发明名称 |
METHOD AND APPARATUS FOR EXHAUST GAS CONTROL OF AN INTERNAL COMBUSTION ENGINE |
摘要 |
<p>An exhaust gas control apparatus for an internal combustion engine includes: a NOx purification catalyst arranged in an exhaust passage of the internal combustion engine; a degradation degree estimating unit estimating a degradation degree of the NOx purification catalyst; and an air-fuel ratio control unit adjusting an air-fuel ratio of exhaust gas flowing into the NOx purification catalyst, wherein, until the estimated degradation degree of the NOx purification catalyst reaches a predetermined degradation degree, the air-fuel ratio control unit adjusts the air-fuel ratio of the exhaust gas to a rich air-fuel ratio, and, when the estimated degradation degree of the NOx purification catalyst exceeds the predetermined degradation degree, the air-fuel ratio control unit changes the air-fuel ratio of the exhaust gas from the rich air-fuel ratio to a lean air-fuel ratio so that the NOx purification catalyst is regenerated.</p> |
申请公布号 |
EP2739838(B1) |
申请公布日期 |
2015.03.04 |
申请号 |
EP20120728317 |
申请日期 |
2012.05.30 |
申请人 |
TOYOTA JIDOSHA KABUSHIKI KAISHA |
发明人 |
WATANABE, MASAO;TAKAGI, SHIGEHARU;KISHITA, KEISUKE;OTAKE, NOBORU;MORIKAWA, AKIRA;HIROSE, TAKUTO;NAGAI, YASUTAKA |
分类号 |
F02D41/00 |
主分类号 |
F02D41/00 |
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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