Marcel Eberbach provides insight into the investigations of the knocking
behavior of methane-based fuels and compares them with the knocking
behavior of very high knock resistant liquid fuels during engine
combustion. With pressure-based knock detection algorithms and
thermodynamic evaluation, the atypical knocking combustion phenomena are
evaluated with respect to the abnormalities on the heat release curve.
Based on the investigated fuels an engine specific relation between the
fuel index numbers (RON and MN) and the actual knock resistance of the
fuels by means of the motor methane number was established and applied
to the investigated gaseous and liquid fuels during knocking combustion.