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公开(公告)号：US20100257844A1
公开(公告)日：2010-10-14
申请号：US12758999
申请日：2010-04-13
CPC分类号： F01N3/208 , F01N11/00 , F01N2560/026 , F01N2570/10 , F01N2610/02 , F01N2900/1622 , Y02T10/24 , Y02T10/47
摘要： An exhaust gas purifying system for a diesel engine has an ECU, a passage of exhaust gas, a unit having SCR catalyst, a NOx sensor placed at a downstream side of the unit, and a urea water adding valve placed at an upstream side of the unit. The SCR catalyst in the unit selectively adsorbs ammonia, and selectively purifies NOx contained in an exhaust gas emitted from the diesel engine by the adsorbed ammonia. The ECU changes the urea water adding amount, and performs abnormality diagnosis based on the detection result of the NOx sensor while changing an adding amount of the urea water. The ECU uses a first condition to indicate the presence of an excess NOx amount in the exhaust gas, and a second condition to indicate there is no error cause by the ammonia adsorption on the SCR catalyst.
摘要翻译： 用于柴油发动机的排气净化系统具有ECU，废气通道，具有SCR催化剂的单元，位于该单元下游侧的NOx传感器，以及放置在该单元的上游侧的尿素水添加阀 单元。 该单元中的SCR催化剂选择性地吸附氨，并且通过吸附的氨选择性地净化从柴油发动机排放的废气中所含的NOx。 ECU改变尿素水添加量，并且在改变尿素水的添加量的同时，基于NOx传感器的检测结果进行异常诊断。 ECU使用第一条件来指示废气中存在过量的NOx量，并且指示不存在SCR催化剂上的氨吸附引起的误差的第二条件。
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公开(公告)号：US08418438B2
公开(公告)日：2013-04-16
申请号：US12758999
申请日：2010-04-13
IPC分类号： F01N3/00
CPC分类号： F01N3/208 , F01N11/00 , F01N2560/026 , F01N2570/10 , F01N2610/02 , F01N2900/1622 , Y02T10/24 , Y02T10/47
摘要： An exhaust gas purifying system for a diesel engine has an ECU, a passage of exhaust gas, a unit having SCR catalyst, a NOx sensor placed at a downstream side of the unit, and a urea water adding valve placed at an upstream side of the unit. The SCR catalyst in the unit selectively adsorbs ammonia, and selectively purifies NOx contained in an exhaust gas emitted from the diesel engine by the adsorbed ammonia. The ECU changes the urea water adding amount, and performs abnormality diagnosis based on the detection result of the NOx sensor while changing an adding amount of the urea water. The ECU uses a first condition to indicate the presence of an excess NOx amount in the exhaust gas, and a second condition to indicate there is no error cause by the ammonia adsorption on the SCR catalyst.
摘要翻译： 用于柴油发动机的排气净化系统具有ECU，废气通道，具有SCR催化剂的单元，位于该单元下游侧的NOx传感器，以及放置在该单元的上游侧的尿素水添加阀 单元。 该单元中的SCR催化剂选择性地吸附氨，并且通过吸附的氨选择性地净化从柴油发动机排放的废气中所含的NOx。 ECU改变尿素水添加量，并且在改变尿素水的添加量的同时，基于NOx传感器的检测结果进行异常诊断。 ECU使用第一条件来指示废气中存在过量的NOx量，并且指示不存在SCR催化剂上的氨吸附引起的误差的第二条件。
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公开(公告)号：US20090288396A1
公开(公告)日：2009-11-26
申请号：US12465958
申请日：2009-05-14
CPC分类号： F01N3/208 , F01N13/009 , F01N2610/02 , F01N2610/146 , F01N2900/1402 , F01N2900/1602 , F01N2900/1621 , F01N2900/1622 , Y02T10/24
摘要： An exhaust emission control device is used for an engine and is applied to an exhaust gas purifying system. The system has an NOx catalyst disposed in an exhaust passage of the engine to promote selective purification of NOx in exhaust gas performed by ammonia, which is a reducing agent for reducing NOx, and a reducing agent adding device for adding the reducing agent to an upstream side of the catalyst in a flow direction of exhaust gas. The device includes a catalyst temperature detecting device for detecting temperature of the catalyst, a reaction ratio calculating device for calculating a reaction ratio, which is a ratio of a reaction amount of ammonia to a reaction amount of NOx in the catalyst, based on the temperature of the catalyst, and an ammonia consumed amount calculating device for calculating a consumed amount of ammonia in the catalyst based on the reaction ratio
摘要翻译： 废气排放控制装置用于发动机，并被应用于废气净化系统。 该系统具有设置在发动机的排气通道中的NOx催化剂，以促进由作为还原NOx的还原剂的氨进行的废气中的NOx的选择性净化，以及用于将还原剂添加到上游的还原剂添加装置 在废气的流动方向上的催化剂侧。 该装置包括用于检测催化剂的温度的催化剂温度检测装置，用于计算反应比的反应比计算装置，其是氨的反应量与催化剂中的NOx的反应量的比例，基于温度 以及氨消耗量计算装置，用于根据反应比计算催化剂中氨的消耗量
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公开(公告)号：US20090288397A1
公开(公告)日：2009-11-26
申请号：US12470917
申请日：2009-05-22
CPC分类号： F01N3/208 , F01N9/00 , F01N13/009 , F01N2560/06 , F01N2570/18 , F01N2610/02 , F01N2900/1402 , F01N2900/1602 , F01N2900/1622 , Y02T10/24 , Y02T10/47
摘要： An SCR catalyst is provided in an exhaust pipe of an engine and a urea solution addition valve is provided upstream of the SCR catalyst in the exhaust pipe. An ECU controls urea solution addition quantity of the urea solution addition valve based on ammonia adsorption quantity to the SCR catalyst. The ECU calculates the ammonia adsorption quantity in the SCR catalyst based on time-series data of an ammonia balance between ammonia supply to the SCR catalyst accompanying the urea solution addition of the urea solution addition valve and ammonia consumption in the SCR catalyst. The ECU calculates NOx quantity introduced into the SCR catalyst or a parameter correlated with the NOx quantity and performs initialization of the ammonia adsorption quantity at timing decided based on a result of the calculation.
摘要翻译： 在发动机的排气管中设置SCR催化剂，在排气管中的SCR催化剂的上游设置有尿素溶液添加阀。 ECU根据对SCR催化剂的氨吸附量控制尿素溶液添加阀的尿素溶液添加量。 ECU根据伴随尿素溶液添加阀的尿素溶液添加的氨催化剂的氨供应量与SCR催化剂中的氨消耗量之间的氨余量的时间序列数据，计算SCR催化剂中的氨的吸附量。 ECU计算引入SCR催化剂的NOx量或与NOx量相关的参数，并且在基于计算结果确定的定时进行氨吸附量的初始化。
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公开(公告)号：US08201397B2
公开(公告)日：2012-06-19
申请号：US12470917
申请日：2009-05-22
IPC分类号： F01N3/00
CPC分类号： F01N3/208 , F01N9/00 , F01N13/009 , F01N2560/06 , F01N2570/18 , F01N2610/02 , F01N2900/1402 , F01N2900/1602 , F01N2900/1622 , Y02T10/24 , Y02T10/47
摘要： An SCR catalyst is provided in an exhaust pipe of an engine and a urea solution addition valve is provided upstream of the SCR catalyst in the exhaust pipe. An ECU controls urea solution addition quantity of the urea solution addition valve based on ammonia adsorption quantity to the SCR catalyst. The ECU calculates the ammonia adsorption quantity in the SCR catalyst based on time-series data of an ammonia balance between ammonia supply to the SCR catalyst accompanying the urea solution addition of the urea solution addition valve and ammonia consumption in the SCR catalyst. The ECU calculates NOx quantity introduced into the SCR catalyst or a parameter correlated with the NOx quantity and performs initialization of the ammonia adsorption quantity at timing decided based on a result of the calculation.
摘要翻译： 在发动机的排气管中设置SCR催化剂，在排气管中的SCR催化剂的上游设置有尿素溶液添加阀。 ECU根据对SCR催化剂的氨吸附量控制尿素溶液添加阀的尿素溶液添加量。 ECU根据伴随尿素溶液添加阀的尿素溶液添加的氨催化剂的氨供应量与SCR催化剂中的氨消耗量之间的氨余量的时间序列数据，计算SCR催化剂中的氨的吸附量。 ECU计算引入SCR催化剂的NOx量或与NOx量相关的参数，并且在基于计算结果确定的定时进行氨吸附量的初始化。
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公开(公告)号：US20090293459A1
公开(公告)日：2009-12-03
申请号：US12476563
申请日：2009-06-02
CPC分类号： F01N3/208 , F01N2560/026 , F01N2560/06 , F01N2610/02 , Y02T10/24
摘要： An SCR catalyst is provided in an exhaust pipe of an engine and a urea solution addition valve is provided upstream of the SCR catalyst in the exhaust pipe. An ECU calculates ammonia adsorption quantity of the SCR catalyst and controls urea solution addition quantity, which is added by the urea solution addition valve, based on the ammonia adsorption quantity. The ECU obtains temperature of the SCR catalyst or temperature information correlated with the temperature through measurement or estimation. The ECU switches an execution mode of the urea solution addition control based on the catalyst temperature or the temperature information. Thus, reducing agent addition control can be performed suitably and eventually NOx purification in a NOx catalyst (i.e., SCR catalyst) can be performed suitably.
摘要翻译： 在发动机的排气管中设置SCR催化剂，在排气管中的SCR催化剂的上游设置有尿素溶液添加阀。 ECU计算SCR催化剂的氨吸附量，并根据氨吸附量控制尿素溶液添加阀添加的尿素溶液添加量。 ECU通过测量或估计获得SCR催化剂的温度或与温度相关的温度信息。 ECU根据催化剂温度或温度信息切换尿素溶液添加控制的执行模式。 因此，可以适当地进行还原剂添加控制，并且可以适当地进行NOx催化剂（即SCR催化剂）的NOx净化。
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公开(公告)号：US08209966B2
公开(公告)日：2012-07-03
申请号：US12465958
申请日：2009-05-14
IPC分类号： F01N3/00
CPC分类号： F01N3/208 , F01N13/009 , F01N2610/02 , F01N2610/146 , F01N2900/1402 , F01N2900/1602 , F01N2900/1621 , F01N2900/1622 , Y02T10/24
摘要： An exhaust emission control device is used for an engine and is applied to an exhaust gas purifying system. The system has an NOx catalyst disposed in an exhaust passage of the engine to promote selective purification of NOx in exhaust gas performed by ammonia, which is a reducing agent for reducing NOx, and a reducing agent adding device for adding the reducing agent to an upstream side of the catalyst in a flow direction of exhaust gas. The device includes a catalyst temperature detecting device for detecting temperature of the catalyst, a reaction ratio calculating device for calculating a reaction ratio, which is a ratio of a reaction amount of ammonia to a reaction amount of NOx in the catalyst, based on the temperature of the catalyst, and an ammonia consumed amount calculating device for calculating a consumed amount of ammonia in the catalyst based on the reaction ratio.
摘要翻译： 废气排放控制装置用于发动机，并被应用于废气净化系统。 该系统具有设置在发动机的排气通道中的NOx催化剂，以促进由作为还原NOx的还原剂的氨进行的废气中的NOx的选择性净化，以及用于将还原剂添加到上游的还原剂添加装置 在废气的流动方向上的催化剂侧。 该装置包括用于检测催化剂的温度的催化剂温度检测装置，用于计算反应比的反应比计算装置，其是氨的反应量与催化剂中的NOx的反应量的比例，基于温度 以及氨消耗量计算装置，用于根据反应比计算催化剂中氨的消耗量。
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公开(公告)号：US08176730B2
公开(公告)日：2012-05-15
申请号：US12476563
申请日：2009-06-02
IPC分类号： F01N3/00
CPC分类号： F01N3/208 , F01N2560/026 , F01N2560/06 , F01N2610/02 , Y02T10/24
摘要： An SCR catalyst is provided in an exhaust pipe of an engine and a urea solution addition valve is provided upstream of the SCR catalyst in the exhaust pipe. An ECU calculates ammonia adsorption quantity of the SCR catalyst and controls urea solution addition quantity, which is added by the urea solution addition valve, based on the ammonia adsorption quantity. The ECU obtains temperature of the SCR catalyst or temperature information correlated with the temperature through measurement or estimation. The ECU switches an execution mode of the urea solution addition control based on the catalyst temperature or the temperature information. Thus, reducing agent addition control can be performed suitably and eventually NOx purification in a NOx catalyst (i.e., SCR catalyst) can be performed suitably.
摘要翻译： 在发动机的排气管中设置SCR催化剂，在排气管中的SCR催化剂的上游设置有尿素溶液添加阀。 ECU计算SCR催化剂的氨吸附量，并根据氨吸附量控制尿素溶液添加阀添加的尿素溶液添加量。 ECU通过测量或估计获得SCR催化剂的温度或与温度相关的温度信息。 ECU根据催化剂温度或温度信息切换尿素溶液添加控制的执行模式。 因此，可以适当地进行还原剂添加控制，并且可以适当地进行NOx催化剂（即SCR催化剂）的NOx净化。
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9.发明授权Exhaust gas control apparatus and control method for exhaust gas control apparatus 有权废气控制装置及排气控制装置的控制方法公开(公告)号：US09297287B2
公开(公告)日：2016-03-29
申请号：US13824856
申请日：2011-09-21
申请人： Shinya Hirota , Shunsuke Toshioka , Akira Mikami , Koichiro Fukuda , Sakutaro Hoshi , Takashi Endo , Ryoichi Hibino , Matsuei Ueda , Akihiko Asano , Takafumi Yamauchi , Akira Shichi , Makoto Koike , Masatoshi Maruyama , Masakazu Sakata
发明人： Shinya Hirota , Shunsuke Toshioka , Akira Mikami , Koichiro Fukuda , Sakutaro Hoshi , Takashi Endo , Ryoichi Hibino , Matsuei Ueda , Akihiko Asano , Takafumi Yamauchi , Akira Shichi , Makoto Koike , Masatoshi Maruyama , Masakazu Sakata
CPC分类号： F01N3/08 , F01N3/208 , F01N2560/026 , F01N2560/06 , F01N2610/02 , F01N2610/146 , F01N2900/0406 , F01N2900/1402 , F01N2900/1602 , F01N2900/1616 , F01N2900/1622 , Y02T10/24
摘要： An exhaust gas control apparatus includes a control device controlling a urea addition valve for adding urea from an upstream side of a NOx reduction catalyst. The control device obtains an ammonia adsorption amount distribution through the NOx reduction catalyst. When an ammonia adsorption amount in a predetermined part on a downstream side equals or exceeds a predetermined threshold, the control device controls the urea addition valve to stop the urea supply or reduce the amount thereof. The urea addition valve is controlled based on an adsorption amount distribution obtained from a model on which the catalyst is divided into cells such that an ammonia adsorption amount in a first cell positioned furthest upstream equals or exceeds a predetermined threshold close to a saturation adsorption amount and an ammonia adsorption amount in a second cell positioned downstream of the first cell reaches a predetermined target value smaller than the threshold.
摘要翻译： 排气控制装置包括控制尿素添加阀的控制装置，用于从NOx还原催化剂的上游侧添加尿素。 控制装置通过NOx还原催化剂获得氨吸附量分布。 当下游侧的规定部位的氨吸附量等于或超过预定阈值时，控制装置控制尿素添加阀停止尿素供给或减少其量。 基于从将催化剂分成细胞的模型获得的吸附量分布来控制尿素添加阀，使得位于最上游的第一单元中的氨吸附量等于或超过接近饱和吸附量的预定阈值， 位于第一单元下游的第二单元中的氨吸附量达到小于阈值的预定目标值。
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10.发明申请EXHAUST GAS CONTROL APPARATUS AND CONTROL METHOD FOR EXHAUST GAS CONTROL APPARATUS 有权用于排气控制装置的排气控制装置和控制方法公开(公告)号：US20130247543A1
公开(公告)日：2013-09-26
申请号：US13824856
申请日：2011-09-21
申请人： Shinya Hirota , Shunsuke Toshioka , Akira Mikami , Koichiro Fukuda , Sakutaro Hoshi , Takashi Endo , Ryoichi Hibino , Matsuei Ueda , Akihiko Asano , Takafumi Yamauchi , Akira Shichi , Makoto Koike , Masatoshi Maruyama , Masakazu Sakata
发明人： Shinya Hirota , Shunsuke Toshioka , Akira Mikami , Koichiro Fukuda , Sakutaro Hoshi , Takashi Endo , Ryoichi Hibino , Matsuei Ueda , Akihiko Asano , Takafumi Yamauchi , Akira Shichi , Makoto Koike , Masatoshi Maruyama , Masakazu Sakata
IPC分类号： F01N3/08
CPC分类号： F01N3/08 , F01N3/208 , F01N2560/026 , F01N2560/06 , F01N2610/02 , F01N2610/146 , F01N2900/0406 , F01N2900/1402 , F01N2900/1602 , F01N2900/1616 , F01N2900/1622 , Y02T10/24
摘要： An exhaust gas control apparatus includes a control device controlling a urea addition valve for adding urea from an upstream side of a NOx reduction catalyst. The control device obtains an ammonia adsorption amount distribution through the NOx reduction catalyst. When an ammonia adsorption amount in a predetermined part on a downstream side equals or exceeds a predetermined threshold, the control device controls the urea addition valve to stop the urea supply or reduce the amount thereof. The urea addition valve is controlled based on an adsorption amount distribution obtained from a model on which the catalyst is divided into cells such that an ammonia adsorption amount in a first cell positioned furthest upstream equals or exceeds a predetermined threshold close to a saturation adsorption amount and an ammonia adsorption amount in a second cell positioned downstream of the first cell reaches a predetermined target value smaller than the threshold.
摘要翻译： 排气控制装置包括控制尿素添加阀的控制装置，用于从NOx还原催化剂的上游侧添加尿素。 控制装置通过NOx还原催化剂获得氨吸附量分布。 当下游侧的规定部位的氨吸附量等于或超过预定阈值时，控制装置控制尿素添加阀停止尿素供给或减少其量。 基于从将催化剂分成细胞的模型获得的吸附量分布来控制尿素添加阀，使得位于最上游的第一单元中的氨吸附量等于或超过接近饱和吸附量的预定阈值， 位于第一单元下游的第二单元中的氨吸附量达到小于阈值的预定目标值。
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