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EGR distribution and fluctuation probe based on CO.sub.2 measurements

Patent ·
OSTI ID:1177510
; ;
A diagnostic system having a single-port EGR probe and a method for using the same. The system includes a light source, an EGR probe, a detector and a processor. The light source may provide a combined light beam composed of light from a mid-infrared signal source and a mid-infrared reference source. The signal source may be centered at 4.2 .mu.m and the reference source may be centered at 3.8 .mu.m. The EGR probe may be a single-port probe with internal optics and a sampling chamber with two flow cells arranged along the light path in series. The optics may include a lens for focusing the light beam and a mirror for reflecting the light beam received from a pitch optical cable to a catch optical cable. The signal and reference sources are modulated at different frequencies, thereby allowing them to be separated and the signal normalized by the processor.
Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC05-00OR22725
Assignee:
UT-Battelle, LLC (Oak Ridge, TN)
Patent Number(s):
9,000,374
Application Number:
13/912,462
OSTI ID:
1177510
Country of Publication:
United States
Language:
English

References (2)

High-speed laser-induced fluorescence and spark plug absorption sensor diagnostics for mixing and combustion studies in engines journal December 2008
Advanced Laser Imaging Diagnostics in Combustion journal May 2005

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