Device for Thermal Control of Recirculated Gases in an Internal Combustion Engine

Abstract

The invention relates to a device for thermal control of recirculated gases in an internal combustion engine, comprising a liquid coolant circuit ( 1 ), connected to an internal combustion engine ( 2 ). The circuit ( 1 ) comprises first thermal coolant/air heat exchanger means ( 3 ), such as a radiator, arranged in a first loop ( 13 ), connected to the engine ( 2 ), second thermal coolant/recirculated exhaust gas heat exchanger means ( 4 ) arranged in a second loop ( 14 ), connected in parallel to the first loop ( 13 ), in order to permit the supply of the second thermal heat exchanger means ( 4 ) with coolant from the first thermal heat exchanger means ( 3 ), characterized in that the ends of the second loop ( 14 ) are directly connected to the body of the first thermal exchanger means ( 3 ).

1 . Device for thermal control of recirculated gases of an internal combustion engine, comprising a circuit of liquid coolant connected to an internal combustion engine, the circuit comprising first coolant/air heat exchanger means, arranged in a first loop connected to the engine, second coolant/recirculated exhaust gases heat exchanger means arranged in a second loop connected in parallel to the first loop to enable supplying the second heat exchanger means with coolant from the first heat exchanger means, wherein the ends of the second loop are directly connected to the body of the first heat exchanger means. 
   
   
       2 . Thermal control device according to  claim 1 , wherein the ends of the second loop are connected to an inlet and an outlet, respectively, of the first heat exchanger means distinct from the inlet and outlet connecting the first heat exchanger means to the engine. 
   
   
       3 . Thermal control device according to  claim 1 , wherein the ends of the second loop are connected to the first heat exchanger means so as to connect the inlet and outlet of the second heat exchanger means with an outlet and an inlet, respectively, of the first heat exchanger means. 
   
   
       4 . Thermal control device according to  claim 1 , wherein the first heat exchanger means comprise at least one heat exchanger core connected to a fluid inlet assembly and a fluid outlet assembly, and the ends of the second loop are directly connected to the fluid inlet and outlet assemblies, respectively. 
   
   
       5 . Thermal control device according to  claim 1 , wherein the second loop comprises controlled means for activating the coolant flow rate. 
   
   
       6 . Thermal control device according to  claim 2 , which comprises means for controlling the coolant flow rate allowed to circulate in the first loop. 
   
   
       7 . Thermal control device according to  claim 6 , wherein the means for controlling the flow rate comprise a valve of the proportional type. 
   
   
       8 . Thermal control device according to  claim 6 , wherein the means for controlling the flow rate comprise a pump. 
   
   
       9 . Thermal control device according to  claim 6 , wherein the second loop comprises controlled means for activating the coolant flow rate, and wherein the means for activating the flow rate in the second loop and the means for controlling the flow rate in the first loop are independent, so as to enable starting or stopping the means for activating the flow rate in the second loop whatever the flow rate of coolant allowed to circulate in the first loop. 
   
   
       10 . Thermal control device according to  claim 1 , wherein the first coolant/air heat exchanger means comprises a radiator. 
   
   
       11 . Thermal control device according to  claim 5 , wherein the means for activating the coolant flow rate is a pump. 
   
   
       12 . Thermal control device according to  claim 7 , wherein the valve of the proportional type is a thermostat.