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    • 3. 发明公开
    • EXHAUST GAS PURIFYING DEVICE FOR INTERNAL COMBUSTION ENGINE AND METHOD FOR DETERMINING NOx PURIFYING CATALYST DETERIORATION
    • 排放控制装置用于确定NOx净化催化剂的劣化内燃机和方法
    • EP2479394A1
    • 2012-07-25
    • EP10811644.3
    • 2010-07-22
    • Nissan Motor Co., Ltd.
    • ISHIBASHI, YasutakaHOSAKA YuuichiISHINO TakeshiUEHARA Issho
    • F01N3/20B01D53/94F01N3/08F01N3/24F02D45/00
    • F01N3/0842F01N3/101F01N2550/03F02D41/0275F02D41/1441F02D2200/0802F02D2200/0806F02D2200/0814Y02T10/22
    • An exhaust emission control device includes a NOx purification catalyst, a three-way catalyst provided upstream of the NOx purification catalyst, a first air-fuel ratio sensor provided upstream of the three-way catalyst, a second air-fuel ratio provided downstream of the NOx purification catalyst, a rich spike unit for changing an exhaust gas air-fuel ratio from lean to rich for a predetermined period to reduce and purify NOx adsorbed by the NOx purification catalyst, a first detection unit for detecting a NOx adsorption amount and an oxygen storage amount of the three-way catalyst and the NOx purification catalyst during rich spike, a second detection unit for detecting the oxygen storage amount of the three-way catalyst and the NOx purification catalyst until the output of the second air-fuel sensor becomes lean after the rich spike, and a deterioration determination unit for determining deterioration of the NOx purification catalyst based on a detected value of the first detection unit and that of the second detection unit.
    • 的废气排放控制装置包括NOx净化催化剂,NOx净化催化剂,三元催化剂的上游侧设置的第一空燃比传感器的上游侧设置一个三元催化剂,第二空燃比的下游设置的 NOx净化催化剂,用于从稀的排气空燃比变化到富一段预定的时间,以减少和NOx净化由NOx净化催化剂,用于检测NOx吸附量和氧气的第一检测部吸附在燃料过量供给单元 的三元催化剂的存储量和燃料过量供给时的NOx净化催化剂,直到第二空燃比传感器的输出变稀检测三元催化剂中的氧存储量和NOx净化催化剂的第二检测单元 富尖峰,以及用于基于所述第一检测的u的检测值的NOx净化催化剂的确定性采矿劣化的劣化判定单元之后 NIT和没有所述第二检测单元的。