Custom-Designed Pre-Chamber: Investigating the Effects on Small SI Engine in Active and Passive Modes

This work shows the results of an experimental campaign carried out in two spark ignition engines, a small optical research engine and its commercial counterpart, using turbulent system (pre-chamber) specifically designed for engines. Advanced techniques conventional methods were used to study combustion process under various operating conditions. The pre-chamber operated actively passively engine. Results showed that configuration resulted increase indicated mean effective pressure (IMEP) decrease coefficient variation (CoV) IMEP. These improvements compensated challenges such as slow methane rate, poor lean burn capability, air displacement. In addition, exhibited lower fuel consumption specific exhaust emissions compared standard system. novelty this lies successful implementation retrofit solution SI showing improved efficiency emissions. goes beyond previous efforts by demonstrating benefits engines without requiring extensive modifications. provide valuable insights into automotive industry’s pursuit optimization highlight significance innovative approaches contributing sustainable mobility.