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Title: EGR distribution and fluctuation probe based on CO2 measurements

Abstract

A diagnostic system having a laser, an EGR probe, a detector and a processor. The laser may be a swept-.lamda. laser having a sweep range including a significant CO.sub.2 feature and substantially zero absorption regions. The sweep range may extend from about 2.708 .mu.m to about 2.7085 .mu.m. The processor may determine CO.sub.2 concentration as a function of the detector output signal. The processor may normalize the output signal as a function of the zero absorption regions. The system may include a plurality of EGR probes receiving light from a single laser. The system may include a separate detector for each probe. Alternatively, the system may combine the light returning from the different probes into a composite beam that is measured by a single detector. A unique modulation characteristic may be introduced into each light beam before combination so that the processor can discriminate between them in the composite beam.

Inventors:
; ;
Issue Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1187942
Patent Number(s):
9,068,933
Application Number:
14/051,788
Assignee:
UT-Battelle, LLC (Oak Ridge, TN)
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Patent
Resource Relation:
Patent File Date: 2013 Oct 11
Country of Publication:
United States
Language:
English
Subject:
33 ADVANCED PROPULSION SYSTEMS; 36 MATERIALS SCIENCE

Citation Formats

Parks, II, James E., Partridge, Jr., William P., and Yoo, Ji Hyung. EGR distribution and fluctuation probe based on CO2 measurements. United States: N. p., 2015. Web.
Parks, II, James E., Partridge, Jr., William P., & Yoo, Ji Hyung. EGR distribution and fluctuation probe based on CO2 measurements. United States.
Parks, II, James E., Partridge, Jr., William P., and Yoo, Ji Hyung. Tue . "EGR distribution and fluctuation probe based on CO2 measurements". United States. https://www.osti.gov/servlets/purl/1187942.
@article{osti_1187942,
title = {EGR distribution and fluctuation probe based on CO2 measurements},
author = {Parks, II, James E. and Partridge, Jr., William P. and Yoo, Ji Hyung},
abstractNote = {A diagnostic system having a laser, an EGR probe, a detector and a processor. The laser may be a swept-.lamda. laser having a sweep range including a significant CO.sub.2 feature and substantially zero absorption regions. The sweep range may extend from about 2.708 .mu.m to about 2.7085 .mu.m. The processor may determine CO.sub.2 concentration as a function of the detector output signal. The processor may normalize the output signal as a function of the zero absorption regions. The system may include a plurality of EGR probes receiving light from a single laser. The system may include a separate detector for each probe. Alternatively, the system may combine the light returning from the different probes into a composite beam that is measured by a single detector. A unique modulation characteristic may be introduced into each light beam before combination so that the processor can discriminate between them in the composite beam.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2015},
month = {6}
}

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Works referenced in this record:

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  • Cundy, Michael; Schucht, Torsten; Thiele, Olaf
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