CAJ | 학술논문

对随着发动机负荷的升高，排气中NOx浓度增大，氧传感器的中值电压会发生偏移，导致高负荷空燃比(α)偏稀的现象进行了试验研究和讨论。试验结果表明，对氧传感器的中值电压进行修正，可明显减少NOx的排放。
대수착발동궤부하적승고，배기중NOx농도증대，양전감기적중치전압회발생편이，도치고부하공연비(α)편희적현상진행료시험연구화토론。시험결과표명，대양전감기적중치전압진행수정，가명현감소NOx적배방。
The A/F control is an important work of the match of TWC and EFI gasoline engine.However,when the engine load increases, the concentration of the NOx in the exhaust will also increase，thus causing the set-point voltage becomes high, and eventually making the A/f lean. In order to find out the effect of the correction of the set-point voltage on the emission of the NOx, experimental investigations have been done on an engine test bench. The results show that the A/F becomes lean when the load is high. It is an effective way to reduce the NOx emission by correcting the EGO set-point voltages.