发明名称 |
Exhaust gas purifying apparatus for internal combustion engine |
摘要 |
The present invention has an object to provide an exhaust gas purifying apparatus for an internal combustion engine capable of obtaining accurate temperature information relating to a catalyst placed in an exhaust passage of the internal combustion engine. The degree of influence emthc of a catalyst inlet gas temperature and catalyst rear end temperature ethuf[end] is calculated (Step 102). An estimated value ethco of an outlet gas temperature is calculated by weighted averaging the inlet gas temperature and the catalyst rear end temperature ethuf[end] considering the degree of influence emthc (Step 104). A temperature correction coefficient ekthuf[x] for each region of the catalyst is calculated as a function f(emthc) of the degree of influence emthc (Step 108). A deviation between the outlet gas temperature estimated value ethco and a measured value of the outlet gas temperature is multiplied by the temperature correction coefficient ekthuf[x] to calculate an estimated value correction amount ecthuf[x] (Step 110). The estimated value correction amount ecthuf[x] is added to a catalyst temperature estimated value (Step 114).
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申请公布号 |
US8051641(B2) |
申请公布日期 |
2011.11.08 |
申请号 |
US20060991740 |
申请日期 |
2006.10.13 |
申请人 |
TOYOTA JIDOSHA KABUSHIKI KAISHA;DENSO CORPORATION |
发明人 |
KAKO JUNICHI;SOEJIMA SHINICHI;KAYAMA RYOZO |
分类号 |
F01N3/00 |
主分类号 |
F01N3/00 |
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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