Coolant Cooler With A Gearbox-Oil Cooler Integrated Into One Of The Cooling Water Reservoirs

Abstract

The invention relates to a coolant cooler ( 7, 107 ) with a gearbox oil cooler ( 5, 105 ) which is integrated into one of the cooling water reservoirs ( 6, 106 ) of the coolant cooler ( 7, 107 ), wherein a second coolant inlet ( 13 ) and/or a second coolant angle ( 20 ) is/are provided on the coolant water reservoir ( 6, 106 ), enabling the circulation of coolant even when the motor thermostat ( 11 ) is closed.

1 . A heat exchanger, in particular coolant cooler with an additional heat exchanger, in particular transmission oil cooler, integrated into one of the collecting or water reservoirs of the heat exchanger or coolant cooler wherein a second coolant inlet and/or a second coolant outlet is/are provided on the collecting or water reservoir. 
   
   
       2 . The coolant cooler as claimed in  claim 1 , wherein the second coolant inlet and/or the second coolant outlet can be closed in a controlled manner by a thermostat. 
   
   
       3 . The coolant cooler as claimed in  claim 1 , wherein the second coolant inlet and/or the second coolant outlet is/are connected to a bypass line which branches off from an engine thermostat or leads to an engine thermostat. 
   
   
       4 . The coolant cooler as claimed in  claim 1 , wherein the second coolant inlet and/or the second coolant outlet is/are arranged in the outlet water reservoir. 
   
   
       5 . The coolant cooler as claimed in  claim 1 , wherein the second coolant inlet and/or the second coolant outlet is/are arranged above the transmission oil cooler. 
   
   
       6 . The coolant cooler as claimed in  claim 2 , wherein the thermostat has an expansion element which projects into the water reservoir. 
   
   
       7 . The coolant cooler as claimed in  claim 1 , wherein a flow divider is arranged in the water reservoir the flow divider separating a sensor region of the thermostat in a region essentially free from coolant flow from the inflow region of the second coolant inlet. 
   
   
       8 . The coolant cooler as claimed in  claim 1 , wherein the second coolant inlet and/or the second coolant outlet can be closed in a controlled manner by an, in particular, electronically controllable valve. 
   
   
       9 . The coolant cooler as claimed in  claim 8 , wherein the valve is a thermostat, in particular with an expansion element, which, in particular, has a heating system for controlling the thermostat. 
   
   
       10 . A method for controlling a coolant cooler as claimed in  claim 1 , wherein the second coolant inlet and/or the second coolant outlet is/are controlled by a thermostat as a function of the coolant temperature. 
   
   
       11 . The method as claimed in  claim 10 , wherein the second coolant inlet and/or the second coolant outlet is/are opened when the engine is not yet at its operating temperature and the transmission oil is too hot. 
   
   
       12 . The method as claimed in  claim 1 , wherein the second coolant inlet and/or the second coolant outlet is/are opened when the engine is, in particular, not yet at its operating temperature and the transmission oil is not yet at its operating temperature. 
   
   
       13 . The method as claimed in  claim 1 , wherein opening the second coolant inlet and/or the second coolant outlet is predetermined from the outside, in particular by heating a thermostat closing the opening.