Particle numbers are measured via partial dilution or CVS systems under current emissions regulations. This presentation provides information in support of heavy-duty vehicle/engine manufacturer interest in direct measurement of raw PN emissions. ACEA requests the PMP program to further investigate the feasibility to allow PN raw measurement for HD applications.

Update on PMP informal group member research into non-exhaust (tyre, brake wear) particle emissions.

Working draft summary of the PMP informal group program for the development of a common test procedure for sampling and assessing brake wear particles both in terms of mass and number emissions.

CPC Calibration Round Robin exercise: Proposal for second stage.

Version 4 of the proposal.

Presentation on the consortium researching a methodology for the measurement of particles to about 10 nm and development of a high efficiency PN-Portable Emission Measurement System (PEMS) demonstrator.

Testing of ECE (European) and NAO (North American) brake pads, including copper-free variants, for particle emissions.

SUREAL-23 program work package schedule. The SUREAL-23 project is developing novel nanoparticle concentration/size/composition measurement instrumentation, with special focus on the ultrafine nanoparticles emitted by internal combustion engines. The goal of the project is to quantitatively and qualitatively assess nanoparticle emissions of less than 23 nm and down to 1nm in size, in order to facilitate future emission regulations as well as to assess any potential trade-offs between advances in engine technology, efficiency and emissions.