发明名称 |
EXHAUST GAS PURIFICATION DEVICE FOR INTERNAL COMBUSTION ENGINES |
摘要 |
An exhaust purifying device for an internal combustion engine which can restrict an influence of a measurement error in a NOx sensor provided at the downstream side of a catalyst and can optimally maintain a NOx purifying rate. The device comprises a catalytic converter (70) carrying a selective catalytic reduction catalyst provided in an exhaust passage (10) of the engine (1) to selectively reduce nitrogen oxides, a urea water adding valve (60) for adding urea water to the catalyst as a reducing agent, a NOx sensor (80) provided at the downstream side of the catalyst, and an ECU (100) for adjusting an addition amount of the urea water adding valve (60) based upon output of the NOx sensor (80), wherein a urea water addition amount adjusting process is executed under a condition that a NOx amount to be generated in the engine increases. |
申请公布号 |
EP2388450(B1) |
申请公布日期 |
2016.08.03 |
申请号 |
EP20090838277 |
申请日期 |
2009.01.13 |
申请人 |
TOYOTA JIDOSHA KABUSHIKI KAISHA |
发明人 |
SATO, MASAAKI;ODA, TOMIHISA;ASAURA, SHINYA;TOSHIOKA, SHUNSUKE |
分类号 |
F01N3/20;B01D53/94;F01N3/08;F01N3/10;F01N3/24 |
主分类号 |
F01N3/20 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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