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Influence Factors on Calibration of Solid Particle Number Counting System for European PN Emission Regulations
Technical Paper
2011-08-0359
Sector:
Language:
Japanese
Abstract
The European Union has announced the next term emission regulations for light-duty vehicles, Euro 5 and 6, which include particle number (PN) emission standards. The PN counting method for the regulation is described in UNECE Regulation No.83. The required PN counting system consists of a Volatile Particle Remover (VPR) and a Condensation Particle Counter (CPC). The regulations also require calibrating the Particle Concentration Reduction Factor (PCRF) in VPR periodically. Since PCRF is directly used in calculation of total amount of PN emission, the improper calibration of the factor can cause a large uncertainty of PN emission measurement. This paper investigates propriety to use NaCl particles generated by atomizing method in PCRF calibration as reference particles.