Abstract
The European Metrology Research Programme participating countries and the European Union jointly fund a three year project to address the need of the automotive industry for a metrological sound base for exhaust measurements. The collaborative work on particle emissions involves five European National Metrology Institutes, the Tampere University of Technology, the Joint Research Centre for Energy and Transport and the Leibniz Institute for Tropospheric Research. On one hand, a particle number and size standard for soot particles is aimed for. Eventually this will allow the partners to provide accurate and comparable calibrations of measurement instruments for the type approval of Euro 5b and Euro 6 vehicles. Calibration aerosols of combustion particles, silver and graphite proof partially suitable. Yet, a consensus choice together with instrument manufactures is pending as the aerosol choice considerably affects the number concentration measurement. Furthermore, the consortium issued consistent requirements for novel measuring instruments foreseen to replace today’s opacimeters in regulatory periodic emission controls of soot and compared them with European legislative requirements. Four partners are conducting a metrological validation of prototype measurement instruments. The novel instruments base on light scattering, electrical, ionisation chamber and diffusion charging sensors and will be tested at low and high particle concentrations. Results shall allow manufacturers to further improve their instruments to comply with legal requirements.
Highlights
The pollution of particles from automotive-emissions is of particular significance as modern engines with highpressure injection emit a large amount of very very fine particles
The European Metrology Research Programme participating countries and the European Union jointly fund a three year project to address the need of the automotive industry for a metrological sound base for exhaust measurements
They are regarded dangerous for people; in 2012 the World Health Organisation (WHO) classified diesel engine exhaust as carcinogenic to humans.[1]
Summary
The pollution of particles from automotive-emissions is of particular significance as modern engines with highpressure injection emit a large amount of very very fine particles They are regarded dangerous for people; in 2012 the World Health Organisation (WHO) classified diesel engine exhaust as carcinogenic to humans.[1] In order to ensure that emissions of ultrafine particulate pollutants (PM 0.1 μm and below) can be controlled, the European Commission has introduced a number-based limit value in addition to the mass-based limit value for type approval of Euro 5b and Euro 6 engines.[2] The particle number measurements follow the procedures described in the vehicle emission regulations UN-ECE R49 and R83.[3,4]. Two of the four technical work packages aim to establish the metrological base for particle emissions in exhaust gases of diesel vehicles in Europe. With the decreasing particle diameters the today’s established measuring method of opacity becomes insufficient for accurate legal measurements
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