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公开(公告)号：US20150275733A1
公开(公告)日：2015-10-01
申请号：US14424144
申请日：2013-12-06
申请人： Arifumi MATSUMOTO , Toru KIDOKORO , Taiga HAGIMOTO , Kazuya TAKAOKA , Hirokazu NISHIJIMA , Yuki TERUI , Akifumi UOZUMI
发明人： Arifumi Matsumoto , Toru Kidokoro , Taiga Hagimoto , Kazuya Takaoka , Hirokazu Nishijima , Yuki Terui , Akifumi Uozumi
CPC分类号： F01N3/2066 , B01D53/9404 , B01D53/9495 , B01D2251/2067 , F01N3/035 , F01N3/106 , F01N3/208 , F01N11/00 , F01N2550/02 , F01N2550/03 , F01N2550/05 , F01N2560/021 , F01N2560/026 , F01N2610/02 , F01N2610/1453 , F01N2900/1402 , F01N2900/1602 , F01N2900/1616 , F01N2900/1621 , F01N2900/1622 , F01N2900/1806 , Y02A50/2325 , Y02T10/24 , Y02T10/47
摘要： In a failure determination system that performs failure determination of an exhaust gas purification apparatus having a NOx selective catalytic reduction catalyst (NOx catalyst) that is disposed in an exhaust passage of an internal combustion engine and uses ammonia as a reducing agent, the failure determination of the exhaust gas purification apparatus is performed by a failure determination unit, based on a detected value of a NOx sensor that detects NOx in exhaust gas. Then, based on an adsorption amount difference at assumed failure that is the difference between an ammonia equilibrium adsorption amount in the NOx catalyst in an equilibrium state of ammonia adsorption, assuming that the exhaust gas purification apparatus is in a predefined failure state, and an actual ammonia adsorption amount in the NOx catalyst, the failure determination itself by the failure determination unit is inhibited or the use of the NOx sensor in the failure determination is restricted. Accordingly, in the failure determination system of exhaust gas purification apparatus having the NOx selective catalytic reduction catalyst, erroneous determinations at the time of failure determination are suppressed, thereby further improving the accuracy of the failure determination.
摘要翻译： 在具有设置在内燃机的排气通路中并使用氨作为还原剂的NOx选择性催化还原催化剂（NOx催化剂）的排气净化装置的故障判定系统中，故障判定系统， 废气净化装置由故障判定部基于检测排气中的NOx的NOx传感器的检测值进行。 然后，假设假设故障时的吸附量差异为氨吸附平衡状态下的NOx催化剂中的氨平衡吸附量之间的差异，假设废气净化装置处于预定的失效状态， NOx催化剂中的氨吸附量，故障判定单元的故障判定本身被抑制，或者在故障判定中使用NOx传感器受到限制。 因此，在具有NOx选择催化还原催化剂的排气净化装置的故障判定系统中，抑制故障判定时的错误判定，进一步提高故障判定的准确性。
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公开(公告)号：US09366168B2
公开(公告)日：2016-06-14
申请号：US14648765
申请日：2013-10-29
申请人： Arifumi Matsumoto , Toru Kidokoro , Taiga Hagimoto , Kazuya Takaoka , Hirokazu Nishijima , Yuki Terui , Akifumi Uozumi
发明人： Arifumi Matsumoto , Toru Kidokoro , Taiga Hagimoto , Kazuya Takaoka , Hirokazu Nishijima , Yuki Terui , Akifumi Uozumi
CPC分类号： F01N3/208 , B01D53/86 , B01D53/94 , B01D53/9404 , B01D53/9477 , B01D53/9495 , B01D2251/2067 , F01N3/106 , F01N11/002 , F01N11/007 , F01N13/0097 , F01N2550/02 , F01N2560/026 , F01N2570/18 , F01N2610/02 , F01N2900/1616 , F01N2900/1622 , Y02T10/24 , Y02T10/47
摘要： An object of the present invention is to increase the accuracy of a deterioration determination in a deterioration determination system of an exhaust emission control device having a selective reduction type NOx catalyst, by suppressing false determinations when the deterioration determination is made. The deterioration determination system includes a catalyst having an oxidative capacity downstream of a NOx catalyst using ammonia as a reducing agent. When an amount of ammonia adsorbed by the NOx catalyst is larger than an equilibrium adsorption amount, out of the amount of ammonia flowing into the catalyst having the oxidative capacity, at least one of the amount of ammonia flowing out from the catalyst having the oxidative capacity and the amount of ammonia converted to NOx in the catalyst having the oxidative capacity or a total value of both is calculated. When the value exceeds a threshold, the use of a detection value of an NOx sensor is limited in a deterioration determination or the deterioration determination itself is prohibited.
摘要翻译： 本发明的目的是通过在进行劣化判定时抑制误判定来提高具有选择还原型NOx催化剂的废气排放控制装置的劣化判定系统的劣化判定的精度。 劣化测定系统包括使用氨作为还原剂的具有在NOx催化剂下游的氧化能力的催化剂。 当NOx催化剂吸附的氨的量大于平衡吸附量时，在流入具有氧化能力的催化剂的氨的量之外，从具有氧化能力的催化剂流出的氨的量中的至少一个 并且计算在具有氧化能力或二者的总值的催化剂中转化为NOx的氨的量。 当该值超过阈值时，在劣化判定中限制使用NOx传感器的检测值，或者禁止劣化判定本身。
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公开(公告)号：US20150315946A1
公开(公告)日：2015-11-05
申请号：US14648765
申请日：2013-10-29
申请人： Arifumi MATSUMOTO , Toru KIDOKORO , Taiga HAGIMOTO , Kazuya TAKAOKA , Hirokazu NISHIJIMA , Yuki TERUI , Akifumi UOZUMI
发明人： Arifumi MATSUMOTO , Toru KIDOKORO , Taiga HAGIMOTO , Kazuya TAKAOKA , Hirokazu NISHIJIMA , Yuki TERUI , Akifumi UOZUMI
CPC分类号： F01N3/208 , B01D53/86 , B01D53/94 , B01D53/9404 , B01D53/9477 , B01D53/9495 , B01D2251/2067 , F01N3/106 , F01N11/002 , F01N11/007 , F01N13/0097 , F01N2550/02 , F01N2560/026 , F01N2570/18 , F01N2610/02 , F01N2900/1616 , F01N2900/1622 , Y02T10/24 , Y02T10/47
摘要： An object of the present invention is to increase the accuracy of a deterioration determination in a deterioration determination system of an exhaust emission control device having a selective reduction type NOx catalyst, by suppressing false determinations when the deterioration determination is made. The deterioration determination system includes a catalyst having an oxidative capacity downstream of a NOx catalyst using ammonia as a reducing agent. When an amount of ammonia adsorbed by the NOx catalyst is larger than an equilibrium adsorption amount, out of the amount of ammonia flowing into the catalyst having the oxidative capacity, at least one of the amount of ammonia flowing out from the catalyst having the oxidative capacity and the amount of ammonia converted to NOx in the catalyst having the oxidative capacity or a total value of both is calculated. When the value exceeds a threshold, the use of a detection value of an NOx sensor is limited in a deterioration determination or the deterioration determination itself is prohibited.
摘要翻译： 本发明的目的是通过在进行劣化判定时抑制误判定来提高具有选择还原型NOx催化剂的废气排放控制装置的劣化判定系统的劣化判定的精度。 劣化测定系统包括使用氨作为还原剂的具有在NOx催化剂下游的氧化能力的催化剂。 当NOx催化剂吸附的氨的量大于平衡吸附量时，在流入具有氧化能力的催化剂的氨的量之外，从具有氧化能力的催化剂流出的氨的量中的至少一个 并且计算在具有氧化能力或二者的总值的催化剂中转化为NOx的氨的量。 当该值超过阈值时，在劣化判定中限制使用NOx传感器的检测值，或者禁止劣化判定本身。
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