利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

23 条记录 (耗时 0.019 秒)

    Exhaust emission control system of engine
    1.
    发明授权
    Exhaust emission control system of engine 有权

    公开(公告)号：US10378407B2

    公开(公告)日：2019-08-13

    申请号：US15647473

    申请日：2017-07-12

    申请人： Mazda Motor Corporation

    发明人： Masanobu Kanno ,  Takayuki Yamaguchi ,  Masayuki Tetsuno

    IPC分类号： F01N3/20 ,  F01N3/08

    摘要： An exhaust emission control system of an engine including a NOx catalyst for storing NOx within exhaust gas when an air-fuel ratio thereof is lean, and reducing the NOx when the air-fuel ratio is approximately stoichiometric or rich, the NOx catalyst also functioning as an oxidation catalyst for oxidizing HC, is provided. The system includes a SCR catalyst for purifying NOx by causing a reaction with NH3, a urea injector, and a processor configured to execute a fuel injection controlling module, and a NOx reduction controlling module for performing a NOx reduction control to enrich the air-fuel ratio to a target ratio. When the urea injection is abnormal, the NOx reduction controlling module performs an NH3-supplied NOx reduction control in which the NOx catalyst supplies NH3 to the SCR catalyst, by performing the NOx reduction control, a lean air-fuel ratio operation control, and then the NOx reduction control again.

    EXHAUST PURIFICATION DEVICE OF ENGINE
    2.
    发明申请
    EXHAUST PURIFICATION DEVICE OF ENGINE 审中-公开

    公开(公告)号：US20180347488A1

    公开(公告)日：2018-12-06

    申请号：US15971793

    申请日：2018-05-04

    申请人： Mazda Motor Corporation

    发明人： Masanobu Kanno ,  Hiroyuki Nishimura ,  Kenji Tanimura ,  Kenta Ando

    IPC分类号： F02D41/02 ,  F02D41/00 ,  F01N3/08 ,  F02D41/40

    摘要： A NOx catalyst is provided on an exhaust passage of an engine. The NOx catalyst reduces the occluded NOx when an air-fuel ratio of exhaust gas is in the vicinity of a stoichiometric air-fuel ratio or in a richer state than the stoichiometric air-fuel ratio. Turbocharging is executed by turbochargers. In a low load region within the reduction execution region, a target air-fuel ratio is achieved, as required for NOx reduction, by air amount adjustment with an air amount control valve provided on an intake passage. Since a large amount of air is needed in the high load region within the reduction execution region, the target air-fuel ratio is achieved by air amount adjustment using turbocharging pressure control.

    CONTROL SYSTEM FOR ENGINE
    5.
    发明申请
    CONTROL SYSTEM FOR ENGINE 审中-公开

    公开(公告)号：US20190032593A1

    公开(公告)日：2019-01-31

    申请号：US16023165

    申请日：2018-06-29

    申请人： Mazda Motor Corporation

    发明人： Masanobu Kanno ,  Hiroyuki Nishimura ,  Yoshiaki Tomita

    IPC分类号： F02D41/40 ,  F02D41/14 ,  F02D41/02 ,  F02D41/00

    摘要： A control system for an engine is provided, which includes an engine body formed with a cylinder, a NOx catalyst, an oxidation catalyst, a PM filter, a fuel injector configured to perform a main injection and a post injection, and a controller configured to execute a DeNOx control in which the fuel injector is controlled to perform the main and post injections so that an air-fuel ratio of exhaust gas is brought close to the stoichiometric air-fuel ratio or becomes rich and fuel supplied into the cylinder by the post injection combusts therein, and a filter regenerating control in which the fuel injector is controlled to perform the main and post injections so that the air-fuel ratio becomes lean and the fuel supplied into the cylinder by the post injection causes no combustion therein, the controller executing the DeNOx control and the filter regenerating control consecutively in this order.

    Control system for engine
    8.
    发明授权
    Control system for engine 有权

    公开(公告)号：US10598121B2

    公开(公告)日：2020-03-24

    申请号：US16023165

    申请日：2018-06-29

    申请人： Mazda Motor Corporation

    发明人： Masanobu Kanno ,  Hiroyuki Nishimura ,  Yoshiaki Tomita

    IPC分类号： F02D41/40 ,  F02D41/02 ,  F02D41/00 ,  F01N3/10 ,  F01N13/00 ,  F02D41/14 ,  F01N3/021 ,  F01N3/20 ,  F01N3/08 ,  F01N3/025

    摘要： A control system for an engine is provided, which includes an engine body formed with a cylinder, a NOx catalyst, an oxidation catalyst, a PM filter, a fuel injector configured to perform a main injection and a post injection, and a controller configured to execute a DeNOx control in which the fuel injector is controlled to perform the main and post injections so that an air-fuel ratio of exhaust gas is brought close to the stoichiometric air-fuel ratio or becomes rich and fuel supplied into the cylinder by the post injection combusts therein, and a filter regenerating control in which the fuel injector is controlled to perform the main and post injections so that the air-fuel ratio becomes lean and the fuel supplied into the cylinder by the post injection causes no combustion therein, the controller executing the DeNOx control and the filter regenerating control consecutively in this order.

    Exhaust emission control system of engine
    9.
    发明授权
    Exhaust emission control system of engine 有权

    公开(公告)号：US10443525B2

    公开(公告)日：2019-10-15

    申请号：US15641501

    申请日：2017-07-05

    申请人： Mazda Motor Corporation

    发明人： Masanobu Kanno ,  Masayuki Tetsuno ,  Takayuki Yamaguchi

    IPC分类号： F02D41/14 ,  F01N13/00 ,  B01D53/94 ,  F01N3/08 ,  F01N3/20 ,  F01N9/00 ,  F02D41/00 ,  F02D41/02 ,  F02D41/10 ,  F02D41/40 ,  F02D41/38

    摘要： An exhaust emission control system of an engine, including an NOx catalyst disposed in an exhaust passage for storing NOx within exhaust gas when an air-fuel ratio of the exhaust gas is lean, and reducing the stored NOx when the air-fuel ratio is approximately stoichiometric or rich, is provided. The system includes an SCR catalyst disposed in the exhaust passage downstream of the NOx catalyst and for purifying NOx within exhaust gas by causing a reaction with ammonia, a controller executing a NOx reduction controlling module for executing a control in which the air-fuel ratio is controlled to a target air-fuel ratio so that the stored NOx is reduced, and an ammonia adsorption amount acquiring module for acquiring an ammonia adsorption amount of the SCR catalyst by detection or estimation. The NOx reduction controlling module controls the target air-fuel ratio to be leaner as the ammonia adsorption amount increases.

    Exhaust emission control system of engine
    10.
    发明授权
    Exhaust emission control system of engine 有权

    公开(公告)号：US10443524B2

    公开(公告)日：2019-10-15

    申请号：US15641139

    申请日：2017-07-03

    申请人： Mazda Motor Corporation

    发明人： Takayuki Yamaguchi ,  Masanobu Kanno ,  Masayuki Tetsuno

    IPC分类号： F02D41/14 ,  B01D53/94 ,  F01N3/08 ,  F01N3/20 ,  F01N9/00 ,  F02D41/00 ,  F02D41/02 ,  F02D41/10 ,  F02D41/40

    摘要： An exhaust emission control system of an engine including a NOx catalyst disposed in an exhaust passage and for storing NOx within exhaust gas when an air-fuel ratio of the exhaust gas is lean, and reducing the stored NOx when the air-fuel ratio is approximately stoichiometric or rich, is provided. The system includes a SCR catalyst disposed downstream of the NOx catalyst and for purifying NOx by causing a reaction with ammonia, and a processor configured to execute a NOx reduction controlling module for controlling the air-fuel ratio to a target ratio so that the stored NOx is reduced. The controlling module limits the performance of the NOx reduction control when a temperature of the SCR catalyst is above a given temperature and loosens the limitation in a given engine operating state in which an exhaust gas flow rate is above a given rate despite the SCR catalyst temperature.