CN111365113A

CN111365113A - Engine cooling system thermal management module and engine cooling system

Info

Publication number: CN111365113A
Application number: CN202010224707.6A
Authority: CN
Inventors: 翟华磊; 刘玉琦; 杨向超; 张江
Original assignee: Chongqing Changan Automobile Co Ltd
Current assignee: Chongqing Changan Automobile Co Ltd
Priority date: 2020-03-26
Filing date: 2020-03-26
Publication date: 2020-07-03

Abstract

The invention discloses an engine cooling system heat management module and an engine cooling system, wherein the engine cooling system heat management module comprises a shell, an actuator and a ball valve, the actuator is electrically connected with an engine electronic control unit, and the engine electronic control unit can control the actuator to drive the ball valve to rotate, so that the butt joint area of a heating and ventilating valve port and a heating and ventilating pipe and the butt joint area of a radiator valve port and a radiator pipe are changed, and the flow rates of antifreeze in the heating and ventilating water path and the radiator water path are further changed; the engine cooling system comprises antifreeze, a water pump, a cylinder body water jacket, a cylinder cover water jacket, a heating ventilation device, a radiator and an engine cooling system heat management module, wherein the antifreeze flows to the cylinder body water jacket, the cylinder cover water jacket and the engine cooling system heat management module from the water pump in sequence under the action of the water pump, and then flows to the small circulation rubber pipe, the heating ventilation device and the radiator respectively and finally flows back to the water pump.

Description

Engine cooling system thermal management module and engine cooling system

Technical Field

The invention relates to the technical field of automobile engine cooling systems, in particular to an engine cooling system thermal management module and an engine cooling system.

Background

The traditional engine cooling system can only carry out rough and large-scale adjustment on the flow regulation of antifreeze and the water temperature, and under the condition, in order to ensure the absolute safety and reliability of the engine body, the performance allowance left by a power part water pump in the engine cooling system during design can be larger, so that the waste of power can be caused, and the temperature rise of the engine body can be slow. During cold start, because the temperature of an air inlet system and a cylinder is low, gasoline is difficult to atomize completely, incomplete combustion is caused, the emission of hydrocarbon is increased, and the problem of extra oil mass is caused; in addition, the engine oil temperature of the engine is low, the friction of moving components in the engine is large, and the oil consumption is also large; in such a case, it is necessary to raise the temperature of the engine body as quickly as possible to improve the combustion condition. The antifreeze liquid flow and water temperature regulating valve in the traditional engine cooling system is a wax type temperature regulator or an electronic temperature regulator, and is limited by the hysteresis of induction wax, so that the water temperature fluctuation of the system is large, the structure is relatively simple when the system is arranged, the number of controlled water ways is small, and the accurate control of the water temperature and the flow cannot be realized. Meanwhile, the water temperature fluctuation greatly reduces the service life of the engine, influences the emission, reduces the service life of a radiator and influences the driving comfort of a user. Fig. 1 is a schematic structural diagram of a conventional engine cooling system, and the working principle thereof is as follows: the antifreeze is pumped to a cylinder body water jacket 2 and a cylinder cover water jacket 3 through a water pump 1, then flows to a small circulation rubber tube 6, a heating and ventilating pipe 7 and a temperature regulator 5 respectively, and flows to a radiator 8 after being regulated by the temperature regulator 5. The liquid supplementing pot 9 is used for exhausting gas in the system and supplementing anti-freezing liquid when the anti-freezing liquid in the system is not available. The system limitations are as follows:

firstly, the traditional cooling system has a simple structure and cannot meet the diversity requirements of customers. Such as: the heating and ventilation 7 waterway is normally open, and cold water in the waterway participates in circulation in cold starting and warming-up stages, so that the engine body is slowly heated and the warming-up speed is slow in low-temperature environment in winter, the combustion condition is poor, the time for a client to wait for air conditioner to warm is long, and the like; this branch road reposition of redundant personnel antifreeze flow when high temperature in summer leads to the flow reduction of radiator 8, and the heat dissipation capacity reduces, has the risk that the temperature is high this moment, can leave sufficient water pump performance surplus for reducing the risk simultaneously when water pump 1 designs, causes the power waste again like this.

Secondly, due to the limitation of the sensitivity difference (the reaction sensitivity is 70s to 100 s) of the temperature regulator 5 and the valve structure (the flow area is larger when the valve of the temperature regulator is opened, so that the flow is increased linearly), the water temperature fluctuation is large. In a low-temperature environment in winter, the water temperature fluctuation reaches 40 ℃ under a stable working condition, so-called water temperature meter jumping phenomenon can be seen when a client uses the vehicle, the comfort degree of the vehicle is influenced, and customers complain; in the age of light weight of automobiles, the material used for the radiator 8 is increasingly thinned, the fluctuation of water temperature is large, the cold and hot impact on thin-wall parts of cooling systems such as the radiator 8 is large, and the service life of the parts is greatly reduced.

Disclosure of Invention

In view of the above, an object of the present invention is to provide a thermal management module for an engine cooling system and an engine cooling system, which can accurately and rapidly adjust the flow and temperature of an antifreeze solution, and reduce the temperature fluctuation of the antifreeze solution, so as to reduce the cold and heat impact of the temperature fluctuation on thin-wall parts such as a radiator, and in addition, by simultaneously controlling a plurality of water paths through a spherical valve core, not only can efficient thermal management be realized, but also the structure can be more compact, and the processing cost and the processing difficulty of the spherical valve core can be reduced.

The invention discloses an engine cooling system thermal management module, which comprises a shell, an actuator and a ball valve, wherein the actuator is arranged on the shell, the ball valve is arranged in the shell and is in transmission connection with an output shaft of the actuator, a shell water inlet used for being communicated with a water outlet of a water jacket of an engine cylinder cover, a warm through pipe used for being communicated with the warm through pipe and a radiator pipe used for being communicated with a radiator are arranged on the shell, the ball valve comprises a spherical valve core, and a water inlet butted with the shell water inlet, a warm through valve port butted with the warm through pipe and a radiator valve port butted with the radiator pipe are arranged on the spherical valve core; the actuator can drive the ball valve to rotate, so that the butt joint area of the heating and ventilating valve port and the heating and ventilating pipe and the butt joint area of the radiator valve port and the radiator pipe are changed, and the flow of the antifreeze in the heating and ventilating water path and the radiator water path is further changed.

Furthermore, the shell is also provided with a small circulating pipe communicated with a water inlet of the water pump.

Further, a water temperature sensor for detecting the temperature of the liquid is arranged in the water inlet of the shell, and the water temperature sensor is electrically connected with the electronic control unit of the engine.

Furthermore, the ball valve also comprises an external spline positioned at the top of the spherical valve core, the external spline is collinear with the central shaft of the spherical valve core, and an output shaft of the actuator is provided with an internal spline matched with the external spline.

Further, the casing includes casing main part and sets up end cover in the casing main part, be provided with on the end cover and be used for the restriction ball valve turned angle's end cover stopper, be provided with on the ball valve be used for with end cover stopper complex ball valve stopper.

Further, the butt joint area of the heating and ventilating valve port and the heating and ventilating pipe and the butt joint area of the radiator valve port and the radiator pipe comprise four states; the first state: when the actuator drives the ball valve to rotate from 0 degree to A degree, the heating and ventilating valve port and the radiator valve port are completely closed; and a second state: when the actuator drives the ball valve to rotate from A degrees to C degrees, the heating and ventilating valve port is gradually opened to be fully opened, and the radiator valve port is fully closed; and a third state: when the actuator drives the ball valve to rotate from C degrees to D degrees, the heating and ventilating valve port is fully opened, and the radiator valve port is gradually opened; and a fourth state: when the actuator drives the ball valve to rotate from D degrees to F degrees, the heating and ventilating valve port is gradually closed to be fully closed, and the radiator valve port is gradually and fully opened.

The invention also provides an engine cooling system, which comprises antifreeze, a water pump, a cylinder body water jacket, a cylinder cover water jacket, a heating and ventilating device, a radiator and an engine cooling system heat management module, wherein the antifreeze flows to the cylinder body water jacket, the cylinder cover water jacket and the engine cooling system heat management module from the water pump in sequence under the action of the water pump, then flows to the small circulation rubber pipe, the heating and ventilating device and the radiator respectively, and finally flows back to the water pump; the engine cooling system thermal management module is capable of controlling a flow of the antifreeze solution to the heating vent and the radiator.

Further, still include with fluid infusion kettle of radiator UNICOM.

Furthermore, the actuator is electrically connected with an electronic engine control unit, a thermal management program for controlling the actuator is arranged in the electronic engine control unit, and the electronic engine control unit can control the actuator to drive the ball valve to rotate.

The invention has the beneficial effects that: the heat management module of the engine cooling system disclosed by the invention can accurately and quickly adjust the flow and temperature of the antifreeze, and reduce the temperature fluctuation of the antifreeze, so that the cold and heat impact of the temperature fluctuation on thin-wall parts such as a radiator and the like is reduced.

Drawings

The invention is further described below with reference to the following figures and examples:

FIG. 1 is a schematic diagram of a conventional engine cooling system;

FIG. 2 is a schematic illustration of the engine cooling system of the present invention;

FIG. 3 is an exploded view of the thermal management module of the engine cooling system of the present invention;

FIG. 4 is a schematic structural diagram of a thermal management module of the engine cooling system of the present invention;

FIG. 5 is a schematic structural view of the ball valve of the present invention;

FIG. 6 is a graphical illustration of a control strategy for a thermal management module of the engine cooling system of the present invention.

Description of reference numerals: 1-water pump, 2-cylinder water jacket, 3-cylinder water jacket, 4-engine cooling system thermal management module, 41-actuator, 411-internal spline, 42-end cover, 421-end cover limiting block, 43-ball valve, 431-external spline, 432-ball valve limiting block, 433-warm-up valve port, 434-radiator valve port, 44-radiator pipe, 45-warm-up pipe, 46-small circulation pipe, 47-water temperature sensor, 5-thermostat, 6-small circulation rubber pipe, 7-warm-up, 8-radiator and 9-liquid supplement kettle.

Detailed Description

As shown in fig. 2-6, the thermal management module 4 of the engine cooling system in the embodiment includes a housing, an actuator 41, and a ball valve 43, where the actuator 41 is mounted on the housing, the ball valve 43 is mounted in the housing and is in transmission connection with an output shaft of the actuator 41, the housing is provided with a housing water inlet for communicating with a water outlet of the engine head water jacket 3, a heating and ventilating pipe 45 for communicating with the heating and ventilating pipe 7, and a radiator pipe 44 for communicating with the radiator 8, and the ball valve 43 includes a ball valve core, and the ball valve core is provided with a water inlet for interfacing with the housing water inlet, a heating and ventilating valve port 433 for interfacing with the heating and ventilating pipe 45, and a radiator valve port 434 for interfacing with the radiator pipe 44; the actuator 41 can drive the ball valve 43 to rotate, so as to change the abutting area of the heating and ventilating valve port 433 and the heating and ventilating pipe 45 and the abutting area of the radiator valve port 434 and the radiator pipe 44, and further change the antifreeze flow of the heating and ventilating 7 waterway and the radiator 8 waterway.

The joint area of the heating and ventilation valve port 433 and the heating and ventilation pipe 45 can influence the flow rate of the antifreeze flowing to the heating and ventilation 7 device, the joint area of the radiator valve port 434 and the radiator pipe 44 can influence the flow rate of the antifreeze flowing to the radiator 8, the actuator 41 can drive the ball valve 43 to rotate, the rotation speed is 40-70 degrees/s, and the full-open full-close one-time circulation can be completed within 1s, so that the quick and accurate adjustment of the flow rate of the antifreeze can be realized; the actuator 41 can adjust and control the flow of the antifreeze flowing to the heating and ventilating unit 7 and the radiator 8 by adjusting the rotation angle of the ball valve 43, and quickly and accurately adjust the temperature of the antifreeze, so that the actual temperature of the antifreeze is consistent with the target temperature of the antifreeze. The temperature difference between the actual antifreeze temperature and the target antifreeze temperature (i.e., the optimum operating temperature of the engine) is Δ T, when Δ T > 0 and Δ T > T₁At the time, the ball valve 43 is rotated rapidly,the abutting area with the radiator 8 is enlarged, the flow of the antifreeze flowing to the radiator 8 is enlarged, the heat dissipation capacity is enlarged, and the antifreeze is rapidly cooled so as to rapidly approach the target antifreeze temperature; when Δ T < 0 and Δ T is less than-T₁When the temperature of the antifreeze liquid is rapidly increased, the ball valve 43 rotates rapidly, the abutting area of the ball valve 43 and the radiator 8 is reduced, the flow rate of the antifreeze liquid flowing to the radiator 8 is reduced, and the heat dissipation capacity is reduced, so that the temperature of the antifreeze liquid is rapidly increased to rapidly approach the target antifreeze liquid temperature; when | Δ T | is less than T₁In addition, a plurality of water paths are simultaneously controlled through a spherical valve core, so that efficient heat management can be realized, the structure is more compact, and the machining cost and the machining difficulty of the spherical valve core can be reduced.

In this embodiment, the housing is further provided with a small circulation pipe 46 for communicating with the water inlet of the water pump 1. The small circulating pipe 46 is in a normally open state, the small circulating pipe 46 is connected with the small circulating rubber pipe 6, the small circulating rubber pipe 6 is connected with the water inlet of the water pump 1, and the antifreeze can directly flow into the small circulating pipe 46 after flowing into the water inlet of the shell and then directly flow back to the water inlet of the water pump 1 through the small circulating rubber pipe 6.

In this embodiment, a water temperature sensor 47 for detecting the temperature of the liquid is disposed in the water inlet of the housing, and the water temperature sensor 47 is electrically connected to the electronic control unit of the engine. The water temperature sensor 47 is capable of detecting the temperature of the antifreeze at the water inlet of the housing and sending the detected antifreeze temperature parameter, which is one of the bases of the engine electronic control unit for controlling the actuator 41, to the engine electronic control unit.

In this embodiment, the ball valve 43 further includes an external spline 431 located at the top of the ball valve core, the external spline 431 is collinear with the central axis of the ball valve core, and an internal spline 411 matched with the external spline 431 is arranged on the output shaft of the actuator 41. Through the matching of the internal spline 411 and the external spline 431, the actuator 41 can accurately drive the ball valve 43 to rotate by a corresponding angle, and the structure is compact and the transmission precision is high.

In this embodiment, the housing includes a housing main body and an end cover 42 disposed on the housing main body, an end cover limiting block 421 for limiting a rotation angle of the ball valve 43 is disposed on the end cover 42, and a ball valve limiting block 432 for matching with the end cover limiting block 421 is disposed on the ball valve 43. When the ball stopper 432 contacts the end cap stopper 421, the ball 43 stops rotating.

In this embodiment, the abutting area of the warm air valve port 433 and the warm air pipe 45 and the abutting area of the radiator valve port 434 and the radiator pipe 44 include four states; the first state: when the actuator 41 drives the ball valve 43 to rotate from 0 ° to a °, the heating and ventilating valve port 433 and the radiator valve port 434 are fully closed; and a second state: when the actuator 41 drives the ball valve 43 to rotate from a ° to C °, the heating and ventilating valve port 433 is gradually opened to full open, and the radiator valve port 434 is fully closed; and a third state: when the actuator 41 drives the ball valve 43 to rotate from C ° to D °, the heating and ventilating valve port 433 is fully opened, and the radiator valve port 434 is gradually opened; and a fourth state: when the actuator 41 drives the ball valve 43 to rotate from D ° to F °, the heating and ventilating valve port 433 is gradually closed to full-closed, and the radiator valve port 434 is gradually and fully opened. It is worth mentioning that 0 ° refers to the initial position of the

ball valve

43, and 0 ° < a ° < B ° < C ° < D ° < E ° < F °. Here, the fully opened heating and ventilation valve port 433 means that the abutting area of the heating and ventilation valve port 433 and the heating and ventilation pipe 45 is maximized, the fully closed heating and ventilation valve port 433 means that the abutting area of the heating and ventilation valve port 433 and the heating and ventilation pipe 45 is 0, the fully opened radiator valve port 434 means that the abutting area of the radiator valve port 434 and the radiator pipe 44 is maximized, and the fully opened radiator valve port 434 means that the abutting area of the radiator valve port 434 and the radiator pipe 44 is 0. The electronic control unit of the engine can judge the working condition of the automobile according to the real-time load, the temperature of the antifreeze liquid, the speed of the automobile and other parameters of the automobile, select the appropriate rotation angle state of the ball valve 43 according to the specific working condition, and then send a corresponding signal to the actuator 41 to drive the ball valve 43 to rotate by a corresponding angle, wherein the small circulating pipe 46 is not provided with a valve and is in a normally open state. As can be known by referring to table 1, fig. 2, fig. 4, and fig. 6, the operating condition corresponding to the first state is a cold start stage, the actuator 41 drives the ball valve 43 to rotate from 0 ° to a °, and the warm air valve port 433 and the radiator valve port 434 are fully closed, so that the warm air 7 water path and the radiator 8 water path are closed, the combustion heat of the engine only heats a small part of the antifreeze solution, and the rest heat is used for heating the engine body, so that the engine body is rapidly heated, and rapid start is realized; the working condition corresponding to the second state is a warming-up stage, the actuator 41 drives the ball valve 43 to rotate from A degrees to C degrees, the warming-ventilating valve port 433 is gradually opened to be fully opened, the radiator valve port 434 is fully closed, the anti-freezing solution in the water channel cannot flow to the radiator 8 for heat dissipation, rapid warming-up can be achieved, emission is improved, and warm air can be used; the working condition corresponding to the third state is a heat engine stage, at this time, the temperature of the antifreeze is high, and the engine needs to be cooled to avoid overheating, so that the actuator 41 drives the ball valve 43 to rotate from C degrees to D degrees, the heating and ventilating valve port 433 is fully opened, and the radiator valve port 434 is also gradually opened; the working condition corresponding to the state four is a summer protection mode, the summer environment temperature is high, and under severe working conditions such as a large load, the risk of high antifreeze temperature exists, at this time, the heating and ventilating valve port 433 needs to be gradually closed, and the radiator valve port 434 is gradually opened, so that the actuator 41 drives the ball valve 43 to rotate from D degrees to F degrees, the flow of the antifreeze flowing to the radiator 8 reaches the maximum value, the heat dissipation capacity also reaches the maximum value, the engine is protected, and the antifreeze temperature is prevented from being high.

Table 1:

correspond toWorking conditions

Temperature of antifreeze

Angular position of ball valve

Heating and ventilating valve port

Small circulating pipe

Radiator valve port

Control target

Cold start phase

＜X℃

＜A

All closing

Full open

All closing

Minimum flow, fast start

Warm-up phase

X℃～Y℃

A-C

Gradually open to full open

Full open

All closing

Quick warm-up, improved emission, and use of warm air

Heat engine stage

Y℃～Z℃

C-D

Full open

Gradually open

Cooling the engine to avoid overheating

Summer protection mode

＞Z℃

D-F

Gradually closing off

Full open

Gradually open to full open

The heat dissipation capacity is maximum, the engine is protected, and the high temperature of the anti-freezing solution is avoided

As shown in fig. 2, the invention further provides an engine cooling system, which includes an antifreeze, a water pump 1, a cylinder water jacket 2, a cylinder head water jacket 3, a heating and ventilating pipe 7, a radiator 8 and an engine cooling system thermal management module 4, wherein the antifreeze flows from the water pump 1 to the cylinder water jacket 2, the cylinder head water jacket 3 and the engine cooling system thermal management module 4 in sequence under the action of the water pump 1, then flows to the small circulation rubber pipe 6, the heating and ventilating pipe 7 and the radiator 8 respectively, and finally flows back to the water pump 1; the engine cooling system thermal management module 4 is capable of controlling the flow of the antifreeze to the heating and ventilation 7 and the radiator 8. In this embodiment, a fluid infusion pot 9 communicating with the radiator 8 is further included. The working principle of the engine cooling system is described in detail above, and no further description is provided herein, and compared with the conventional engine cooling system, the engine cooling system can realize efficient thermal management by simultaneously controlling a plurality of water paths through one spherical valve core.

In this embodiment, the actuator 41 is electrically connected to an electronic engine control unit, which has a built-in thermal management program for controlling the actuator 41, and can control the actuator 41 to drive the ball valve 43 to rotate. The actuator 41 is electrically connected to the electronic engine control unit, the electronic engine control unit can determine a correlation trend between the antifreeze temperature and a target antifreeze temperature (i.e., an optimal operating temperature of the engine) according to parameters such as load, the antifreeze temperature, and vehicle speed (i.e., when the actual antifreeze temperature deviates from the target antifreeze temperature, it is determined whether the actual antifreeze temperature deviates from the target antifreeze temperature), adjust and control the flow rate of the antifreeze flowing to the heating and ventilation unit 7 and the radiator 8 by adjusting the rotation angle of the ball valve 43, and quickly and accurately adjust the antifreeze temperature, so that the actual antifreeze temperature is consistent with the target antifreeze temperature, and the specific control strategy is as described above, and is not described herein again.

Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.

Claims

1. An engine cooling system thermal management module comprising a housing, an actuator (41) and a ball valve (43), the actuator (41) being mounted on the housing, the ball valve (43) being mounted within the housing and being in driving connection with an output shaft of the actuator (41), characterized in that: the shell is provided with a shell water inlet communicated with a water outlet of an engine cylinder cover water jacket (3), a heating and ventilating pipe (45) communicated with a heating and ventilating pipe (7) and a radiator pipe (44) communicated with a radiator (8), the ball valve (43) comprises a spherical valve core, and the spherical valve core is provided with a water inlet butted with the shell water inlet, a heating and ventilating valve port (433) butted with the heating and ventilating pipe (45) and a radiator valve port (434) butted with the radiator pipe (44); the actuator (41) can drive the ball valve (43) to rotate, so that the abutting area of the heating and ventilating valve port (433) and the heating and ventilating pipe (45) and the abutting area of the radiator valve port (434) and the radiator pipe (44) are changed, and the antifreeze flow of the heating and ventilating water path (7) and the radiator (8) water path is further changed.

2. The engine cooling system thermal management module of claim 1, wherein: the shell is also provided with a small circulating pipe (46) communicated with a water inlet of the water pump (1).

3. The engine cooling system thermal management module of claim 2, wherein: and a water temperature sensor (47) for detecting the temperature of the liquid is arranged in the water inlet of the shell.

4. The engine cooling system thermal management module of claim 2, wherein: the ball valve (43) further comprises an external spline (431) positioned at the top of the spherical valve core, the external spline (431) is collinear with the central shaft of the spherical valve core, and an internal spline (411) matched with the external spline (431) is arranged on the output shaft of the actuator (41).

5. The engine cooling system thermal management module of claim 2, wherein: the casing includes the casing main part and sets up end cover (42) in the casing main part, be provided with on end cover (42) and be used for the restriction the turned angle's of ball valve (43) end cover stopper (421), be provided with on ball valve (43) be used for with end cover stopper (421) complex ball valve stopper (432).

6. The engine cooling system thermal management module of claim 2, wherein: the butt joint area of the heating and ventilating valve port (433) and the heating and ventilating pipe (45) and the butt joint area of the radiator valve port (434) and the radiator pipe (44) comprise four states; the first state: when the actuator (41) drives the ball valve (43) to rotate from 0 degree to A degree, the heating and ventilating valve port (433) and the radiator valve port (434) are completely closed; and a second state: when the actuator (41) drives the ball valve (43) to rotate from A degrees to C degrees, the heating and ventilating valve port (433) is gradually opened to be fully opened, and the radiator valve port (434) is fully closed; and a third state: when the actuator (41) drives the ball valve (43) to rotate from C degrees to D degrees, the heating and ventilating valve port (433) is fully opened, and the radiator valve port (434) is gradually opened; and a fourth state: when the actuator (41) drives the ball valve (43) to rotate from D degrees to F degrees, the heating and ventilating valve port (433) is gradually closed to be fully closed, and the radiator valve port (434) is gradually fully opened.

7. An engine cooling system, characterized in that: the engine cooling system comprises a water pump (1), a cylinder water jacket (2), a cylinder cover water jacket (3), a heating pipe (7), a radiator (8) and the engine cooling system thermal management module (4) according to any one of claims 2 to 6, wherein anti-freezing liquid can flow from the water pump (1) to the cylinder water jacket (2), the cylinder cover water jacket (3) and the engine cooling system thermal management module (4) in sequence under the action of the water pump (1), then respectively flow to the small circulation rubber pipe (6), the heating pipe (7) and the radiator (8) and finally flow back to the water pump (1); the engine cooling system thermal management module (4) is capable of controlling the flow of the antifreeze solution to the heating and ventilation unit (7) and the radiator (8).

8. The engine cooling system of claim 7, wherein: the liquid replenishing kettle (9) is communicated with the radiator (8).

9. The engine cooling system of claim 7, wherein: the actuator (41) is electrically connected with an engine electronic control unit, a thermal management program for controlling the actuator (41) is arranged in the engine electronic control unit, and the engine electronic control unit can control the actuator (41) to drive the ball valve (43) to rotate.