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C7.1 - Onboard determination of fuel stability in plug-in hybrid diesel cars by dielectric relaxation spectroscopy

Event
AMA Conferences 2015
2015-05-19 - 2015-05-21
Nürnberg, Germany
Band
Proceedings SENSOR 2015
Chapter
C7 - Automotive Sensors
Author(s)
M. Eskiner, F. Bär, J. Krahl, M. Rossner - University of Applied Sciences and Arts, Coburg (Germany), A. Munack - Thünen Institute of Agricultural Technology (TI), Braunschweig (Germany)
Pages
463 - 468
DOI
10.5162/sensor2015/C7.1
ISBN
978-3-9813484-8-4
Price
free

Abstract

A method based on dielectric relaxation spectroscopy (DRS) is introduced for determination of fuel quality of biodiesel containing fuels in plug-in hybrid electric vehicles (PHEV). Dielectric parameters such as the real and imaginary part of permittivity were recorded in a broad frequency range. As capacitive cell for determining the real and imaginary part of the permittivity, a small-sized interdigital capacitor was developed, which could be integrated into PHEV in the future. Especially in plug-in hybrid cars the storage time of fuel in the fuel tank is expected to be significantly longer than for cars with conventional combustion engines. Therefore the fuel long-term stability is of particular importance. By means of DRS, high-molecular oxidation products, such as oligomers from biodiesel that are considered as precursors for deposits can be detected easily.

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