汽油机稀燃及其NO_x排放控制技术研究

Study on the lean burn and NO_x emission control techniques for gasoline engine

阐述了汽油机稀燃技术的发展及现状,并就3种不同模式稀燃系统的特点做了介绍,分析了稀燃带来的排放问题、控制稀燃汽油机NOx排放的3种催化技术及废气再循环技术的研究进展和各自利弊,讨论了改善稀燃汽油机经济性和NOx排放的研究方向。

The development and the current situation of lean burn techniques on gasoline engine are expounded and the characteristics of three different lean burn system and emission control problems are also introduced in this paper. And then the research progress, advantages and disadvantages of the NOx emission control techniques which includes three catalytic technologies （NOx direct catalytic cracking, Selective Catalyctic Reduction, Lean-NOx- Trap ） and Exhaust Gas Recirculation are analyzed. And the direction of improve Vehicle Economy and emissions are discussed.