针对汽油机效率低的问题，提出利用氢气燃料特性来提高汽油机效率的方法。研究搭载在线制氢系统、氢气缸内直喷、局部富氢稀燃汽油机燃烧规律及节能机理，该汽油机可采用高压缩比，燃烧稀混合气，实现速燃，避免发动机失火，大负荷工作区域可采用质调节取代量调节，提高发动机效率。采用在线制氢的方式来供给氢气，可解决氢气存储和运输困难问题。在提高汽油机效率的同时，研究车载在线制氢系统与发动机的综合控制策略，以提高车载在线制氢系统的使用效率。车载在线制氢系统需要电力，理想应用车型为混合动力电动汽车。为此，开展搭载在线制气系统混合动力电动汽车的研究，采用理论研究、仿真分析及实验研究手段，对发动机燃烧、系统控制模型、混合动力能量管理优化控制策略进行研究，找到提高整车效率的规律和方法。本项目对最大限度提高混合动力电动汽车的效率具有理论研究意义和实用参考价值，同时为车载在线制氢技术的应用提供了一条新的途径。

Focusing on improving the efficiency of the conventional gasoline engine, a novel method to use hydrogen fuel is introduced in this project. The fundamentals and performances will be studied, such as on-board hydrogen production system, hydrogen direct injection system, lean-burn gasoline engine with local hydrogenous mixture. The whole system can provides the characters of higher compression ratio and leaner fuel mixture, which can be used to get fast combustion, and avoid engine misfire. What's more, during the heavy load work condition, the quality adjustment is used to reduce mechanical loss of the engine. The elements mentioned above brings gasoline engine with a higher efficiency. The on-board hydrogen production can avoid the current troubles, such as hydrogen storage and transportation. The control strategy of the novel engine combined with on-board hydrogen production will be studied in this project to optimal the total system efficiency. Considering the electric power supply for on-board hydrogen production, the perfect vehicle will be the hybrid electric vehicle. Hence, the project research contents will be as follows: studying on-board hydrogen production combined with gasoline engine and hybrid electric Vehicle. The combustion models, control system models will be developed, the optimal control methods will be studied to find the highest whole system efficiency. The contributions for this project are finding a higher efficiency power source, as well as providing a choice for hydrogen application based on on-board hydrogen production.