Liquid cooling system for an internal combustion engine of a vehicle

Abstract

The invention relates to a liquid cooling system (K) for an internal combustion engine ( 2 ) of a vehicle with a cylinder head ( 3 ) having as integrated exhaust manifold ( 7 ), wherein the cylinder head ( 3 ) has at least a first cooling chamber ( 5 ) for cooling areas adjoining a combustion chamber and at least a second cooling chamber ( 6 ) for cooling the exhaust manifold ( 7 ), wherein flows can pass through the first and second cooling chambers ( 5, 6 ) in parallel separately from one another. The cooling management can be improved in a simple manner if at least one oil cooler ( 14 ) and/or at least one vehicle heating element ( 15 ) is arranged in series with the second cooling chamber ( 6 ) in the cooling circuit ( 1 ).

1 . A liquid cooling system for an internal combustion engine of a vehicle with a cylinder head comprising an integrated exhaust manifold, wherein the cylinder head has at least one first cooling space for cooling areas adjacent to a combustion chamber and at least one second cooling space for cooling the exhaust manifold, said first and second cooling spaces providing separate parallel cooling flow paths, wherein at least one oil cooler and/or at least one vehicle heating element is disposed in a cooling circuit in series with the second cooling space. 
     
     
         2 . The liquid cooling system according to  claim 1 , wherein a first partial cooling circuit leading to the first cooling space and a second partial cooling circuit leading to the second cooling space branch off a common main line. 
     
     
         3 . The liquid cooling system according to  claim 2 , wherein the oil cooler in the second partial cooling circuit is located upstream of the second cooling space. 
     
     
         4 . The liquid cooling system according to  claim 2 , wherein the vehicle heating element in the second partial cooling circuit is located downstream of the second cooling space. 
     
     
         5 . The liquid cooling system according to  claim 1 , wherein a first double-acting thermostatic valve is disposed upstream of the coolant pump in the area where a main cooling circuit coming from the coolant cooler and an auxiliary cooling circuit bypassing the coolant cooler meet. 
     
     
         6 . The liquid cooling system according to  claim 5 , wherein the first cooling space is connected with the auxiliary cooling circuit by a first coolant line. 
     
     
         7 . The liquid cooling system according to  claim 5 , wherein the second cooling space is connected with the main cooling circuit and/or the auxiliary cooling circuit by a second coolant line. 
     
     
         8 . The liquid cooling system according to  claim 1 , wherein at least one third cooling space in the cylinder block is connected with the first cooling space in the cylinder head by means of at least one transfer passage. 
     
     
         9 . The liquid cooling system according to  claim 8 , wherein the third cooling space is connected with the main cooling circuit by means of a third coolant line, the connection with the main cooling circuit being located upstream of the coolant cooler. 
     
     
         10 . The liquid cooling system according to  claim 9 , wherein a single-acting thermostatic valve is disposed in the third coolant line. 
     
     
         11 . The liquid cooling system according to  claim 8 , wherein the third cooling space is connected with the auxiliary cooling circuit and/or the first coolant line by means of a fourth coolant line. 
     
     
         12 . The liquid cooling system according to  claim 11 , wherein a single-acting thermostatic valve is provided in the fourth coolant line. 
     
     
         13 . The liquid cooling system according to  claim 11 , wherein at the crossing site of the first coolant line and the fourth coolant line and the auxiliary cooling circuit a second double-acting thermostatic valve is provided. 
     
     
         14 . The liquid cooling system according to  claim 2 , wherein the first partial cooling circuit and the second partial cooling circuit branch of the common main line downstream of a coolant pump. 
     
     
         15 . The liquid cooling system according to  claim 7 , wherein the vehicle heating element is located in the second coolant line.