发明名称 |
Emission control apparatus of internal combustion engine |
摘要 |
<p>A NOx occluding member (23) that occludes NOx when the air-fuel ratio is on the fuel-lean side is disposed in an engine exhaust passage. An NOx ammonia sensor (29) is disposed in the engine exhaust passage downstream of the NOx occluding member (23). A surplus amount of a reducing agent that is not used to release NOx is determined from a change in the ammonia concentration detected by the NOx ammonia sensor (29) when the air-fuel ratio is changed to the fuel-rich side so as to release the NOx from the NOx occluding member (23). <IMAGE></p> |
申请公布号 |
EP1520972(B1) |
申请公布日期 |
2006.02.22 |
申请号 |
EP20040030958 |
申请日期 |
2001.12.05 |
申请人 |
TOYOTA JIDOSHA KABUSHIKI KAISHA |
发明人 |
IRISAWA, YASUYUKI;TANAKA, HIROSHI;KAKO, JUNICHI |
分类号 |
F02D41/02;F01N3/08;F01N9/00;F02D41/14 |
主分类号 |
F02D41/02 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|