Method for regeneration of diesel soot filtering device

Abstract

A method for regeneration of a diesel soot-filtering device includes the steps of inputting a flow resistance value that varies depending upon the amount of soot accumulated in the soot-filtering device; calculating the accumulated mileage and the flow resistance value (K); primarily compulsorily regenerating the diesel soot-filtering device if the mileage falls within a range from 200 to 10,000 km; and secondarily compulsorily regenerating the diesel soot-filtering device if the flow resistance value (K) falls within a range from 0.001 to 0.07.

1 . A method for regeneration of a diesel engine soot-filtering device for a vehicle comprising: 
 inputting a flow resistance value that varies depending upon the amount of soot accumulated in the soot-filtering device regardless of a condition of the engine and the vehicle, an accumulated mileage of the vehicle, and a total volume of the exhaust gas to an ECU;    calculating the accumulated mileage and the flow resistance value (K) by the ECU;    primarily compulsorily regenerating the diesel soot-filtering device if the mileage falls within a range from 200 to 10,000 km; and    secondarily compulsorily regenerating the diesel soot-filtering device if the flow resistance value (K) falls within a range from 0.001 to 0.07.    
   
   
       2 . The method according to  claim 1 , further comprising: 
 primarily compulsorily regenerating the diesel soot-filtering device if the mileage is more than 1,000 km; and    secondarily compulsorily regenerating the diesel soot-filtering device if the flow resistance value (K) is more than 0.003.    
   
   
       3 . The method according to  claim 1 , wherein the primary compulsory regeneration of the diesel soot-filtering device is performed in a condition where only some of soot can be burnt at an intermediate temperature of from 550° C. to 600° C., and then the secondary compulsory regeneration of the diesel soot-filtering device is performed at a high temperature of 600° C. to 650° C.  
   
   
       4 . The method according to  claim 1 , wherein the flow resistance value comprises a value obtained by dividing a difference between pressures at a front and a rear end of the diesel soot-filtering device by a flow rate of exhaust gas