Method for regenerating a diesel particle filter

Abstract

A method for regenerating a diesel particle filter ( 18 ) of an exhaust system in which an exhaust gas flow from a diesel engine is fed through the diesel particle filter ( 18 ). The system further includes at least one of a burner ( 34 ) for heating up the exhaust gas flow, a controllable air supply ( 36 ) and a metering device ( 40 ) for introducing hydrocarbons into the exhaust gas flow being fed to the diesel particle filter ( 18 ). The method includes registering at least one of an exhaust gas temperature and an oxygen content of the exhaust gas at least one of upstream and downstream of the diesel particle filter ( 18 ), selecting and activating at least one of the burner ( 34 ), the air supply ( 36 ) and the metering device ( 40 ), and controlling the selected component as a function of the registered at least one of exhaust gas temperature and oxygen content.

1 . A method for regenerating a diesel particle filter ( 18 ) of an exhaust system in which an exhaust gas flow from a diesel engine is fed through the diesel particle filter ( 18 ), the system further including at least one of a burner ( 34 ) for heating up the exhaust gas flow, a controllable air supply ( 36 ), and a metering device ( 40 ) for introducing hydrocarbons into the exhaust gas flow being fed to the diesel particle filter ( 18 ), the method comprising:
 registering at least one of an exhaust gas temperature and an oxygen content of the exhaust gas at least one of upstream and downstream of the diesel particle filter ( 18 );   selecting and activating at least one of the burner ( 34 ), the air supply ( 36 ) and the metering device ( 40 ); and   controlling the selected at least one of the burner ( 34 ), the air supply ( 36 ) and the metering device ( 40 ) as a function of the registered at least one of exhaust gas temperature and oxygen content.   
     
     
         2 . The method according to  claim 1 , characterized in that a diesel oxidation catalytic converter ( 16 ) is arranged in series with the diesel particle filter ( 18 ), and in that, in the method, the at least one of the exhaust gas temperature and the oxygen content is registered at least one of upstream and downstream of the diesel oxidation catalytic converter ( 16 ). 
     
     
         3 . The method according to  claim 2 , characterized in that the selected and activated at least one of the burner ( 34 ), the air supply ( 36 ) and the metering device ( 40 ) act upon the exhaust gas flow at least one of upstream of the diesel oxidation catalytic converter ( 16 ) and upstream of the diesel particle filter ( 18 ). 
     
     
         4 . The method according to  claim 2 , characterized in that the selected and activated at least one of the burner ( 34 ), the air supply ( 36 ) and the metering device ( 40 ) are incorporated in at least one of the diesel oxidation catalytic converter ( 16 ) and the diesel particle filter ( 18 ). 
     
     
         5 . The method according to  claim 1 , characterized in that selecting and activating includes selecting and activating the air supply ( 36 ). 
     
     
         6 . The method according to  claim 1 , characterized in that selecting and activating includes selecting and activating the burner ( 34 ) and the air supply ( 36 ). 
     
     
         7 . The method according to  claim 1 , characterized in that selecting and activating includes selecting and activating the metering device ( 40 ) and the air supply ( 36 ). 
     
     
         8 . The method according to  claim 1 , characterized in that selecting and activating includes selecting and activating the burner ( 34 ), the air supply ( 36 ) and the metering device ( 40 ). 
     
     
         9 . The method according to  claim 1 , characterized in that during a regeneration of the diesel particle filter ( 18 ) the at least one of the burner ( 34 ), the air supply ( 36 ) and the metering device ( 40 ) are used successively in at least one of different combinations, at different levels, and in different quantities. 
     
     
         10 . An exhaust gas system comprising:
 a diesel particle filter ( 18 ) through which an exhaust gas flow from a diesel engine is fed;   at least one of a burner ( 34 ) for heating up the exhaust gas flow, a controllable air supply ( 36 ), and a metering device ( 40 ) for introducing hydrocarbons into the exhaust gas flow being fed to the diesel particle filter ( 18 ); and   means for detecting at least one of an exhaust gas temperature and an oxygen content of the exhaust gas at least one of upstream and downstream of the diesel particle filter ( 18 );   wherein operation of the at least one of the burner ( 34 ), the air supply ( 36 ), and the metering device ( 40 ) is controlled as a function of the detected at least one of exhaust gas temperature and oxygen content.   
     
     
         11 . The exhaust gas system according to  claim 10 , characterized in that the burner ( 34 ) is a flame burner. 
     
     
         12 . The exhaust gas system according to  claim 10 , characterized in that the air supply ( 36 ) is structurally integrated into the metering device ( 40 ). 
     
     
         13 . The exhaust gas system according to  claim 10 , characterized in that the burner ( 34 ) and the metering device ( 40 ) are structurally integrated. 
     
     
         14 . The exhaust gas system according to  claim 10 , characterized in that the air supply ( 36 ) is a blower. 
     
     
         15 . The exhaust gas system according to  claim 10 , characterized in that the system further includes a diesel oxidation catalytic converter ( 16 ) arranged in series with the diesel particle filter ( 18 ).