An engine combustion exhaust gas measuring method of the number of particles

The present invention relates to the field measured, the measurement method is proposed an exhaust of the engine combustion engine ignition method or a compression-ignited engine exhaust the number of particles for measuring a particle of the present invention, comprising mainly collected particle sample to be tested, the test particles dispersion treatment of the sample, obtained electron microscope images of dispersed particles, determining the degree of dispersion of agglomerated particles, and the number of inflection point is the number of arc length, the number of inflection exclude excessive arc length and the number of particles, the number of individual particles is determined Mi and other steps, the finally obtained number of engine combustion exhaust particulate Nsum. Comparative hexyl art, the present invention has a simple measuring device, the number of particles does not need to be obtained by transformation of current characteristics can be intuitively obtained the number of particles.