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

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

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。

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。