发明名称 |
EXHAUST GAS CLEANER FOR INTERNAL COMBUSTION ENGINE |
摘要 |
In an engine, a hydrocarbon feed valve (15) and an exhaust purification catalyst (13) are arranged in the engine exhaust passage. A first NO x purification method which injects hydrocarbons from the hydrocarbon feed valve (15) by a predetermined period to thereby remove NO x which is contained in the exhaust gas and a second NO x purification method which makes the air-fuel ratio of the exhaust gas which flows into the exhaust purification catalyst (13) rich to make the exhaust purification catalyst (13) release the stored NO x when the NO x which is stored in the exhaust purification catalyst (13) exceeds a first allowable value are selectively used. Hydrocarbons are injected from the hydrocarbon feed valve (15) by the predetermined period, and when the NO x which is stored in the exhaust purification catalyst (13) exceeds a second allowable value which is smaller than the first allowable value, the air-fuel ratio of the exhaust gas which flows into the exhaust purification catalyst (13) is made rich. |
申请公布号 |
EP2955348(A1) |
申请公布日期 |
2015.12.16 |
申请号 |
EP20130780046 |
申请日期 |
2013.02.05 |
申请人 |
TOYOTA JIDOSHA KABUSHIKI KAISHA |
发明人 |
HABA, YUKI;YOSHIDA, KOHEI |
分类号 |
F01N3/08;F01N3/20;F02D41/02;F02D41/04;F02D41/14 |
主分类号 |
F01N3/08 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|