Cooling control device

Abstract

A cooling control device includes a coolant pump being driven at an internal combustion engine to supply a coolant of the internal combustion engine, a heat exchanger being provided at each of plural flow paths that are formed in parallel to one another, a flow amount control valve controlling the coolant being supplied to the plural flow paths, and a control portion controlling the flow amount control valve. The control portion performs a control in a first supply mode in which the coolant is supplied to a first flow path, and a second supply mode in which the coolant is supplied to a second flow path during a supply of the coolant to the first flow path. The control portion operates a switching control shifting to the second supply mode temporarily in a state of being in the first supply mode, and returning to the first supply mode.

1 . A cooling control device comprising:
 a coolant pump being driven by a drive force of an internal combustion engine;   a heat exchanger being provided at each of a plurality of flow paths to which a coolant sent by the coolant pump is supplied in parallel to one another;   a flow amount control valve controlling a flow of the coolant relative to the plurality of flow paths; and   a control portion controlling the flow amount control valve, wherein the control portion performs a control in a first supply mode in which the coolant is supplied to a first flow path constituting one of the plurality of flow paths by a control of the flow amount control valve, and a second supply mode in which the coolant is supplied to a second flow path constituting another one of the plurality of flow paths, during a supply of the coolant to the first flow path, by the control of the flow amount control valve, and   the control portion operates a switching control shifting to the second supply mode temporarily based on a control signal in a state of being in the first supply mode, and returning to the first supply mode.   
     
     
         2 . The cooling control device according to  claim 1 , wherein the control signal is outputted based on request information requesting heat exchange of the coolant by the heat exchanger provided at the second flow path. 
     
     
         3 . The cooling control device according to  claim 1 , wherein the control portion performs the first supply mode before a warm up of a first heat exchanger of the plurality of heat exchangers is completed, the first heat exchanger being provided at the first flow path, the control portion performs the second supply mode after the warm up is completed, and in the switching control, the control portion supplies the coolant of a required flow amount to the second flow path even before the warm up is completed. 
     
     
         4 . The cooling control device according to  claim 3 , wherein the required flow amount corresponds to a fluid amount of the coolant that is accumulated from an outlet of the internal combustion engine to an outlet of a second heat exchanger of the plurality of heat exchangers at the second flow path. 
     
     
         5 . The cooling control device according to  claim 3 , wherein the first supply mode is established by the flow amount control valve that operates by a drive force of an actuator to increase an opening of a valve portion relative to the first flow path, and the second supply mode is established by the flow amount control valve by a further operation of the actuator to increase the opening of the valve portion relative to the second flow path while the opening of the valve portion relative to the first flow path is maintained in a fully-open state. 
     
     
         6 . The cooling control device according to  claim 1 , wherein one of the plurality of heat exchangers corresponds to an Exhaust Gas Recirculation cooler to which a part of combustion gas of the internal combustion engine is supplied, another one of the plurality of heat exchangers corresponds to an oil cooler to which a lubricating oil of the internal combustion engine is supplied by a lubricating oil pump, and the control portion controls the lubricating oil pump to increase a supplied amount of the lubricating oil in a case of setting the second supply mode.