High Speed H 2 O Concentration Measurements Using Absorption Spectroscopy to Monitor Exhaust Gas

2009-01-0239

04/20/2009

Event
SAE World Congress & Exhibition
Authors Abstract
Content
This paper demonstrates the potential for fast absorption spectroscopy measurements in diesel-engine exhaust to track H2O concentration transients. Wavelength-agile absorption spectroscopy is an optical technique that measures broadband absorption spectra between 10 kHz and 100 MHz. From these measured spectra, gas temperature and absorber concentrations can be determined.
We introduce a laser spectroscopy system for high speed (10 μs) diesel exhaust measurements in the presence of significant particulate matter. The sensor can be broadly applicable for understanding the dynamics of EGR distribution, cycle-to-cycle stability, cylinder-to-cylinder charge uniformity, and NOX regeneration strategies. The method precision is 10% and 5%, for individual 10-μs measurements and 2-ms averaged measurements, respectively. The sensitivity or detection limit of the measurement is 0.5% H2O.
Meta TagsDetails
DOI
https://doi.org/10.4271/2009-01-0239
Pages
8
Citation
Kranendonk, L., Parks, J., Prikhodko, V., and Partridge, W., "High Speed H 2 O Concentration Measurements Using Absorption Spectroscopy to Monitor Exhaust Gas," SAE Technical Paper 2009-01-0239, 2009, https://doi.org/10.4271/2009-01-0239.
Additional Details
Publisher
Published
Apr 20, 2009
Product Code
2009-01-0239
Content Type
Technical Paper
Language
English