Exhaust gas receiver, internal combustion engine and method for selective catalytic reduction

Abstract

An exhaust gas receiver that is connectable to an internal combustion engine for receiving exhaust gases from the engine, the exhaust gas receiver comprising a receiver chamber, at least one exhaust inlet, at least one exhaust outlet, and a reducing agent duct, at least a portion of the reducing agent duct being arranged inside the receiver chamber for heating the reducing agent before the reducing agent is mixed with the exhaust gases. The invention also concerns an internal combustion engine and a method for selective catalytic reduction.

1 . An exhaust gas receiver that is connectable to an internal combustion engine for receiving exhaust gases from the engine, the exhaust gas receiver comprising a receiver chamber, at least one exhaust inlet, and at least one exhaust outlet, wherein the exhaust gas receiver comprises a reducing agent duct, and at least a portion of the reducing agent duct is arranged inside the receiver chamber for heating the reducing agent before the reducing agent is mixed with the exhaust gases. 
     
     
         2 . The exhaust gas receiver according to  claim 1 , wherein the exhaust gas receiver comprises means for injecting reducing agent into the exhaust gas receiver. 
     
     
         3 . The exhaust gas receiver according to  claim 2 , wherein the means for injecting reducing agent are arranged to inject the reducing agent into the receiver chamber. 
     
     
         4 . The exhaust gas receiver according to  claim 2 , wherein the means for injecting reducing agent are arranged to inject the reducing agent into the exhaust inlet. 
     
     
         5 . The exhaust gas receiver according to  claim 3 , wherein the means for injecting reducing agent are connected to the reducing agent duct with first connecting ducts that are arranged inside the exhaust gas receiver. 
     
     
         6 . The exhaust gas receiver according to  claim 1 , wherein the exhaust gas receiver comprises a pressure medium duct supplying pressure medium for facilitating the injection of the reducing agent, and at least a portion of the pressure medium duct is arranged inside the receiver chamber for heating the pressure medium. 
     
     
         7 . The exhaust gas receiver according to  claim 6 , wherein the pressure medium duct is connected to the means for injecting reducing agent with second connecting ducts that are arranged inside the exhaust gas receiver. 
     
     
         8 . The exhaust gas receiver according to  claim 1 , wherein a mixing chamber is arranged inside the receiver chamber. 
     
     
         9 . The exhaust gas receiver according to  claim 8 , wherein the mixing chamber comprises apertures opening into the receiver chamber. 
     
     
         10 . The exhaust gas receiver according to  claim 8 , wherein the exhaust gas receiver comprises a fan or compressor for introducing exhaust gas into the mixing chamber. 
     
     
         11 . The exhaust gas receiver according to  claim 8 , wherein the exhaust gas receiver comprises means for injecting reducing agent into the mixing chamber. 
     
     
         12 . The exhaust gas receiver according to  claim 1 , wherein a catalyst element is arranged inside the receiver chamber. 
     
     
         13 . The exhaust gas receiver according to  claim 1 , wherein the exhaust outlet of the exhaust gas receiver is connectable to a turbocharger. 
     
     
         14 . The internal combustion engine, wherein the engine comprises an exhaust gas receiver according to  claim 1 , the exhaust gas receiver being connected to the engine for receiving exhaust gases from the engine. 
     
     
         15 . A method for selective catalytic reduction of exhaust gases of an internal combustion engine, in which method reducing agent is mixed with exhaust gases of the engine, and the mixture of the reducing agent and the exhaust gases is guided through a catalyst element, wherein the reducing agent is heated in a receiver chamber of an exhaust gas receiver before being mixed with the exhaust gases. 
     
     
         16 . The method according to  claim 15 , wherein the reducing agent is heated by guiding it through a reducing agent duct that is arranged at least partly inside the receiver chamber of the exhaust gas receiver. 
     
     
         17 . The method according to  claim 15 , wherein the reducing agent is injected into the exhaust inlets of the exhaust gas receiver. 
     
     
         18 . The method according to  claim 15 , wherein the reducing agent is mixed with exhaust gases in a mixing chamber that is arranged inside the receiver chamber. 
     
     
         19 . The method according to  claim 17 , wherein the injection of the reducing agent is facilitated by pressure medium, and the pressure medium is heated in the receiver chamber before being mixed with the reducing agent. 
     
     
         20 . The method according to  claim 15 , wherein the mixture of the exhaust gases and the reducing agent is guided through a catalyst element that is arranged inside the receiver chamber.