发明名称 |
CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE |
摘要 |
This control device for an internal combustion engine includes: an exhaust purification catalyst (20) that is provided in an exhaust passage of the internal combustion engine; a downstream air-fuel ratio sensor (41) that is provided downstream of the exhaust purification catalyst; and an air-fuel ratio control device that controls such that the air-fuel ratio of exhaust gas flowing into the exhaust purification catalyst reaches a target air-fuel ratio. The downstream air-fuel ratio sensor is configured such that the applied voltage thereof at which the output current becomes zero decreases as the exhaust air-fuel ratio increases. If the target air-fuel ratio is richer than the reference air-fuel ratio, the voltage applied to the downstream air-fuel ratio sensor is set to a higher voltage than the voltage at which the output current becomes zero when the exhaust air-fuel ratio is the stoichiometric air-fuel ratio. If the target air-fuel ratio is leaner than the reference air-fuel ratio, the voltage applied to the downstream air-fuel ratio sensor is set to a lower voltage than the voltage at which the output current becomes zero when the exhaust air-fuel ratio is the stoichiometric air-fuel ratio. A control device for an internal combustion engine using an air-fuel ratio sensor that can reliably detect when the absolute value of the exhaust air-fuel ratio reaches a prescribed air-fuel ratio richer than the stoichiometric air-fuel ratio is thus provided. |
申请公布号 |
EP2952717(A1) |
申请公布日期 |
2015.12.09 |
申请号 |
EP20130873842 |
申请日期 |
2013.07.08 |
申请人 |
TOYOTA JIDOSHA KABUSHIKI KAISHA |
发明人 |
AOKI, KEIICHIRO |
分类号 |
F02D41/14;F02D41/02;F02D41/12;G01N27/407 |
主分类号 |
F02D41/14 |
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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