Exhaust gas cooler for an internal combustion engine

Abstract

An exhaust cooler for a combustion motor is provided that includes a flow path for guidance of the exhaust from a combustion motor, wherein the flow path has a wall to separate the exhaust gas flow from a cooling fluid and wherein heat is exchangeable via the wall between the exhaust and the cooling fluid, wherein the wall is covered at least partially by a flexible thermoelectric film.

1 . An exhaust gas cooler for an internal combustion engine, comprising:
 a flow path configured to guide exhaust gas from an internal combustion engine;   a wall arranged in the flow path for separating the exhaust gas flow from a cooling fluid, wherein heat is exchangeable between the exhaust gas and the cooling fluid via the wall; and   a flexible thermoelectric foil arranged such that the thermoelectric foil at least partially covers the wall.   
     
     
         2 . The exhaust gas cooler according to  claim 1 , wherein the fluid is a liquid coolant of a coolant circuit. 
     
     
         3 . The exhaust gas cooler according to  claim 1 , wherein the exhaust gas cooler is in the form of a bundle heat exchanger, wherein each wall is designed as a wall of one of a plurality of exchanger tubes. 
     
     
         4 . The exhaust gas cooler according to  claim 1 , wherein the exhaust gas cooler is in the form of a plate heat exchanger, wherein each wall is designed as the surface of a plate stack of the heat exchanger. 
     
     
         5 . The exhaust gas cooler according to  claim 1 , wherein the thermoelectric foil is applied to the wall at least on the exhaust-gas side.