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    • 5. 发明公开
    • EXHAUST GAS PURIFYING DEVICE FOR INTERNAL COMBUSTION ENGINE
    • 内燃机排气净化装置
    • EP2428658A1
    • 2012-03-14
    • EP09844349.2
    • 2009-05-07
    • Toyota Jidosha Kabushiki Kaisha
    • YOSHIDA, KoheiASANUMA, TakamitsuIIDA, MasahideSOBUE, Yuichi
    • F01N3/20
    • F02D41/028F01N3/035F01N3/0842F01N3/0885F01N3/106F02D2200/0818
    • An exhaust purification system of an internal combustion engine includes an NO X storage reduction catalyst device which is arranged in an engine exhaust passage. The NO X storage reduction catalyst device stores SO X simultaneously with NO X . When the stored SO X amount exceeds a predetermined allowable amount, the SO X is made to be released by SO X release control which raises the temperature of the NO X catalyst device to the SO X releasable temperature, then makes the air-fuel ratio of the exhaust gas which flows into the NO X catalyst device the stoichiometric air-fuel ratio or rich. The NO X catalyst device has a residual SO X storage amount which finally remains even if performing SO X release control depending on the temperature of the NO X catalyst device when performing SO X release control. The system uses the residual SO X storage amount of the current SO X release control as the basis to calculate the SO X release speed at each timing in the current SO X release control.
    • 内燃机的排气净化装置具备配置在内燃机排气通路内的NOx吸留还原催化剂装置。 NOX储存还原催化剂装置与NOX同时储存SOX。 当所储存的SOX量超过预定允许量时,通过将NOX催化剂装置的温度升高到SOX可释放温度的SOX释放控制使SOX释放,然后使流过的废气的空燃比 进入NOX催化剂装置的化学计量空燃比或浓。 即使在进行SOX释放控制时根据NOX催化剂装置的温度进行SOX释放控制,NOX催化剂装置也具有最终残留的SOX残存量。 系统使用当前SOX释放控制的剩余SOX存储量作为计算当前SOX释放控制中每个定时的SOX释放速度的基础。