Cooling system for a combustion engine, combustion engine and motor vehicle with a combustion engine

Abstract

A cooling system is provided for a combustion engine having at least one pressure sensor and a diaphragm. The diaphragm is impermeable to a coolant of the cooling system and in contact with the coolant on a first side. A sensor device of the at least one pressure sensor is arranged separated from the coolant on a second side of the diaphragm located opposite the first side and configured to determine a pressure of the coolant.

1 . A cooling system for a combustion engine, comprising:
 a coolant;   a pressure sensor;   a diaphragm that is impermeable to the coolant and on a first side in contact with the coolant; and   a sensor device of the pressure sensor on a second side of the diaphragm located opposite the first side and arranged to separate from the coolant and configured to determine a pressure of the coolant.   
     
     
         2 . The cooling system according to  claim 1 ,
 wherein the diaphragm comprises a material with a melting temperature T S,M , and   wherein T S,M >approximately 150° C.   
     
     
         3 . The cooling system according to  claim 2 , wherein the material comprises tantalum. 
     
     
         4 . The cooling system according to  claim 2 , wherein the material comprises a tantalum alloy. 
     
     
         5 . The cooling system according to  claim 2 , wherein the material comprises a hydrogenated acrylonitrile butadiene rubber. 
     
     
         6 . The cooling system according to  claim 1 , wherein the sensor device comprises a semi-conductor pressure sensor chip. 
     
     
         7 . The cooling system according to  claim 1 ,
 wherein the pressure sensor further comprises a housing with an opening,   wherein the sensor device is arranged in the opening of the housing, and   wherein the diaphragm is configured to cover the opening.   
     
     
         8 . The cooling system according to  claim 7 ,
 wherein the housing comprises a material with a melting temperate T S,G , and   wherein T S,G >approximately 150° C.   
     
     
         9 . The cooling system according to  claim 8 , wherein the material comprises a polyphenylene sulfide. 
     
     
         10 . The cooling system according to  claim 8 , wherein the material comprises a polybutylene terephtalate. 
     
     
         11 . The cooling system according to  claim 7 , wherein the diaphragm is connected to the housing with an adhesive. 
     
     
         12 . The cooling system according to  claim 1 , wherein a fluid is located between the diaphragm and the sensor device. 
     
     
         13 . The cooling system according to  claim 1 , wherein a characteristic curve of the sensor device is corrected for pressure dampening effects of the diaphragm. 
     
     
         14 . The cooling system according to  claim 1 , wherein the pressure sensor is arranged in an expansion tank. 
     
     
         15 . The cooling system according to  claim 1 , wherein the pressure sensor is arranged on an outlet side of a coolant pump. 
     
     
         16 . The cooling system according to  claim 15 ,
 wherein the coolant pump is configured to actuate by a control device, and   wherein the control device is operably connected with the pressure sensor.