发明申请
- 专利标题： INTER-CYLINDER AIR-FUEL RATIO IMBALANCE JUDGMENT DEVICE FOR MULTI-CYLINDER INTERNAL COMBUSTION ENGINE
- 专利标题（中）： 用于多缸内燃机的缸内空气燃料比例不平衡判定装置
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申请号： US13257842申请日： 2009-09-08
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公开(公告)号： US20120116651A1公开(公告)日： 2012-05-10
- 发明人: Hiroshi Miyamoto , Hiroshi Sawada , Yasushi Iwazaki , Tatsuya Tsuji , Toru Kidokoro
- 申请人： Hiroshi Miyamoto , Hiroshi Sawada , Yasushi Iwazaki , Tatsuya Tsuji , Toru Kidokoro
- 申请人地址： JP Toyota-shi, Aichi
- 专利权人： TOYOTA JIDOSHA KABUSHIKI KAISHA
- 当前专利权人： TOYOTA JIDOSHA KABUSHIKI KAISHA
- 当前专利权人地址： JP Toyota-shi, Aichi
- 国际申请： PCT/JP2009/065983 WO 20090908
- 主分类号： F02D41/30
- IPC分类号： F02D41/30
摘要：
When the intake air amount is smaller than the specific intake air amount, the unit air-fuel ratio change amount calculated during the engine operation is corrected such that the unit air-fuel ratio change amount increases in the condition that the base unit air-fuel ratio change amount is an upper limit and when the intake air amount is greater than the specific intake air amount, the unit air-fuel ratio change amount calculated during the engine operation is corrected such that the unit air-fuel ratio change amount decreases in the condition that the base unit air-fuel ratio change amount is a lower limit. When the corrected unit air-fuel ratio change amount is greater than the judgment value, it is judged that the inter-cylinder air-fuel ratio imbalance condition occurs.
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