Research on the effect of fuel ratio and ignition advance angle on the performance of ammonia hydrogen engine
To address the low engine output efficiency and increased emissions caused by inaccurate fuel matching ratio and ignition advance angle parameters in ammonia hydrogen engines,this paper takes a straight six-cylinder four-stroke ammonia hydrogen engine as the research object with different parameters given.An engine simulation model is built in GT-POWER,and the feasibility of the ammonia hydrogen engine simulation model is verified by employing Simulink joint simulation.Then,the impact of fuel ratio and ignition advance angle on engine performance is investigated.Our research results show the engine achieves the highest comprehensive utilization efficiency at a 9:1 ammonia hydrogen ratio.Under these conditions,a 26 ° CA ignition advance angle improves engine efficiency and reduces exhaust temperature,but is not conducive to reducing pollutant emissions.A 14 ° CA ignition advance angle cuts pollutant emissions,but undermines engine efficiency.A 20 ° CA is put forward as the optimal ignition advance angle.Our research results may provide some valuable references for the calibration and performance study of ammonia hydrogen engines in the future.
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