Abstract
Since 2011, the Euro 5b European standard limits the particle number (PN) emissions in addition to the particulate mass (PM) emissions. New thermal engine equipped vehicles also have to auto-diagnose their own particulate filter (Diesel particulate filter or gasoil particulate filter) using on-board diagnostic (OBD) sensors. Accumulative resistive soot sensors seem to be good candidates for PM measurements. The aim of this study is to bring more comprehension about soot microstructures construction in order to link the response of such a sensor to particle size and concentration. The sensor sensitivity to the particle size has been studied using successively an electrostatic and an aerodynamic classification, showing the same trend.
Highlights
The soot nanoparticle emissions from thermal engines have a harmful impact on human health.Because of their small size, they deeply penetrate our breathing apparatus to reach our lungs and pulmonary alveoli
The aim of this study was to investigate the sensitivity of a resistive soot sensor response to the particle size
The physical principle of the DMA led to low concentration aerosols (
Summary
The soot nanoparticle emissions from thermal engines have a harmful impact on human health. Because of their small size, they deeply penetrate our breathing apparatus to reach our lungs and pulmonary alveoli. A pressure sensor ( called Delta P sensor) measures the pressure loss induced by the particulate matter accumulation in the particulate filter [2]. It seems that this device is not accurate enough to detect the particulate filter leaks [3] which can cause a significant increase of tailpipe emissions
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