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    • 52. 发明授权
    • DEVICE FOR DETECTING SULFUR COMPONENT
    • 设备技术检测硫组分
    • EP2570801B1
    • 2014-09-03
    • EP10851422.5
    • 2010-05-12
    • TOYOTA JIDOSHA KABUSHIKI KAISHA
    • OTSUKI, HiroshiNISHIOKA, HiromasaOSHIKAWA, KatsuhikoTSUKAMOTO, YoshihisaMATSUO, Junichi
    • G01N25/48
    • G01N33/0042B01D53/9431G01N25/4873Y02A50/248
    • The present detector for detecting sulfur components comprises a storage portion for storing SO x and NO x in the exhaust gas passing through an exhaust passage, in which the more an amount of stored SO x increases, the more an amount of NO x that can be stored decreases, and which releases only the stored NO x and reduces the released NO x when the air-fuel ratio in the exhaust gas is made stoichiometric or rich, and a temperature sensor for measuring a temperature of the storage portion, measures an increase in the temperature of the storage portion in the reducing reaction of the released NO x by the temperature sensor, calculates a quantity of heat generated in the reducing reaction of the released NO x on the basis of the measured increase in the temperature and heat capacity of the storage portion so that an amount of released NO x that corresponds to the amount of NO x that can be stored is calculated in order to estimate a current amount of stored SO x , and detects an integrated amount of SO x passing through the exhaust passage in a given period or a value on the basis of the integrated amount. The detector comprises a heater for heating the storage portion and determines the current heat capacity (C) of the storage portion on the basis of an increase in (T2-T1) the temperature of the storage portion measured by the temperature sensor and a quantity of heat (QH) generated by the heater (step 209) when the heater heats the storage portion. (step 204)