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公开(公告)号：US20190186327A1
公开(公告)日：2019-06-20
申请号：US16218669
申请日：2018-12-13
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Toru KIDOKORO , Makoto OGISO , Takeru SHIRASAWA , Kenji FURUI , Kazuya TAKAOKA
Abstract: In the abnormality diagnosis device which carries out an abnormality diagnosis of the reducing agent adding device by obtaining a diagnostic parameter which is a parameter correlated with an amount of pressure drop in a reducing agent passage in the case where, from a state in which an addition valve has been closed and in which a voltage to be applied to a pump is controlled to a diagnostic voltage so that the pressure in the reducing agent passage becomes a predetermined pressure, the addition valve is made to open in a state where the voltage to be applied to the pump is maintained at the diagnostic voltage, and by making a comparison between the diagnostic parameter and a predetermined threshold value, the abnormality diagnosis is carried out by using the diagnostic parameter or the predetermined threshold value which is corrected based on the pump discharge capacity of the pump.
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公开(公告)号：US20170226908A1
公开(公告)日：2017-08-10
申请号：US15502070
申请日：2015-08-04
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Arifumi MATSUMOTO , Toru KIDOKORO , Taiga HAGIMOTO , Kenji FURUI , Akifumi UOZUMI
IPC: F01N3/20
CPC classification number: F01N3/208 , F01N9/00 , F01N11/00 , F01N2550/03 , F01N2560/026 , F01N2570/18 , F01N2610/02 , F01N2610/1453 , F01N2900/0601 , F01N2900/1621 , F01N2900/1622 , Y02T10/24 , Y02T10/47
Abstract: An additive amount of a reducing agent to a selective reduction-type NOx catalyst is optimized. An ammonia adsorption amount of the selective reduction-type NOx catalyst is estimated based on one or a plurality of prescribed parameters related to the ammonia adsorption amount and a specific ammonia adsorption amount that is an estimated value of the ammonia adsorption amount specified by at least one of a maximum value and a minimum value of an estimated value of the ammonia adsorption amount is estimated based on an error in the prescribed parameter, and when the specific ammonia adsorption amount is outside a target range of the ammonia adsorption amount, addition of an ammonia precursor or ammonia using an adding valve is controlled such that the specific ammonia adsorption amount returns to the target range.
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公开(公告)号：US20190275465A1
公开(公告)日：2019-09-12
申请号：US16463040
申请日：2017-11-24
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Takeru SHIRASAWA , Toru KIDOKORO , Makoto OGISO , Kenji FURUI , Kenta HIROOKA
Abstract: An abnormality diagnosis system for an exhaust gas purification device performs abnormality diagnosis of an SCR catalyst on the basis of the concentration of ammonia in exhaust gas in the region downstream of the SCR catalyst. The system includes a controller configured to estimate the amount of ammonia adsorbed in the SCR catalyst in an abnormal condition (ammonia adsorption amount in abnormal condition) and the amount of ammonia adsorbed in the SCR catalyst in a normal condition (ammonia adsorption amount in normal condition). When performing abnormality diagnosis of the SCR catalyst, the controller supplies reducing agent so as to make the ammonia adsorption amount in abnormal condition larger than a first predetermined adsorption amount equal to or larger than a slip start adsorption amount in abnormal condition and to make the ammonia adsorption amount in normal condition smaller than a second predetermined adsorption amount equal to or smaller than a slip start adsorption amount in normal condition.
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公开(公告)号：US20180193819A1
公开(公告)日：2018-07-12
申请号：US15911662
申请日：2018-03-05
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Kenji FURUI , Keiichi MINAMI
IPC: B01J23/34 , B01J37/08 , B01J23/00 , B01J35/00 , B01D53/94 , B01J37/03 , B01J37/02 , B01J35/10 , B01J35/02 , B01J37/04
CPC classification number: B01J23/34 , B01D53/9418 , B01D2255/2065 , B01D2255/2073 , B01J23/002 , B01J35/0006 , B01J35/002 , B01J35/008 , B01J35/023 , B01J35/1019 , B01J37/0207 , B01J37/031 , B01J37/04 , B01J37/08 , B01J37/082 , B01J37/088 , B01J2523/00 , B01J2523/3712 , B01J2523/72 , B01J2523/69
Abstract: An exhaust gas purification catalyst containing a CeO2 particle supported on the surface of an MnO2 particle, wherein the Ce amount relative to the total amount of Mn and Ce (Ce/(Mn+Ce)) in the catalyst is more than 0 mol % and 40 mol % or less; and a method for producing the exhaust gas purification catalyst above, including mixing an aqueous solution containing a manganese ion and a cerium ion in a ratio of more than 0 mol % and 40 mol % or less in terms of the Ce amount relative to the total amount of Mn and Ce (Ce/(Mn+Ce)) and an aqueous solution having dissolved therein a carbonate ion-containing reducing agent, thereby precipitating a particle, and firing the particle, are provided.
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5.发明申请公开(公告)号：US20160208668A1
公开(公告)日：2016-07-21
申请号：US14916281
申请日：2014-09-24
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Arifumi MATSUMOTO , Tomoyuki KOGO , Taiga HAGIMOTO , Kenji FURUI , Akifumi UOZUMI
CPC classification number: F01N3/208 , F01N3/2066 , F01N11/00 , F01N11/007 , F01N2550/05 , F01N2560/021 , F01N2560/026 , F01N2610/02 , F01N2900/0416 , F01N2900/1402 , F01N2900/1621 , Y02T10/24 , Y02T10/47
Abstract: A diagnostic apparatus for an exhaust gas purification apparatus including a selective catalytic reduction NOx catalyst (SCR catalyst) provided in an exhaust passage of an internal combustion engine, a supplying unit supplying ammonia or an ammonia precursor into exhaust gas flowing into the SCR catalyst and a sensor, provided on a downstream side of the SCR catalyst, detecting NOx and ammonia in exhaust gas. The diagnostic apparatus calculates an amount of decline in output of the sensor due to a reaction between NOx and ammonia at the sensor and performs a diagnosis of the supplying unit based on the calculated amount of decline in output of the sensor.
Abstract translation: 一种排气净化装置的诊断装置，其具备设置在内燃机的排气通路中的选择性催化还原型NOx催化剂（SCR催化剂），向流入SCR催化剂的排气供给氨或氨前体的供给单元， 传感器，设置在SCR催化剂的下游侧，检测废气中的NOx和氨。 诊断装置计算由于传感器处的NOx和氨之间的反应而导致的传感器的输出下降量，并且基于计算出的传感器的输出量的下降量来执行供给单元的诊断。
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Patent Agency Ranking
公开(公告)号：US20160131063A1
公开(公告)日：2016-05-12
申请号：US14893735
申请日：2014-05-29
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Tomoyuki KOGO , Makoto OGISO , Kazuya TAKAOKA , Taiga HAGIMOTO , Arifumi MATSUMOTO , Hirokazu NISHIJIMA , Kenji FURUI
CPC classification number: F02D41/1461 , F01N3/208 , F01N11/00 , F01N11/007 , F01N2550/02 , F01N2560/026 , F01N2610/02 , F01N2900/08 , F01N2900/1402 , F02D41/0055 , F02D41/0235 , F02D41/1462 , F02D41/1463 , F02D41/22 , F02D2041/1469 , F02M26/06 , F02M26/15 , F02M26/23 , Y02T10/24 , Y02T10/47
Abstract: An abnormality diagnosis apparatus includes: an exhaust gas purification apparatus arranged in an exhaust passage of an internal combustion engine and including a selective catalytic reduction catalyst; a supply apparatus supplying an additive such as ammonia to the exhaust gas purification apparatus; an EGR apparatus recirculating a part of exhaust gas from the exhaust passage at a downstream side of a position of supplying the additive to an intake passage; calculating means for calculating a NOx inflow amount into the exhaust gas purification apparatus using a parameter indicating an operating state of the internal combustion engine; diagnosing means for diagnosing an abnormality in the exhaust gas purification apparatus using the calculated NOx inflow amount as a parameter; and correcting means for, when a part of the exhaust gas is recirculated, increasingly correcting the calculated NOx inflow amount in accordance with an amount of the additive to be recirculated together with exhaust gas.
Abstract translation: 异常诊断装置包括：排气净化装置，其配置在内燃机的排气通路中，并具有选择性催化还原催化剂; 向废气净化装置供给氨等添加剂的供给装置; EGR装置，在将添加剂供给到进气通路的位置的下游侧，使来自排气通路的废气的一部分再循环; 计算装置，用于使用表示内燃机的运转状态的参数计算排出气体净化装置的NOx流入量; 用于使用所计算的NOx流入量作为参数来诊断排气净化装置中的异常的诊断装置; 以及校正装置，用于当废气的一部分再循环时，根据与废气一起再循环的添加剂的量，逐渐校正所计算的NOx流入量。
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公开(公告)号：US20160131003A1
公开(公告)日：2016-05-12
申请号：US14892968
申请日：2014-05-29
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Tomoyuki KOGO , Makoto OGISO , Taiga HAGIMOTO , Arifumi MATSUMOTO , Kazuya TAKAOKA , Hirokazu NISHIJIMA , Kenji FURUI
CPC classification number: F01N3/208 , B01D53/9418 , B01D53/9495 , F01N3/035 , F01N3/106 , F01N3/2066 , F01N11/00 , F01N11/007 , F01N13/009 , F01N2550/02 , F01N2560/026 , F01N2610/02 , F01N2900/0402 , F01N2900/1402 , F02D41/0065 , F02D41/0235 , F02M26/15 , Y02C20/10 , Y02T10/24 , Y02T10/47
Abstract: An abnormality diagnosis apparatus includes an exhaust gas purification apparatus arranged in an exhaust passage of an internal combustion engine and including a SCR catalyst; a supply apparatus supplying an additive such as ammonia to the exhaust gas purification apparatus; an EGR apparatus recirculating a part of exhaust gas from the exhaust passage at a downstream side of a position of supplying the additive to an intake passage; obtaining means for obtaining a NOx inflow amount into the exhaust gas purification apparatus; diagnosing means for calculating a physical quantity correlated to a NOx purification performance of the exhaust gas purification apparatus using the obtained NOx inflow amount, and diagnosing that an abnormality has occurred in the exhaust gas purification apparatus when the physical quantity is smaller than a threshold; and correcting means for, when the additive is recirculated together with a part of the exhaust gas, correcting the threshold to a smaller value than when otherwise.
Abstract translation: 一种异常诊断装置，具备排气净化装置，其配置在内燃机的排气通路中，并具备SCR催化剂; 向废气净化装置供给氨等添加剂的供给装置; EGR装置，在将添加剂供给到进气通路的位置的下游侧，使来自排气通路的废气的一部分再循环; 获得用于获得排出气体净化装置中的NOx流入量的装置; 用于使用所获得的NOx流入量计算与排气净化装置的NOx净化性能相关的物理量的诊断装置，并且当所述物理量小于阈值时诊断在所述排气净化装置中发生异常的诊断装置; 以及校正装置，用于当所述添加剂与排气的一部分一起再循环时，将所述阈值校正为比否则更小的值。
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8.发明公开公开(公告)号：US20230407776A1
公开(公告)日：2023-12-21
申请号：US18134337
申请日：2023-04-13
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Kenji FURUI
CPC classification number: F01N9/00 , F01N11/007 , F01N2900/1402 , F01N2900/0408 , F01N2560/02
Abstract: An exhaust gas control apparatus for the internal combustion engine includes a catalyst disposed in an exhaust passage, an upstream air-fuel ratio sensor configured to detect an air-fuel ratio of in-flow exhaust gas that flows into the catalyst, a downstream air-fuel ratio sensor configured to detect an air-fuel ratio of out-flow exhaust gas that flows out of the catalyst, and an electronic control unit configured to control the air-fuel ratio of the in-flow exhaust gas. The electronic control unit is configured to, when a predetermined condition is satisfied, control the air-fuel ratio of the in-flow exhaust gas based on an output from the downstream air-fuel ratio sensor without using an output from the upstream air-fuel ratio sensor. The electronic control unit is configured to, when the predetermined condition is not satisfied, control the air-fuel ratio of the in-flow exhaust gas based on the output from the upstream air-fuel ratio sensor.
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公开(公告)号：US20190195107A1
公开(公告)日：2019-06-27
申请号：US16227665
申请日：2018-12-20
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Takeru SHIRASAWA , Toru KIDOKORO , Makoto OGISO , Kenji FURUI
Abstract: When an abnormality diagnosis of an SCR catalyst is carried out, diagnostic supply control is carried out in such a manner that the first estimated adsorption amount, which is an amount of adsorption of ammonia in the SCR catalyst at the time when the SCR catalyst is assumed to be in a predetermined abnormal state, becomes equal to or more than a first predetermined adsorption amount, and the second estimated adsorption amount, which is an amount of adsorption of ammonia in the SCR catalyst at the time when the SCR catalyst is assumed to be in a predetermined normal state, becomes smaller than a second predetermined adsorption amount. Then, supply decreasing control to decrease an amount of adsorption of ammonia in the SCR catalyst is carried out, after the end of the execution of the diagnostic supply control.
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公开(公告)号：US20170175605A1
公开(公告)日：2017-06-22
申请号：US15377328
申请日：2016-12-13
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Yuriko HAGIMOTO , Takeru SHIRASAWA , Ryohei Ono , Kenji FURUI
CPC classification number: F01N3/208 , B01D46/0027 , B01D53/9418 , B01D53/9431 , B01D53/9495 , B01D2279/30 , F01N3/035 , F01N3/2066 , F01N11/002 , F01N2240/25 , F01N2510/06 , F01N2560/025 , F01N2560/026 , F01N2560/06 , F01N2560/08 , F01N2560/14 , F01N2610/02 , F01N2900/1406 , F01N2900/1622
Abstract: An object of the disclosure is to adjust the ammonia adsorption amount in an SCR catalyst supported on an SCR filter as close as possible to a target adsorption amount in an exhaust gas purification system including the SCR filter. In a system according to the disclosure, the quantity of ammonia supplied by an ammonia supplier is made smaller when a differential pressure change rate at the time when ammonia is supplied by the ammonia supplier is lower than a predetermined threshold than when the differential pressure change rate at the time when ammonia is supplied by the ammonia supplier is equal to or higher than the predetermined threshold. Moreover, when the differential pressure change rate is lower than the predetermined threshold, the change in the quantity of ammonia supplied by the ammonia supplier relative to the change in the filter PM deposition amount is kept equal to zero.
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