发明授权
- 专利标题： Air/fuel ratio variation abnormality detection apparatus, and abnormality detection method
- 专利标题（中）： 空气/燃料比变化异常检测装置和异常检测方法
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申请号： US13455812申请日： 2012-04-25
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公开(公告)号： US08548718B2公开(公告)日： 2013-10-01
- 发明人: Toshihiro Kato , Isao Nakajima , Yoshihisa Oda , Takefumi Uchida
- 申请人： Toshihiro Kato , Isao Nakajima , Yoshihisa Oda , Takefumi Uchida
- 申请人地址： JP Toyota-shi
- 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
- 代理机构： Gifford, Krass, Sprinkle, Anderson & Citkowski, P.C.
- 优先权： JP2011-101687 20110428
- 主分类号： F02D41/22
- IPC分类号： F02D41/22
摘要：
In an abnormality detection apparatus and an abnormality detection method for a construction in which each of cylinders is provided with a plurality of fuel injection valves, if it is discerned that a cause of the inter-cylinder variation abnormality exists in one of the fuel injection valves, an air/fuel ratio fluctuation parameter as an index value that represents the degree of the abnormality is calculated by normalizing the air/fuel ratio fluctuation parameter regarding that fuel injection valve on the basis of the injection proportion used when the parameter is measured.
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