公开(公告)号：EP2044309B1

公开(公告)日：2010-09-15

申请号：EP07768442.1

申请日：2007-07-12

申请人： Toyota Jidosha Kabushiki Kaisha

发明人： TOSHIOKA, Shunsuke ,  ASANUMA, Takamitsu ,  NARITA, Morio

IPC分类号： F02D41/02 ,  F01N3/08 ,  F01N3/20

CPC分类号： F02D41/0275 ,  F01N3/0885 ,  F01N3/106 ,  F01N11/00 ,  F01N2550/05 ,  F01N2560/025 ,  F01N2560/026 ,  F01N2560/06 ,  F01N2610/03 ,  F01N2610/1493 ,  F01N2900/0421 ,  F02B37/00 ,  F02D41/1454 ,  Y02T10/20 ,  Y02T10/47

摘要： The task for the present invention is to reduce more of an oxide that is stored in a NOx storage reduction catalyst, even in a case where a clogging has occurred in a reducing agent adding valve that is provided in an exhaust passage of an internal combustion engine. The present invention is provided with rich spike control performing means that, when an oxide that is stored in the NOx storage reduction catalyst is reduced, performs a rich spike control and that, when lowering the air-fuel ratio in the exhaust gas, performs addition of a reducing agent by the reducing agent adding valve multiple times, which is performed when a crank angle of the internal combustion engine is in a specified range. When the clogging has occurred in the reducing agent adding valve (step S102), the number of times the air-fuel ratio in the exhaust gas is lowered while the rich spike control is being performed by the rich spike control performing means is increased (step S110).

公开(公告)号：EP1148215A1

公开(公告)日：2001-10-24

申请号：EP99959861.8

申请日：1999-12-16

申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA

发明人： HIROTA, Shinya ,  TOSHIOKA, Shunsuke ,  TANAKA, Toshiaki

IPC分类号： F01N3/24 ,  F01N3/08 ,  F01N3/28

CPC分类号： F01N3/2053 ,  F01N3/0814 ,  F01N3/0835 ,  F01N3/0842 ,  F01N3/085 ,  F01N3/0878 ,  F01N3/0885 ,  F01N3/2066 ,  F01N13/009 ,  F01N13/0093 ,  F01N13/011 ,  F01N2430/085 ,  F01N2570/04 ,  F01N2570/14 ,  Y02A50/2325 ,  Y02A50/2344 ,  Y02T10/24

摘要： An object of the present invention is to improve reliability of exhaust emission purification in an exhaust emission purifying device having an NOx catalyst and an bypass path bypassing the NOx catalyst. The present invention provides an exhaust emission purifying device including an SOx absorbing material 17 provided in an exhaust passage of an internal combustion engine, a main NOx catalyst 20 provided in the exhaust passage on the downstream side of the SOx absorbing material, a bypass pipe 26 branching off from the exhaust passage at a position between the SOx absorbing material 17 and the main NOx catalyst 20, and an exhaust switching valve 28 provided at the start end of the bypass pipe 26 and adapted to switch the exhaust flow between the main NOx catalyst 20 and the bypass pipe 26, wherein a sub NOx catalyst 24 is provided in the bypass pipe 26 and wherein when the exhaust switching valve 28 is controlled so as to lead the exhaust to the main NOx catalyst 20 and as to prevent the exhaust from flowing through the bypass pipe 26, any exhaust leaking from the exhaust switching valve 28 to the bypass pipe 26 is purified by the sub NOx catalyst 24.

摘要翻译： 本发明的目的在于提高具有NOx催化剂和绕过NOx催化剂的旁通路径的排气净化装置的排气净化装置的可靠性。 本发明提供一种排气净化装置，其包括设置在内燃机的排气通路中的SOx吸收材料17，设置在SO x吸收材料的下游侧的排气通路中的主NOx催化剂20，旁通配管26 在SO x吸收材料17和主NOx催化剂20之间的位置处从排气通道分支;以及排气切换阀28，其设置在旁通管26的起始端，并且适于切换主NOx催化剂 20和旁通管26，其中副NOx催化剂24设置在旁通管26中，并且其中当排气切换阀28被控制以将排气引导到主NOx催化剂20并且为了防止排气流动 通过旁通管26，通过副NOx催化剂24净化从排气切换阀28向旁通管26泄漏的任何废气。