Patent ID: 8573163
Filing Date: 2013-11-05
Classification: F01P

Abstract:
1. A cooling apparatus for a vehicle, the cooling apparatus including a first coolant circuit in which coolant circulates through an engine and a second coolant circuit in which coolant circulates without passing through the engine, the cooling apparatus comprising: a valve that, when closed, decreases or zeroes out the flow rate of the coolant in the first coolant circuit that passes through the engine, and, when open, the valve mixes the coolant in the first coolant circuit and the coolant in the second coolant circuit; a valve control section for closing the valve when the temperature of the coolant in the first coolant circuit is less than a half-warm-up determination value set to a value lower than a determination value for warm-up completion of the engine, the valve control section opening the valve when the temperature of the coolant in the first coolant circuit increases to the half-warm-up determination value or higher; and a determining section, wherein, when the temperature of the coolant in the first coolant circuit is greater than or equal to the half-warm-up determination value, the determining section determines that a closed valve failure has occurred in the valve if the difference between the temperature of the coolant in the first coolant circuit and the temperature of the coolant in the second coolant circuit is greater than a failure determination value.