2-D Temperature Measurements of Unburned Gas Mixture in an Engine by Two-line Excitation LIF Technique

2006-01-3336

10/16/2006

Event
Powertrain & Fluid Systems Conference and Exhibition
Authors Abstract
Content
Two-line excitation LIF (Laser-Induced Fluorescence) technique for 2-dimensional temperature measurements in an engine cylinder before ignition is presented. From the fundamental examinations, the combination of toluene tracer with a pair of excitation lines of 248nm and 266nm has been selected because of the high LIF intensity ratio and closer excitation wavelengths. In-cylinder thermometry is conducted using a visualized single cylinder spark ignition engine both in PFI (port-fuel-injection) and DI (direct-injection) operation. The accuracy of this technique is determined through the homogeneous PFI experiment. Temperature and fuel distribution in unburned mixture are measured simultaneously in DI operation. It exists a strong correlation between equivalence ratio and temperature inside the mixture. Temperature in the fuel rich region is lower than in the fuel lean region. Referring the measured temperature results, equivalence ratio in the mixture is corrected for the temperature effect on LIF intensity.
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DOI
https://doi.org/10.4271/2006-01-3336
Pages
12
Citation
Fujikawa, T., Fukui, K., Hattori, Y., and Akihama, K., "2-D Temperature Measurements of Unburned Gas Mixture in an Engine by Two-line Excitation LIF Technique," SAE Technical Paper 2006-01-3336, 2006, https://doi.org/10.4271/2006-01-3336.
Additional Details
Publisher
Published
Oct 16, 2006
Product Code
2006-01-3336
Content Type
Technical Paper
Language
English