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公开(公告)号：US10392981B2
公开(公告)日：2019-08-27
申请号：US15557459
申请日：2016-03-09
申请人： ISUZU MOTORS LIMITED
发明人： Teruo Nakada , Takayuki Sakamoto , Daiji Nagaoka , Hiroyuki Yuza
IPC分类号： F01N3/08 , F01N3/10 , F01N3/20 , F01N3/36 , F01N9/00 , B01D53/94 , F01N3/021 , F02D41/00 , F02D41/02 , F02D41/04 , F02D41/12 , F02D41/14 , F02D41/18 , F02D41/22 , F02D41/24 , F02D41/40
摘要： The embodiments include: a NOx occlusion/reduction catalyst which is provided to an exhaust passage of an internal combustion engine, occludes NOx in exhaust when the exhaust is in a lean state, and reduces and purifies occluded NOx when the exhaust is in a rich state; a NOx purging control unit which, when the exhaust is in the rich state, executes NOx purging in which the NOx occluded in the NOx occlusion/reduction catalyst is reduced and purified; and a NOx-purging-prohibition processing unit which, when at least one of a plurality of prohibition conditions is fulfilled, prohibits execution of catalyst regeneration processing by the NOx purging control unit even if a catalyst-regeneration-processing start request has been issued, and, when one of the prohibition conditions is fulfilled during execution of the catalyst regeneration processing, invalidates the prohibition condition and allows continued execution of the catalyst regeneration processing by the NOx purging control unit.
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公开(公告)号：US09670810B2
公开(公告)日：2017-06-06
申请号：US14781715
申请日：2014-03-05
申请人： ISUZU MOTORS LIMITED
发明人： Takayuki Sakamoto , Daiji Nagaoka
CPC分类号： F01N3/0885 , F01N3/0842 , F01N3/106 , F01N9/002 , F01N2570/14 , F02D41/0002 , F02D41/028 , F02D41/029 , F02D41/1475 , F02D41/1482 , F02D41/18 , F02D2041/1422 , F02D2250/21 , Y02T10/42
摘要： An exhaust gas purification system which can suppress a decrease in engine torque during a desulfurization process applied to a NOx storage reduction catalyst. The system includes a NOx storage reduction catalyst in an exhaust pipe of an engine, and a desulfurization process control unit that controls an amount of intake air introduced to the engine to enrich the exhaust gas, and performs a desulfurization process to the NOx storage reduction catalyst. The desulfurization process control unit is configured to gradually reduce an amount of intake air when the desulfurization process is commenced.
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公开(公告)号：US20150292425A1
公开(公告)日：2015-10-15
申请号：US14439769
申请日：2013-11-19
申请人： ISUZU MOTORS LIMITED
发明人： Daiji Nagaoka , Takayuki Sakamoto
CPC分类号： F02D41/029 , F01N3/023 , F01N3/0253 , F01N3/035 , F01N9/002 , F01N11/00 , F02D21/08 , F02D41/0055 , F02D41/0235 , F02D41/40 , F02D2200/0812 , F02M26/05 , F02M26/15 , F02M26/23 , Y02T10/44 , Y02T10/47
摘要： An exhaust gas purification system with a diesel particulate filter in an exhaust passage of an internal combustion engine. A surface filtration cake layer formation enhancement control or a particulate matter generation amount reduction control is temporarily performed immediately after a forced regeneration treatment on the diesel particulate filter. The system and a method are directed to a particulate matter slip-through phenomenon in which the particulate matter slip-through amount temporarily increases immediately after particulate matter re-combustion in a forced regeneration treatment on the diesel particulate filter. The diesel particulate filter is disposed in the exhaust passage of the internal combustion engine and reduces the total amount of particulate matter emitted to the atmosphere immediately after the particulate matter re-combustion in the forced regeneration treatment on the diesel particulate filter.
摘要翻译： 一种在内燃机的排气通道中具有柴油微粒过滤器的废气净化系统。 在对柴油机微粒过滤器进行强制再生处理后，立即暂时进行表面滤饼层形成增强控制或颗粒物产生量减少控制。 该系统和方法涉及一种颗粒物质滑脱现象，其中在对柴油机微粒过滤器进行强制再生处理的颗粒物再燃烧之后，颗粒物质滑入量立即临时增加。 柴油机微粒过滤器设置在内燃机的排气通道中，并且在对柴油机微粒过滤器进行强制再生处理的颗粒物重燃后立即减少排放到大气中的颗粒物质的总量。
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公开(公告)号：US10683788B2
公开(公告)日：2020-06-16
申请号：US15560024
申请日：2016-03-15
申请人： ISUZU MOTORS LIMITED
发明人： Teruo Nakada , Takayuki Sakamoto , Daiji Nagaoka
IPC分类号： G01N31/10 , F01N3/20 , F01N9/00 , F01N11/00 , B01D53/94 , F01N3/08 , F02D41/14 , F02D41/00 , F02D41/18 , F02D41/02 , F02D41/40 , F02D41/24
摘要： An exhaust purification system includes a NOx-occlusion-reduction-type catalyst that occludes NOx in exhaust in a lean state and reduces and purifies the occluded NOx in exhaust in a rich state, and a NOx purge rich control unit that executes NOx purge of reducing and purifying the occluded NOx by putting the exhaust into the rich state by fuel injection control, where a catalyst temperature of the NOx-occlusion-reduction-type catalyst is equal to or higher than a catalyst temperature threshold value and a NOx occlusion amount of the NOx-occlusion-reduction-type catalyst is equal to or higher than an NOx occlusion amount threshold value, and executes the NOx purge when the catalyst temperature is lower than a catalyst temperature threshold value.
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公开(公告)号：US10669909B2
公开(公告)日：2020-06-02
申请号：US15559376
申请日：2016-03-16
申请人： ISUZU MOTORS LIMITED
发明人： Teruo Nakada , Takayuki Sakamoto , Daiji Nagaoka
摘要： An exhaust purification system is provided with a NOx-occlusion-reduction-type catalyst and a NOx purge rich control unit that executes NOx purge of reducing and purifying the occluded NOx by putting the exhaust into a rich state by fuel injection control, in a case where a catalyst temperature of the NOx-occlusion-reduction-type catalyst is equal to or higher than a catalyst temperature threshold value and a NOx occlusion amount of the NOx-occlusion-reduction-type catalyst is equal to or higher than an NOx occlusion amount threshold value, and executes the NOx purge even when the NOx occlusion amount is less than the NOx occlusion amount threshold value, in a case where the catalyst temperature is equal to or higher than a catalyst temperature threshold value which is greater than the catalyst temperature threshold value.
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公开(公告)号：US10316716B2
公开(公告)日：2019-06-11
申请号：US15540017
申请日：2015-12-25
申请人： ISUZU MOTORS LIMITED
发明人： Teruo Nakada , Takayuki Sakamoto , Daiji Nagaoka
IPC分类号： F01N3/08 , F01N3/10 , F01N11/00 , F02D41/02 , B01D53/94 , F01N13/00 , F01N3/36 , F01N9/00 , F01N3/021
摘要： An exhaust purification system includes: a NOx reduction catalyst for reducing and purifying NOx in an exhaust gas; a catalyst regeneration control module for executing a catalyst regeneration process of restoring a NOx purification capacity of the NOx reduction catalyst by switching an air-fuel ratio of the exhaust gas from a lean state to a rich state by using in parallel an air system control to reduce an intake air amount and an injection system control to increase a fuel injection amount; an exhaust gas temperature sensor that is provided on a downstream side of the NOx reduction catalyst on an exhaust passageway; a catalyst temperature estimating module for estimating a catalyst temperature of the NOx reduction catalyst; a temperature sensor value estimating module for estimating a sensor value of the exhaust gas temperature sensor; and an abnormality determination module for determining on an abnormality of a catalyst regeneration process.
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公开(公告)号：US10233807B2
公开(公告)日：2019-03-19
申请号：US15557075
申请日：2016-02-26
申请人： ISUZU MOTORS LIMITED
发明人： Teruo Nakada , Takayuki Sakamoto , Daiji Nagaoka
摘要： Provided is an exhaust purification system including: an NOx occlusion reduction type catalyst (32), a catalyst temperature estimating unit (115), an NOx occlusion amount estimating unit (113), a regeneration control unit (100) that performs catalyst regeneration of bringing an exhaust gas into a rich state to recover NOx occlusion capacity of the NOx occlusion reduction type catalyst (32), an interval setting unit (118) that sets a target interval from the termination of the catalyst regeneration to a start of next catalyst regeneration, a catalyst regeneration start processing unit (110) that starts the next catalyst regeneration when the NOx occlusion amount is equal to or greater than a threshold and an elapsed time from the termination of the catalyst regeneration reaches the target interval, and an interval target value correcting unit (119) that extends and corrects the target interval based on the NOx occlusion amount when the catalyst temperature is lower than a predetermined catalyst activation temperature.
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公开(公告)号：US10196950B2
公开(公告)日：2019-02-05
申请号：US15557075
申请日：2016-02-26
申请人： ISUZU MOTORS LIMITED
发明人： Teruo Nakada , Takayuki Sakamoto , Daiji Nagaoka
摘要： Provided is an exhaust purification system including: an NOx occlusion reduction type catalyst (32), a catalyst temperature estimating unit (115), an NOx occlusion amount estimating unit (113), a regeneration control unit (100) that performs catalyst regeneration of bringing an exhaust gas into a rich state to recover NOx occlusion capacity of the NOx occlusion reduction type catalyst (32), an interval setting unit (118) that sets a target interval from the termination of the catalyst regeneration to a start of next catalyst regeneration, a catalyst regeneration start processing unit (110) that starts the next catalyst regeneration when the NOx occlusion amount is equal to or greater than a threshold and an elapsed time from the termination of the catalyst regeneration reaches the target interval, and an interval target value correcting unit (119) that extends and corrects the target interval based on the NOx occlusion amount when the catalyst temperature is lower than a predetermined catalyst activation temperature.
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公开(公告)号：US10174702B2
公开(公告)日：2019-01-08
申请号：US15505587
申请日：2015-08-11
申请人： ISUZU MOTORS LIMITED
发明人： Daiji Nagaoka , Takayuki Sakamoto
IPC分类号： F02D35/02 , F02D41/24 , F02D41/40 , F01N3/02 , F02P19/02 , F01N3/025 , F01N3/20 , F01N3/36 , F01N3/023 , F01N3/029 , F02D41/02 , F02M35/10
摘要： There is provided a regeneration device for an exhaust-gas purifying device 40 which is provided in an exhaust system of an internal combustion engine, the regeneration device including: an injector for injecting fuel into a cylinder; a glow plug which is energized to be heated to thereby increase a temperature inside the cylinder; and a regeneration control unit for executing a regenerating operation for restoring a purification capacity of the exhaust-gas purifying device by controlling the injection of fuel of the injector and the energization of the glow plug, wherein during the regenerating operation, the regeneration control unit controls the injection of fuel of the injector by a multi-stage injection including at least a post injection and energizes the glow plug at a predetermined duty ratio to burn, within the cylinder, fuel supplied by the post injection.
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公开(公告)号：US10130913B2
公开(公告)日：2018-11-20
申请号：US15545045
申请日：2016-01-19
申请人： ISUZU MOTORS LIMITED
发明人： Teruo Nakada , Takayuki Sakamoto , Daiji Nagaoka
摘要： There is provided an exhaust gas purification system including: a NOx storage-reduction catalyst that is provided in an exhaust system of an internal combustion engine 10 to reduce and purify NOx in exhaust gas; a deterioration degree estimation module for estimating a degree of deterioration of the NOx storage-reduction catalyst; a NOx storage amount estimation module for estimating a NOx storage amount of the NOx storage-reduction catalyst; a regeneration control unit for starting a regeneration process in which a NOx storage capacity of the NOx storage-reduction catalyst is restored when a NOx storage amount that is estimated by the NOx storage amount estimation module reaches a predetermined storage amount threshold; and a storage amount threshold correction module for correcting the storage amount threshold based on the degree of deterioration that is estimated by the deterioration degree estimation module.
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