Internal Combustion Engine Aftertreatment Heating Loop

Abstract

An engine with an SCR catalyst aftertreatment system includes a turbocharger exhaust duct in fluid communication with the turbocharger outlet and a heating loop segment including an inlet and an outlet. The inlet and the outlet are in fluid communication with the exhaust duct, and the inlet extracts a portion of exhaust gases from the exhaust duct. The engine further includes an exhaust pressure driven air amplifier, an electric preheater, a fuel injector, an oxidation catalyst, a urea injector, and a temperature sensor on the heating loop segment.

I claim: 
     
         1 . An engine with an SCR catalyst aftertreatment system comprising:
 a turbocharger exhaust duct in fluid communication with the turbocharger outlet;   a heating loop segment including an inlet and an outlet, wherein the inlet and the outlet are in fluid communication with the exhaust duct, wherein the inlet extracts a portion of exhaust gases from the exhaust duct;   an exhaust pressure driven air amplifier on the heating loop segment;   an electric preheater on the heating loop segment;   a fuel injector on the heating loop segment;   an oxidation catalyst on the heating loop segment;   a urea injector on the heating loop segment; and   a temperature sensor on the heating loop segment.   
     
     
         2 . The engine of  claim 1 , further comprising a compressed air amplifier on the heatling loop segment. 
     
     
         3 . An engine with an oxidation catalyst aftertreatment system comprising:
 an exhaust duct in fluid communication with the engine outlet;   a heating loop segment including an inlet and an outlet, wherein the inlet and the outlet are in fluid communication with the exhaust duct, wherein the inlet extracts a portion of exhaust gases from the exhaust duct;   a compressed air amplifier on the heating loop segment;   a fuel injector on the heating loop segment;   an oxidation catalyst on the heating loop segment; and   a temperature sensor on the heating loop segment.   
     
     
         4 . The engine of  claim 3 , further comprising a burner system on the heating loop segment. 
     
     
         5 . The engine of  claim 4 , further comprising an electric preheater on the heating loop segment. 
     
     
         6 . The engine of  claim 3 , further comprising electric preheater on the heating loop segment. 
     
     
         7 . The engine of  claim 3 , wherein the engine is a natural gas engine. 
     
     
         8 . The engine of  claim 3 , wherein the fuel injector comprises an air amplifier. 
     
     
         9 . An engine with an oxidation catalyst aftertreatment system comprising:
 an exhaust duct in fluid communication with the engine outlet;   a heating loop segment including an inlet and an outlet, wherein the inlet and the outlet are in fluid communication with the exhaust duct, wherein the inlet extracts a portion of exhaust gases from the exhaust duct;   a compressed air amplifier on the heating loop segment;   a fuel injector on the heating loop segment;   an oxidation catalyst on the heating loop segment;   a urea injector on the heating loop segment; and   a temperature sensor on the heating loop segment.   
     
     
         10 . The engine of  claim 9 , further comprising a burner system on the heating loop segment. 
     
     
         11 . The engine of  claim 10 , further comprising an electric preheater on the heating loop segment. 
     
     
         12 . The engine of  claim 9 , further comprising electric preheater on the heating loop segment. 
     
     
         13 . The engine of  claim 9 , wherein the engine is a natural gas engine. 
     
     
         14 . The engine of  claim 9 , wherein the fuel injector comprises an air amplifier.