Patent ID: 8978599
Filing Date: 2015-03-17
Classification: F01P

Abstract:
1. A cooling apparatus of an internal combustion engine for a vehicle, comprising: a coolant cooling device for cooling a coolant used for cooling the internal combustion engine; a control device for controlling a coolant passage according to a temperature state of the internal combustion engine; a first coolant passage which allows the coolant discharged from the internal combustion engine to flow in a circulated manner into the internal combustion engine via the coolant cooling device; a second coolant passage which allows the coolant discharged from the internal combustion engine to flow in a circulated manner into the internal combustion engine via a vehicle accessory; a third coolant passage which allows the coolant discharged from the internal combustion engine to flow in the circulated manner into the internal combustion engine, the third coolant passage having a cooling capacity lower than those of the first coolant passage and the second coolant passage; and at least one control valve by which coolant flow rates of the first coolant passage, the second coolant passage, and the third coolant passage are changed, wherein the control device includes: feedback control means for controlling the at least one control valve in such a manner that a temperature of the coolant is maintained at a feedback control temperature; shortcut control means for controlling the at least one control valve in such a manner, when the internal combustion engine is in a cold state, as to keep the coolant flow rate of the third coolant passage higher than the coolant flow rates of the first coolant passage and the second coolant passage until the temperature of the coolant reaches a warming-up temperature higher than the feedback control temperature; accessory warming-up control means for warming up the vehicle accessory by increasing the coolant flow rate of the second coolant passage when the temperature of the coolant reaches the warming-up temperature, and by prohibiting the cooling of the coolant until the temperature of the coolant reaches an intermediate temperature set between the warming-up temperature and the feedback control temperature; and cooling control means for cooling the coolant by increasing the coolant flow rate of the first coolant passage when the temperature of the coolant reaches the intermediate temperature, until the temperature of the coolant reaches the feedback control temperature and the controlling of the feedback control means starts, wherein the accessory warming-up control means calculates the intermediate temperature by subtracting an estimated cooling temperature estimated based on an outside-air temperature from the warming-up temperature.