI) of vehicles guarantees safety and environmental compliance during their lifetime. Particulate matter emissions of diesel vehicles are controlled with opacity measurements. After the introduction of diesel particulate filters (DPFs), particulate matter emissions have drastically decreased and the sensitivity of the opacity method is questioned. Several countries have already or are planning to introduce a solid particle number (SPN) method at their PTI that will either substitute or complement opacity measurements. However, there are differences in the measurement procedures and the limit values. In this study, we compared the different approaches and investigated topics which are still not well defined, such as the uncertainty of the SPN-PTI instruments, repeatability of the procedures, impact of the DPF fill state, and the correlation between type-approval SPN emissions and SPN concentrations during PTI tests. Finally, we compared the SPN-PTI instruments with the opacity meters. Our results showed that SPN-PTI measurements can detect tampered and defective DPFs. We also made suggestions on the measurement procedures and the concentration limit.

Suggested Citation

  • Anastasios Melas & Tommaso Selleri & Ricardo Suarez-Bertoa & Barouch Giechaskiel, 2022. "Evaluation of Measurement Procedures for Solid Particle Number (SPN) Measurements during the Periodic Technical Inspection (PTI) of Vehicles," IJERPH, MDPI, vol. 19(13), pages 1-17, June.
    • Handle: RePEc:gam:jijerp:v:19:y:2022:i:13:p:7602-:d:844413
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    References listed on IDEAS

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    1. Barouch Giechaskiel & Tero Lähde & Sawan Gandi & Stefan Keller & Philipp Kreutziger & Athanasios Mamakos, 2020. "Assessment of 10-nm Particle Number (PN) Portable Emissions Measurement Systems (PEMS) for Future Regulations," IJERPH, MDPI, vol. 17(11), pages 1-16, May.
    2. Eugenio Fernández & Alicia Valero & Juan José Alba & Abel Ortego, 2021. "A New Approach for Static NOx Measurement in PTI," Sustainability, MDPI, vol. 13(23), pages 1-34, December.
    3. José I. Huertas & Antonio E. Mogro & Alberto Mendoza & María E. Huertas & Rolando Ibarra, 2020. "Assessment of the Reduction in Vehicles Emissions by Implementing Inspection and Maintenance Programs," IJERPH, MDPI, vol. 17(13), pages 1-15, July.
    4. Evangelos G. Giakoumis & Alexandros T. Zachiotis, 2017. "Investigation of a Diesel-Engined Vehicle’s Performance and Emissions during the WLTC Driving Cycle—Comparison with the NEDC," Energies, MDPI, vol. 10(2), pages 1-19, February.
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    Cited by:

    1. Jacopo Franzetti & Tommaso Selleri & Christian Ferrarese & Anastasios Melas & Dario Manara & Barouch Giechaskiel & Ricardo Suarez-Bertoa, 2023. "Assessment of a NOx Measurement Procedure for Periodic Technical Inspection (PTI) of Light-Duty Diesel Vehicles," Energies, MDPI, vol. 16(14), pages 1-11, July.

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