为应用吸附还原催化器控制稀燃NO_z排放,建立了一套火花点火发动机的电控节气门系统．当发动机短时间工作在富燃状态时,通过控制节气门开度和点火提前角,可以获得稳定的功率和扭矩输出．在丰田8A16气门电喷汽油机上进行了试验研究,同时采用吸附还原催化器和三效催化器控制排放．催化后NO_z排放最低可达50×10~(-6),转化效率高迭90%以上．在浓稀变换过程中,催化后的NO_z排放保持稳定． In order to control the emission of lean NO_z with the adsorption reduction catalyst, a set of electronically controlled throttle system of spark ignition engine was established. When the engine is working for a short time in a rich state, stable power and torque output can be achieved by controlling the throttle opening and ignition advance. In the Toyota 8A16 valve EFI gasoline engine experiments were conducted, while the use of adsorption reduction catalyst and three-way catalytic converter to control emissions. After the catalytic NO_z emissions as low as 50 × 10 -6, high conversion efficiency over 90%. During the lean shift, the NO_z emissions after the catalytic reaction remain stable.