中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

46 records (took 0.024 seconds)

    Internal combustion engine
    11.
    发明授权
    Internal combustion engine 有权

    公开(公告)号：US10066534B2

    公开(公告)日：2018-09-04

    申请号：US15248680

    申请日：2016-08-26

    Applicant: Toyota Jidosha Kabushiki Kaisha

    Inventor： Hiroshi Miyamoto ,  Tatsuhiro Hashida ,  Takahiko Fujiwara ,  Yasushi Iwazaki ,  Toru Kidokoro

    IPC: F01N3/08 ,  F01N11/00 ,  F01N3/20 ,  F01N13/08

    Abstract: The internal combustion engine comprises an exhaust purification catalyst 20, a downstream side sensor 41, an air-fuel ratio control unit, and an oxygen storage amount calculating unit for calculating the oxygen excess/deficiency of the inflowing exhaust gas in an air-fuel ratio maintenance time period and cumulatively adding the calculated oxygen excess/deficiency to calculate a maximum oxygen storage amount of the exhaust purification catalyst. The oxygen storage amount calculating unit uses a point of time that an absolute value of an output slope of the downstream side sensor finally becomes less than a threshold value in the air-fuel ratio maintenance time period as an end point of cumulative addition of the oxygen excess/deficiency. The threshold value is made larger when a maximum value of the absolute value of the output slope in the air-fuel ratio maintenance time period is relatively large compared to when the maximum value is relatively small.

    Abnormality diagnosis system of air-fuel ratio sensor
    14.
    发明授权
    Abnormality diagnosis system of air-fuel ratio sensor 有权

    公开(公告)号：US10920704B2

    公开(公告)日：2021-02-16

    申请号：US15537194

    申请日：2015-11-09

    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

    Inventor： Hiroshi Miyamoto ,  Toru Kidokoro ,  Yasushi Iwazaki ,  Kenji Suzuki

    IPC: F02D41/14 ,  F02D41/12 ,  F02D41/22 ,  F01M13/00 ,  G01N33/00 ,  F02D41/24

    Abstract: An abnormality diagnosis system of an air-fuel ratio sensor acquires a blowby gas flow ratio showing a ratio of the flow of blowby gas to the flow of gas to a combustion chamber and an output current of an air-fuel ratio sensor during fuel cut control in which an internal combustion engine stops the feed of fuel to the combustion chamber and at a plurality of points of time of different flows of blowby gas passing through a blowby gas passage and flowing to the downstream side of a throttle valve in the intake passage, calculate an output current of the air-fuel ratio sensor corresponding to a blowby gas flow ratio smaller than the blowby gas flow ratios acquired at the plurality of points of time, based on the acquired blowby gas flow ratio and output current, and judge the air-fuel ratio sensor for abnormality based on the calculated output current.

    Abnormality diagnosis apparatus for particulate filter
    16.
    发明授权
    Abnormality diagnosis apparatus for particulate filter 有权

    公开(公告)号：US10232296B2

    公开(公告)日：2019-03-19

    申请号：US15086425

    申请日：2016-03-31

    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

    Inventor： Kazuya Takaoka ,  Toru Kidokoro

    IPC: B01D46/00 ,  F01N3/021 ,  F01N9/00 ,  F01N11/00 ,  G01N27/04

    Abstract: Embodiments of the present disclosure may improve the accuracy of abnormality diagnosis of a particulate filter using the output value of a particulate matter (PM) sensor provided in an exhaust passage. A time when deposition of PM between electrodes of the PM sensor is restarted after completion of a sensor recovery process may be specified as a PM deposition restart time. A process of diagnosing an abnormality of a filter based on the output value of the PM sensor at a first determination time after the PM deposition restart time may be specified as a filter diagnosis process. To determine, whether the filter diagnosis process is to be performed, a change rate of the output value of the PM sensor in a time period from the PM deposition restart time to a predetermined second determination time before the first determination time, may be compared with a threshold value.

    INTERNAL COMBUSTION ENGINE
    19.
    发明申请
    INTERNAL COMBUSTION ENGINE 审中-公开
    内燃机

    公开(公告)号：US20170058749A1

    公开(公告)日：2017-03-02

    申请号：US15248680

    申请日：2016-08-26

    Applicant: Toyota Jidosha Kabushiki Kaisha

    Inventor： Hiroshi Miyamoto ,  Tatsuhiro Hashida ,  Takahiko Fujiwara ,  Yasushi Iwazaki ,  Toru Kidokoro

    IPC: F01N11/00 ,  F01N3/20 ,  F01N13/08 ,  F01N3/08

    CPC classification number: F01N11/007 ,  F01N3/0864 ,  F01N3/101 ,  F01N3/20 ,  F01N11/005 ,  F01N13/08 ,  F01N2390/02 ,  F01N2550/02 ,  F01N2900/1402 ,  F01N2900/1602 ,  F01N2900/1624 ,  Y02T10/22 ,  Y02T10/47

    Abstract: The internal combustion engine comprises an exhaust purification catalyst 20, a downstream side sensor 41, an air-fuel ratio control unit, and an oxygen storage amount calculating unit for calculating the oxygen excess/deficiency of the inflowing exhaust gas in an air-fuel ratio maintenance time period and cumulatively adding the calculated oxygen excess/deficiency to calculate a maximum oxygen storage amount of the exhaust purification catalyst. The oxygen storage amount calculating unit uses a point of time that an absolute value of an output slope of the downstream side sensor finally becomes less than a threshold value in the air-fuel ratio maintenance time period as an end point of cumulative addition of the oxygen excess/deficiency. The threshold value is made larger when a maximum value of the absolute value of the output slope in the air-fuel ratio maintenance time period is relatively large compared to when the maximum value is relatively small.

    Abstract translation: 内燃机包括排气净化催化剂20，下游侧传感器41，空燃比控制单元和氧气存储量计算单元，用于计算空燃比中的流入废气的氧过量/不足 维持时间段，并累计加入计算出的氧过剩/缺乏量，计算排气净化催化剂的最大氧气储存量。 氧气存储量计算单元使用下游侧传感器的输出斜率的绝对值最终变得小于空燃比维持时间段中的阈值的时间点作为氧的累积添加的终点 多余/不足 当空燃比维持时间段的输出斜率的绝对值的最大值相对于最大值相对较小时，阈值变大。

    Catalyst deterioration judging system
    20.
    发明授权
    Catalyst deterioration judging system 有权
    催化剂劣化评估系统

    公开(公告)号：US09459242B2

    公开(公告)日：2016-10-04

    申请号：US14563390

    申请日：2014-12-08

    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

    Inventor： Yoshitaka Nakamura ,  Toru Kidokoro ,  Hiroshi Sawada

    IPC: F01N3/00 ,  G01N33/00 ,  F01N3/08 ,  F01N11/00 ,  B01D53/94 ,  G01M15/10 ,  F02D41/02

    CPC classification number: G01N33/0037 ,  B01D53/9495 ,  F01N3/0814 ,  F01N3/0842 ,  F01N11/00 ,  F01N11/007 ,  F01N2550/02 ,  F01N2550/03 ,  F01N2560/026 ,  F01N2900/1402 ,  F01N2900/1614 ,  F02D41/0235 ,  G01M15/102 ,  Y02A50/245 ,  Y02T10/47

    Abstract: The deterioration judgment for an absorption reduction type NOx catalyst (1) is performed quickly and correctly. A catalyst deterioration judging system comprises a supply unit (5) which supplies a reducing agent, a measuring unit (8) which measures a NOx concentration in an exhaust gas at a position downstream from the catalyst (1), a control unit (10) which regulates an amount of the reducing agent so that an air-fuel ratio of the exhaust gas is a lean air-fuel ratio when the reducing agent is supplied from the supply unit (5), and a judging unit (10) which judges deterioration of the catalyst (1) on the basis of the NOx concentration measured by the measuring unit (8) when the amount of the reducing agent is regulated so that the air-fuel ratio of the exhaust gas is the lean air-fuel ratio when NOx is absorbed by the catalyst (1).

    Abstract translation: 吸收还原型NOx催化剂（1）的劣化判定能够快速且正确地进行。 催化剂劣化判定系统包括供给单元（5），其供给还原剂，测量单元（8），其测量催化剂（1）下游位置处的排气中的NOx浓度，控制单元（10） 其调节所述还原剂的量，使得当从所述供给单元（5）供给所述还原剂时，所述排气的空燃比为稀空燃比;判定单元（10），其判定劣化 基于由所述测量单元（8）测量的NOx浓度，当所述还原剂的量被调节以使得当NOx的空燃比是稀的空燃比时，所述催化剂（1） 被催化剂（1）吸收。

Patent Agency Ranking