System and method for regenerating a diesel particulate filter

Abstract

A system for regenerating a diesel particulate filter of the present invention includes a fixing part, a fluid supplying part, a fluid inhaling part, and a controller. The fixing part fixes a housing of a diesel oxidation catalyst-diesel particulate filter assembly. The fluid supplying part supplies a fluid of high temperature and high pressure to a rear end of the housing. The fluid inhaling part inhales the fluid from a space between the diesel oxidation catalyst and the diesel particulate filter of the housing. The controller controls the fluid supplying part such that temperature of the fluid between the diesel oxidation catalyst and the diesel particulate filter arrives at a first predetermined temperature.

1 . A system for regenerating a diesel particulate filter, comprising: 
 a fixing part for fixing a housing of a diesel oxidation catalyst-diesel particulate filter assembly;    a fluid supplying part for supplying a fluid of a high temperature and high pressure to a rear end of the housing;    a fluid intake part for taking in the fluid from a space between the diesel oxidation catalyst and the diesel particulate filter of the housing; and    a controller for controlling the fluid supplying part such that the temperature of the fluid between the diesel oxidation catalyst and the diesel particulate filter arrives at a first predetermined temperature.    
   
   
       2 . The system of  claim 1 , wherein the fluid supplying part comprises: 
 a first pipe that is connected to a pre-existing first outlet at the rear of the housing;    a burner that is disposed on the first pipe so as to increase the temperature of the fluid; and    a turbine that is disposed on the first pipe so as to discharge the fluid to the diesel particulate filter.    
   
   
       3 . The system of  claim 2 , wherein the fluid intake part comprises: 
 a second outlet that is formed at a first portion between the diesel oxidation catalyst and the diesel particulate filter of the housing;    a second pipe that is connected to the second outlet;    a pump that is disposed on the second pipe so as to take in the fluid passing through the diesel particulate filter; and    an accumulation unit part that is disposed on a rear end of the second pipe so as to accumulate the fluid.    
   
   
       4 . The system of  claim 1 , further comprising a first plug for opening and closing a pre-existing inlet at affront end of the housing.  
   
   
       5 . The system of  claim 3 , wherein the fluid intake part further comprises a second plug for opening and closing the second outlet.  
   
   
       6 . The system of  claim 3 , further comprising a first temperature sensor that is disposed at a second portion between the diesel oxidation catalyst and the diesel particulate filter of the housing.  
   
   
       7 . The system of  claim 6 , wherein the controller: 
 operates the pump, the turbine, and the burner; and    stops the burner if a temperature being measured by the first temperature sensor arrives at the first predetermined temperature.    
   
   
       8 . The system of  claim 7 , further comprising a second temperature sensor that is disposed on the first pipe close to the first outlet, 
 wherein the controller repeatedly operates/stops the burner on the basis of the second predetermined temperature such that the temperature at the second temperature sensor is the second predetermined temperature, until the temperature at the first temperature sensor arrives at the first predetermined temperature.    
   
   
       9 . A method for regenerating a diesel particulate filter, comprising: 
 removing a diesel oxidation catalyst-diesel particulate filter assembly from an exhaust system;    fixing the assembly to a fixing part;    closing an inlet of the assembly, opening a second outlet of the assembly, and    connecting a second pipe to the second outlet;    connecting a first pipe to a first outlet of the assembly;    operating a pump, a turbine, and a burner;    determining whether a temperature being measured by a first temperature sensor reaches a first predetermined temperature; and    stopping the pump, the turbine, and the burner if the first predetermined is reached.    
   
   
       10 . The method of  claim 9 , further comprising repeatedly operating/stopping the burner on the basis of a second predetermined temperature such that the temperature at a second temperature sensor is the second predetermined temperature, until the temperature at the first temperature sensor arrives at the first predetermined temperature.