发明授权
- 专利标题： Apparatus and method for determining catalyst degradation
- 专利标题（中）： 用于确定催化剂降解的装置和方法
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申请号： US11432404申请日： 2006-05-12
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公开(公告)号： US08074441B2公开(公告)日： 2011-12-13
- 发明人: Takahiko Fujiwara
- 申请人： Takahiko Fujiwara
- 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： Kenyon & Kenyon LLP
- 优先权： JP2005-142319 20050516
- 主分类号： F01N3/00
- IPC分类号： F01N3/00
摘要：
A target air-fuel ratio of exhaust gas is changed back and forth between rich and lean in short periods, and it is determined that the catalyst is degraded when the air-fuel ratio of exhaust gas is lean by the time a predetermined period of time has passed from the time the target air-fuel ratio started to be changed.
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