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    Exhaust purification system and catalyst control method
    2.
    发明授权
    Exhaust purification system and catalyst control method 有权

    公开(公告)号：US10260398B2

    公开(公告)日：2019-04-16

    申请号：US15560963

    申请日：2016-02-29

    申请人： ISUZU MOTORS LIMITED

    发明人： Teruo Nakada ,  Takayuki Sakamoto ,  Daiji Nagaoka ,  Hiroyuki Yuza

    IPC分类号： F01N3/00 ,  F01N9/00 ,  F01N3/20 ,  F01N3/36 ,  F02D45/00 ,  F01N3/08

    摘要： An exhaust purification system includes; a catalyst provided in an exhaust passage of an engine to purify an exhaust gas; a catalyst temperature estimating unit that estimates a temperature of the catalyst based on an initial temperature of the catalyst at the time of starting of the engine and a caloric value of the catalyst which changes depending on an operating state of the internal combustion engine; and an initial catalyst temperature setting unit that sets an initial temperature of the catalyst based on a catalyst temperature stored immediately before stopping the engine, a temperature of an exhaust gas flowing into the catalyst which is stored immediately before stopping the engine, a temperature of an exhaust gas flowing into the catalyst which is acquired at the time of starting the engine, and a temperature of air taken into the engine which is acquired at the time of starting the engine.

    Exhaust purification system and catalyst regeneration method
    4.
    发明授权
    Exhaust purification system and catalyst regeneration method 有权

    公开(公告)号：US10677128B2

    公开(公告)日：2020-06-09

    申请号：US15555286

    申请日：2016-02-25

    申请人： ISUZU MOTORS LIMITED

    发明人： Teruo Nakada ,  Takayuki Sakamoto ,  Daiji Nagaoka ,  Hiroyuki Yuza

    IPC分类号： F01N3/20 ,  F01N9/00 ,  F01N3/08

    摘要： Provided is an exhaust purification system including: an NOx occlusion reduction type catalyst that is provided in an exhaust system of an internal combustion engine, and occludes NOx when an exhaust gas is in a lean state, and reduces the NOx when the exhaust gas is in a rich state; a regeneration control unit that executes a regeneration process of bringing the exhaust gas into a rich state to reduce the NOx occluded in the NOx occlusion reduction type catalyst; a storing unit that stores an exhaust lambda prediction value in advance when the regeneration process is executed; a reduction amount estimating unit that estimates an NOx reduction amount when the regeneration process is executed; and a prohibition unit that prohibits the execution of the regeneration process by the regeneration control unit when the estimated NOx reduction amount is less than a predetermined lower limit threshold.

    Exhaust purification system and catalyst control method
    10.
    发明授权
    Exhaust purification system and catalyst control method 有权

    公开(公告)号：US10221745B2

    公开(公告)日：2019-03-05

    申请号：US15560963

    申请日：2016-02-29

    申请人： ISUZU MOTORS LIMITED

    发明人： Teruo Nakada ,  Takayuki Sakamoto ,  Daiji Nagaoka ,  Hiroyuki Yuza

    IPC分类号： F01N3/00 ,  F01N9/00 ,  F01N3/20 ,  F01N3/36 ,  F02D45/00 ,  F01N3/08

    摘要： An exhaust purification system includes; a catalyst provided in an exhaust passage of an engine to purify an exhaust gas; a catalyst temperature estimating unit that estimates a temperature of the catalyst based on an initial temperature of the catalyst at the time of starting of the engine and a caloric value of the catalyst which changes depending on an operating state of the internal combustion engine; and an initial catalyst temperature setting unit that sets an initial temperature of the catalyst based on a catalyst temperature stored immediately before stopping the engine, a temperature of an exhaust gas flowing into the catalyst which is stored immediately before stopping the engine, a temperature of an exhaust gas flowing into the catalyst which is acquired at the time of starting the engine, and a temperature of air taken into the engine which is acquired at the time of starting the engine.