Hydrogen Internal Combustion Engine Turbo Charging Matching and Parameters Optimization for High Power Density

Hydrogen-fueled internal combustion engine(H2ICE)is an effective way to use hydrogen as a future energy carrier.Since the power density of the natural aspirated port fuel injection H2ICE is lower than that of traditional internal combustion engine,turbo charging system technology is significant to increase the power output of H2ICE.Based on a CNG engine with displacement of 9.73L,the turbo charging H2ICE model was built to deal with the turbo charging match problems.On this basis,H2ICE turbo charging matching and optimization of compression ratio and intake valve opening timing were accomplished.The results of performance prediction show that the maximum torque of turbocharged H2ICE is 890N·m,which is two times of the natural aspirated H2ICE.The efficiency is improved by 7%~15% and the specific emission of NOx tends to decrease.