Cooling System for Actively Cooling an Exhaust Gas System

Abstract

A cooling system for actively cooling an exhaust gas system, comprises an exhaust pipe which conducts an exhaust gas flow of an internal combustion engine and an air-conducting element. The air-conducting element surrounds the exhaust pipe and forms an air-conducting channel. The exhaust pipe is cooled by an air flow which flows through the air-conducting channel.

1 - 9 . (canceled) 
     
     
         10 . A cooling system for actively cooling an exhaust gas system, having an exhaust pipe for discharging an exhaust gas flow from an internal combustion engine, and an air-conducting element which forms an air-conducting channel which cools the exhaust, characterized by:
 a fan which moves a flow of air into the air-conducting channel.   
     
     
         11 . The cooling system according of  claim 10 , wherein:
 the fan compresses the air flow to an elevated pressure level relative to an ambient pressure.   
     
     
         12 . The cooling system of  claim 10 , wherein:
 the fan supplies a cooling air flow for the internal combustion engine as the air flow to the air conducting channel.   
     
     
         13 . The cooling system of  claim 12 , wherein:
 the air-conducting element forms an air inlet opening which communicates with the air-conducting channel, wherein the air-conducting channel is connected via the air inlet opening to an engine compartment for the internal combustion engine in order to supply the cooling air flow.   
     
     
         14 . The cooling system of  claim 10 , wherein:
 the air-conducting element has at least two openings for the air-conducting channel, both of the openings being arranged upstream of a discharge end of the exhaust pipe.   
     
     
         15 . The cooling system of  claim 10 , wherein:
 the exhaust pipe has a Venturi nozzle arrangement, and the air-conducting element forms an annular gap downstream of the Venturi nozzle arrangement.   
     
     
         16 . The cooling system of  claim 15 , wherein:
 the air-conducting element has at least two outlet openings for the air-conducting channel, and the annular gap is arranged between the two outlet openings.   
     
     
         17 . The cooling system of  claim 16 , wherein:
 the annular gap comprises a Venturi nozzle which draws ambient air into the air-conducting channel.