CN118088761A

CN118088761A - Air pressure driven thermal management valve assembly, engine cooling system, vehicle and control method

Info

Publication number: CN118088761A
Application number: CN202410329149.8A
Authority: CN
Inventors: 高林; 周祥军; 李智; 刘喆
Original assignee: Dongfeng Trucks Co ltd
Current assignee: Dongfeng Trucks Co ltd
Priority date: 2024-03-21
Filing date: 2024-03-21
Publication date: 2024-05-28

Abstract

The application relates to a pneumatic drive thermal management valve assembly, an engine cooling system, a vehicle and a control method, wherein the thermal management valve comprises a pipe body and a valve core arranged in the pipe body; the cylinder comprises a cylinder body and a piston rod arranged in the cylinder body, the piston rod is fixed with the valve core, and the piston rod can push the valve core to move so as to open or close the valve core; the proportional valve is provided with an air inlet, and an air pipe is communicated between the proportional valve and the air cylinder; the movable end of the potentiometer is connected with the piston rod, and a wire harness is electrically connected between the potentiometer and the proportional valve; the proportional valve monitors the moving distance of the piston rod through the potentiometer. The valve core movement condition can be accurately adjusted through the cooperation of the proportional valve, the potentiometer and the air cylinder, and the problem that the control is insensitive due to the fact that the traditional thermostat comprises a temperature sensing component and the valve core is opened and closed through expansion or contraction is solved.

Description

Air pressure driven thermal management valve assembly, engine cooling system, vehicle and control method

Technical Field

The application relates to the field of engine thermal management systems, in particular to a pneumatic drive thermal management valve assembly, an engine cooling system, a vehicle and a control method.

Background

The engine cooling system is an auxiliary system in the engine, and mainly aims to take away redundant heat in the engine through forced circulation flow of cooling liquid so as to avoid damage of key parts of the engine due to overheating.

The traditional engine cooling system is usually that an engine is sequentially communicated with a mechanical thermostat, a water tank and a water pump to form a closed waterway circulation, the mechanical thermostat automatically adjusts the water quantity entering a radiator according to the temperature of cooling water, the water circulation mode is changed, and the engine is ensured to work in a proper temperature range according to the heat radiation capacity of the engine cooling system; the cooling water circulation of the engine is divided into a large circulation and a small circulation, if the thermostat is opened, the cooling water needs to pass through the water tank and then flows back to the engine after passing through the water pump, namely the large circulation; if the thermostat is closed, the cooling water does not pass through the water tank, but directly flows back to the engine through the water pump, namely, small circulation.

In the related art, a conventional thermostat includes a temperature sensing assembly (wax pack) for opening and closing a valve core by expansion or contraction, thereby controlling a coolant flow path. The engine size cycle is realized. There are the following disadvantages: the traditional wax bag control has hysteresis and is insensitive; (2) The control interval is large, and the temperature interval between the primary opening and the full opening of the temperature regulator is large; (3) the error is large, and the valve is easy to open in advance; (4) it causes large fluctuation of the engine water temperature.

Disclosure of Invention

The application provides a pneumatic drive thermal management valve assembly, an engine cooling system, a vehicle and a control method, which can accurately adjust the movement condition of a valve core through the cooperation of a proportional valve, a potentiometer and an air cylinder, and solve the problems that the traditional thermostat in the related art contains a temperature sensing component (wax bag), and the valve core is opened and closed by expansion or contraction, so that the control is insensitive.

In a first aspect, embodiments of the present application provide a pneumatically driven thermal management valve assembly comprising:

the thermal management valve comprises a pipe body and a valve core arranged in the pipe body;

The cylinder comprises a cylinder body and a piston rod arranged in the cylinder body, the piston rod is fixed with the valve core, and the piston rod can push the valve core to move so as to open or close the valve core;

The proportional valve is provided with an air inlet, and an air pipe is communicated between the proportional valve and the air cylinder;

The movable end of the potentiometer is connected with the piston rod, and a wire harness is electrically connected between the potentiometer and the proportional valve;

The proportional valve monitors the moving distance of the piston rod through the potentiometer.

With reference to the first aspect, in an embodiment, the cylinder further includes:

the reset spring is arranged in the cylinder body and sleeved on the outer wall of the piston rod;

when the piston rod pushes the valve core to open, the elastic force of the return spring tends to push the piston rod to return.

With reference to the first aspect, in one embodiment, the tube body is provided with a mounting groove;

The pneumatic driven thermal management valve assembly further comprises:

the mounting shell is embedded and mounted in the mounting groove at one end of the mounting shell;

The cylinder body is arranged in the installation shell, and one end of the piston rod sequentially penetrates through the installation shell and the pipe body and is fixed with the valve core;

the potentiometer is mounted in the mounting housing.

With reference to the first aspect, in one embodiment, the other end of the piston rod penetrates the cylinder and is located in the mounting housing;

the movable end of the potentiometer is fixed with the other end of the piston rod.

With reference to the first aspect, in one embodiment, a multi-step groove is formed on an inner bottom wall of the mounting groove;

The mounting shell is characterized in that a multi-stage boss matched with the multi-stage groove is convexly arranged at one end of the mounting shell, and the mounting shell is assembled in the multi-stage groove through the multi-stage boss so as to be mounted in the mounting groove.

With reference to the first aspect, in one implementation manner, a step surface of the multi-step groove is provided with a guide groove;

the step surface of the multi-step boss is fixed with a guide post matched with the guide groove.

With reference to the first aspect, in one embodiment, the width of the mounting groove is larger than the width of the mounting housing in a direction perpendicular to the movement of the piston rod.

In a second aspect, embodiments of the present application provide an engine cooling system that includes a pneumatically driven thermal management valve assembly as described in some examples above.

In a third aspect, embodiments of the present application provide a vehicle including an engine cooling system as described in some embodiments.

With reference to the third aspect, in one embodiment, the vehicle further includes an air compressor in communication with the air intake.

In a fourth aspect, embodiments of the present application provide a method of controlling a pneumatic actuated thermal management valve assembly as described in some embodiments, comprising the steps of:

receiving a position signal of a current potentiometer, and adjusting air pressure in a cylinder body according to the position signal of the potentiometer to enable a piston rod in the cylinder body to move, and simultaneously enabling the piston rod to drive a valve core to move;

When the proportional valve detects that the potentiometer reaches the required position, the air pressure in the cylinder body is controlled to be unchanged, so that the piston rod stops moving.

The technical scheme provided by the embodiment of the application has the beneficial effects that:

The proportional valve receives the command signal, the proportional valve is connected with an external air source to control the air pressure in the air cylinder, the piston rod in the air cylinder is pushed to move, the piston rod moves to drive the potentiometer to move, the proportional valve detects the position signal of the potentiometer, the movement condition of the piston rod is judged, so that the movement state of the valve core is judged, after the valve core is judged to reach the required position, the piston rod is kept motionless, the valve core is kept motionless, the circulation of the engine cooling liquid is regulated, and the water temperature of the engine is kept in a proper range. Under the cooperation of the proportional valve, the potentiometer and the air cylinder, the movement condition of the valve core can be accurately regulated, and the problem that the traditional thermostat in the related art contains a temperature sensing component (wax bag), and the valve core is opened and closed by expanding or contracting cold, so that the control is insensitive is solved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic perspective view of a pneumatically actuated thermal management valve assembly;

FIG. 2 is a schematic cross-sectional elevation view of a thermal management valve, cylinder and mounting housing;

fig. 3 is a schematic perspective sectional structure of the thermal management valve, the cylinder, and the mounting case.

Fig. 4 is an enlarged schematic view of the structure of fig. 3 a.

In the figure: 1. a thermal management valve; 11. a tube body; 12. a valve core; 13. a mounting groove; 131. a multi-step groove; 132. a guide groove; 133. a through hole; 14. a valve seat; 141. a first through hole; 142. a second through hole; 15. a chamber; 2. a cylinder; 21. a cylinder; 22. a piston rod; 23. a return spring; 3. a proportional valve; 31. an air inlet; 4. an air pipe; 5. a potentiometer; 6. a wire harness; 7. a mounting shell; 71. a multi-stage boss; 72. a guide post; 8. a rubber member; 9. a seal assembly; 91. a seal ring; 92. a limiting ring; 93. circular ring grooves; 94. a bifurcated seal.

Detailed Description

In order that those skilled in the art will better understand the present application, a technical solution in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

The embodiment of the application provides a pneumatic drive thermal management valve assembly, an engine cooling system, a vehicle and a control method, which can accurately adjust the movement condition of a valve core through the cooperation of a proportional valve, a potentiometer and an air cylinder, and solve the problems that the traditional thermostat in the related art contains a temperature sensing component (wax bag), and the valve core is opened and closed by expansion or contraction, so that the control is insensitive.

As shown in fig. 1,2 and 3, an embodiment of the present application provides a pneumatic driven thermal management valve assembly, which may include: a thermal management valve 1, the thermal management valve 1 comprising a pipe body 11 and a valve core 12 installed in the pipe body 11; the cylinder 2 comprises a cylinder body 21 and a piston rod 22 arranged in the cylinder body 21, the piston rod 22 is fixed with the valve core 12, and the piston rod 22 can push the valve core 12 to move so as to enable the valve core 12 to be opened or closed; the proportional valve 3 is provided with an air inlet 31, and an air pipe 4 is communicated between the proportional valve 3 and the air cylinder 2; the movable end of the potentiometer 5 is connected with the piston rod 22, and a wire harness 6 is electrically connected between the potentiometer 5 and the proportional valve 3; the proportional valve 3 monitors the displacement distance of the piston rod 22 via the potentiometer 5. The left end of the piston rod 22 penetrates through the pipe body 11 and is fixedly connected with the valve core 12, the telescopic length of the piston rod 22 is controlled through the cylinder 2 to control the moving distance of the valve core 12, the opening and closing of the thermal management valve 1 are realized, when the thermal management valve 1 is opened, the engine cooling system is in a large cycle, and when the thermal management valve 1 is closed, the engine cooling system is in a small cycle; the potentiometer 5 is a resistor for regulating the voltage or current, and generally consists of an adjustable sliding contact (i.e. the movable end of the potentiometer 5) and a fixed resistor. By moving the sliding contact, the resistance value between the two ends of the potentiometer can be changed, so that the voltage or current in the circuit is changed, and the proportional valve 3 can know the movement condition of the piston rod 22, so that the opening or closing state of the valve core 12 can be judged.

The proportional valve 3 receives a command signal (wherein the command signal can be a valve core 12 opening command signal sent by a controller in an engine cooling system, or can be a temperature signal wire which is arranged in the thermal management valve 1, a temperature signal wire is connected between the temperature sensor and the proportional valve 3, a built-in processor of the proportional valve 3 autonomously judges whether to control the valve core 12 to move or not), the proportional valve 3 is connected with an external air source to control the air pressure in the air cylinder 2, the piston rod 22 in the air cylinder 2 is pushed to move, the piston rod 22 moves to drive the potentiometer 5 to move, the proportional valve 3 detects the position signal of the potentiometer 5 to judge the movement condition of the piston rod 22, so that the movement state of the valve core 12 is judged, and the piston rod 22 is kept motionless after the valve core 12 is judged to reach the required position, so that the valve core 12 is kept motionless, the circulation of adjusting the size of engine cooling liquid is realized, and the water temperature of the engine is kept in a proper range. Under the cooperation of the proportional valve 3, the potentiometer 5 and the cylinder 2, the movement condition of the valve core 12 can be accurately regulated, and the problem that the traditional thermostat in the related art contains a temperature sensing component (wax bag), and the valve core is opened and closed by expanding or contracting, so that the control is insensitive is solved.

Has the following advantages: 1. higher control sensitivity; compared with the traditional thermostat, the movement of the valve core 12 is controlled by the thermal expansion of the wax bag, and the pneumatic driving mode directly pushes the valve core 12 to move through pneumatic pressure, so that the movement of the valve core has higher sensitivity. 2. The temperature control is more accurate; the temperature control interval of the traditional temperature regulator is larger, the interval between the initial temperature and the full temperature is 10 ℃ at the minimum, and the characteristics of the wax bag cannot be changed after the formula is determined. The air pressure driving mode can adjust the flow of the cooling liquid at any time according to the actual working condition and the requirement, and the water temperature in the engine is adjusted by adjusting the flow of the cooling liquid into the radiator. 3. The air source is sufficient; the compressed air on the vehicle can be utilized, the air quantity is sufficient, and the piston in the air cylinder is directly driven, so that the response is quick.

Further, as shown in fig. 2, the cylinder 2 further includes: a return spring 23, wherein the return spring 23 is arranged in the cylinder 21 and sleeved on the outer wall of the piston rod 22; when the piston rod 22 pushes the valve element 12 to open, the elastic force of the return spring 23 tends to push the piston rod 22 to return. For example, when air is supplied into the cylinder 21, the air pressure pushes the piston rod 22 to move to the left side, so as to drive the valve core 12 to move to the left side, so that the thermal management valve 1 is in an open state, and the return spring 23 is in a compressed state, when the thermal management valve 1 needs to be in a closed state, the cylinder 21 is exhausted, the piston rod 22 moves to the right side, and in the moving process, the elastic force of the return spring 23 pushes the piston rod 22 to reset, so that the valve core 12 is in a tightly closed state, and the service life of the thermal management valve 1 is prolonged.

Further, as shown in fig. 2 and 3, the pipe body 11 is provided with a mounting groove 13; the pneumatic driven thermal management valve assembly further comprises: a mounting housing 7, wherein one end of the mounting housing 7 is embedded and mounted in the mounting groove 13; the cylinder 21 is mounted in the mounting housing 7, wherein, as shown in fig. 4, a through hole 133 is formed in an inner bottom wall of the mounting groove 13, and one end of the piston rod 22 sequentially penetrates through the mounting housing 7 and the through hole 133 and is fixed to the valve core 12; the potentiometer 5 is mounted in the mounting housing 7. Illustratively, the cylinder 21 and the potentiometer 5 are both mounted in the mounting housing 7, the left end of the mounting housing 7 is embedded in the mounting groove 13, and the left end of the piston rod 22 penetrates through the mounting housing 7, the tube 11 in order, and is fixed with the valve core 12. The thermal management valve 1, the air cylinder 2 and the potentiometer 5 are integrated, the occupied vehicle space is reduced, and the vehicle space utilization rate is improved.

Further, as shown in fig. 2 and 3, the other end of the piston rod 22 penetrates the cylinder 2 and is located in the mounting housing 7; the movable end of the potentiometer 5 is fixed to the other end of the piston rod 22. For example, the right end of the piston rod 22 may penetrate through the cylinder 21 and be located in the installation housing 7, and does not penetrate through the outside of the installation housing 7, and the right end of the piston rod 22 is connected and fixed with the potentiometer 5 located in the installation housing 7, where the moving end of the potentiometer 5 is sleeved on the outer wall of the right end of the piston rod 22 through an L-shaped connecting piece to perform connection and fixation. The movement of the piston rod 22 can be detected. The potentiometer 5 can be far away from the tube 11, and the influence of the temperature of the cooling liquid on the precision of the potentiometer 5 is reduced.

Further, as shown in fig. 2 and 3, the inner bottom wall of the mounting groove 13 is provided with a multi-step groove 131; one end of the installation shell 7 is convexly provided with a multi-stage boss 71 matched with the multi-stage groove 131, and the installation shell 7 is assembled in the multi-stage groove 131 through the multi-stage boss 71 so as to be installed in the installation groove 13. The multi-stage groove 131 is formed on the inner bottom wall of the left side of the mounting groove 13, and the end face of the left end of the mounting housing 7 is convexly provided with a multi-stage boss 71 adapted to the multi-stage groove 131, wherein the multi-stage groove 131 and the multi-stage boss 71 can be in a two-stage step form, that is, the inner bottom wall of the left side of the mounting groove 13 is provided with a first groove, and the inner bottom wall of the first groove is provided with a second groove to form a two-stage groove; the left side terminal surface of the multistage boss 71 of same reason is protruding to establish first boss, and the side of first boss is protruding to establish the second boss again, forms the second order boss, finally inserts in the second order recess through the embedding of second order boss, accomplishes the installation work of installation casing 7 and installation recess 13, can improve the fastness and the stability of installation casing 7 installation greatly.

Further, as shown in fig. 2 and 3, the step surface of the multi-step groove 131 is provided with a guide groove 132; the step surface of the multi-step boss 71 is fixed with a guide post 72 adapted to the guide groove 132. For example, the guide grooves 132 may be formed on the first step surface and the second step surface of the multi-step groove 131, the guide posts 72 may be fixed on the first step surface and the second step surface of the multi-step boss 71, and the guide posts 72 may be inserted into the guide grooves 132 by inserting the multi-step boss 71 into the multi-step groove 131, so as to further improve the installation firmness and stability of the installation housing 7.

Further, as shown in fig. 1,2 and 3, the width of the mounting groove 13 is larger than the width of the mounting housing 7 in a direction perpendicular to the movement of the piston rod 22. Illustratively, the mounting recess 13 has a width greater than the width of the mounting housing 7, allowing free space for the mounting recess 13 for the air tube 4 and wiring harness 6 to move into the mounting recess 13 and connect with the air cylinder 2 and potentiometer 5 within the mounting housing 7.

In some embodiments, as shown in fig. 2, 3 and 4, the inner bottom wall of the mounting groove 13 is provided with a through hole 133; the cylinder 2 is embedded in the mounting groove 13, and one end of the piston rod 22 penetrates through the through hole 133 and is connected with the valve core 12; a sealing component 9 is arranged in the mounting groove 13, and one end of the piston rod 22 sequentially penetrates through the sealing component 9 and the penetrating hole 133 and is connected with the valve core 12; the sealing assembly 9 is used for sealing a gap between the piston rod 22 and the through hole 133. Wherein, when the inner bottom wall of the mounting groove 13 is not provided with the multi-step groove 131, a sealing component 9 can be arranged in the mounting groove 13 for sealing the through hole 133, so as to prevent the leakage problem of the pipe body 11. When the inner bottom wall of the mounting groove 13 is provided with the multi-step groove 131, the sealing assembly 9 may be disposed in the multi-step groove 131 to seal the through hole 133, thereby preventing the leakage problem of the tube 11.

Further, the number of the sealing assemblies 9 is multiple, and the multiple sealing assemblies 9 are distributed at intervals along the length direction of the piston rod 22. By way of example, the number of seal assemblies 9 may be two, and by means of one more seal assembly 9, a safeguard is provided that the outermost seal assembly 9 (i.e., the leftmost seal assembly 9 in fig. 4) can now have a sealing effect when the innermost seal assembly 9 (i.e., the leftmost seal assembly 9 in fig. 4) fails.

Further, the sealing assembly 9 may include: the sealing ring 91 is arranged in the mounting groove 13 and sleeved on the outer wall of the piston rod 22; the limiting ring 92 is fixed in the mounting groove 13, and is sleeved on the outer wall of the piston rod 22. The limiting ring 92 can have a limiting effect on the mounting position of the sealing ring 91, so that the problem that the sealing failure is caused by the fact that the piston rod 22 moves back and forth to drive the sealing ring 91 to deviate is prevented.

Further, the end surface of the sealing ring 91 near the through hole 133 is coaxially provided with a circular groove 93, so that two bifurcation sealing parts 94 are formed on the end surface of the sealing ring 91 near the through hole 133, the first bifurcation sealing part 94 is attached to the outer wall of the piston rod 22, and the second bifurcation sealing part 94 is attached to the inner wall of the mounting groove 13. The left end surface of the sealing ring 91 is coaxially provided with the annular groove 93, so that the left end surface of the sealing ring 91 forms two bifurcation sealing parts 94, the bifurcation sealing parts 94 located at the inner side can squeeze and seal the outer wall of the piston rod 22, the bifurcation sealing parts 94 located at the outer side can squeeze and seal the inner side wall of the mounting groove 13, the left cavity area of the sealing ring 91 is sealed, and the cooling liquid in the pipe body 11 is prevented from entering the mounting groove 13 through the through hole 133.

Further, as shown in fig. 2 and 3, the thermal management valve 1 may further include: the valve seat 14 is installed in the pipe body 11, the valve seat 14 is provided with a first through hole 141, and one end of the piston rod 22 penetrates through the first through hole 141 and is connected with the valve core 12; a plurality of second through holes 142 are formed in one side of the valve seat 14 along the circumferential direction thereof; a chamber 15 is formed between the valve core 12, the pipe body 11 and the valve seat 14, and the chamber 15 is communicated with the second through hole 142; the oil pressure driven thermal management valve assembly further includes: the rubber piece 8 is located in the first through hole 141 and sleeved on the outer wall of the piston rod 22, and when the rubber piece 8 is located in the first through hole 141, the first through hole 141 is closed. Illustratively, when the valve core 12 is in the initial state, the right side wall of the valve core 12 contacts the valve seat 14, and a chamber 15 is formed between the valve core 12 and the pipe body 11 and between the valve seat 14, and the chamber 15 communicates with the second through hole 142; when the piston rod 22 moves leftwards, the valve core 12 is pushed to move leftwards, so that the inside of the valve core 12 is communicated with the cavity 15, and the cooling liquid flows to the right end inside the valve core 12 through the left end inside the valve core and passes through the cavity 15 and the second through hole 142, so that the large circulation work of the engine cooling liquid is realized. When the valve core 12 is in an initial state (i.e. the state not moved in fig. 2 or 3), the rubber member 8 is located in the first through hole 141 to block the first through hole 141, and when the piston rod 22 moves to the left, the rubber member 8 moves out of the first through hole 141, and the first through hole 141 can also play a large circulation role.

Further, as shown in fig. 2 and 3, the diameter of the end of the rubber member 8 located in the valve body 12 is larger than the inner diameter of the first through hole 141. By way of example, the rubber member 8 can seal the first through hole 141 well when the valve element 12 is in the closed state by the left end face of the rubber member 8 being larger than the right end face thereof.

Further, as shown in fig. 2 and fig. 3, the valve core 12 extends to the center thereof along the inner side wall thereof, and the piston rod 22 is coaxially arranged with the valve core 12 and fixedly connected with the reinforcing rib, so that the problem that the rubber member 8 is damaged by extrusion with the first through hole 141 and the piston rod 22 is blocked due to deflection of the axis of the piston rod 22 during movement can be well improved, and the reliability of the product is improved.

In some embodiments, embodiments of the present application provide an engine cooling system that includes a pneumatically driven thermal management valve assembly. The pneumatically driven thermal management valve assembly may include: a thermal management valve 1, the thermal management valve 1 comprising a pipe body 11 and a valve core 12 installed in the pipe body 11; a cylinder 2, wherein the cylinder 2 comprises a cylinder body 21 and a piston rod 22 arranged in the cylinder body 21, and the piston rod 22 is fixed with the valve core 12; the proportional valve 3 is provided with an air inlet 31, and an air pipe 4 is communicated between the proportional valve 3 and the air cylinder 2; the movable end of the potentiometer 5 is connected with the piston rod 22, and a wire harness 6 is electrically connected between the potentiometer 5 and the proportional valve 3; the proportional valve 3 monitors the displacement distance of the piston rod 22 via the potentiometer 5. The left end of the piston rod 22 penetrates through the pipe body 11 and is fixedly connected with the valve core 12, the telescopic length of the piston rod 22 is controlled through the cylinder 2 to control the moving distance of the valve core 12, the opening and closing of the thermal management valve 1 are realized, when the thermal management valve 1 is opened, the engine cooling system is in a large cycle, and when the thermal management valve 1 is closed, the engine cooling system is in a small cycle; the potentiometer 5 is a resistor for regulating the voltage or current, and generally consists of an adjustable sliding contact (i.e. the movable end of the potentiometer 5) and a fixed resistor. By moving the sliding contact, the resistance value between the two ends of the potentiometer can be changed, so that the voltage or current in the circuit is changed, and the proportional valve 3 can know the movement condition of the piston rod 22, so that the opening or closing state of the valve core 12 can be judged.

The proportional valve 3 receives the command signal, detects the current position signal of the potentiometer 5, the proportional valve 3 adjusts the air pressure in the air cylinder 2, pushes the piston rod 22 in the air cylinder 2 to move, the piston rod 22 moves to drive the potentiometer 5 to move, and the proportional valve 3 detects the position signal of the potentiometer 5 and keeps the piston rod 22 motionless after reaching the required position, so that the valve core 12 is kept motionless, the size circulation of engine cooling liquid is adjusted, and the water temperature of the engine is kept in a proper range. The movement condition of the valve core 12 can be accurately regulated through the cooperation of the proportional valve 3, the potentiometer 5 and the air cylinder 2, and the problem that the traditional thermostat in the related art contains a temperature sensing component (wax bag), and the valve core is opened and closed by expanding or contracting, so that the control is insensitive is solved.

Has the following advantages: 1. higher control sensitivity; compared with the traditional thermostat, the movement of the valve core is controlled by the thermal expansion of the wax bag, and the pneumatic driving mode directly pushes the valve core to move through pneumatic pressure, so that the valve core has higher sensitivity. 2. The temperature control is more accurate; the temperature control interval of the traditional temperature regulator is larger, the interval between the initial temperature and the full temperature is 10 ℃ at the minimum, and the characteristics of the wax bag cannot be changed after the formula is determined. The air pressure driving mode can adjust the flow of the cooling liquid at any time according to the actual working condition and the requirement, and the water temperature in the engine is adjusted by adjusting the flow of the cooling liquid into the radiator. 3. The air source is sufficient; the compressed air on the vehicle can be utilized, the air quantity is sufficient, and the piston in the air cylinder is directly driven, so that the response is quick. Meanwhile, the flow resistance of the original cooling liquid is not influenced, and the flow of the engine is not influenced.

In some embodiments, embodiments of the present application provide a vehicle that includes the engine cooling system mentioned above.

Further, the vehicle further includes: an air compressor, the output end of which communicates with the air inlet 31.

In some embodiments, embodiments of the present application provide a control method of a pneumatic driven thermal management valve assembly, including the steps of:

receiving a current position signal of the potentiometer 5, and adjusting the air pressure in the cylinder 21 according to the position signal of the potentiometer 5 to enable a piston rod 22 in the cylinder 21 to move, and simultaneously enabling the piston rod 22 to drive the valve core 12 to move;

When the proportional valve 3 detects that the potentiometer 5 reaches the required position, the air pressure in the cylinder 21 is controlled to be unchanged, so that the piston rod 22 stops moving.

In the description of the present application, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present application and simplifying the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present application. Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

It should be noted that in the present application, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The foregoing is only a specific embodiment of the application to enable those skilled in the art to understand or practice the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A pneumatically driven thermal management valve assembly, comprising:

A thermal management valve (1), wherein the thermal management valve (1) comprises a pipe body (11) and a valve core (12) arranged in the pipe body (11);

The cylinder (2) comprises a cylinder body (21) and a piston rod (22) arranged in the cylinder body (21), the piston rod (22) is fixed with the valve core (12), and the piston rod (22) can push the valve core (12) to move so as to enable the valve core (12) to be opened or closed;

The proportional valve (3), the proportional valve (3) is provided with an air inlet (31), and an air pipe (4) is communicated between the proportional valve (3) and the air cylinder (2);

The movable end of the potentiometer (5) is connected with the piston rod (22), and a wire harness (6) is electrically connected between the potentiometer (5) and the proportional valve (3);

the proportional valve (3) monitors the movement distance of the piston rod (22) through the potentiometer (5).

2. The pneumatically driven thermal management valve assembly of claim 1,

The cylinder (2) further comprises:

the return spring (23) is arranged in the cylinder body (21) and sleeved on the outer wall of the piston rod (22);

When the piston rod (22) pushes the valve core (12) to be opened, the elastic force of the return spring (23) tends to push the piston rod (22) to return.

3. The pneumatically driven thermal management valve assembly of claim 1,

The pipe body (11) is provided with a mounting groove (13);

The pneumatic driven thermal management valve assembly further comprises:

A mounting shell (7), wherein one end of the mounting shell (7) is embedded and mounted in the mounting groove (13);

The cylinder body (21) is arranged in the installation shell (7), and one end of the piston rod (22) sequentially penetrates through the installation shell (7) and the pipe body (11) and is fixed with the valve core (12);

The potentiometer (5) is arranged in the installation shell (7).

4. The pneumatically driven thermal management valve assembly of claim 3,

The other end of the piston rod (22) penetrates through the cylinder (2) and is positioned in the mounting shell (7);

The movable end of the potentiometer (5) is fixed with the other end of the piston rod (22).

5. The pneumatically driven thermal management valve assembly of claim 3,

The inner bottom wall of the mounting groove (13) is provided with a multi-step groove (131);

One end of the installation shell (7) is convexly provided with a multi-stage boss (71) matched with the multi-stage groove (131), and the installation shell (7) is assembled in the multi-stage groove (131) through the multi-stage boss (71) so as to be installed in the installation groove (13).

6. The pneumatically driven thermal management valve assembly of claim 5,

The step surface of the multi-step groove (131) is provided with a guide groove (132);

The step surface of the multi-step boss (71) is fixed with a guide post (72) matched with the guide groove (132).

7. The pneumatically driven thermal management valve assembly of claim 5,

The width of the mounting groove (13) is greater than the width of the mounting housing (7) in a direction perpendicular to the movement of the piston rod (22).

8. An engine cooling system comprising the pneumatically driven thermal management valve assembly of any one of claims 1-7.

9. A vehicle comprising the engine cooling system according to claim 8, further comprising an air compressor in communication with the air intake (31).

10. A method of controlling a pneumatically-actuated thermal management valve assembly as recited in any one of claims 1-7, comprising the steps of:

Receiving a position signal of a current potentiometer (5), and adjusting air pressure in a cylinder body (21) according to the position signal of the potentiometer (5) to enable a piston rod (22) in the cylinder body (21) to move, and simultaneously, the piston rod (22) drives a valve core (12) to move;

when the proportional valve (3) detects that the potentiometer (5) reaches a required position, the air pressure in the cylinder body (21) is controlled to be unchanged, so that the piston rod (22) stops moving.