喷射策略对氢内燃机性能的影响

Effect of Injection Strategy on Performance of Hydrogen Internal Combustion Engine

为了响应国家“碳达峰,碳中和”号召,实现“零碳排放”,选择氢气发动机作为碳中和的关键技术路线。为了快速实现内燃机燃烧氢气的相关试验研究,在汽油发动机的基础上,采用缸内直喷的氢气喷射方案,在1.5 L发动机上进行直喷氢气详细测试,对比了汽油和氢气燃料对发动机性能和油耗的影响;并在氢气直喷状态下,研究了不同氢气喷射参数,包括氢气喷射相位、氢气喷射压力和不同氢气喷嘴流量对氢气发动机热效率和NO_(x)排放的影响规律,为后续的氢气发动机开发奠定了基础。

In order to respond to the national call of"carbon peak,carbon neutrality"and achieve"zero carbon emissions",hydrogen engine was selected as the key technology route of carbon neutrality.In order to conduct rapid experimental research on the combustion of hydrogen gas in internal combustion engine,a cylinder-direct-injection hydrogen injection scheme was adopted based on gasoline engine,and detailed testing of direct injection hydrogen was conducted on a 1.5 L engine.The effects of gasoline and hydrogen fuel on engine performance and fuel consumption were compared and analyzed.And under the condition of hydrogen direct injection,different hydrogen injection strategies were studied including hydrogen injection phase,hydrogen injection pressure,and different hydrogen nozzle flow rates,and the effects of them on the thermal efficiency and NO_(x)emissions of hydrogen engine were further studied,which laid a foundation for the company subsequent development of hydrogen engine.