Control valve for engine coolant

Abstract

The utility model discloses a control valve for engine cooling liquid. The control valve comprises a seat body and an electronic thermolator, the seat body is of a cavity structure and comprises a first mounting surface and a second mounting surface which are oppositely arranged; the electronic thermolator is arranged at the second mounting surface and comprises a cover body which is of a hollow structure and comprises a mounting part, and the mounting part extends into the cavity structure of the seat body from the mounting hole of the second mounting surface; the thermolator body is arranged in the annular structure of the mounting part, and a wax bag is arranged in the thermolator body; the thermolator lower support and the thermolator upper rubber hanging support are arranged on the lower portion and the upper portion of the thermolator body respectively. The small circulation sealing cover is arranged at the lower end part of the thermolator body; the electric heating rod is arranged in the thermolator body and is in typical data connection with the whole vehicle ECU; the ECU can control the electric heating rod to heat the wax bag and enable the wax bag to be melted in an accelerated mode, and the control valve can be rapidly switched from a small circulation state to a large circulation state.

Description

Technical Field

[0001] The utility model relates to the field of engine design and manufacturing, in particular to a control valve for engine coolant. Background Art

[0002] In order to base on the development of the modern automobile industry and face the development vision of the automobile industry in 2035, we will further strengthen the "low-carbonization, informationization and intelligence" of automobile industry technology. The existing commercial vehicle 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, ammonia engines, hybrid fuel engines, fuel cell power, etc.

[0003] For the existing traditional energy power, the coolant control device mainly consists of:

[0004] 1) The mechanical thermostat realizes the conversion of the coolant flow channel. Briefly describe the working principle: when the engine is idling or unloaded at low speed, the engine coolant temperature is not high, the flow 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 flow 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 flow 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 mechanical wax thermostat of the prior art has the following defects:

[0006] 1. Based on the characteristics of paraffin formula, the opening temperature is fixed and cannot be adjusted after leaving the factory, and cannot be adjusted by customers; the full opening cycle is long, the response speed is slow, and it is impossible to achieve rapid cooling, which is prone to high water temperature, inducing local overheating and cracking failures in high-temperature components such as cylinder heads and cylinder blocks;

[0007] 2. The normal working water temperature of the engine is low, which leads to low oil temperature, higher oil viscosity, greater running resistance of internal moving parts and high fuel consumption; the heat generated by engine combustion is mostly absorbed by the coolant, resulting in low thermal efficiency of the whole machine;

[0008] 3. Poor compatibility with different models: Different design solutions are required to match different models to meet the requirements of water temperature, boundaries, etc.

[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 purpose of the utility model is to provide an engine coolant control valve, which has a high modular feature, integrates a seat body, an electronic thermostat and a water temperature sensor, keeps the engine running at a continuous high water temperature, and the water temperature is linked to the opening and closing action in layers, so that high and low water temperatures can achieve rapid opening and closing.

[0011] To achieve the above-mentioned purpose, the utility model provides a control valve for engine coolant, including a seat body and an electronic thermostat; the seat body is a cavity structure, the seat body includes a first mounting surface and a second mounting surface arranged oppositely, the first mounting surface is used to connect with the cooling passage of the engine body, and a coolant inlet and a small circulation outlet are arranged at the first mounting surface; the electronic thermostat is arranged at the second mounting surface, the electronic thermostat includes a cover body, a thermostat body, a lower bracket of the thermostat, a rubber bracket on the thermostat, a small circulation cover and an electric heating rod; the cover body is a hollow structure, the cover body includes a mounting part, and the mounting part extends from the mounting hole of the second mounting surface into the cavity structure of the seat body; the thermostat The thermostat body is arranged in the annular structure of the mounting part, and a wax bag is arranged inside the thermostat body; the thermostat lower bracket and the thermostat upper rubber bracket are arranged at the lower part and the upper part of the thermostat body respectively; the small circulation cover is arranged at the lower end part of the thermostat body; the electric heating rod is arranged inside the thermostat body, and the electric heating rod is connected with the typical data of the vehicle ECU; wherein the ECU can control the electric heating rod to heat the wax bag and accelerate its melting, so that the upper rubber bracket of the thermostat compresses the spring between the upper rubber bracket of the thermostat and the lower bracket of the thermostat, and drives the small circulation cover and the upper rubber bracket of the thermostat to move synchronously, so as to realize the rapid conversion of the control valve from the small circulation state to the large circulation state.

[0012] In a preferred embodiment, the electronic thermostat also includes a large circulation flow port, which is connected between the hollow structure of the cover body and the annular structure of the mounting part. When the control valve is in a small circulation state, the large circulation flow port is blocked by the rubber bracket on the thermostat, and a large circulation cavity is formed in the hollow structure of the cover body.

[0013] In a preferred embodiment, the seat body further comprises a multi-purpose cavity, which is arranged at the top of the seat body, the lower part of the multi-purpose cavity is connected with the internal cavity of the seat body, and the upper part of the multi-purpose cavity comprises an opening connected with the outside of the seat body.

[0014] In a preferred embodiment, the control valve of the engine coolant also includes a joint cover, a degassing joint and a water temperature sensor; the joint cover is arranged on the opening and is used to seal the opening; the degassing joint is arranged on the joint cover, and the degassing joint is connected to the multi-purpose cavity through the joint cover, and the gas generated inside the control valve can be discharged from the degassing joint; the water temperature sensor is arranged in the sensor hole on the seat body, the water temperature sensor is connected to the ECU typical data, and the water temperature sensor is used to monitor the temperature information of the coolant in the seat body in real time, and feed back the temperature information to the ECU in real time.

[0015] In a preferred embodiment, the control valve of the engine coolant also includes a liquid slow return water pipeline and a degassing joint; the liquid slow return water pipeline is sealed and assembled at the opening of the multi-purpose cavity; the degassing joint is arranged on the liquid slow return water pipeline, and the gas generated inside the control valve can be discharged from the degassing joint.

[0016] In a preferred embodiment, the electronic thermostat further comprises an electric control connector, which is arranged at the thermostat body, and the electric control connector is respectively connected to the electric heating rod and the ECU typical data.

[0017] In a preferred embodiment, the electronic thermostat also includes an air release valve arranged on the cover body, the air release valve includes an upper hole, a lower hole, a steel ball and a steel sleeve; the upper hole is arranged on the inner side of the cover body wall; the lower hole is arranged on the outer side of the cover body wall and is connected to the upper hole; the steel ball is arranged in the lower hole; the steel sleeve is embedded in the lower hole and restricts the steel ball between the upper hole and the steel sleeve.

[0018] In a preferred embodiment, the diameter of the steel ball is larger than the diameter of the upper hole, the diameter of the lower hole is larger than the diameter of the steel ball, the steel sleeve and the lower hole are pressed together, and the inner diameter of the steel sleeve is smaller than the diameter of the steel ball.

[0019] In a preferred embodiment, the electronic thermostat also includes a large circulation outlet, which is arranged on the cover body, and the large circulation outlet is connected to the hollow structure of the cover body. When the control valve is in the large circulation state, most of the coolant flows from the large circulation outlet to the radiator.

[0020] In a preferred embodiment, an anti-error positioning point is provided on the joint cover, and during assembly, the anti-error positioning point points to the rear end of the engine to ensure an assembly gap inside the device.

[0021] Compared with the prior art, the engine coolant control valve of the utility model has the following beneficial effects: it has the advantages of universal structure and wide application range; integrated degassing, simple and reliable structure, ensuring that the coolant is degassed before entering the control valve, avoiding air mixed in the coolant, causing irreversible corrosion to the internal parts of the engine, reducing the pumping efficiency of the water pump, and improving the reliability of the engine; the control valve has a high modular feature, integrating a seat body, an electronic thermostat and a water temperature sensor in one body, ensuring that the engine continues to run at a high water temperature, the water temperature and the opening and closing actions are linked in layers, and both high and low water temperatures can be opened and closed quickly; the control valve can be used for market-differentiated water temperature control, so that the engine can enter different water temperature control programs for different regions and working conditions, with high universality and low development cost; the control valve can ensure that the overall water temperature of the engine thermal balance is increased, the friction resistance of the internal moving parts of the engine is reduced, and the power consumption of accessories is reduced; the control valve is provided with an electronically controlled heating function, the command response is fast, and the total reaction time is less than 30s, which is sufficient to cope with complex operating conditions and ensure the safe operation of the engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of a three-dimensional exploded structure of a control valve according to an embodiment of the present invention;

[0023] Figure 2 is a schematic cross-sectional structural diagram of a seat body of a control valve according to an embodiment of the present invention;

[0024] Figure 3 is a schematic diagram of the three-dimensional structure of a seat body of a control valve according to an embodiment of the present invention;

[0025] Figure 4 is a schematic cross-sectional structural diagram of an electronic thermostat of a control valve according to an embodiment of the present invention;

[0026] Figure 5 is a schematic diagram of the main structure of an electronic thermostat of a control valve according to an embodiment of the present invention;

[0027] Figure 6 is a schematic diagram of the rear structural view of an electronic thermostat of a control valve according to an embodiment of the present invention;

[0028] Figure 7 is a schematic cross-sectional structural diagram of an electronic thermostat of a control valve according to an embodiment of the present invention;

[0029] Figure 8 is a schematic diagram of the front view of the second sealing ring of the control valve according to one embodiment of the present invention;

[0030] Fig. 9 It is a schematic diagram of the front structural view of a joint cover of a control valve according to an embodiment of the present invention.

[0031] Description of main reference numerals:

[0032] 1-degassing joint, 2-first bolt, 3-first composite sealing gasket, 4-joint cover, 4-1-anti-mistake positioning point, 5-first sealing ring, 6-seat body, 6-1-small circulation outlet, 6-2-small circulation storage chamber, 6-3-small circulation flow port, 6-4-regular through hole, 6-5-coolant mixing chamber, 6-6-mounting hole, 6-7-coolant flow inlet, 6-8-sensor hole, 6-9-multi-purpose chamber, 6-10-first sealing ring groove, 6-11-cover seat connecting screw hole, 6-12-second sealing ring groove, 6-13-sealing ring groove positioning hole, 6-14-first mounting surface, 6-15-second mounting surface, 7-second composite sealing gasket, 8-water temperature sensor, 9-second sealing ring, 9-1-sealing ring body, 9-2-sealing ring Positioning boss, 9-3-sealing ring convex point, 10-electronic thermostat, 10-1-cover body, 10-2-large circulation flow port, 10-3-card slot, 10-4-lower bracket of thermostat, 10-5-rubber bracket on thermostat, 10-6-electric heating rod, 10-7-small circulation cover, 10-8-wax bag, 10-9-thermostat body, 10-10-large circulation cavity, 10-11-circlip, 10-12-electric control connector, 10-13-large circulation outlet, 10-14-wiring harness fixing hole, 10-15-cover seat connecting hole, 10-16-air relief valve, 10-17-upper hole, 10-18-steel ball, 10-19-steel sleeve, 10-20-lower hole, 11-second bolt, 12-third bolt, 13-fourth bolt. DETAILED DESCRIPTION

[0033] 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.

[0034] 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.

[0035] like Figures 1 to 9 As shown, a control valve for engine coolant according to a preferred embodiment of the utility model:

[0036] In some embodiments, the control valve has the following structural arrangements:

[0037] (1) Structural layout (high adaptability 1): Highly adaptable electronic temperature control device, the coolant inflow includes two matching states:

[0038] ① Basic type (liquid buffer-free), the coolant flows in from the coolant inlet 6-7 in the seat body 6, the multi-purpose cavity 6-9 is sealed with a joint cover 4, and a degassing joint 1 is installed for degassing to avoid gas cavitation inside the device.

[0039] ② Liquid-buffered model, the coolant flows in from the coolant inlet 6-7 in the seat body 6 and the multi-purpose chamber 6-9 (at this time, the multi-purpose chamber 6-9 is not used to assemble the joint cover 4 but to assemble the liquid-buffered return water pipeline (not shown), and the degassing joint 1 is arranged in the liquid-buffered return water pipeline), and the coolant converges in the coolant mixing chamber 6-5.

[0040] (2) Structural layout (high adaptability 2): Highly adaptable electric temperature control device (off mode), the coolant flows from the coolant mixing chamber 6-5 into the small circulation flow port 6-3 and the normal through hole 6-4, and is matched with different types of radiators and whether to match the liquid buffer. The size of the normal through hole 6-4 can be adjusted to achieve appropriate matching of system resistance, and the seat body 6 can achieve common mode, reducing costs and increasing efficiency.

[0041] (3) Structural layout (high adaptability 3): Highly adaptable electric temperature control device (open mode), the coolant flows from the coolant mixing chamber 6-5 into the gap between the large circulation flow port 10-2 and the rubber bracket 10-5 on the thermostat, enters the large circulation cavity 10-10, and finally flows out of the large circulation cavity 10-10; the designed flow rate is 500L / min~650L / min, the universal version flow diameter (component flow resistance <30kPa), and the thermostat body 10-9 structure is universal.

[0042] (4) Structural layout (high adaptability 4): The highly adaptable electric control temperature regulating device has the same or similar platform as the fixed boundary, so that the base body 6 and the cover body 10-1 mold are universal; the first sealing ring 5, the second sealing ring 9, the electric heating rod 10-6, the retaining ring 10-11, and the electric control connector 10-12 are completely universal.

[0043] In some embodiments, the control valve of the engine coolant of the preferred embodiment of the utility model works in the following manner:

[0044] The coolant is quickly filled into the coolant mixing chamber 6-5 from the seat body 6. When the engine is in idle state, low speed or warm-up state, the water temperature is low and it is in the small circulation working mode. The coolant circulates internally, that is, it flows from the coolant mixing chamber 6-5 into the two small circulation flow ports 6-3 and the normal through hole 6-4 and is collected in the small circulation storage chamber 6-2, and flows back to the engine from the small circulation outlet 6-1, so as to quickly increase the water temperature. When the engine water temperature rises rapidly and it is in the large circulation working mode, the coolant circulates externally, that is, it flows from the coolant mixing chamber 6-5 into the large circulation cavity 10-10 through the gap between the large circulation flow port 10-2 of the cover body 10-1 and the thermostat rubber bracket 10-5, and finally flows into the radiator from the large circulation cavity 10-10, but a small amount of coolant still flows back to the engine through the normal through hole 6-4, so as to reduce the overall resistance of the cooling system.

[0045] In some embodiments, the control valve of the engine coolant of the preferred embodiment of the utility model has the following assembly structure:

[0046] The seat body 6 and the electronic thermostat 10 are fastened together by the cover seat connecting hole 10-15 on the cover body 10-1 and the cover seat connecting screw hole 6-11 in cooperation with the second bolt 11. The second sealing ring 9 completes the sealing (sealing ring body 9-1) as the sealing body, and the sealing ring protrusion 9-3 realizes stable and uniform force on both sides of the sealing ring and keeps the sealing ring locked in the second sealing ring groove 6-12. The sealing ring positioning boss 9-2 fixes the second sealing ring 9 in the sealing ring groove positioning hole 6-13 to prevent the sealing ring from being installed upside down and shifted.

[0047] The thermostat body 10-9 includes: a wax bag 10-8, a thermostat lower bracket 10-4, a thermostat upper glue bracket 10-5 and a small circulation cover 10-7.

[0048] The cover body 10-1 includes: a large circulation flow port 10-2, a card slot 10-3, an entrance large circulation cavity 10-10, a harness fixing hole 10-14, a cover seat connecting hole 10-15, an air release valve 10-16, an upper hole 10-17, a steel ball 10-18, a steel sleeve 10-19, and a lower hole 10-20.

[0049] The air relief valve 10-16 comprises an upper hole 10-17, a steel ball 10-18, a steel sleeve 10-19 and a lower hole 10-20.

[0050] The electric control connector 10-12 is fixed by the retaining spring 10-11; the thermostat upper rubber bracket 10-5 and the large circulation flow port 10-2 are sealed to block the large circulation, and the engine is in a closed state when it is stopped; when the wax bag 10-8 in the thermostat body 10-9 senses the water temperature, the solid material liquefies, and the spring is compressed, the thermostat small circulation cover 10-7 and the thermostat upper rubber bracket 10-5 move synchronously, the small circulation flow port 6-3 is closed, the large circulation flow port 10-2 is opened, and the coolant flows into the large circulation cavity 10-10, but part of it still flows rapidly into the small circulation outlet 6-1 through the regular through hole 6-4 and flows back to the engine. The electric heating rod 10-6 is inserted into the thermostat body 10-9, which is used to heat the wax bag 10-8 with electricity to achieve its rapid melting and the thermostat opens quickly.

[0051] Electronic thermostat 10: Thermostat body 10-9, the thermostat lower bracket 10-4 in the compression spring, rotate and press into the slot 10-3, to achieve fixation with the cover body 10-1; the air relief valve 10-16 is located on the cover body 10-1, firstly process the upper hole 10-17 and the lower hole 10-20, install the steel ball 10-18, and finally press the steel sleeve 10-19.

[0052] The working principle of the drain valve 10-16 is roughly as follows: during the gradual filling of coolant, the gas inside the engine passes through the gap between the steel ball 10-18 and the lower hole 10-20 and flows out through the upper hole 10-17; after the coolant is filled, the internal resistance of the engine is greater than the external resistance, the steel ball completely blocks the upper hole 10-17, and no coolant flows out.

[0053] The coolant inlet 6-7 is connected to the machine cooling outlet and sealed with a sealing ring (the machine cooling comes with it, not shown); the water temperature sensor hole 6-8 on the seat body 6 is fixed with the water temperature sensor 8 and sealed by the second composite sealing gasket 2; the water temperature sensor 8 constantly senses the coolant temperature and transmits electrical signals to the ECU through the wiring harness, and the ECU makes a judgment based on the signal; when the engine is stopped, idle or warmed up, the coolant temperature is low and is in a small circulation working state. That is, the coolant flows back to the engine through the small circulation flow port 6-3 at the small circulation outlet 6-1, and circulates back and forth.

[0054] In some embodiments, the control valve of the engine coolant of the preferred embodiment of the utility model can adapt to a variety of working conditions:

[0055] Working condition 1: The engine speed increases steadily, the water temperature increases slowly and continuously, the wax package 10-8 inside the thermostat body 10-9 melts due to the heat, compressing the spring of the thermostat body 10-9, and the small circulation cover 10-7 and the rubber bracket 10-5 on the thermostat move synchronously, so that the small circulation flow port 6-3 is gradually blocked; the large circulation flow port 10-2 gradually flows until it is fully opened.

[0056] Working condition 2: For models equipped with a retarder, when the retarder is turned on, the engine ECU uses PWM communication to connect the electronic control connector 10-12 through the wiring harness to complete the electrical signal transmission, so that 24V is supplied to the electric heating rod 10-6 to achieve rapid melting of the wax bag 10-8 and rapid opening of the large circulation flow port 10-2 to avoid excessive water temperature.

[0057] Working condition three: Achieve differentiated water temperature control for different market segments. For vehicles operating in cold and high altitude environments for a long time, the operating water temperature can be appropriately increased by 3-6°C; for vehicles operating in high temperature environments for a long time, the operating water temperature can be slightly reduced (1-3°C). By adjusting the ECU control strategy, highly economical operating water temperatures can be achieved in different working conditions to ensure the normal operation of the engine.

[0058] In summary, the engine coolant control valve of the utility model has the following advantages: it has the advantages of universal structure and wide application range; integrated degassing, simple and reliable structure, ensuring that the coolant is degassed before entering the control valve, avoiding air mixed in the coolant, causing irreversible corrosion to the internal parts of the engine, reducing the pumping efficiency of the water pump, and improving the reliability of the engine; the control valve has a high modular feature, integrating a seat body, an electronic thermostat and a water temperature sensor in one, ensuring that the engine continues to run at a high water temperature, the water temperature and the opening and closing actions are linked in layers, and both high and low water temperatures can be opened and closed quickly; the control valve can be segmented for market-differentiated water temperature control, and different water temperature control programs can be entered for the engine for different regions and working conditions, with high universality and low development cost; the control valve can ensure that the overall water temperature of the engine thermal balance is increased, the friction resistance of the moving parts inside the engine is reduced, and the power consumption of accessories is reduced; the control valve is provided with an electronically controlled heating function, the command response is fast, and the total reaction time is less than 30s, which is sufficient to cope with complex operating conditions and ensure the safe operation of the engine.

[0059] 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. A control valve for engine coolant, characterized in that: include: The seat body is a hollow structure, and the seat body includes a first mounting surface and a second mounting surface which are arranged opposite to each other, the first mounting surface is used to connect with the cooling passage of the engine body, and a coolant inlet and a small circulation outlet are arranged at the first mounting surface; as well as An electronic thermostat, which is arranged at the second mounting surface, and the electronic thermostat comprises: A cover body having a hollow structure, the cover body comprising a mounting portion, the mounting portion extending from the mounting hole of the second mounting surface into the cavity structure of the base body; A thermostat body, which is arranged in the annular structure of the mounting portion, and a wax bag is arranged inside the thermostat body; The lower bracket of the thermostat and the upper bracket of the thermostat are respectively arranged at the lower part and the upper part of the thermostat body; A small circulation cover, which is arranged at the lower end of the thermostat body; and An electric heating rod, which is arranged inside the thermostat body and is connected to the typical data of the vehicle ECU; The ECU can control the electric heating rod to heat the wax bag and accelerate its melting, so that the upper rubber bracket of the thermostat compresses the spring located between the upper rubber bracket of the thermostat and the lower bracket of the thermostat, and drives the small circulation cover and the upper rubber bracket of the thermostat to move synchronously, thereby realizing the rapid conversion of the control valve from the small circulation state to the large circulation state.

2. The engine coolant control valve according to claim 1, characterized in that: The electronic thermostat also includes a large circulation flow port, which is connected between the hollow structure of the cover body and the annular structure of the mounting portion. When the control valve is in a small circulation state, the large circulation flow port is blocked by the rubber bracket on the thermostat, and a large circulation cavity is formed in the hollow structure of the cover body.

3. The engine coolant control valve according to claim 2, characterized in that: The seat body further comprises a multi-purpose cavity which is arranged at the top of the seat body, the lower part of the multi-purpose cavity is communicated with the internal cavity of the seat body, and the upper part of the multi-purpose cavity comprises an opening communicated with the outside of the seat body.

4. The engine coolant control valve according to claim 3, characterized in that: Also includes: A joint cover, which is arranged on the opening and used to seal the opening; a degassing joint, which is arranged on the joint cover, the degassing joint is connected with the multi-purpose cavity through the joint cover, and the gas generated inside the control valve can be discharged from the degassing joint; and A water temperature sensor is arranged in a sensor hole on the seat body. The water temperature sensor is connected to the ECU typical data. The water temperature sensor is used to monitor the temperature information of the coolant in the seat body in real time and feed the temperature information back to the ECU in real time.

5. The engine coolant control valve according to claim 3, characterized in that: Also includes: A liquid slow return water pipeline, which is sealed and assembled at the opening of the multi-purpose cavity; as well as A degassing joint is arranged on the liquid buffer return pipeline, and the gas generated inside the control valve can be discharged from the degassing joint.

6. The engine coolant control valve according to claim 2, characterized in that: The electronic thermostat further comprises an electric control connector, which is arranged at the thermostat body, and the electric control connector is respectively connected to the electric heating rod and the ECU typical data.

7. The engine coolant control valve according to claim 2, characterized in that: The electronic thermostat further comprises an air release valve, which is arranged on the cover body, and the air release valve comprises: an upper hole, which is arranged on the inner side of the cover wall; a lower hole, which is arranged on the outer side of the cover body wall and communicated with the upper hole; a steel ball disposed in the lower hole; and A steel sleeve is embedded in the lower hole and restricts the steel ball between the upper hole and the steel sleeve.

8. The engine coolant control valve according to claim 7, characterized in that: The diameter of the steel ball is larger than the diameter of the upper hole, the diameter of the lower hole is larger than the diameter of the steel ball, the steel sleeve and the lower hole are pressed together, and the inner diameter of the steel sleeve is smaller than the diameter of the steel ball.

9. The engine coolant control valve according to claim 2, characterized in that: The electronic thermostat also includes a large circulation outlet, which is arranged on the cover body. The large circulation outlet is connected to the hollow structure of the cover body. When the control valve is in the large circulation state, most of the coolant flows from the large circulation outlet to the radiator.

10. The engine coolant control valve according to claim 4, characterized in that: The joint cover is provided with an anti-error positioning point, which points to the rear end of the engine during assembly to ensure the assembly clearance inside the device.

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