发明名称 |
AIR-FUEL RATIO CONTROL DEVICE |
摘要 |
An air-fuel ratio control device is provided for controlling the air-fuel ratio of an engine. The device includes an exhaust passage having a main catalytic converter and a bypass passage having a bypass catalytic converter, the bypass passage diverging from the exhaust passage at an upstream junction and rejoining the exhaust passage at a downstream junction. A valve mechanism disposed in the exhaust passage between the upstream junction and the downstream junction moves between a closed state and an open state. During a predetermined period of time after the valve mechanism opens to permit flow in the exhaust passage, the air-fuel ratio of the engine is controlled based on a signal from a first air-fuel ratio sensor in the bypass passage using a low response correction value that is less than a normal response correction value that would be used when the valve mechanism is closed. |
申请公布号 |
US2012117950(A1) |
申请公布日期 |
2012.05.17 |
申请号 |
US201213357221 |
申请日期 |
2012.01.24 |
申请人 |
OOTAKE YOSHIYUKI;ISHIZUKA YASUJI;KOGA MASAKI;NISSAN MOTOR CO., LTD. |
发明人 |
OOTAKE YOSHIYUKI;ISHIZUKA YASUJI;KOGA MASAKI |
分类号 |
F01N9/00;F01N3/18 |
主分类号 |
F01N9/00 |
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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