Performance Study of Direct Injection Gasoline Engine Based on Hydrogen Injection Strategy

By refitting a traditional gasoline engine into a hydrogen-blended gasoline engine with gasoline intake port injection and hydrogen direct injection, the influence of hydrogen injection strategy on the mixture distribution and performance of the engine is explored. Based on the optimized control parameters, the power performance and emission of the hydrogen-blended engine are optimized. The results show that hydrogen injection strategy has a significant effect on the performance of the hydrogen-addition engine. With reasonable hydrogen injection strategy and ignition time, stable lean combustion can be achieved, and engine power can be increased by 18% at low speed and low load, while decreasing NOx emissions by only 6%.