부산대학교 도서관

Hydrogen energy is an ideal alternative to traditional fossil fuels. Hydrogen internal combustion engine can rely on the mature internal combustion engine industry system, which has low requirements for hydrogen purity, ultra-low emissions and higher thermal efficiency. However, hydrogen combustion speed, easy diffusion, wide ignition limit, low ignition energy characteristics of hydrogen also affect the formation of hydrogen mixture, combustion process and NOx emission performance. The combustion and emission characteristics of hydrogen internal combustion engine with intake pressurization and exhaust gas recirculation (EGR) system were studied based on the intake fuel injection hydrogen internal combustion engine test system. The results show that the output power of hydrogen internal combustion engine can be greatly increased by adopting intake supercharging system. Using EGR can increase the ignition delay period and combustion duration of hydrogen internal combustion engine, significantly reduce the maximum pressure and temperature in the cylinder and reduce NOx emission. A high EGR rate is required to significantly reduce NOx emissions at medium and high loads. The combination of EGR and intake supercharging technology can improve the output power of hydrogen combustion engine while reducing NOx emissions.