Method for Exhaust-Gas Treatment for Diesel Engines or the Like, and Apparatus for Implementing This Method

Abstract

In a method for exhaust-gas treatment for diesel engines, the exhaust gas is conducted through a regenerable particulate filter as well as an NOx catalytic converter, each disposed in exhaust branch. The exhaust gas is first conducted through the NOx catalytic converter of the carbamide SCR type situated close to the engine, and subsequently through the particulate filter of the CSF type, the energy necessary for regenerating the particulate filter being supplied to it from outside. Fuel is used as regenerating agent, which is taken from fuel tank provided for the operation of the diesel engine.

1 - 6 . (canceled)  
   
   
       7 . A method for exhaust-gas treatment for a diesel engine, comprising: 
 first conducting the exhaust gas through an NOx carbamide SCR catalytic converter disposed in an exhaust branch of the diesel engine and close to the diesel engine;    subsequently conducting the exhaust gas through a CSF particulate filter disposed in the exhaust branch; and    supplying energy from an outside to the particulate filter to regenerate the particulate filter.    
   
   
       8 . The method according to  claim 7 , further comprising injecting fuel into the exhaust branch upstream of the particulate filter.  
   
   
       9 . An apparatus for exhaust-gas treatment for a diesel engine, comprising: 
 an NOx carbamide SCR catalytic converter disposed in an exhaust branch of the diesel engine and close to the diesel engine;    a CSF particulate filter disposed in the exhaust branch and downstream of the catalytic converter; and    a device configured to supply energy to the particulate filter to regenerate the particulate filter.    
   
   
       10 . The apparatus according to  claim 9 , further comprising a device configured to inject fuel into the exhaust branch upstream of the particulate filter.  
   
   
       11 . The apparatus according to  claim 10 , wherein the device configured to inject fuel is connected to a fuel tank of the diesel engine.  
   
   
       12 . The apparatus according to  claim 9 , wherein the particulate filter is disposed in an underbody area of a motor vehicle.  
   
   
       13 . The apparatus according to  claim 9 , wherein the apparatus is configured to perform the method according to  claim 7 .  
   
   
       14 . An apparatus for exhaust-gas treatment for a diesel engine, comprising: 
 NOx carbamide SCR catalytic converting means disposed in an exhaust branch of the diesel engine and close to the diesel engine;    CSF particulate filtering means disposed in the exhaust branch and downstream of the catalytic converting means; and    means for supplying energy to the particulate filtering means to regenerate the particulate filtering means.