Sampling of Non-Volatile Vehicle Exhaust Particles: A Simplified Guide

Paper #:
  • 2012-01-0443

Published:
  • 2012-04-16
Citation:
Giechaskiel, B., Arndt, M., Schindler, W., Bergmann, A. et al., "Sampling of Non-Volatile Vehicle Exhaust Particles: A Simplified Guide," SAE Int. J. Engines 5(2):379-399, 2012, https://doi.org/10.4271/2012-01-0443.
Pages:
21
Abstract:
Recently, a particle number (PN) limit was introduced in the European light-duty vehicles legislation. The legislation requires measurement of PN, and particulate mass (PM), from the full dilution tunnel with constant volume sampling (CVS). Furthermore, PN measurements will be introduced in the next stage of the European Heavy-Duty regulation. Heavy-duty engine certification can be done either from the CVS or from a partial flow dilution system (PFDS). For research and development purposes, though, measurements are often conducted from the raw exhaust, thereby avoiding the high installation costs of CVS and PFDS. Although for legislative measurements requirements exist regarding sampling and transport of the aerosol sample, such requirements do not necessarily apply for raw exhaust measurements. Thus, measurement differences are often observed depending on where in the experimental set up sampling occurs.The objective of this paper is to summarize and discuss particle loss mechanisms. Simple equations are given for the most important mechanisms. Topics like isokinetic sampling and agglomeration are discussed for various typical cases. Special emphasis is placed on thermophoretic losses since thermophoresis is the most important particle removal mechanism for raw exhaust sampling from modern engines. Sampling from high pressure exhaust gas is also mentioned, and comparisons of the effect of tubing materials on particle removal are carried out. Finally, expected losses for typical cases are shown.
Access
Now
SAE MOBILUS Subscriber? You may already have access.
Buy
Select
Price
List
Download
$28.00
Mail
$28.00
Members save up to 42% off list price.
Share
HTML for Linking to Page
Page URL

Related Items

Event
2018-04-10
Training / Education
2005-11-15
Technical Paper / Journal Article
2011-08-30
Training / Education
2009-12-15
Training / Education
2007-03-01