Optimization of Injection Duration to Increase the Substitution of CNG Fuel on a Diesel Dual Fuel Engine Operation at High Load
Keywords:
Injection duration, Cylinder pressure, Heat release rate, Fuel substitution.Abstract
The availability of fossil fuels is dwindling, encouraging the use of alternative fuels such as Compressed Natural Gas (CNG) in internal combustion engines. The dual fuel technology applied to diesel engines can replace diesel fuel as the main fuel. CNG fuel is used as a substitute fuel for diesel fuel. The purpose of this study is to optimize the injection duration so that it can increase the supply of CNG fuel into the cylinder so that it can replace diesel fuel with a greater amount. This research was carried out experimentally by optimizing the injection duration of CNG fuel from 70° -150 °CA with 20° CA intervals on diesel dual fuel engine. The results showed that the duration of CNG injection of 110 °CA obtained maximum engine performance as indicated by the increase in maximum cylinder pressure of 71.18 bar and maximum heat release rate of 132.20 kJ/m³ . °CA and an increase in the substitution of CNG fuel by 66% on a diesel dual fuel engine operating at high load. This research also contributes to adding references to student learning in the energy conversion machine subject so that it can increase student knowledge in the field of renewable energy.
