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Gas Temperature Measurements During Ignition in an HCCI Engine
Technical Paper
2003-01-0744
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Bulk gas temperature in an HCCI engine was measured using a novel optical sensing technique. A wavelength-agile absorption sensor using a fiber-coupled LED was used to measure the in-cylinder gas temperature. H2O absorption spectra spanning 1380-1420nm were recorded once every 63 μs using this sensor. The gas temperature was inferred from a least-squares fit of the integrated absorbance areas of H2O absorption features in this spectral region to those from simulated spectra. The primary source of the H2O was the humidity in the intake air. Measurements were made during the compression and early portion of the combustion phase of an n-heptane fueled HCCI engine. The measured pressure-temperature history was compared to kinetic calculations of the ignition delay, and showed the traversal of the negative temperature coefficient regime.
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Citation
Sanders, S., Kim, T., and Ghandhi, J., "Gas Temperature Measurements During Ignition in an HCCI Engine," SAE Technical Paper 2003-01-0744, 2003, https://doi.org/10.4271/2003-01-0744.Also In
Homogeneous Charge Compression Ignition (Hcci) Combustion 2003
Number: SP-1742; Published: 2003-03-03
Number: SP-1742; Published: 2003-03-03
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