A Simulation Study of Effect of Pressure and Temperature of Intake Air on Combustion Characteristics of A Homogenous Charge Compression Ignition Engine

This paper presents a study of HCCI combustion characteristics of a single cylinder internal combustion (IC) engine, named AVL-5402, fueled with n-heptane under different intake pressures (from 1 bar to 1.3 bar) using a turbocharger, while intake temperature is kept constant at 298K. For a study of intake temperature on the combustion process, the temperature varies from 298K to 338K, while intake air pressure is 1 bar. The research is carried out on AVLBoost software. The engine speed is 2000 rpm, fuel mass-flow rate is 10, 10.4, 10.8 and 11.2 mg. The simulation results show that the start of ignition timing becomes advanced when the inlet air pressure and temperature increase. However, indicated efficiency decreases when the temperature increases