发明名称 |
Air-fuel ratio control system and method for internal combustion engine |
摘要 |
An air-fuel ratio control system includes: a catalyst; an A/F sensor provided upstream of the catalyst; an oxygen concentration sensor provided downstream of the catalyst; an output value estimation portion that estimates the output value of the oxygen concentration sensor using a model related to the catalyst and the oxygen concentration sensor; an integral value calculation portion that calculates an integral value of deviation being updated by integrating the difference between the actual oxygen concentration output value and the estimated output value; a correction value calculation portion that calculates a feedback correction value for the output value of the A/F sensor and a target air-fuel ratio at least based on the integral value of deviation; and an air-fuel ratio control portion that zeros a first deviation that is obtained by correcting the difference between the detected air-fuel ratio and the target air-fuel ratio, using the feedback correction value.
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申请公布号 |
US7654252(B2) |
申请公布日期 |
2010.02.02 |
申请号 |
US20070869129 |
申请日期 |
2007.10.09 |
申请人 |
TOYOTA JIDOSHA KABUSHIKI KAISHA |
发明人 |
KATO NAOTO;OKAZAKI SHUNTARO |
分类号 |
F02D41/14 |
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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