A cooling system includes an electric pump, a cooling target temperature sensor, a coolant temperature sensor, and an electronic control unit. The electric pump pumps a coolant to a circulation channel connected to an inlet and an outlet of a cooling channel in which heat is exchanged with a cooling target. The cooling target temperature sensor detects a cooling target temperature. The coolant temperature sensor is arranged upstream of the inlet in the circulation channel, and detects a coolant temperature. The electronic control unit controls driving of the electric pump so that a discharge flow rate of the electric pump matches a target flow rate, and sets the target flow rate using an equation based on a reference value obtained by dividing a difference between the cooling target temperature and a target cooling temperature of the cooling target by a difference between the cooling target temperature and the coolant temperature.

A control method for a cooling system is provided. The system includes a vehicle operation state detecting portion having an ambient temperature sensor, first and second coolant temperature sensors, a coolant control valve unit that adjusts opening rates of first, second, and third coolant passages and a controller. The method includes determining whether an output signal of the ambient temperature sensor satisfies a predetermined an ambient low temperature driving condition and whether an output signal of the first coolant temperature sensor satisfies a predetermined first low temperature driving condition when the output signal of the ambient temperature sensor satisfies the predetermined the ambient low temperature driving condition. The coolant control valve unit opens the first and coolant passages and closes the second coolant passage when the output signal of the first coolant temperature sensor satisfies the predetermined first low temperature driving condition.

A cooling system includes a motor block, a radiator provided with a fan, a pump with an electrical motor to pump the coolant in a cooling circuit, a first temperature sensor at the outlet of the motor block, a second temperature sensor at the outlet of the radiator, a control unit-connected to the temperature sensors and to the electrical motor of the pump to actuate the electrical motor of the pump according to the temperature values detected by the sensor temperatures.

Methods and systems are provided for a cooling arrangement. In one example, the cooling arrangement comprises flowing coolant to only an upper portion of a cylinder head during a cold-start. The cooling arrangement comprises flowing coolant to a cylinder block, a lower portion of the cylinder-head, and the upper portion of the cylinder head outside of the cold-start.

A control method for a cooling system is provided. The method includes determining whether the output signals of a first coolant temperature sensor and a second coolant temperature sensor satisfy a predetermined coolant overheating condition. A coolant control valve unit is operated to move the cam to a maximum position when the predetermined coolant overheating condition is satisfied. Additionally, a control temperature is determined according to an output signal of the first coolant temperature sensor and the second coolant temperature sensor and an operation of the injector is limited according to the determined control temperature.

A cooling system for a vehicle, includes a first cooling circuit including a first coolant passage and a first pump. The first pump is provided in the first coolant passage to circulate coolant in the first cooling circuit so as to cool a first device to a first temperature. A second cooling circuit includes a second coolant passage and a second pump. The second pump is provided in the second coolant passage to circulate coolant in the second cooling circuit so as to cool a second device to a second temperature. The second temperature is lower than the first temperature. The coolant introduction passage connects the first cooling circuit and a connected portion of the second cooling circuit between the second device and a second radiator and upstream of the second device to supply the coolant in the first cooling circuit to the second cooling circuit.

A control method for a cooling system is provided. The system includes a vehicle operation state detecting portion having an ambient temperature sensor, first and second coolant temperature sensors, a coolant control valve unit that adjusts opening rates of first, second, and third coolant passages and a controller. The method includes determining whether an output signal of the ambient temperature sensor satisfies a predetermined an ambient low temperature driving condition and whether an output signal of the first coolant temperature sensor satisfies a predetermined first low temperature driving condition when the output signal of the ambient temperature sensor satisfies the predetermined the ambient low temperature driving condition. The coolant control valve unit opens the first and coolant passages and closes the second coolant passage when the output signal of the first coolant temperature sensor satisfies the predetermined first low temperature driving condition.

A method for controlling a vehicle device (10) configured to cool of a vehicle unit (20) includes reading in temperature information which is functionally related to an operation of the vehicle unit (20) and determining a temperature gradient. The method also includes checking whether the information read in exceeds a threshold value for the information read in, checking whether the temperature gradient determined exceeds a threshold value, and emitting a signal for the control of the vehicle device (10) as a function of check results of the checking steps, in order to bring about the cooling of the vehicle unit (20) by the vehicle device (10). In addition, a control unit (100) for carrying out the method and a vehicle (200) with a control unit (100) of that type.

Provided is an engine cooling apparatus capable of preventing deterioration in reliability of a cylinder head of an engine during cold engine operation. The engine cooling apparatus comprises an engine cooling water path, a heater core cooling path, and a radiator cooling water path, and further comprises a switching valve for switching among these cooling water paths. The switching valve is operable, when the temperature of an area around an exhaust valve is raised to a value greater than, e.g., 150 C., even in a situation where the temperature of cooling water for cooling the engine is equal to or less than, e.g., 50 C., to switch from the in-engine cooling water path to the heater core cooling water path.

A warm-up device is provided in a cooling-water circuit, through which cooling water is circulated so as to pass through an engine. The warm-up device has a heat accumulating passage, in which a heat accumulating device is provided, and an accumulating-device bypassing passage bypassing the heat accumulating device. A waste-heat collecting device is provided in the cooling-water circuit so that heat is collected from exhaust gas from the engine and such collected heat is accumulated in the heat accumulating device. The cooling water is circulated through the heat accumulating device during a start-up operation of the engine in order to heat the cooling water flowing into the engine so as to quickly warm up the engine.