利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

26 条记录 (耗时 0.021 秒)

    Control system of internal combustion engine
    11.
    发明授权
    Control system of internal combustion engine 有权

    公开(公告)号：US10132257B2

    公开(公告)日：2018-11-20

    申请号：US15310602

    申请日：2015-05-15

    申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA

    发明人： Norihisa Nakagawa ,  Shuntaro Okazaki ,  Yuji Yamaguchi

    IPC分类号： F02D41/02 ,  F02D41/14 ,  F02D35/00

    摘要： An internal combustion engine includes an exhaust purification catalyst. A control system includes an air-fuel ratio sensor downstream of the exhaust purification catalyst, and an air-fuel ratio control device which controls the air-fuel ratio of the exhaust gas. The target air-fuel ratio is set to a lean air-fuel ratio when output air-fuel ratio of the sensor becomes a rich judged air-fuel ratio or less and is set to a rich air-fuel ratio when output air-fuel ratio becomes a lean judged air-fuel ratio or more. When the engine operating state is a steady operation state and is a low load operation state, at least one of an average lean degree of the target air-fuel ratio while the target air-fuel ratio is set to a lean air-fuel ratio and an average rich degree of the target air-fuel ratio while the target air-fuel ratio is set to a rich air-fuel ratio is increased.

    CONTROL SYSTEM OF INTERNAL COMBUSTION ENGINE
    14.
    发明申请
    CONTROL SYSTEM OF INTERNAL COMBUSTION ENGINE 审中-公开
    内燃机控制系统

    公开(公告)号：US20160326975A1

    公开(公告)日：2016-11-10

    申请号：US15110556

    申请日：2014-12-18

    申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA

    发明人： Norihisa Nakagawa ,  Shuntaro Okazaki ,  Yuji Yamaguchi

    IPC分类号： F02D41/02 ,  F02D41/30 ,  F02D41/14 ,  F01N3/20 ,  F01N3/08

    CPC分类号： F02D41/0295 ,  F01N3/0864 ,  F01N3/20 ,  F01N2900/1402 ,  F02D41/1441 ,  F02D41/1454 ,  F02D41/1475 ,  F02D41/3005 ,  F02D2200/0814

    摘要： A control system of an internal combustion engine which can suppress a drop in the purification performance of an exhaust purification catalyst is provided. The control system of an internal combustion engine is provided with an exhaust purification catalyst and downstream side air-fuel ratio sensor, performs feedback control so that an air-fuel ratio of the exhaust gas which flows into the exhaust purification catalyst becomes a target air-fuel ratio, and performs target air-fuel ratio setting control which alternately switches the target air-fuel ratio to a lean set air-fuel ratio which is leaner than a stoichiometric air-fuel ratio and a rich set air-fuel ratio which is richer than the stoichiometric air-fuel ratio. In the control system, when an engine operating state is a steady operating state, compared with when it is not a steady operating state, at least one of a rich degree of the rich set air-fuel ratio or a lean degree of the lean set air-fuel ratio is made to increase.

    摘要翻译： 提供了能够抑制排气净化催化剂的净化性能下降的内燃机的控制系统。 内燃机的控制系统设有排气净化催化剂和下游侧空燃比传感器，进行反馈控制，使流入排气净化催化剂的排气的空燃比成为目标空气 - 进行目标空燃比设定控制，该目标空燃比设定控制将目标空燃比交替地切换成比理论空燃比更浓的浓空燃比，富空燃比更浓 比化学计量空燃比。 在控制系统中，当发动机运转状态为稳定运行状态时，与不稳定运转状态相比，富集设定空燃比的浓度或精密集中的稀薄度 空燃比增加。

    Control system of internal combustion engine
    15.
    发明授权
    Control system of internal combustion engine 有权

    公开(公告)号：US10781765B2

    公开(公告)日：2020-09-22

    申请号：US15329440

    申请日：2015-07-28

    申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA

    发明人： Koichi Hoshi ,  Norihisa Nakagawa ,  Shuntaro Okazaki ,  Yuji Yamaguchi

    IPC分类号： F01N11/00 ,  F01N3/08 ,  F02D41/14 ,  F02D41/02

    摘要： An internal combustion engine comprises an exhaust purification catalyst, a downstream side air-fuel ratio sensor which is arranged at a downstream side of the exhaust purification catalyst, and an air flow meter which detects an amount of intake air. The control system of the internal combustion engine controls the exhaust air-fuel ratio to a target air-fuel ratio by feedback control, sets the target air-fuel ratio at a lean air-fuel ratio when the output air-fuel ratio of the downstream side air-fuel ratio sensor becomes a rich air-fuel ratio, and sets the target air-fuel ratio at a rich air-fuel ratio when the output air-fuel ratio of the downstream side air-fuel ratio sensor becomes a lean air-fuel ratio. When a change in the amount of intake air occurs so that it increases, the lean degree is set lower than before, in at least part of the time period during which the target air-fuel ratio is set to the lean air-fuel ratio, and the rich degree is set lower than before, in at least part of the timer period during which the target air-fuel ratio is set to the rich air-fuel ratio.

    Control system of internal combustion engine
    16.
    发明授权
    Control system of internal combustion engine 有权

    公开(公告)号：US10697387B2

    公开(公告)日：2020-06-30

    申请号：US15318811

    申请日：2015-06-19

    申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA

    发明人： Shuntaro Okazaki ,  Norihisa Nakagawa ,  Yuji Yamaguchi

    IPC分类号： F02D41/24 ,  F02D41/02 ,  F02D41/14

    摘要： An internal combustion engine comprises an exhaust purification catalyst and a downstream side air-fuel ratio sensor which is arranged at the downstream side of the exhaust purification catalyst. The control system performs feedback control so that the air-fuel ratio of the exhaust gas becomes the target air-fuel ratio, and performs learning control to correct the control center air-fuel ratio based on the output air-fuel ratio of the downstream side sensor. The target air-fuel ratio is switched to the lean air-fuel ratio when the output air-fuel ratio of the downstream side sensor becomes the rich judged air-fuel ratio and is switched to the rich air-fuel ratio when the output air-fuel ratio becomes the lean judged air-fuel ratio. When the learning promoting condition stands, the lean degree of the average target air-fuel ratio while the target air-fuel ratio is set to the lean air-fuel ratio and the rich degree of the average target air-fuel ratio while the target air-fuel ratio is set to the rich air-fuel ratio are increased.

    Control apparatus for naturally aspirated gasoline engine
    17.
    发明授权
    Control apparatus for naturally aspirated gasoline engine 有权

    公开(公告)号：US10087853B2

    公开(公告)日：2018-10-02

    申请号：US15591839

    申请日：2017-05-10

    申请人： Toyota Jidosha Kabushiki Kaisha

    发明人： Yuji Yamaguchi ,  Hirokazu Ito ,  Yuji Miyoshi

    IPC分类号： F01N3/00 ,  F02D9/02 ,  F02D41/00 ,  F02D41/02 ,  F02D41/26

    摘要： An object is to supply fresh air and EGR gas into a cylinder in good balance according to the required load in a naturally aspirated gasoline engine. When the operation state of the engine falls in a low load range, a control apparatus adjusts the degree of opening of the second throttle while keeping the first throttle fully open and controls EGR gas quantity by adjusting the degree of opening of the EGR valve. When the operation state falls in a middle load range, the apparatus controls EGR gas quantity by adjusting the degree of opening of the first throttle while keeping the EGR valve fully open. When the operation state falls in a high load range, the apparatus adjusts the degree of opening of the first throttle while keeping the second throttle fully open and controls EGR gas quantity by adjusting the degree of opening of the EGR valve.