Effects of Secondary Air on the Exhaust Oxidation of Particulate Matters
Name
7_2015-01-0886 sec air on PMl.pdf
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1.28 MB
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Adobe PDF
Checksum (MD5)
4b2f692ee3ec4e52aa71537ba8959ece
Author(s)
Pritchard, Joseph
Cheng, Wai K.
Date Issued
April 2015
Journal
SAE International Journal of Engines
Publisher
SAE International
Citation
Pritchard, Joseph, and Wai K. Cheng. “Effects of Secondary Air on the Exhaust Oxidation of Particulate Matters.” SAE Int. J. Engines 8, no. 3 (January 20, 2015).
Version
Author's final manuscript
Abstract
The effects of secondary air on the exhaust oxidation of particulate matters (PM) have been assessed in a direct-injection-spark-ignition engine under fuel rich fast idle condition (1200 rpm; 2 bar NIMEP). Substantial oxidation of the unburned feed gas species (CO and HC) and significant reduction of both the particulate number (up to ~80%) and volume (up to ~90%) have been observed. The PM oxidation is attributed to the reactions between the PM and the radicals generated in the oxidation of the feed gas unburned species. This hypothesis is supported by the observation that the reduction in PM volume is proportional to the amount of heat release in the secondary oxidation.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
Sloan Automotive Laboratory
Terms of Use
Creative Commons Attribution-Noncommercial-Share Alike
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.4271/2015-01-0886
