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Proceedings Paper

Flexfuel vehicle alcohol-gasoline blend ratio determination by optical fiber sensoring
Author(s): Rafael T. Takeishi; Edmilton Gusken; Klaus Raizer; Henrique G. E. de Souza; Bernardo M. Meirelles; José L. Giacomassi; Gustavo C. Lucio; Carlos K. Suzuki
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Paper Abstract

The high efficiency combustion of flexfuel engine depends on the precise determination of the alcohol-gasoline ratios. Presently, commercial technique available uses the Lambda probe, a post-combustion sensor to analyze the exhaust gases (after combustion). This ratio can be measured in real-time using an optical fiber sensor. In the present research, different ratios of alcohol-gasoline blends were measured at temperatures in the range 0 to 50°C, by a Fresnel reflectometer. The sensoring principle is based on the phenomenon of light reflectivity in the interface fiber-fuel. The reflected intensity is proportional to the refractive index difference between the fiber sensor and the fuel, while the refractive index of the mixture is a function of the volumetric ratio of the substances. The real time determination of the mixture ratio of alcohol-gasoline concentrations by the reflected intensity can be used to optimize the combustion efficiency of the flexfuel engine. It can be expected that this technology can reduce both, the pollutant emissions and the fuel consumption.

Paper Details

Date Published: 16 May 2008
PDF: 4 pages
Proc. SPIE 7004, 19th International Conference on Optical Fibre Sensors, 70044F (16 May 2008); doi: 10.1117/12.786049
Show Author Affiliations
Rafael T. Takeishi, UNICAMP - The State Univ. of Campinas (Brazil)
Edmilton Gusken, UNICAMP - The State Univ. of Campinas (Brazil)
Klaus Raizer, UNICAMP - The State Univ. of Campinas (Brazil)
Henrique G. E. de Souza, UNICAMP - The State Univ. of Campinas (Brazil)
Bernardo M. Meirelles, UNICAMP - The State Univ. of Campinas (Brazil)
José L. Giacomassi, Click Automotiva Industrial Ltda SA (Brazil)
Gustavo C. Lucio, Click Automotiva Industrial Ltda SA (Brazil)
Carlos K. Suzuki, UNICAMP - The State Univ. of Campinas (Brazil)


Published in SPIE Proceedings Vol. 7004:
19th International Conference on Optical Fibre Sensors

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