| 摘要 |
PROBLEM TO BE SOLVED: To provide a cooling device for a vehicular internal combustion engine and a control method, capable of obtaining warm-up performance equivalent to performance at a high outside air temperature while suppressing abnormal combustion at a low outside air temperature.SOLUTION: A cooling device for a vehicular internal combustion engine includes an electric water pump for circulating coolant, a bypass line for bypassing a radiator, and a flow control valve for controlling coolant flow circulating the bypass line. When an outside air temperature is in a low outside air temperature condition, in which the temperature is less than a threshold value, the cooling device increases coolant temperature higher than a coolant temperature in a high outside air condition, in which outside air temperature is higher than the threshold value, by increasing coolant flow circulating the bypass line comparing to coolant flow at the high outside air condition, and increases coolant circulation flow by increasing a discharge flow rate of the electric water pump comparing to the rate at the high outside air condition.SELECTED DRAWING: Figure 3 |
