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    Catalyst deterioration detection system
    1.
    发明授权
    Catalyst deterioration detection system 有权

    公开(公告)号：US11365667B2

    公开(公告)日：2022-06-21

    申请号：US17095913

    申请日：2020-11-12

    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

    Inventor： Kenji Furui ,  Go Hayashita ,  Yoichi Kadota

    IPC: F01N11/00 ,  F02D41/14 ,  B01D53/94 ,  F02D41/02

    Abstract: The catalyst deterioration detection system 1 comprises an air-fuel ratio detection device 41 detecting an air-fuel ratio of an exhaust gas flowing out from the catalyst 20, an air-fuel ratio control part 71, and a deterioration judgment part 72. The air-fuel ratio control part is configured to perform a lean control making the air-fuel ratio of the inflowing exhaust gas leaner than a stoichiometric air-fuel ratio and a rich control making the air-fuel ratio of the inflowing exhaust gas richer than the stoichiometric air-fuel ratio. The deterioration judgment part is configured to calculate an amplitude of an air-fuel ratio of an exhaust gas flowing out from the catalyst due to the lean control and the rich control based on an output of the air-fuel ratio detection device and judge that the catalyst is deteriorating if the amplitude is equal to or greater than a threshold value.

    DIAGNOSTIC SYSTEM FOR INTERNAL COMBUSTION ENGINE
    2.
    发明申请
    DIAGNOSTIC SYSTEM FOR INTERNAL COMBUSTION ENGINE 有权
    内燃机诊断系统

    公开(公告)号：US20160177804A1

    公开(公告)日：2016-06-23

    申请号：US14976335

    申请日：2015-12-21

    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

    Inventor： Arifumi Matsumoto ,  Toru Kidokoro ,  Taiga Hagimoto ,  Makoto Ogiso ,  Kenji Furui

    IPC: F01N11/00 ,  F01N3/08

    CPC classification number: F01N11/002 ,  F01N3/035 ,  F01N3/0814 ,  F01N3/0821 ,  F01N3/2066 ,  F01N3/208 ,  F01N9/00 ,  F01N11/00 ,  F01N2250/02 ,  F01N2550/04 ,  F01N2560/08 ,  F01N2900/0418 ,  F01N2900/0422 ,  F01N2900/1402 ,  F01N2900/1602 ,  F01N2900/1606 ,  Y02T10/24 ,  Y02T10/47

    Abstract: A diagnostic system for an internal combustion engine is disclosed. The diagnostic system may include an electronic control unit. The electronic control unit may determine whether a predetermined condition is satisfied. The predetermined condition may be a condition under which an amount of particulate matter that separates from a filter is larger than or equal to a predetermined separation amount as a urea water-originated deposit once accumulated in the filter separates in gaseous form. When the electronic control unit determines that the predetermined condition is satisfied, the electronic control unit may not execute a diagnosis of a malfunction in the filter based on a filter differential pressure until a predetermined period elapses from the point in time at which it is determined that the predetermined condition is satisfied.

    Abstract translation: 公开了一种用于内燃机的诊断系统。 诊断系统可以包括电子控制单元。 电子控制单元可以确定是否满足预定条件。 预定条件可以是一旦累积在过滤器中的尿素水来源的沉积物以气态形式分离的情况下，与过滤器分离的颗粒物质的量大于或等于预定分离量。 当电子控制单元确定满足预定条件时，电子控制单元可能不会从基于滤波器压差的过滤器执行故障诊断，直到从确定到 满足预定条件。

    Abnormality diagnosis device for reducing agent adding device
    3.
    发明授权
    Abnormality diagnosis device for reducing agent adding device 有权

    公开(公告)号：US10753261B2

    公开(公告)日：2020-08-25

    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

    IPC: F01N11/00 ,  F01N3/20

    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.

    Abnormality diagnosis device for reducing agent adding device
    4.
    发明授权
    Abnormality diagnosis device for reducing agent adding device 有权

    公开(公告)号：US10711678B2

    公开(公告)日：2020-07-14

    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

    IPC: F01N11/00 ,  F01N3/20

    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.

    Exhaust purification system of internal combustion engine
    9.
    发明授权
    Exhaust purification system of internal combustion engine 有权

    公开(公告)号：US11143128B2

    公开(公告)日：2021-10-12

    申请号：US16726246

    申请日：2019-12-24

    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

    Inventor： Ryosuke Kayanuma ,  Kenji Furui ,  Koichiro Fukuda

    IPC: F02D41/02 ,  F01N11/00 ,  F01N3/08

    Abstract: An exhaust purification system of an internal combustion engine includes a catalyst arranged in an exhaust passage of the internal combustion engine and able to store oxygen, a storage amount calculating part configured to calculate an oxygen storage amount of the catalyst, a poisoning amount calculating part configured to calculate a poisoning amount of the catalyst, and an oxygen amount control part configured to control an amount of oxygen supplied to the catalyst based on the oxygen storage amount and the poisoning amount.

    Malfunction diagnosis apparatus and malfunction diagnosis method
    10.
    发明授权
    Malfunction diagnosis apparatus and malfunction diagnosis method 有权

    公开(公告)号：US10385752B2

    公开(公告)日：2019-08-20

    申请号：US15179026

    申请日：2016-06-10

    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

    Inventor： Arifumi Matsumoto ,  Taiga Hagimoto ,  Kenji Furui ,  Makoto Ogiso ,  Toru Kidokoro

    IPC: F01N11/00 ,  F01N3/20

    Abstract: An amount of reducing agent adsorbed on a NOx catalyst when a reducing agent supply device is normal and a corresponding detected value may be estimated. The corresponding detected value may be detected by a NOx sensor, and the detected value may correspond to an amount of reducing agent adsorbed on the NOx catalyst. When the estimated amount of adsorption is larger than or equal to a first amount and is smaller than or equal to a second amount, a diagnosis of the NOx catalyst based on the detected value of the NOx sensor may be prevented. The first amount may be an amount of adsorbed reducing agent corresponding to a minimum value of the corresponding detected value. The second amount may be an amount of adsorbed reducing agent corresponding to the corresponding detected value when the amount of adsorbed reducing agent is zero and larger than the first amount.

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