Article Development of a Control-Indicating System for the Constant Volume Combustion Chamber

Abstract

Researching the optimization of the combustion process using the Constant Volume Combustion Chamber (CVCC) system is one of the effective methods for investigating the influencing factors on the combustion process and the formation of exhaust gases from the fuel utilized in internal combustion engines. This research focuses on developing control algorithms for the CVCC system based on synchronized signals from spark plugs, dynamic pressure sensors, fuel injectors, and real-time data logging to adjust the air-fuel mixture ratio (C₂H₂, N₂, O₂) in order to create operating conditions similar to the late compression stage in diesel engines and simulate exhaust gas recirculation. The three oxygen concentrations after premixed combustion (ignition) of 21%, 15%, and 10% were selected for experimentation in the CVCC system before the diesel fuel injection phase begins at an initial mixture pressure of 14 bar. The results indicate that the system has effectively controlled and recorded data with a high level of accuracy, an observed deviation of 2.24% was found when analyzing the values of maximum combustion pressure after ignition at the experimental oxygen concentrations. Additionally, the electronic systems fully adhere to the trigger signals and the calculated time control signals to determine the air-fuel ratio accurately.