Jove
Visualize
Contact Us

Related Experiment Video

Updated: Jun 13, 2026

Measuring Sub-23 Nanometer Real Driving Particle Number Emissions Using the Portable DownToTen Sampling System
08:59

Measuring Sub-23 Nanometer Real Driving Particle Number Emissions Using the Portable DownToTen Sampling System

Published on: May 22, 2020

Diesel particle mass concentration by optical techniques.

D M Roessler1

  • 1General Motors Research Laboratories, Physics Department, Warren, Michigan 48090-9055, USA.

Applied Optics
|April 20, 2010
PubMed
Summary

This study measured Diesel engine exhaust particles using opacity and photoacoustic methods. Both techniques accurately recorded real-time emissions during driving cycles, with low uncertainties for mass concentration measurements.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Optical absorption in thin slabs and spherical particles.

Applied optics·2010
Same author

Photoacoustic determination of optical absorption to extinction ratio in aerosols.

Applied optics·2010
Same author

Opacity of black smoke: calculated variation with particle size and refractive index: erratum.

Applied optics·2010
Same author

Opacity of black smoke: calculated variation with particle size and refractive index.

Applied optics·2010
Same author

Carbon aerosol visibility vs particle size distribution.

Applied optics·2010
Same author

Reflectivity of steel at 10.6-microm wavelength.

Applied optics·2010
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Area of Science:

  • Environmental Science
  • Mechanical Engineering
  • Analytical Chemistry

Background:

  • Diesel engines produce particulate matter, a significant air pollutant.
  • Accurate measurement of these particles is crucial for environmental regulation and engine development.

Purpose of the Study:

  • To compare the effectiveness of visible wavelength opacity meters and IR photoacoustic devices for measuring Diesel exhaust particle mass concentrations.
  • To assess the real-time emission recordings of vehicles during the Federal Test Procedure (FTP) driving cycle.

Main Methods:

  • Utilized a visible wavelength opacity meter and an IR photoacoustic device to measure particle mass concentrations.
  • Recorded real-time exhaust emissions from Diesel vehicles operating over the FTP driving cycle.

Main Results:

  • Steady-state mass concentrations were measurable, with opacity meters detecting a few mg x m(-3) and photoacoustic devices detecting as low as 0.4 mg x m(-3).
  • Both methods exhibited an uncertainty of approximately 15% for steady-state measurements.
  • Integration of optical signals over the FTP cycle resulted in an estimated total mass emission rate uncertainty of approximately 20%.

Conclusions:

  • Visible wavelength opacity meters and IR photoacoustic devices are viable tools for real-time measurement of Diesel exhaust particle mass.
  • The study provides valuable data on the uncertainties associated with these measurement techniques during dynamic driving conditions.

More Related Videos

Measurement of Particle Size Distribution in Turbid Solutions by Dynamic Light Scattering Microscopy
09:16

Measurement of Particle Size Distribution in Turbid Solutions by Dynamic Light Scattering Microscopy

Published on: January 9, 2017

Additive Manufacturing-Enabled Low-Cost Particle Detector
06:05

Additive Manufacturing-Enabled Low-Cost Particle Detector

Published on: March 24, 2023

Related Experiment Videos

Last Updated: Jun 13, 2026

Measuring Sub-23 Nanometer Real Driving Particle Number Emissions Using the Portable DownToTen Sampling System
08:59

Measuring Sub-23 Nanometer Real Driving Particle Number Emissions Using the Portable DownToTen Sampling System

Published on: May 22, 2020

Measurement of Particle Size Distribution in Turbid Solutions by Dynamic Light Scattering Microscopy
09:16

Measurement of Particle Size Distribution in Turbid Solutions by Dynamic Light Scattering Microscopy

Published on: January 9, 2017

Additive Manufacturing-Enabled Low-Cost Particle Detector
06:05

Additive Manufacturing-Enabled Low-Cost Particle Detector

Published on: March 24, 2023