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公开(公告)号：US08256211B2
公开(公告)日：2012-09-04
申请号：US12598204
申请日：2009-02-06
申请人： Shinya Asaura , Tomihisa Oda , Shunsuke Toshioka , Yutaka Tanai
发明人： Shinya Asaura , Tomihisa Oda , Shunsuke Toshioka , Yutaka Tanai
CPC分类号： F01N3/2066 , B01D53/90 , B01D53/9431 , B01D2251/2067 , F01N3/208 , F01N2610/02 , F01N2610/06 , F01N2610/10 , F01N2610/14 , F01N2610/1406 , F01N2610/144 , F01N2610/1473 , Y02T10/24
摘要： An internal combustion engine wherein when an aqueous urea solution should be fed from an aqueous urea solution feed valve (8), a feed pump (9) is operated forward and aqueous urea solution in an aqueous urea solution tank (4) is fed through an aqueous urea solution feed passage (10) into the aqueous urea solution feed valve (8). When ceasing the feed of aqueous urea solution from the aqueous urea solution feed valve (8), the feed pump (9) is operated in reverse whereby the ammonia gas generated in the aqueous urea solution tank (4) is drawn through a ammonia gas feed pipe (11) into the aqueous urea solution feed passage (10). Next, when the feed pump (9) is operated forward, the ammonia gas drawn into the aqueous urea solution feed path (10) is ejected from the aqueous urea solution feed valve (8).
摘要翻译： 一种内燃机，其特征在于，当从尿素水溶液供给阀（8）供给尿素水溶液时，进料泵（9）向前方运动，尿素水溶液罐（4）中的尿素水溶液通过 尿素水溶液供给通道（10）进入尿素水溶液供给阀（8）。 当从尿素水溶液供给阀（8）停止供给尿素水溶液时，进料泵（9）反向运转，由此在尿素水溶液罐（4）中产生的氨气通过氨气进料 管道（11）进入尿素水溶液供给通道（10）。 接下来，当供给泵（9）向前运转时，从尿素水溶液供给阀（8）喷出被尿素溶液供给路径（10）吸入的氨气。
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公开(公告)号：US20150143801A1
公开(公告)日：2015-05-28
申请号：US14409729
申请日：2012-06-22
申请人： Shinya Asaura
发明人： Shinya Asaura
CPC分类号： F01N3/2066 , B01D53/9409 , B01D53/9495 , B01D2251/2067 , B01D2257/404 , B01D2258/012 , F01N3/208 , F01N11/00 , F01N2550/02 , F01N2560/026 , F01N2610/146 , Y02A50/2325 , Y02T10/24 , Y02T10/47
摘要： An object of the present invention is to detect deterioration of a selective reduction type catalyst early and improve a detection precision in a deterioration detection system for an exhaust gas purification apparatus including a selective reduction type catalyst disposed in an exhaust passage of an internal combustion engine, a reducing agent adding valve disposed in the exhaust passage upstream of the selective reduction type catalyst, and a NOx sensor disposed in the exhaust passage downstream of the selective reduction type catalyst. To achieve this object, in the deterioration detection system for an exhaust gas purification apparatus according to the present invention, during control for causing the reducing agent adding valve to add a reducing agent, the reducing agent adding valve is controlled in order to modify a reducing agent addition interval thereof while keeping an addition amount per fixed time period constant. Deterioration of the selective reduction type catalyst is then determined on the basis of a difference in a NOx purification ratio before and after modification of the addition interval.
摘要翻译： 本发明的目的是提前检测选择还原型催化剂的劣化，并提高包括设置在内燃机的排气通道中的选择还原型催化剂的废气净化装置的劣化检测系统的检测精度， 设置在选择还原型催化剂上游的排气通道中的还原剂添加阀和设置在选择还原型催化剂下游的排气通道中的NOx传感器。 为了实现上述目的，在本发明的排气净化装置的劣化检测系统中，在使还原剂添加阀添加还原剂的控制中，控制还原剂添加阀， 同时保持每固定时间段的添加量恒定。 基于添加间隔的修改前后的NOx净化率的差异来确定选择还原型催化剂的劣化。
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公开(公告)号：US09670812B2
公开(公告)日：2017-06-06
申请号：US14409729
申请日：2012-06-22
申请人： Shinya Asaura
发明人： Shinya Asaura
CPC分类号： F01N3/2066 , B01D53/9409 , B01D53/9495 , B01D2251/2067 , B01D2257/404 , B01D2258/012 , F01N3/208 , F01N11/00 , F01N2550/02 , F01N2560/026 , F01N2610/146 , Y02A50/2325 , Y02T10/24 , Y02T10/47
摘要： An object of the present invention is to detect deterioration of a selective reduction type catalyst early and improve a detection precision in a deterioration detection system for an exhaust gas purification apparatus including a selective reduction type catalyst disposed in an exhaust passage of an internal combustion engine, a reducing agent adding valve disposed in the exhaust passage upstream of the selective reduction type catalyst, and a NOx sensor disposed in the exhaust passage downstream of the selective reduction type catalyst. To achieve this object, in the deterioration detection system for an exhaust gas purification apparatus according to the present invention, during control for causing the reducing agent adding valve to add a reducing agent, the reducing agent adding valve is controlled in order to modify a reducing agent addition interval thereof while keeping an addition amount per fixed time period constant. Deterioration of the selective reduction type catalyst is then determined on the basis of a difference in a NOx purification ratio before and after modification of the addition interval.
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