An Efficient Thermodynamic Cycle Analysis for the Performance Prediction of Fuel Inducted Spark Ignition Engines

Parametric combustion modeling for ethanol-gasoline fuelled spark ignition engines

“…The burn duration was previously assumed to be a function of cylinder geometry and turbulent flame speed which are a function of engine speed and laminar flame speed only [11]. The burn duration was also correlated as a function of compression ratio, engine speed, equivalence ratio, and the spark timing [28].…”

“…Several empirical burn duration correlations as a function of engine operating condition have been proposed. The computed burn duration from measured pressure trace were correlated to the engine operating conditions in forms including polynomial [11], combination polynomial and product form [27][28][29], product-power form [30][31][32], etc.…”

“…In those previous studies, six physically based parameters have been selected based on references [3,10,30,31] equivalence ratio, engine speed, engine load, and valve timing [3,11,27,28].…”

“…Over the years, many researchers have developed combustion models based on mean or median cycle that are applicable to one-dimensional engine simulation by defining the burning rates of fuel-air mixtures based on the First Law of Thermodynamics [5][6][7][8]. The burning rates of the fuel air mixture can also be described as function of engine geometry and in-cylinder conditions, fuel air mixture properties and flame speed [9][10][11][12]. The burning rate is commonly expressed using the mass fraction burned (MFB), a normalized integral of burning rate, which has a characteristic S-shaped curve.…”