Methods and systems are provided for a coolant system. In one example, a method may include diagnosing a condition of a pump of the coolant system based on a temperature change of coolant. The diagnostic may determine if the pump is stuck on or off.

A control system that uses an algorithm to control the fan speed in a cooling system for an engine is disclosed. The algorithm is adapted to maintain a cooling medium at a set temperature instead of an operating temperature range of the cooling medium. The algorithm is also adapted to maintain a cooling medium at a set temperature and to build a cooling safety margin in response to an engine output torque percentage that is below an output torque percentage setpoint.

The cooling capacity of a cooling fan is made lower when a vehicle was not running while towing a trailer than when the vehicle was running while towing the trailer immediately before the end of a service of the vehicle, in activating the cooling fan after the end of the service.

An Integrated thermal management valve (ITM) control apparatus of a vehicle includes a driving information generator that generates driving information of the vehicle, a refrigerant pressure measuring device that measures a refrigerant pressure of a vehicle air conditioner of the vehicle, and an ITM controller that is configured to control the ITM of the vehicle, according to the generated driving information and the measured refrigerant pressure.

A control system that uses an algorithm to control the fan speed in a cooling system for an engine is disclosed. The algorithm is adapted to maintain a cooling medium at a set temperature instead of an operating temperature range of the cooling medium. The algorithm is also adapted to maintain a cooling medium at a set temperature and to build a cooling safety margin in response to an engine output torque percentage that is below an output torque percentage setpoint.

A system for controlling an air heat exchanger of a vehicle includes an information collector which collects environmental information including a current speed of a vehicle, a desired air mass flow rate, and an ambient temperature. A storage stores the environmental information therein. A controller calculates a driving load and a cooling load in accordance with the environmental information and calculating a control amount of an air heat exchanger, at which a cost function that is a sum of the driving load and the cooling load is minimum.

The invention relates to a cooling system for a vehicle, the cooling system comprising a cooling fan comprising a ram air turbine disposed in an aperture of a fan shroud, the fan shroud comprising: an opening, a shutter mechanism movable between a closed position in which it closes the opening, and an open position in which it opens the opening so that a ram air flow can pass through the opening, wherein the fan shroud further comprises: a velocity sensor configured to measure ram air flow velocity, a temperature sensor configured to measure ram air flow temperature, and an actuator configured to move the shutter mechanism between the closed position and the open position based on measured ram air flow velocity and measured ram air flow temperature.

A vehicle control device 40 of a vehicle 200 provided with a cooling circuit 20 using a circulating cooling liquid to cool motors 112, 114 for driving a vehicle or a PCU 118 and a refrigerant circuit 30 discharging heat of the circulating refrigerant for air-conditioning a passenger compartment to the cooling liquid of the cooling circuit 20 and driven by jointly using the outputs of the motors 112, 114 and the output of an engine 12, which control device comprising a cooling mode switching part 42 switching a cooling mode from a normal control mode to a cooling priority control mode cooling the passenger compartment with priority when a predetermined condition stands and a vehicle control part 43 making the outputs of the motors 112, 114 decrease and making the output of the engine 12 increase when the normal control mode is switched to the cooling priority control mode.

A vehicle control apparatus includes a detector that detects an external temperature of a vehicle, a vehicle speed, and a coolant temperature of an engine, an input device that receives a signal for ON or OFF operations of a heating control, and a controller configured for determining a heating load depending on the heating control when the external temperature is less than a predetermined temperature and the signal for the ON operation of the heating control is input, and controls an operation of an integrated thermal management valve, a deactivation operation of cylinders included in the engine, and an operation of an active air flap, according to at least one of the heating load and the coolant temperature.

A control system that uses an algorithm to control the fan speed in a cooling system for an engine is disclosed. The algorithm is adapted to maintain a cooling medium at a set temperature instead of an operating temperature range of the cooling medium. The algorithm is also adapted to maintain a cooling medium at a set temperature and to build a cooling safety margin in response to an engine output torque percentage that is below an output torque percentage setpoint.