Modeling of SI engine for duel fuels of hydrogen, gasoline and methane with port injection feeding system

摘要

This paper develops one dimensional performance model for duel fuels SI engine with port injection feeding system. The hydrogen, gasoline and methane are considered as pre fuels in this study. The aim of this model was to compare the performance of hydrogen fuel with the other fuels; and to investigate the power and performance penalty when adding different fractions of hydrogen fuel to the other fuels. A validation test rig using Yamaha FZ150 single cylinder engine has been developed. The validation of the pressure trace and the torque showed the predicative ability of the model. The performance of the gasoline engine is best than that of hydrogen due to the extremely low gravimetric and energy densities of hydrogen. The more accelerated combustion and higher produced temperature are observed with the H_2ICE. Richer mixtures liberate more energy during the combustion process and this interprets the high maximum temperatures at higher values of 0. At stoichiometric conditions, the maximum calculated temperatures were 2602, 2499 and 2436 for hydrogen, gasoline and methane respectively. Within the considered range of richness ( 0.2 ≤ ø ≤ 1.0), increases in cylinder peak temperatures of 1356, 1341 and 1284 K have been recorded for hydrogen, gasoline and methane respectively. However, these increases were 255, 245.8 and 233 K, respectively, for the considered speed range (from 1000 rpm to 7000 rpm). The increase seen with higher speeds is due to the higher rates of fuel burned within a unit of time.