CAJ | 학술논문

为应用吸附还原催化器控制稀燃NOx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NOx排放最低可达50×10-6,转化效率高达90%以上.在浓稀变换过程中,催化后的NOx排放保持稳定.
위응용흡부환원최화기공제희연NOx배방,건립료일투화화점화발동궤적전공절기문계통.당발동궤단시간공작재부연상태시,통과공제절기문개도화점화제전각,가이획득은정적공솔화뉴구수출.재봉전8A16기문전분기유궤상진행료시험연구,동시채용흡부환원최화기화삼효최화기공제배방.최화후NOx배방최저가체50×10-6,전화효솔고체90%이상.재농희변환과정중,최화후적NOx배방보지은정.
A set of electronically controlled throttle system for lean burn spark ignition engine was developed to control NOx emission using NOx storage reduction(NSR) catalyst. The output torque and power kept steady as the engine operated under brief rich cursions through control of spark advance angle and throttle opening. The NOx emission control experiments were carried out on Toyota 8A sixteen-valve EFI spark ignition engine with NSR and three-way catalyst(TWC). The results show that the minimum value of the NOx emission is 50 × 10 -6with the conversion efficiency of above 90% after catalysts. The NOx concentration after catalysts keeps steady during the lean/rich modulation.