Patent ID: 8555699
Filing Date: 2013-10-15
Classification: B01D,G01N,Y02A

Abstract:
1. A detector for detecting sulfur components comprising 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 said storage portion, measuring an increase in the temperature of said storage portion in the reducing reaction of the released NO X by said temperature sensor, calculating 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 said 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 detecting an integrated amount of SO X passing through said exhaust passage in a given period or a value on the basis of said integrated amount, wherein said detector comprises a heater for heating said storage portion and determines the current heat capacity of said storage portion on the basis of an increase in the temperature of said storage portion measured by said temperature sensor and a quantity of heat generated by said heater when said heater heats said storage portion.