正时策略对进气道喷射氢气发动机混合气形成、性能与排放的影响

In order to study the factors that affect the performance and emission of the Port Fuel Injection hydrogen engine（PFI-H2ICE）, a four-cylinder intake jet hydrogen engine model was established using the one-dimensional software GT-POWER, and the effects of different excess air coefficients and timing strategies (intake valve opening timing, injection timing and ignition timing) on the formation, performance and emission of the hydrogen engine mixture were analyzed. The results show that the thin burn limit of the hydrogen engine based on Isuzu JE4N28 is 2.0-2.5. Opening the intake valve 20℃A in advance is conducive to improving the thermal efficiency of the hydrogen engine and reducing NOx emission, with a maximum reduction of 20.6%, and opening the intake valve in advance can reduce the influence of hydrogen injection timing on the performance of the hydrogen engine. The outside/inside mixture formation time of hydrogen engine is proportional to the performance, and the NOx emission is inversely proportional. The outside mixing time has a greater impact on thermal efficiency, while the inside mixing time has a greater impact on NOx emission. The effect of ignition timing, hydrogen injection timing and intake valve opening timing on the performance and emission of hydrogen engine decreases successively.