High-Speed Multiplexed Spatiotemporally Resolved Measurements of Exhaust Gas Recirculation Dynamics in a Multi-Cylinder Engine Using Laser Absorption Spectroscopy

Journal Article · Fri Apr 01 00:00:00 EDT 2016 · Applied Spectroscopy

DOI:https://doi.org/10.1177/0003702816636802· OSTI ID:1247933

Yoo, Jihyung ^[1]; Prikhodko, Vitaly ^[1]; Parks, James E. ^[1]; Perfetto, Anthony ^[2]; Geckler, Sam ^[3]; Partridge, William P. ^[1]

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1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Fuels, Engines, and Emissions Research Center
2. Cummins Inc.,Columbus, IN (United States). Cummins Technical Center
3. Cummins Inc.,Columbus, IN (United States). Cummins Technical Cente

The need for more environmentally friendly and efficient energy conversion is of paramount importance in developing and designing next-generation internal combustion (IC) engines for transportation applications. One effective solution to reducing emissions of mono-nitrogen oxides (NO_x) is exhaust gas recirculation (EGR), which has been widely implemented in modern vehicles. However, cylinder-to-cylinder and cycle-to-cycle variations in the charge-gas uniformity can be a major barrier to optimum EGR implementation on multi-cylinder engines, and can limit performance, stability, and efficiency. Precise knowledge and fine control over the EGR system is thus crucial, particularly for optimizing advanced engine concepts such as reactivity controlled compression ignition (RCCI). An absorption-based laser diagnostic was developed to study spatiotemporal charge-gas distributions in an IC engine intake manifold in real-time. The laser was tuned to an absorption band of carbon dioxide (CO₂), a standard exhaust-gas marker, near 2.7 µm. The sensor was capable of probing four separate measurement locations simultaneously, and independently analyzing EGR fraction at speeds of 5 kHz (1.2 crank-angle degree (CAD) at 1 k RPM) or faster with high accuracy. Lastly, the probes were used to study spatiotemporal EGR non-uniformities in the intake manifold and ultimately promote the development of more efficient and higher performance engines.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Fuels, Engines and Emissions Research Center (FEERC)
• Sponsoring Organization: USDOE Office of Energy Efficiency and Renewable Energy (EERE)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1247933
• Journal Information: Applied Spectroscopy, Vol. 70, Issue 4; ISSN 0003-7028
• Publisher: Society for Applied Spectroscopy
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
EGR Probe
EGR
CO₂
CO
Measurement
diagnostics
engine
emissions
absorption
combustion
uniformity