| 摘要 |
PROBLEM TO BE SOLVED: To provide an internal combustion engine cooling device capable of improving the controllability over the temperature of a cylinder head and the temperature of a cylinder block and contributing to improving the fuel economy performance of the internal combustion engine.SOLUTION: The internal combustion engine cooling device comprises: a first coolant line going by way of the cylinder head and a radiator; a second coolant line going by way of the cylinder block and bypassing the radiator; a third coolant line going by way of the cylinder head and a heater core and bypassing the radiator; a fourth coolant line going by way of the cylinder head and a power transmission device and bypassing the radiator; a flow control valve whose inflow side is connected to the first to fourth coolant lines and whose outflow side is connected to an intake side of an electric water pump; and a bypass line branched off from the first coolant line between the cylinder head and the radiator, bypassing the radiator, and merging with the outflow side of the flow control valve, the flow control valve controlling a quantity of the coolant supplied to the first to fourth coolant lines. |
