Proposal from the Particle Measurement Programme informal group to:

• Modify the existing solid PN measurement methodology having a 50% cut-off size at 23 nm (SPN23) in order to allow the use of catalyzed volatile particle remover (VPR) and introduce minor improvements, and
• Include as a second option a solid PN measurement methodology with a 65% cut-off size at 10 nm (SPN10).

Proposal to update the PMP mandate with a view to delivering the following results:

• Proposal for a new methodology for exhaust PN measurement with a d50 cut-off size reduced to 10 nm: June 2020
• Proposal for HD raw exhaust PN sampling and extension of sub-23 nm procedure to HD engines: January 2021
• Proposal for LD PN-PEMS 10 nm specifications : June 2021 (tbc)
• Proposal for a common test procedure for the measurement of particle brake emissions from conventional ICE LDVs: December 2021.

Document also available in PDF and word versions with track changes
http://www.unece.org/fileadmin/DAM/trans/doc/2020/wp29grpe/GRPE-81-14e_track.pdf
http://www.unece.org/fileadmin/DAM/trans/doc/2020/wp29grpe/GRPE-81-14e_track.docx