| 摘要 |
PROBLEM TO BE SOLVED: To supply cooling water while suitably suppressing deterioration of fuel economy.SOLUTION: A cooling water control device (30) includes: first control means (32) for circulating cooling water in a first passage bypassing an internal combustion engine and for stopping circulation of the cooling water in a second passage passing through the internal combustion engine, during warming-up; second control means (32) for circulating the cooling water in the first passage while controlling the flow rate of the cooling water circulating in the first passage and for stopping the circulation of the cooling water in the second passage, during warming-up and when requiring heat quantity of a heater core is a prescribed threshold value or lower; and third control means (32) for circulating the cooling water in the first passage without reducing the flow rate of the cooling water circulating in the first passage and for circulating the cooling water in the second passage while controlling the flow rate of the cooling water circulating in the second passage, during warming-up and when the requiring heat quantity exceeds prescribed threshold value. |
