Electric control circulation device for engine cooling liquid

Abstract

The utility model discloses an electric control circulation device for engine cooling liquid, which is characterized in that a valve seat comprises an inner cavity, a liquid inlet hole and a liquid return hole are arranged on a mounting surface at the rear part of the valve seat, the liquid inlet hole is communicated with the inner cavity, and the liquid inlet hole and the liquid return hole are communicated with a cooling loop of an engine body; the ball valve penetrates through a mounting hole in the front part of the inner cavity and is arranged in the inner cavity; the ball valve is arranged on the transmission shaft and can rotate in the valve seat by taking the transmission shaft as a shaft; the electric control actuator is arranged on the front portion of the inner cavity of the valve seat through an actuator end cover, the electric control actuator is connected with the part, penetrating through the actuator end cover, of the transmission shaft and can drive the ball valve to rotate through the transmission shaft, and the electric control actuator is in typical data connection with a whole vehicle ECU; the large-circulation sealing structure is arranged at a mounting hole in the upper portion of the inner cavity of the valve seat, and when the electric control circulation device is in a large-circulation state, cooling liquid entering the valve seat flows out through a large-circulation water outlet of the large-circulation sealing structure. Therefore, coupling and linkage control of water temperature and opening and closing actions can be realized.

Description

Technical Field

[0001] The utility model relates to the field of engine design and manufacturing, in particular to an electronically controlled circulation device for engine coolant. Background Art

[0002] As the commercial vehicle market becomes more saturated, the competition among brands for market segments has entered a fierce stage, especially in the heavy-duty transport market. Large trucks pay more attention to the powertrain's power, reliability, fuel economy, and maintenance costs. The former can be compared by comparing the powertrain design parameters of different brands; but reliability and fuel economy require a comprehensive evaluation of the technical development capabilities, technical maturity, and technological advancement of different manufacturers.

[0003] The existing heavy-duty truck powertrains include: traditional energy powertrains; new energy powertrains. The former include: diesel engines, natural gas engines, etc.; the latter include: hydrogen fuel engines, methanol engines, fuel cell power, etc.

[0004] The working principle of the existing engine cooling system is as follows: when the engine is idling or unloaded at low speed, the engine coolant temperature is not high, the circulation valve is closed, and the coolant flows in a closed loop inside the engine to achieve rapid warm-up; when the coolant temperature rises to the circulation valve opening temperature, the coolant partially flows into the radiator, and at this time the radiator mainly dissipates heat through the vehicle facing the wind; when the coolant temperature reaches the circulation valve full opening temperature or above, the coolant all flows into the radiator, the cooling fan continues to work to dissipate heat, and the engine's heat dissipation capacity reaches the maximum. If the water temperature continues to be higher than 108°C, the engine triggers a high temperature alarm, the engine completes torque limiting self-rescue, and reduces the speed until the alarm is lifted.

[0005] The existing circulation devices have the following risks and shortcomings:

[0006] 1. Based on the inherent characteristics of internal paraffin, the opening temperature is fixed, the response speed is slow, it cannot be decoupled from the water temperature, and the control flexibility is poor;

[0007] 2. The thermal equilibrium temperature of the engine is low, the friction resistance of the internal parts is large, the coolant transfers a lot of energy, and the engine thermal efficiency is low.

[0008] Therefore, it is urgent to develop a circulation device that can avoid the above risks and overcome the shortcomings, which has become one of the problems to be solved urgently in the field.

[0009] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to a person skilled in the art. Utility Model Content

[0010] The utility model aims to provide an electronically controlled circulation device for engine coolant, which can realize coupling and linkage control of water temperature and opening and closing action, and realize iterative increase of stable water temperature of the engine.

[0011] In order to achieve the above-mentioned purpose, the utility model provides an electronically controlled circulation device for engine coolant, including a valve seat, a ball valve, a transmission shaft, an electronically controlled actuator and a large circulation sealing structure; the valve seat includes an inner cavity, and mounting holes are arranged at the front, upper and left parts of the inner cavity, and a mounting surface is arranged at the rear of the valve seat for connecting with the engine body, and a liquid inlet hole and a liquid return hole are arranged at the mounting surface at the rear of the valve seat, the liquid inlet hole is connected with the inner cavity, and the liquid inlet hole and the liquid return hole are connected with the cooling circuit of the engine body; the ball valve is arranged through the mounting hole at the front of the inner cavity in the inner cavity; the ball valve is arranged on the transmission shaft and can rotate in the valve seat with the transmission shaft as the axis; the electronically controlled actuator is arranged at the front part of the inner cavity of the valve seat through the actuator end cover, the electronically controlled actuator is connected to the part of the transmission shaft passing through the actuator end cover, and can drive the ball valve to rotate through the transmission shaft, and the electronically controlled actuator is connected to the typical data of the vehicle ECU; the large circulation sealing structure is arranged at the mounting hole at the upper part of the inner cavity of the valve seat, when the electronically controlled circulation device is in the large circulation state, the coolant entering the valve seat flows out through the large circulation water outlet of the large circulation sealing structure.

[0012] In a preferred embodiment, the electronically controlled circulation device of the engine coolant further comprises a front sliding sleeve and a rear sliding sleeve; the front sliding sleeve is arranged at the front end of the transmission shaft, the front part of the front sliding sleeve cooperates with the positioning groove surface of the actuator end cover, and the rear part is supported by a retaining spring to limit the axial movement of the front sliding sleeve; the rear sliding sleeve is arranged at the rear end of the transmission shaft, and the rear sliding sleeve is fixedly connected to the rear part of the inner cavity of the valve seat.

[0013] In a preferred embodiment, the front sliding sleeve and the rear sliding sleeve are clearance-fitted with the transmission shaft, and the rear sliding sleeve is interference-fitted with the valve seat.

[0014] In a preferred embodiment, the large circulation sealing structure includes a coolant outlet cover, an outlet cover O-ring, a first compression sleeve, a first wave spring, a first C-groove + O-ring sealing structure and a first sealing gasket which are connected in sequence from top to bottom. As the ball valve rotates, the ball valve port will gradually turn to the large circulation water outlet and connect until the ball valve port is aligned with the large circulation water outlet, thereby realizing the large circulation state of the electrically controlled circulation device.

[0015] In a preferred embodiment, the valve seat further comprises an outer cavity, which is arranged at the left part of the valve seat and adjacent to the inner cavity. A liquid return channel is arranged in the outer cavity, and one end of the liquid return channel is connected to the liquid return hole.

[0016] In a preferred embodiment, the electrically controlled circulation device of the engine coolant also includes a small circulation sealing structure, which is arranged at the mounting hole on the left part of the inner cavity and is located in the outer cavity. The small circulation sealing structure includes a second pressure sleeve, a second wave spring, a second C-groove + O-ring sealing structure and a second sealing gasket connected in sequence from right to left. When the electrically controlled circulation device is in the small circulation state, the ball valve port of the ball valve is aligned with the small circulation water outlet of the small circulation sealing structure, and the other end of the return liquid channel is connected to the inner cavity through the small circulation water outlet.

[0017] In a preferred embodiment, the electronically controlled circulation device for engine coolant further comprises a side cover and a side cover O-ring, which are arranged at the mounting hole on the right part of the inner wall of the valve seat.

[0018] In a preferred embodiment, a motor is integrated in the electronically controlled actuator, and the motor is connected to the transmission shaft through a front sliding sleeve. The ECU controls the motor to drive the transmission shaft and the ball valve to rotate.

[0019] In a preferred embodiment, the electrically controlled circulation device of the engine coolant also includes a degassing connecting column and a water temperature sensor; the degassing connecting column is arranged on the top of the valve seat, and the degassing connecting column is connected to the inner cavity, and the gas generated in the electrically controlled circulation device can be discharged from the degassing connecting column at any time; the water temperature sensor is arranged on the top of the valve seat and is adjacent to the degassing connecting column, and the water temperature sensor is used to monitor the temperature information of the coolant in the inner cavity in real time.

[0020] In a preferred embodiment, the water temperature sensor is connected to the ECU typical data, and feeds back the temperature information of the coolant in the inner cavity to the ECU in real time.

[0021] Compared with the prior art, the electronically controlled circulation device of the engine coolant of the utility model has the following beneficial effects: it realizes coupling of water temperature and opening and closing action, and linkage control; through ECU strategy optimization, it can realize iterative increase of stable water temperature of the engine, the device is highly universal, and development cost is saved; after the overall water temperature of the engine thermal balance increases, the friction resistance of the internal moving parts of the engine decreases, and the accessory work is reduced; the coolant transfers low energy, and the thermal efficiency of the engine is improved; the ball valve is controlled to operate at high speed through the electronically controlled actuator, the command response is fast, and the total reaction time is less than 2S, which is more conducive to coping with complex operating conditions and ensuring the safety of engine operation; modular development and comprehensive matching of degassing interfaces ensure that the coolant is degassed before entering the device, avoiding air entrained in the coolant, causing irreversible corrosion to the internal parts of the engine, reducing the pumping efficiency of the water pump and other hazards, and improving the reliability of the engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of a three-dimensional exploded structure of an electric-controlled flow device according to an embodiment of the present invention;

[0023] Figure 2 is a schematic diagram of the main exploded structure of an electric control flow device according to one embodiment of the present invention;

[0024] Figure 3 is a top view of an exploded structural diagram of an electric control flow device according to an embodiment of the present invention;

[0025] Figure 4 is another three-dimensional structural schematic diagram of an electric-controlled flow device according to an embodiment of the present invention;

[0026] Figure 5 is a schematic diagram of a side exploded structure of an electric control flow device according to one embodiment of the present invention;

[0027] Figure 6 is a left-side structural schematic diagram of an electrically controlled circulation device according to one embodiment of the present invention;

[0028] Figure 7 is a schematic diagram of the rear structural view of an electrically controlled flow device according to an embodiment of the present invention;

[0029] Figure 8 is a right side structural schematic diagram of an electric control flow device according to an embodiment of the present invention;

[0030] Fig. 9 is a schematic diagram of the main structure of an electric-controlled circulation device according to one embodiment of the present invention;

[0031] Fig.10 is a schematic diagram of a top view of the structure of an electric-controlled flow device according to an embodiment of the present invention;

[0032] Fig.11 It is a bottom view structural schematic diagram of an electric control flow device according to one embodiment of the present invention.

[0033] Description of main reference numerals:

[0034] 1-degassing connecting column, 2-water temperature sensor, 3-sealing gasket, 4-electrically controlled circulation valve component, 5-coolant outlet cover, 6-outlet cover O-ring, 7-first pressing sleeve, 8-first wave spring, 9-first C-shaped groove + O-ring sealing structure, 10-first sealing gasket, 11-valve seat, 1101-inner cavity, 1102-outer cavity, 12-front sliding sleeve, 13-circlip, 14-actuator end cover O-ring, 15-actuator end cover, 16-coolant sealing ring, 17-electrically controlled actuator, 18-second sealing gasket, 19-second C-shaped groove + O-ring sealing structure, 20-second wave spring, 21-second pressing sleeve, 22-rear sliding sleeve, 23-side cover O-ring, 24-side cover, 25-ball valve, 26-transmission shaft, 27-liquid inlet hole, 28-liquid return hole. DETAILED DESCRIPTION

[0035] The specific implementation modes of the present invention are described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation modes.

[0036] Unless explicitly stated otherwise, throughout the specification and claims, the term “comprise” or variations such as “include” or “comprising”, etc., will be understood to include the stated elements or components but not to exclude other elements or components.

[0037] like Figures 1 to 11 As shown, according to a preferred embodiment of the utility model, an electronically controlled circulation device for engine coolant includes a valve seat 11, a ball valve 25, a transmission shaft 26, an electronically controlled actuator 17 and a large circulation sealing structure; the valve seat 11 includes an inner cavity 1101, and mounting holes are arranged at the front, upper and left parts of the inner cavity 1101, and a mounting surface is arranged at the rear of the valve seat 11 for connecting with the engine body, and a liquid inlet hole 27 and a liquid return hole 28 are arranged at the mounting surface at the rear of the valve seat 11, and the liquid inlet hole 27 is communicated with the inner cavity 1101, and the liquid inlet hole 27 and the liquid return hole 28 are communicated with the cooling circuit of the engine body; the ball valve 25 is arranged in the inner cavity 1101 through the mounting hole at the front of the inner cavity 1101; the ball valve 25 is arranged It is arranged on the transmission shaft 26 and can rotate in the valve seat 11 with the transmission shaft 26 as the axis; the electric control actuator 17 is arranged at the front part of the inner cavity 1101 of the valve seat 11 through the actuator end cover 15, and the actuator end cover 15 is sealed and connected with the valve seat 11 through the actuator end cover O-ring 14; the electric control actuator 17 is connected with the transmission shaft 26 that passes through the actuator end cover 15, and can drive the ball valve 25 to rotate through the transmission shaft 26, and the electric control actuator 17 is connected with the typical data of the vehicle ECU; the large circulation sealing structure is arranged at the mounting hole on the upper part of the inner cavity 1101 of the valve seat 11, and when the electric control circulation device is in the large circulation state, the coolant entering the valve seat 11 flows out through the large circulation water outlet of the large circulation sealing structure.

[0038] See also Figure 2 In some embodiments, the electronically controlled circulation device of the engine coolant further comprises a front sliding sleeve 12 and a rear sliding sleeve 22; the front sliding sleeve 12 is sleeved on the front end of the transmission shaft 26, the front part of the front sliding sleeve 12 is matched with the positioning groove surface of the actuator end cover 15, and the rear part is supported by the retaining spring 13 to limit the axial movement of the front sliding sleeve 12; the rear sliding sleeve 22 is sleeved on the rear end of the transmission shaft 26, and the rear sliding sleeve 22 is fixedly connected to the rear part of the inner cavity 1101 of the valve seat 11. The front sliding sleeve 12 and the rear sliding sleeve 22 are clearance-matched with the transmission shaft 26, and the rear sliding sleeve 22 is interference-fitted with the valve seat 11.

[0039] See also Figure 1-2In some embodiments, the large circulation sealing structure includes a coolant outlet cover 5, an outlet cover O-ring 6, a first compression sleeve 7, a first wave spring 8, a first C-groove + O-ring sealing structure 9 and a first sealing gasket 10 connected in sequence from top to bottom. As the ball valve 25 rotates, the ball valve port will gradually turn to the large circulation water outlet and connect until the ball valve port is aligned with the large circulation water outlet, thereby realizing the large circulation state of the electrically controlled circulation device.

[0040] See also Figure 3 and Figure 10-11 In some embodiments, the valve seat 11 further includes an outer cavity 1102 , which is disposed at the left portion of the valve seat 11 and adjacent to the inner cavity 1101 . A liquid return channel is disposed in the outer cavity 1102 , and one end of the liquid return channel is connected to the liquid return hole 28 .

[0041] In some embodiments, the electrically controlled circulation device of the engine coolant also includes a small circulation sealing structure, which is arranged at the mounting hole on the left part of the inner cavity 1101 and is located in the outer cavity 1102. The small circulation sealing structure includes a second pressure sleeve 21, a second wave spring 20, a second C-groove + O-ring sealing structure 19 and a second sealing gasket 18 connected from right to left in sequence. When the electrically controlled circulation device is in the small circulation state, the ball valve port of the ball valve 25 is aligned with the small circulation water outlet of the small circulation sealing structure, and the other end of the return liquid channel is connected to the inner cavity 1101 through the small circulation water outlet.

[0042] In some embodiments, the electronically controlled circulation device of the engine coolant also includes a side cover 24 and a side cover O-ring 23. The side cover 24 and the side cover O-ring 23 are arranged at the mounting hole on the right part of the inner wall of the valve seat 11. The side cover 24 and the side cover O-ring 23 are mainly used to block the mounting hole on the right side of the valve seat 11. The mounting hole on the right side of the valve seat 11 is used to check the disassembly and assembly and maintenance of the ball valve 25 and the small circulation sealing structure.

[0043] In some embodiments, a motor (not shown) is integrated in the electric control actuator 17 , and the motor is connected to the transmission shaft 26 through the front sliding sleeve 12 . The ECU controls the motor to drive the transmission shaft 26 and the ball valve 25 to rotate.

[0044] See also Figure 4In some embodiments, the electronically controlled circulation device of the engine coolant further comprises a degassing connection column 1 and a water temperature sensor 2; the degassing connection column 1 is arranged on the top of the valve seat 11, the degassing connection column 1 is connected to the inner cavity 1101, and the gas generated in the electronically controlled circulation device can be discharged from the degassing connection column 1 at any time; the water temperature sensor 2 is arranged on the top of the valve seat 11 and adjacent to the degassing connection column 1, the water temperature sensor 2 is used to monitor the temperature information of the coolant in the inner cavity 1101 in real time, and the water temperature sensor 2 is sealed and connected to the valve seat 11 through a sealing gasket 3. The water temperature sensor 2 is connected to the ECU typical data, and feeds back the temperature information of the coolant in the inner cavity 1101 to the ECU in real time.

[0045] In some embodiments, the electrically controlled circulation device mainly includes a degassing connection column 1, a water temperature sensor 2, a sealing gasket 3 and an electrically controlled circulation valve component 4, and the electrically controlled circulation valve component 4 mainly includes the following parts: Part 1 includes a coolant outlet cover 5 and an outlet cover O-ring 6, which constitute the engine large circulation water outlet port, and the port is designed with a large circulation sealing structure, which includes a first compression sleeve 7, a first wave spring 8, a first C-shaped groove + O-ring sealing structure 9 and a first sealing gasket 10. Part 2 includes a valve seat 11 to form a coolant circulation cavity, and the ball valve 25 is connected to the transmission shaft 26 by pouring through, and the rear end of the transmission shaft 26 is connected to the rear sliding sleeve 22, and the two are clearance-matched to ensure that the transmission shaft 26 can rotate freely (to avoid high and low temperature causing thermal expansion and contraction of parts, and the transmission shaft 26 is stuck), and the rear sliding sleeve 22 and the valve seat 11 are interference fit. Part three includes an electronically controlled actuator 17 as the control brain of the circulation valve. By receiving the signal transmitted by the ECU, it completes the program operation identification internally, issues instructions to drive the internal motor to rotate, and drives the ball valve 25 to rotate through the transmission shaft 26; wherein, the electronically controlled actuator 17 is fixed to the actuator end cover 15, and the latter is fixed to the valve seat 11; the transmission shaft 26 passes through the actuator end cover 15, and the two are rotated through the front sliding sleeve 12, and the front sliding sleeve 12 and the transmission shaft 26 are clearance-matched; the front end face of the front sliding sleeve 12 is matched with the positioning groove surface of the actuator end cover 15, and the rear end face is supported by the retaining spring 13 to avoid axial movement; the actuator end cover 15 and the valve seat 11, through the O-ring of the actuator end cover 15, complete radial sealing to avoid water leakage; the transmission shaft 26 is sealed through the coolant sealing ring to avoid cooling leakage. Part 4 includes a small cycle sealing structure, which includes a second sealing gasket 18, a second C-shaped groove + O-ring sealing structure 19, a second wave spring 20, and a second pressing sleeve 21; the sealing structure is pressed against the ball valve 25 on one side and assembled on the valve seat 11 on the other side, so as to ensure the sealing of the ball valve 25 during the rotation process and avoid internal leakage. Part 5 includes a side cover 24 and a side cover O-ring 23, which are mainly based on the small cycle sealing processing path of the valve seat 11 and are used to block the opening of the valve seat 11 after processing.

[0046] In some embodiments, the working principle and process of the electronically controlled circulation device of the engine coolant of the utility model are roughly as follows: during the continuous operation of the engine, the water temperature continues to change, the water temperature sensor 2 constantly updates the water temperature information, senses the temperature through the temperature measuring component and converts it into a resistance signal, which is transmitted to the ECU through the information feedback device. The ECU continuously sends CAN communication information based on the feedback information, and the electronically controlled actuator 17 receives the signal and converts it into a rotation target angle, and drives the ball valve 25 to rotate through the motor to complete the action; through the rotation of the ball valve 25, the small circulation water outlet is a process of gradually closing, and the large circulation outlet is a process of gradually closing. The water outlet is a gradual opening process. The ECU can also control the opening or closing ratio of the small-circulation water outlet and the large-circulation water outlet in real time according to actual needs, and try to adjust the ratio of the large-circulation and small-circulation water volumes. At the same time, the angle after rotation is fed back to the electronic actuator 17 to determine whether the ball valve 25 is rotated in place to ensure closed-loop control of the action. The target stable water temperature of the engine can be changed through ECU program settings to ensure the universal and iterative design and development of the product. This design has a degassing interface to ensure that there is no risk of bubbles inside the engine when the water temperature is high. The comprehensive design ensures fast response and ensures safety.

[0047] In summary, the electronically controlled circulation device of the engine coolant of the utility model has the following advantages: it realizes coupling of water temperature and opening and closing action, and linkage control; through ECU strategy optimization, it can realize iterative increase of stable water temperature of the engine, the device is highly universal, and development cost is saved; after the overall water temperature of the engine thermal balance increases, the friction resistance of the internal moving parts of the engine decreases, and the accessory work is reduced; the coolant transfers low energy, and the thermal efficiency of the engine is improved; the ball valve is controlled to operate at high speed through the electronically controlled actuator, the command response is fast, and the total reaction time is less than 2S, which is more conducive to coping with complex operating conditions and ensuring the safety of engine operation; modular development, comprehensive matching degassing interface, to ensure that the coolant is degassed before entering the device, to avoid air mixed in the coolant, causing irreversible corrosion to the internal parts of the engine, reducing the pumping efficiency of the water pump and other hazards, and improving the reliability of the engine.

[0048] The foregoing description of specific exemplary embodiments of the utility model is for the purpose of illustration and illustration. These descriptions are not intended to limit the utility model to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the utility model and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the utility model and various different options and changes. The scope of the utility model is intended to be defined by the claims and their equivalents.

Claims

1. An electronically controlled circulation device for engine coolant, characterized in that: include: A valve seat, comprising an inner cavity, with mounting holes arranged at the front, upper and left parts of the inner cavity, a mounting surface arranged at the rear of the valve seat for connection with an engine body, a liquid inlet hole and a liquid return hole arranged at the mounting surface at the rear of the valve seat, the liquid inlet hole being in communication with the inner cavity, and the liquid inlet hole and the liquid return hole being in communication with a cooling circuit of the engine body; a ball valve, which is disposed in the inner cavity through a mounting hole at the front portion of the inner cavity; A transmission shaft, the ball valve is arranged on the transmission shaft and can rotate in the valve seat with the transmission shaft as the axis; An electronically controlled actuator, which is disposed at the front of the inner cavity of the valve seat through an actuator end cover, is connected to the portion of the transmission shaft that passes through the actuator end cover, and can drive the ball valve to rotate through the transmission shaft, and is connected to the typical data of the vehicle ECU; and A large circulation sealing structure is arranged at the mounting hole on the upper part of the inner cavity of the valve seat. When the electric control circulation device is in a large circulation state, the coolant entering the valve seat flows out through the large circulation water outlet of the large circulation sealing structure.

2. The electronically controlled flow device for engine coolant according to claim 1, characterized in that: Also includes: A front sliding sleeve, which is sleeved on the front end of the transmission shaft, the front portion of the front sliding sleeve is matched with the positioning groove surface of the actuator end cover, and the rear portion is supported by a retaining spring to limit the axial movement of the front sliding sleeve; and The rear sliding sleeve is sleeved on the rear end of the transmission shaft, and the rear sliding sleeve is fixedly connected to the rear part of the inner cavity of the valve seat.

3. The electronically controlled circulation device for engine coolant according to claim 2, characterized in that: The front sliding sleeve and the rear sliding sleeve are clearance-fitted with the transmission shaft, and the rear sliding sleeve is interference-fitted with the valve seat.

4. The electronically controlled flow device for engine coolant according to claim 1, characterized in that: The large circulation sealing structure includes a coolant outlet cover, an outlet cover O-ring, a first compression sleeve, a first wave spring, a first C-groove + O-ring sealing structure and a first sealing gasket which are connected in sequence from top to bottom. As the ball valve rotates, the ball valve port will gradually turn to the large circulation water outlet and connect until the ball valve port is aligned with the large circulation water outlet, thereby realizing the large circulation state of the electrically controlled circulation device.

5. The electronically controlled flow device for engine coolant according to claim 1, characterized in that: The valve seat further comprises an outer cavity, which is arranged at the left part of the valve seat and adjacent to the inner cavity. A liquid return channel is arranged in the outer cavity, and one end of the liquid return channel is communicated with the liquid return hole.

6. The electronically controlled circulation device for engine coolant according to claim 5, characterized in that: It also includes a small circulation sealing structure, which is arranged at the mounting hole on the left part of the inner cavity and is located in the outer cavity. The small circulation sealing structure includes a second pressure sleeve, a second wave spring, a second C-groove + O-ring sealing structure and a second sealing gasket connected in sequence from right to left. When the electrically controlled circulation device is in a small circulation state, the ball valve port of the ball valve is aligned with the small circulation water outlet of the small circulation sealing structure, and the other end of the return liquid channel is connected to the inner cavity through the small circulation water outlet.

7. The electronically controlled circulation device for engine coolant according to claim 1, characterized in that: It also includes a side cover and a side cover O-ring, which are arranged at the mounting hole on the right part of the inner wall of the valve seat.

8. The electronically controlled flow device for engine coolant as claimed in claim 2, characterized in that: The electric control actuator is integrated with a motor, and the motor is in driving connection with the transmission shaft through the front sliding sleeve. The ECU controls the motor to drive the transmission shaft and the ball valve to rotate.

9. The electronically controlled circulation device for engine coolant according to claim 1, characterized in that: Also includes: A degassing connection column, which is arranged on the top of the valve seat, the degassing connection column is connected with the inner cavity, and the gas generated in the electric control flow device can be discharged from the degassing connection column at any time; as well as A water temperature sensor is arranged on the top of the valve seat and adjacent to the degassing connecting column. The water temperature sensor is used to monitor the temperature information of the coolant in the inner cavity in real time.

10. The electronically controlled circulation device for engine coolant according to claim 9, characterized in that: The water temperature sensor is typically data connected to the ECU and feeds back the temperature information of the coolant in the inner cavity to the ECU in real time.

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