车用发动机
車用髮動機
차용발동궤
2015年
4期
89-92
,共4页
邹洪波%杨志强%孙雄%冯彧
鄒洪波%楊誌彊%孫雄%馮彧
추홍파%양지강%손웅%풍욱
催化器储氧能力%后氧传感器信号%高通滤波%催化器诊断
催化器儲氧能力%後氧傳感器信號%高通濾波%催化器診斷
최화기저양능력%후양전감기신호%고통려파%최화기진단
oxygen storage capacity of catalyst%rear oxygen sensor signal%high-pass filtering%catalyst diagnosis
在一搭载1.4L自然吸气汽油发动机且满足国Ⅴ排放法规的汽车上 ,开展了基于后氧传感器信号的三效催化转化器诊断方法应用研究.试验结果表明 :随着三效催化转化器储氧能力的下降 ,后氧传感器信号的振动频率及幅值增大 ;三效催化转化器储氧能力损失平均值及标准偏差随着高通滤波截止频率的减小而增大 ,最优截止频率为0.2 ;通过合理优化各诊断参数 ,该诊断方法能有效地监测出三效催化转化器的失效.
在一搭載1.4L自然吸氣汽油髮動機且滿足國Ⅴ排放法規的汽車上 ,開展瞭基于後氧傳感器信號的三效催化轉化器診斷方法應用研究.試驗結果錶明 :隨著三效催化轉化器儲氧能力的下降 ,後氧傳感器信號的振動頻率及幅值增大 ;三效催化轉化器儲氧能力損失平均值及標準偏差隨著高通濾波截止頻率的減小而增大 ,最優截止頻率為0.2 ;通過閤理優化各診斷參數 ,該診斷方法能有效地鑑測齣三效催化轉化器的失效.
재일탑재1.4L자연흡기기유발동궤차만족국Ⅴ배방법규적기차상 ,개전료기우후양전감기신호적삼효최화전화기진단방법응용연구.시험결과표명 :수착삼효최화전화기저양능력적하강 ,후양전감기신호적진동빈솔급폭치증대 ;삼효최화전화기저양능력손실평균치급표준편차수착고통려파절지빈솔적감소이증대 ,최우절지빈솔위0.2 ;통과합리우화각진단삼수 ,해진단방법능유효지감측출삼효최화전화기적실효.
On a vehicle with 1 .4 L naturally aspirated and China Ⅴ gasoline engine ,the application of three-way catalyst diag-nostic method based on the rear oxygen sensor signal was researched .The experimental results show that the oscillation fre-quency and amplitude of rear oxygen sensor signal increase with the decrease of oxygen storage capacity of catalyst .The aver-age and standard deviation of oxygen storage capacity loss increase with the decrease of the cutoff frequency of high-pass filte-ring and the optimal cutoff frequency is 0 .2 .The catalyst diagnostic method can finally detect the failure of three-way catalyst by optimizing all diagnostic parameters .
