Experimental study on Camless compressed air engine port timing using electronic control unit

Abstract

This research paper presents an experimental study conducted on an air engine with an electronic control unit (ECU) to investigate the influence of inlet pressure on port timing. Traditional air engines use mechanical camshafts to control valve timing, but camless air engines use solenoid valves controlled by an ECU for more precise control. The study compares variations in intake sustains angle (ISA) and exhaust advance angle (EAA) to determine their impact on engine performance. The results show that ISA has a more significant influence on work performance and work done compared to EAA. The study also identifies the optimal ISA for different intake pressures, showing that higher ISA is beneficial at low intake pressure, while lower ISA is preferable with increasing pressure. Overall optimal ISA increases an average 12 % percentage efficiency of the air engine compared to the change in EAA. This research provides valuable insights for designing and developing non-polluting propulsion engine systems and optimizing the design of air engines for improved performance, fuel efficiency, and lower emissions.