CO₂含有バイオメタンサロゲート燃料の組成が火花点火エンジンの性能に及ぼす影響

抄録

Compressed biomethane gas (CBG), a biofuel, is attracting attention in India and other Asian countries as a means of decarbonizing internal combustion engines. In this study, we experimentally clarified the effect of methane gas mixed with CO2 on the performance of a spark-ignition engine fueled with simulate CBG. The results showed that the maximum in-cylinder temperature decreased as the mixture ratio of CO2 increased, suggesting that the cooling loss was reduced due to low-temperature combustion. It was found that although CO2 blending decreased the flame propagation speed, the suppression of cooling loss was dominant, and the thermal efficiency was improved with lower exhaust gas emissions.