C7.1 - Onboard determination of fuel stability in plug-in hybrid diesel cars by dielectric relaxation spectroscopy
- AMA Conferences 2015
2015-05-19 - 2015-05-21
- Proceedings SENSOR 2015
- C7 - Automotive Sensors
- 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)
- 463 - 468
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.