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O. Budak, S. Pischinger, K. Heufer, J. Dedl, J. Graf, B. Geringer, U. Kramer:
"Characteristic Fuel Numbers Biofuels II";
Talk: 27. Aachener Kolloquium Fahrzeug- und Motorentechnik 2018, Eurogress Aachen | Germany (invited); 2018-10-08 - 2018-10-10; in: "27. Aachener Kolloquium", RWTH Aachen University, Band I (2018), ISBN: 978-3-00-057468-9; 465 - 498.

The goal of this FVV project is to determine a characteristic number that serves to rate the influence of the fuel on pre-ignition. A distinction is made here between autoignition on a hot surface (glow ignition) and auto-ignition caused by a critical gas phase. With regard to surface-induced pre-ignition (glow ignition), comprehensive analyses have illustrated that flow conditions and thermodynamic operating conditions have a significant influence on glow ignition behavior. Accordingly, none of the test procedures examined does provide a reliable basis for predicting fuel behavior. However, it was possible to identify the influence of hydrocarbons on the glow ignition tendency of a fuel. Based on an adapted CFR engine, it is possible to predict the pre-ignition tendencies of the examined fuels from the gas phase with an accuracy of more than 90%. An alternative measuring procedure was identified in the Advanced Fuel Ignition Delay Analyser (AFIDA), which made it possible to determine the pre-ignition tendency from the gas phase with an accuracy of over
80%.