Development of an On-Board PM Sensor for the OBD System Based on an Electrochemical Polarization

Event
SAE International Powertrains, Fuels and Lubricants Meeting
Authors Abstract
Content
An on-board particulate matter (PM) sensor, consisting of a gas-permeable electrochemical cell with a porous yttria-stabilized zirconia solid oxide electrolyte, was developed to assist the on-board diagnostics (OBD) system of a vehicle. Exhaust is pumped from the anode side to the cathode side and PM deposited on the anode is instantly oxidized by the catalytic effects of the metal component of the electrode at temperatures higher than 350°C. The PM oxidation reaction occurs at the three-phase boundary between the anode, electrolyte and gas phase, and causes a slight change in the bulk average oxygen concentration, which produces electrochemical polarization by the difference in oxygen partial pressures between the anode and cathode. The developed PM sensor has a detection limit of 2 mg/m₃, at which level will enable PM detection in the OBD system according to the EURO VI regulation.
Meta TagsDetails
DOI
https://doi.org/10.4271/2011-01-2059
Pages
6
Citation
Yoshihara, Y., Suzuki, T., Tominaga, K., Aoki, K. et al., "Development of an On-Board PM Sensor for the OBD System Based on an Electrochemical Polarization," SAE Int. J. Fuels Lubr. 5(1):337-342, 2012, https://doi.org/10.4271/2011-01-2059.
Additional Details
Publisher
Published
Aug 30, 2011
Product Code
2011-01-2059
Content Type
Journal Article
Language
English