76 results about "Radiator (engine cooling)" patented technology

The invention relates to the technical field of tractor heat dissipation, in particular to a modular integrated tractor heat management method which comprises the steps that an engine radiator, a condenser, an engine oil radiator and a hydraulic radiator are arranged on the air outlet side of a cooling fan with the fan blade angle adjustable in a centralized mode; when the tractor operates in a working condition state, actual temperature data of an engine heat dissipation module, a transmission system heat dissipation module, a hydraulic system heat dissipation module and an air conditioning system heat dissipation module are collected; preset temperature difference data and preset fan rotating speed data corresponding to the working condition state are obtained; calculating an actual temperature difference value corresponding to the preset temperature difference value; and judging the actual temperature difference value of each item and the corresponding preset temperature difference value in real time, and controlling the wind direction and the rotating speed of the cooling fan in real time according to the judgment result. The invention further provides an electro-hydraulic control heat dissipation system applying the thermal management method. Heat dissipation and reverse blowing cleaning self-cleaning are carried out on all radiators of the tractor, the power loss is reduced, and the energy loss is reduced.

This utility model discloses an opening structure for a top cover, belonging to the field of heavy vehicle engine cooling. It includes a top cover plate with a ventilation structure. The ventilation structure includes ventilation holes on the surface of the top cover plate, and an air guide assembly is provided on the cover of the ventilation holes. The air guide assembly is open on one side. By providing a ventilation structure including ventilation holes, an air guide assembly, and a protective assembly on the top cover plate, the airflow direction can be changed by the air guide assembly, preventing hot air from directly flowing back to the radiator and improving heat dissipation efficiency.

The utility model discloses a diesel engine cooling system cleaning device, and belongs to the field of diesel engine radiator cleaning.The cleaning device comprises a base frame and a cleaning box arranged on the base frame, a water pump box used for supplying water is arranged at the upper end of the cleaning box, and a movable door plate used for fixing a radiator is arranged at one end of the cleaning box; a cleaning mechanism is arranged in the cleaning box, a plurality of pulleys are arranged at the lower end of the base frame, and the cleaning mechanism comprises two groups of positioning seats arranged on the base frame at equal intervals and driving gears rotationally mounted on the positioning seats; after a water pump in a water pump box applies pressure to supply water, the water enters a liquid guide cavity through a liquid guide pipe and a liquid receiving pipe and is dispersed to supply water to a corresponding fixing frame and a liquid spraying nozzle to wash a radiator located in the center, and in the washing process, a servo motor is started to drive a gear to rotate to drive a liquid guide circular plate to rotate; and the flushing range is wider, the flushing effect is more uniform and comprehensive, and the cleaning efficiency is better.

The invention discloses a two-way waste heat recovery cooling control system and method for a hybrid power forklift in the technical field of hybrid power forklift cooling systems, and the system comprises an engine heat dissipation loop which comprises a radiator assembly and an engine assembly which are connected end to end; the motor electric control heat dissipation loop comprises an engine assembly, a first electronic control valve, a plate heat exchanger and a first electronic water pump which are connected end to end in sequence; the engine heat exchange branch comprises a plate heat exchanger, a second electronic control valve, a motor master control assembly and a second electronic water pump which are connected end to end in sequence; and the motor electric control assembly heat exchange branch comprises a radiator assembly, a second electronic water pump, a motor master control assembly and a third electronic control valve which are connected end to end in sequence. The technical problems that in the prior art, a hybrid power forklift is poor in cold starting performance and low in waste heat recovery efficiency can be solved.

The invention discloses an engine thermal management system, engineering machinery and a thermal management system control method, and belongs to the technical field of engine heat dissipation. In the thermal management system, an engine, a water pump and a radiator are connected to a main circulation heat dissipation loop, and a temperature sensor is installed at a water outlet of the engine; the phase change heat storage loop is connected to the two ends of the radiator in parallel and connected with a first control valve and a phase change unit, and the phase change unit is connected with the radiator in parallel through the first control valve. A second control valve and a waste gas heat exchanger are connected to the waste gas waste heat recovery loop, and a cooling liquid passage of the waste gas heat exchanger is connected with the main circulation heat dissipation loop in parallel through the second control valve; the controller is configured to be used for receiving engine operation parameters and engine water temperature signals collected by the temperature sensor and controlling the rotating speed of the water pump and the opening and closing states of all the control valves according to the received data, switching of the cold start warm-up working condition, the normal heat dissipation working condition and the high-load auxiliary heat dissipation working condition is achieved, and the heat efficiency of the engine is improved.

The utility model relates to the technical field of automobile parts, in particular to an engine cooling device which comprises a cooling water pump mechanism used for an automobile engine, a radiator mechanism and a thermostat, the cooling water pump mechanism comprises a water pump body, and a cooling fan acting on the radiator mechanism is movably installed at one end of the water pump body through a linkage assembly. The water pump body is in through connection with the radiator mechanism and the thermostat through the cooling liquid pipe and the low-temperature small circulating liquid pipe respectively, the thermostat is in through connection with the radiator mechanism through the high-temperature large circulating liquid pipe, the whole device can take away heat of an engine, the temperature is kept within a proper range when the engine operates, and the service life of the engine is prolonged. The engine is sufficient in power and low in oil consumption, knocking is prevented, and the rejection rate is greatly reduced.

The invention discloses a fuel cell engine cooling system, a vehicle and a monitoring method, and relates to the technical field of vehicles. The system comprises an electric pile, a radiator, a water pump, an expansion water tank, a deionizer, a plurality of flowmeters and a plurality of pressure sensors, the galvanic pile, the radiator and the water pump are sequentially connected to form a first loop; the electric pile, the deionizer and the water pump are sequentially connected to form a second loop; a water supplementing opening of the expansion water tank is connected to the first loop, a first water return opening of the expansion water tank is connected to the second loop, and a second water return opening of the expansion water tank is connected to a pipe section connected with a cooling liquid outlet of the galvanic pile; the plurality of flow meters comprise a first flow meter at the inlet of the radiator and a second flow meter at the cooling liquid inlet of the electric pile, and the plurality of pressure sensors comprise a first pressure sensor at the outlet of the radiator and a second pressure sensor at the cooling liquid inlet of the electric pile. Through flow and pressure monitoring, the probability that the fuel cell engine fails to start or the reaction does not reach the standard at low temperature can be reduced.

The invention relates to a radiator fan cowl for a new energy battery pack and an engine cooling system of an automobile, which belongs to the technical field of automobile cooling and comprises a motor mounting hub and a fan protection inner ring of the fan cowl. A plurality of groups of hub inner ring protection plate V-shaped grooves which are beneficial to air flowing and improve the air flowing operation efficiency are formed in the hub inner ring protection plate; the twelve supporting and fixing spokes are distributed in the circumferential direction of the motor installation hub, and the included angles between any two adjacent supporting and fixing spokes are different from each other. An airflow path is optimized through the twelve supporting and fixing spokes distributed at unequal angles, airflow resistance is reduced by matching with the flow guide effect of the V-shaped groove of the hub inner ring protection plate, it is ensured that more air flows through a radiator and a motor, and the heat dissipation effect is greatly improved; airflow resonance is avoided due to the design of the spokes with different angles, noise generated by airflow turbulence is reduced by matching with angle optimization of the windward sides and the leeward sides of the spokes, and quietness of automobile driving is improved.

The utility model belongs to the technical field of thermal management of automobiles, and particularly relates to an engine cooling system and an automobile, a water cooling jacket assembly of the system comprises a cylinder cover water jacket, a cylinder body water jacket and a built-in water channel, and the built-in water channel is provided with a water channel water inlet, a water channel water outlet and a bypass connector; the cylinder cover water outlet is sequentially connected with a first pipeline, a thermolator, a radiator, a third pipeline and a first water pump; the first pipeline is provided with a fourth pipeline connected to the warm air module, and the fourth pipeline is provided with a sixth pipeline connected to the bypass connector. The engine oil cooler is connected with the cylinder body water outlet and the EGR cooler, the EGR cooler is connected to the water channel water inlet, and the water channel water outlet is connected to the first water pump. According to the engine cooling system, the built-in water channel is arranged in the water jacket assembly, the built-in water jacket can be communicated with the EGR cooler, the warm air module and the water pump, long pipelines between parts at different positions can be omitted, the structure of the engine cooling system is simpler and more compact, and the engine cooling system can meet different thermal management requirements.

The application discloses an engine cooling system and a thermostat structure, which comprises an engine cooling system body port and a thermostat body, wherein the engine cooling system body port is composed of a thermostat mounting seat, a connecting pipe, a radiator, a radiator fan, a temperature sensor, a fan assembly, a cooling liquid separator and a water pump; the fan assembly is mounted on the radiator; two groups of radiator fans are mounted on the fan assembly; a radiator pipe and the temperature sensor are mounted on the fan assembly; the thermostat body is mounted on the thermostat mounting seat of the engine cooling system body port; and the water pump is mounted on the end of the thermostat mounting seat. The engine cooling system and the thermostat structure have the advantages that the pressing seat is clamped inside the containing groove, the pressing seat and the containing groove are both provided in an S-shaped section, the pressing seat and the containing groove are sealed through a sealing gasket, and the pressing seat is locked through a fixing bolt, so that liquid paraffin is prevented from overflowing between the pressing seat and the containing groove, paraffin is prevented from overflowing, and the reliability of the thermostat body is improved.

The application discloses an engine heat dissipation system, method and engineering machinery, and solves the technical problems of difficult cooling power matching of a radiator and high temperature of a power cabin affecting ECM performance and service life of an engine when a high-power engine water radiator and an intercooling radiator share a set of cooling fans. The application relates to an engine heat dissipation system, wherein the engine is arranged in a power cabin, the engine water radiator and the air inlet intercooling radiator adopt an up-down structure arrangement, the intercooling radiator is arranged inside the power cabin, the water radiator is arranged outside the power cabin, the water radiator wind guide cover adopts an inclined angle structure design, hot air is discharged upwards, hot air backflow is avoided, and the temperature of the power cabin is effectively reduced. The two radiators adopt hydraulic motor driven heat dissipation fans for independent heat dissipation, the flow of the heat dissipation motor is adjusted to realize stepless speed regulation of the fans, and reasonable control of the water temperature of the engine system, the air inlet temperature and the cabin temperature is achieved.

The invention relates to a water pump and thermal management system integrated structure, and belongs to the technical field of engine cooling. The integrated structure comprises an engine cylinder cover, a cooling water pump arranged on the engine cylinder cover, a water pump cover body covering the cooling water pump in a sealing mode and a radiator, the water pump cover body is provided with a cooling cavity allowing the cooling water pump to be installed, and the cooling cavity is communicated with an inner flow channel of the engine cylinder cover. The water pump cover body is further provided with a leakage water storage cavity, the leakage water storage cavity is communicated with an overflow hole of the cooling water pump, and evaporation holes communicated with the leakage water storage cavity are formed in the water pump cover body. The leaked water storage cavity plays a role in temporarily storing slight leakage generated by the water pump, the probability that cooling liquid leaks to other parts of an engine is reduced, and the service life of the engine is prolonged.

The utility model belongs to the technical field of thermal management of automobiles, and particularly relates to an opposed engine cooling system and an automobile. The opposed engine cooling system comprises a water pump, a water-cooled jacket assembly, a temperature sensor, a thermolator, a radiator, a supercharger, an engine oil cooler and a warm air module; wherein the water cooling jacket assembly comprises an external water jacket, a water jacket and a cylinder cover water jacket, the water jacket and the cylinder cover water jacket are oppositely arranged, the engine oil cooler is connected to one of the first pipelines and the external water jacket through an eighth pipeline, and the supercharger is correspondingly connected to the cylinder body water jacket and the external water jacket through a ninth pipeline. According to the technical scheme, the external water jacket is arranged in the water jacket assembly of the opposed engine cooling system, the external water jacket can be communicated with the water pump, the engine oil cooler and the supercharger which are located on the different sides of the engine, long pipelines between parts at different positions can be omitted, the structure of the cooling system is simpler and more compact, and the cooling efficiency is improved. And the opposed engine cooling system can realize multiple cooling liquid circulation modes so as to meet different thermal management requirements.

This utility model provides a combined air-water-oil radiator for mining trucks, relating to the field of radiator technology. It integrates air-cooled, water-cooled, and oil-cooled modules within a single frame, effectively combining the functions of cooling the turbocharger intake, the engine cooling system's coolant, and the vehicle's required oil circuit cooling. This significantly reduces the space occupied by traditional independent radiators and simplifies the overall vehicle cooling system layout. Each cooling module uses multiple parallel cooling tubes, combined with a cooling fan fixed to the front of the frame, enabling efficient cooling of air, water, and oil, ensuring stable operation of the engine and related oil circuit components under complex and harsh conditions. An expansion tank fixed to the top of the frame allows for convenient addition of coolant to the water-cooled module. The high degree of integration of the overall structure not only reduces installation difficulty but also facilitates subsequent maintenance, solving the problems of large space occupation and complex installation and maintenance in existing mining truck cooling systems.

The invention relates to the technical field of motorcycle engines, in particular to a water-cooled motorcycle engine cooling water passage structure which comprises a cylinder body, a second box body is fixedly connected to the top end of a first box body, the second box body is communicated with a radiator through a first pipeline, and a circuit switching mechanism is arranged in the second box body. The circuit switching mechanism comprises a bimetallic strip, the bottom end of the bimetallic strip abuts against a push rod, the bottom end of the push rod penetrates through the copper plate and is fixedly connected with a movable column, a through groove is formed in the movable column, and the upper portion of the front side of the movable column is slidably connected with a connecting block. The top end of the second pipeline is fixedly connected to the bottom end of the first pipeline, the flowing path of part of cooling liquid can be actively changed through the path changing mechanism, and therefore part of cooling liquid with the high temperature is replaced with standby cooling liquid, and the situation that the overall temperature exceeds the effective action range of the radiator due to the fact that the volume of the cooling liquid is limited is prevented.

The application discloses an engine cooling system, which comprises an electronic water pump, a water cooling jacket assembly, a pipeline assembly, a temperature regulator and a radiator, wherein the electronic water pump, the water cooling jacket assembly, the temperature regulator and the radiator are connected through the pipeline assembly to form a closed circulation loop so that the cooling medium forms a circulation and realizes engine heat dissipation; the engine cooling system disclosed by the application is improved and optimized in structure and circulation mode of the cooling medium, so that only the cooling medium of the cylinder head participates in the circulation during the warming-up process, the temperature rises rapidly, emission and winter heating are facilitated, and the function of rapid warming-up after cold start is realized.

The invention relates to a cooling device, an aero-engine and an aircraft, belongs to the technical field of aerospace, and solves the problems that a water flow channel in a radiator in an engine cooling device is blocked, the surface of the radiator is covered by attachments, and the radiator cannot be cleaned in time, so that the engine is over-temperature and power is reduced. The device comprises a radiator and a fan, the radiator comprises a fin part and a fixing piece; the fin part comprises a plurality of fins capable of synchronously rotating; the fan is arranged on the air outlet surface of the radiator; when the fins rotate, airflow generated by the fan acts on the fins in the rotating state so as to remove attachments on the surfaces of the fins. Water flow channels and fin surfaces in the radiator can be cleaned in time, and the reliability of the radiator is improved.

The utility model provides an engine cooling system, which relates to the field of engine cooling, and adopts the technical scheme that the engine cooling system comprises a radiator, the upper part of the radiator is communicated with a water inlet pipe, and the water inlet pipe is communicated with a water outlet of an engine. A two-way valve assembly is detachably arranged on the water injection seat, the two-way valve assembly is communicated with an overflow tank through a balance pipe on one side of the water injection seat, and an exhaust pipe is arranged on the upper portion of the overflow tank. On the basis that the cooling system has the functions of storing and supplementing cooling liquid and exhausting, occupied space is reduced, and arrangement and installation are flexible.

The utility model relates to the field of hybrid electric vehicles, in particular to a device for an auxiliary cooling system of a range extender engine, which comprises an auxiliary water pump, a kettle and a sprayer. A cooling system of the range extender comprises a main water pump, a radiator, cooling liquid and a cooling fan. The control method comprises the steps that the temperature of cooling liquid of the range extender engine is obtained; whether the water temperature of the cooling liquid is higher than a first temperature threshold value or not is judged, when it is determined that the water temperature of the cooling liquid is higher than the first temperature threshold value, an auxiliary water pump and an atomization nozzle in the auxiliary cooling system are controlled to start working, and the temperature of the cooling liquid is reduced. According to the device for the range extender engine auxiliary cooling system, normal operation of the engine cooling system is guaranteed during in-situ parking and shutdown, the endurance time of an automobile can be greatly prolonged, losses caused by overheating of an engine of the automobile can be greatly reduced, and practicability is high.

The invention provides an engine cooling fan regulation and control method and system, and belongs to the technical field of vehicle cooling systems. The method comprises the steps that the real-time output torque of an engine and temperature data of a motor, a battery and cooling liquid of a vehicle are collected, front road slope information from a vehicle-mounted navigation system is received, and the power supply voltage state is synchronously obtained; a combined mapping relation between the environment temperature grade and the engine load state grade is established; defining a plurality of fan control strategy intervals, and establishing a thermal load prediction model based on historical operation data; when it is judged that the upslope exists on the front road and the gradient is larger than or equal to 7%, a radiator fan or an intercooler fan is controlled to be switched to run at the maximum rotating speed; and when overheating, undervoltage, locked-rotor or sensor faults are detected, a degraded operation or protection mode is automatically entered. Accurate control and efficient cooling of the thermal load of the engine under various working conditions are achieved, and the energy efficiency, reliability and safety of the system are remarkably improved.

The utility model relates to diesel engine technical field especially discloses a vehicle diesel engine cooling device for high temperature environment, and high and low temperature environment cabin inner surface is fixedly connected with test bench, and the diesel engine body is arranged on the upper end of test bench, and the one end of high and low temperature environment cabin upper end is fixedly connected with adjustable speed fan near the diesel engine body, and the heat dissipation efficiency (such as fin radiator, fan wind speed matching) of air -cooled diesel engine body under extreme high temperature is directly evaluated through test, ensures that the cooling capacity satisfies the design requirement, verifies whether the temperature of key components such as cylinder body, cylinder cover, piston is lower than material tolerance limit, prevents the deformation or cracking caused by thermal stress, simulates high temperature scene such as desert, plateau, verifies the stability of diesel engine body under continuous high load working condition, exposes design defect in advance through test, reduces high temperature failure rate after product is put on the market, reduces after-sales maintenance service.

Heat pump system for a vehicle, comprising: an internal combustion engine cooling device (10) comprising a first radiator (13) and a first water pump (15) connected to each other via a first coolant line (11), the internal combustion engine cooling device (10) being configured to circulate a coolant in an internal combustion engine (12); an electrical equipment cooling device (20) having a second radiator (22) and a second water pump (24) connected to each other via a second coolant line (21), the electrical equipment cooling device (20) being configured to circulate the coolant in the second coolant line (21); a battery module (30) arranged in a battery coolant line (31) which is selectively connected to the second coolant line (21) via a first valve (V1); an air conditioning system (50) connected to the battery coolant line (31) via a second valve (V2) and in which a first connecting line (52) is formed to cool the interior of the vehicle by selectively forming an independent closed circuit, and which has a third water pump (56) and a radiator (54) arranged in the first connecting line (52); a heating device (60) connected to the first coolant line (11) via a third valve (V3) and in which a second connecting line (62) is formed to heat the interior of the vehicle by selectively forming an independent closed circuit, and which has a fourth water pump (66) and a heater (64) arranged in the second connecting line (62); and a CE (Centralized Energy) module (40) configured to heat-exchange heat energy generated from the condensation and evaporation of a refrigerant circulating in the CE module (40) with the coolant selectively via a main heat exchanger (42) and the second coolant line (21), via an evaporator (46) and the first connecting line (52), and via a sub-condenser (43) and the second connecting line (62) so that the low-temperature coolant is supplied to the air conditioner (50) and the high-temperature coolant is supplied to the heater (60), the CE module (40) comprising: the main heat exchanger (42) arranged in the second coolant line (21) between the second radiator (22) and the battery module (30) and configured to evaporate or condense the coolant, an expansion valve (45) connected to the main heat exchanger (42) via a refrigerant line (41) the evaporator (46) connected to the expansion valve (45) via the refrigerant line (41) and arranged in the first connecting line (52) to cool the refrigerant circulating along the first connecting line (52) in the air conditioning system (50), a compressor (48) arranged in the refrigerant line (41) between the evaporator (46) and the main heat exchanger (42), the sub-condenser (43) arranged in the refrigerant line (41) between the main heat exchanger (42) and the compressor (48) and arranged in the second connecting line (62) to heat the coolant circulating along the second connecting line (62) in the heating device (60), and a secondary expansion valve (49) arranged in the refrigerant line (41) between the secondary condenser (43) and the main heat exchanger (42).

The present invention provides a water-cooling structure for a motorcycle engine, belonging to the field of engine technology. It solves the problem of poor engine oil cooling performance in existing motorcycle engines. The water-cooling structure of this motorcycle engine comprises a housing, a cylinder block, and a cylinder head. An oil cooler is mounted on the housing. The water-cooling structure includes a thermostat, which comprises a housing covering the cylinder block. A return water chamber for connecting to the water outlet of the radiator and a water inlet chamber connected to the upper water jacket are formed between the housing and the cylinder block. The return water chamber includes a columnar heat exchange portion extending upward from the bottom surface to the top surface. A heat exchange channel is provided within the heat exchange portion along its length. The upper end of the heat exchange channel is connected to the water inlet chamber, and the lower end is connected to the water inlet of the oil cooler. This motorcycle engine cooling structure has a good engine oil cooling performance.

The utility model discloses a fan cowl with an air guide structure and an engine cooling device.The fan cowl is located between an engine fan and a radiator and comprises a first mounting part connected with the radiator, a second mounting part connected with the engine fan and a protection plate arranged between the first mounting part and the second mounting part; an assembly gap is formed between the engine fan and the radiator, an air guide channel is formed in the side, facing the radiator, of the protection plate, and air in the assembly gap flows to the radiator fan along the air guide channel. The air guide channel is arranged between the air protection cover and the radiator, hot air is collected in a centralized mode through the air guide channel, the hot air flows to the engine fan, and therefore the situation that the hot air is dissipated to corners at the assembly gap and is difficult to exhaust is avoided, and the radiating efficiency of the radiator is improved; and hot air is prevented from escaping to corners of the assembly gap and being influenced by high-speed rotation of an engine fan to generate turbulent flow, so that noise and vibration caused by the turbulent flow during operation of the radiator are avoided.

This utility model discloses a gasoline engine cooling structure, including a first housing with an impeller fan mounted on it. The first housing has an internal cavity containing a radiator, and a second housing surrounds the radiator. The inner wall of the first housing and the impeller fan form a first airflow channel to cool the radiator. A second airflow channel is formed between the radiator and the second housing, and the second and first airflow channels merge to form a third airflow channel to cool the cylinder head. This utility model effectively solves the noise problem associated with external radiators. Simultaneously, the radiator is located inside the first housing, increasing the cooling airflow and improving its cooling efficiency. It also reduces cooling air waste. Furthermore, the airflow is gathered through the first, second, and third airflow channels to cool the engine cylinder head, improving the utilization efficiency of the cooling air.

Method for controlling vehicle radiator grille closures (114), the method comprising: Adjusting the opening of one or more radiator grille closures (114) located at a front end of the vehicle in response to engine cooling parameters, condensation in an intercooler (18, 302, 304) and conditions of a vehicle without propulsion (102), and adjusting the one or more radiator grille closures (114) in response to a location of condensation (312, 316) in the intercooler (18, 302, 304).

The invention discloses a hybrid electric vehicle thermal management system based on a four-way reversing valve and a three-way proportional valve in the technical field of hybrid electric vehicle thermal management, which comprises a battery temperature adjusting loop, an engine cooling loop, a first engine branch, an electric drive cooling loop and a four-way reversing valve, the electrically-driven cooling loop comprises a motor waste heat absorption pipeline and a three-way proportional valve, and a radiator pipeline and a bypass are arranged between an outlet of the motor waste heat absorption pipeline and two inlets of the three-way proportional valve. In the process of heating the battery pack, when the engine waste heat is sufficient, the engine waste heat is transferred to the battery temperature adjusting loop through the first branch of the engine; when the waste heat of the motor is sufficient, the four-way reversing valve transmits the waste heat of the motor to the battery temperature adjusting loop, the three-way proportional valve adjusts the flow of the radiator loop and the bypass according to the temperature of engine cooling liquid, the waste heat of the engine and the waste heat of the motor are fully used, and it is ensured that the battery pack can rapidly and stably reach the target temperature.

Provided is an engine cooling system capable of securing a margin up to the heat resistance limit of an engine by means of pre-cooling when deceleration is performed when it is predicted that high-load travel in which the engine needs to be cooled is performed. The engine cooling system is provided with an electric water pump for circulating a coolant between an engine and a radiator of a vehicle, and a grille damper which is provided in front of the radiator and has an adjustable opening degree. When it is predicted that the engine is traveling at a high load on the basis of a high-load traveling history including position information on the map of the vehicle when the engine of the vehicle is in a high load in the past, and current position information on the map of the vehicle, opening control of the grille damper is performed when the vehicle is decelerated, and opening control of the grille damper is performed when the vehicle is decelerated. And rotational speed increase control of the electric water pump is performed.