Control valve device for engine coolant

Abstract

The utility model discloses an engine coolant control valve device which comprises a seat body and an electronic thermolator assembly arranged on the seat body, the electronic thermolator assembly comprises a sealing cover, a thermolator body, a wax bag, a large circulation cover plate, a small circulation cover plate, a body spring and an electric heating pipe; the sealing cover is connected with the seat body; the thermolator body is arranged at the sealing cover; the wax bag is arranged in the thermolator body; the large circulation cover plate and the small circulation cover plate are arranged at the two ends of the wax bag; the body spring is arranged between the large circulation cover plate and the small circulation cover plate; the electric heating pipe is arranged in the wax bag; wherein the electric heating pipe can heat and melt the wax bag, so that a large circulation state or a small circulation state of the electronic thermolator assembly is realized. According to the control valve device for the engine cooling liquid, the cooling liquid large circulation opening of the electronic thermolator assembly can be rapidly opened in an electric heating mode under the condition of environmental requirements, and the situation that the water temperature is too high is avoided.

Description

Technical Field

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

[0002] In order to establish a foothold in the development of the automotive industry and face the vision of the automotive industry development in 2035, the automotive industry technology will be further strengthened to be "low-carbon, information-based, and intelligent". 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] In view of the existing traditional energy power, a mechanical wax thermostat is required to realize the conversion of the coolant flow channel. The working principle is briefly described as follows: 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.

[0004] The existing mechanical wax thermostat has the following defects:

[0005] 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;

[0006] 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;

[0007] 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

[0008] The utility model aims to provide a control valve device for engine coolant, which can realize the rapid opening of the large coolant circulation port of the electronic thermostat component by electric heating when the environment requires, so as to avoid excessive water temperature.

[0009] To achieve the above-mentioned purpose, the utility model provides a control valve device for engine coolant, including a seat body and an electronic thermostat assembly arranged on the seat body, the seat body including a first mounting surface and a second mounting surface, the first mounting surface is used to connect with the cooling water circuit of the engine body, and the second mounting surface is used to connect the electronic thermostat assembly, the electronic thermostat assembly includes a sealing cover, a thermostat body, a wax bag, a large circulation cover plate and a small circulation cover plate, a body spring and an electric heating tube; the sealing cover is used to connect with the seat body; the thermostat body is arranged at the sealing cover; the wax bag is arranged in the thermostat body; the large circulation cover plate and the small circulation cover plate are arranged at both ends of the wax bag; the body spring is arranged between the large circulation cover plate and the small circulation cover plate; the electric heating tube is arranged in the wax bag; wherein the electric heating tube can heat the wax bag and melt it, thereby realizing the large circulation state or the small circulation state of the electronic thermostat assembly.

[0010] In a preferred embodiment, the seat body also includes a coolant inlet, a coolant storage cavity, a coolant small circulation collection port and a coolant small circulation port; the coolant inlet is arranged at the first mounting surface, and the coolant inlet is connected to the cooling water circuit of the engine body; the coolant storage cavity is arranged inside the seat body, and the coolant storage cavity is connected to the coolant inlet; the coolant small circulation collection port is arranged at the first mounting surface, and the coolant small circulation collection port is connected to the cooling water circuit of the engine body, and the coolant inlet and the coolant small circulation collection port are not connected at the first mounting surface; the coolant small circulation port is arranged inside the seat body, and is connected between the coolant storage cavity and the coolant small circulation collection port; wherein when the electronic thermostat assembly is in the small circulation state, the coolant enters the coolant storage cavity of the seat body from the coolant inlet, is collected at the coolant small circulation collection port through the coolant small circulation port, and finally flows back to the cooling water circuit of the engine body.

[0011] In a preferred embodiment, the base body also includes a large coolant circulation port, which is arranged on the second mounting surface of the base body, and the large coolant circulation port can be connected to the coolant storage cavity; when the electronic thermostat assembly is in a large circulation state, the coolant enters the coolant storage cavity of the base body from the coolant inlet, and finally flows out through the large coolant circulation port.

[0012] In a preferred embodiment, when the cover of the electronic thermostat assembly is installed on the base through the second mounting surface, the thermostat body and the small circulation cover plate integrally pass through the coolant large circulation port of the base body into the coolant storage chamber, and the large circulation cover plate blocks the coolant large circulation port.

[0013] In a preferred embodiment, the electronic thermostat assembly further comprises a large circulation outlet, which is arranged on the cover, and when the thermostat assembly is in a large circulation state, the large circulation outlet can be connected through the opened coolant large circulation port.

[0014] In a preferred embodiment, as the coolant temperature gradually increases, the wax bag begins to gradually melt and squeeze the main spring of the electronic thermostat assembly, causing the large circulation cover and the small circulation cover to move synchronously, so that the small circulation cover gradually seals the coolant small circulation port, while the large circulation cover gradually leaves the coolant large circulation port and opens it gradually, thereby realizing the transformation of the electronic thermostat assembly from the small circulation state to the large circulation state.

[0015] In a preferred embodiment, when the electronic thermostat assembly is in a large circulation state, the coolant enters the coolant storage chamber from the coolant inlet, enters the inner cavity of the cover through the coolant large circulation port, and finally flows out from the large circulation outlet.

[0016] In a preferred embodiment, the electronic thermostat assembly also includes an electronic control connector, which is arranged at the cover and electrically connected to the electric heating tube. The electronic control connector and the electric heating tube are both connected to the typical data of the vehicle ECU. The electric heating tube can assist and accelerate the melting speed of the wax bag and realize the rapid opening of the coolant large circulation port.

[0017] In a preferred embodiment, the seat body further includes a water temperature sensor hole and a degassing hole; the water temperature sensor hole is used to install the water temperature sensor; the degassing hole is used to install the degassing joint.

[0018] In a preferred embodiment, the seat body also includes a sealing ring groove and a thermostat sealing groove; the sealing ring groove is arranged on the second mounting surface and is arranged around the large circulation port of the coolant, and the sealing ring groove is used to install the sealing ring; the thermostat sealing groove is arranged at the large circulation port of the coolant, and is used to seal the large circulation port of the coolant through an O-ring and the large circulation cover plate.

[0019] Compared with the prior art, the control valve device for engine coolant of the utility model has the following beneficial effects:

[0020] 1. Ensure the normal operation mechanism of the engine at high water temperature, realize the layered linkage between water temperature and opening and closing action, and realize rapid opening and closing at both high and low water temperatures;

[0021] 2. Differentiated water temperature control for different market segments: different water temperature control programs can be entered for engines in different regions and working conditions, with high universality and low development cost;

[0022] 3. The overall water temperature of the engine thermal balance increases, the friction resistance of the moving parts inside the engine decreases, and the power consumption of accessories decreases;

[0023] 4. Electronically controlled heating, fast command response, total reaction time <30s, sufficient to cope with complex operating conditions and ensure engine operation safety;

[0024] 5. Modular design and development, with a degassing interface, ensures that the coolant is degassed before entering the device, 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 other hazards, thereby improving the reliability of the engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic diagram of an exploded structure of a control valve device according to an embodiment of the utility model;

[0026] Figure 2 is a cross-sectional view of an electronic thermostat, a sub-component of a control valve device according to an embodiment of the utility model;

[0027] Figure 3 It is a front view of an electronic thermostat, a sub-component of a control valve device according to an embodiment of the utility model;

[0028] Figure 4 It is a rear view of an electronic thermostat, a sub-component of a valve making device according to an embodiment of the utility model;

[0029] Figure 5 It is a front view of an electronic thermostat seat, a sub-component of a control valve device according to an embodiment of the utility model;

[0030] Figure 6 It is a cross-sectional view of an electronic thermostat seat, a sub-component of a control valve device according to an embodiment of the utility model;

[0031] Figure 7 It is a front isometric view of an electronic thermostat seat, a sub-component of a control valve device according to one embodiment of the utility model.

[0032] Description of main reference numerals:

[0033] 1-water temperature sensor, 2-first composite sealing pad, 3-seat, 3-1-coolant inlet, 3-2-coolant small circulation collection port, 3-3-coolant storage chamber, 3-4-coolant small circulation port, 3-5-thermostat sealing groove, 3-6-sealing ring groove, 3-7-degassing hole, 3-8-water temperature sensor hole, 3-9-threaded hole, 3-10-coolant large circulation port, 3-11-first mounting surface, 3-12-second mounting surface, 4-sealing ring, 5-electronics Thermostat assembly, 5-1-sealing cover, 5-2-O-ring, 5-3-thermostat body, 5-4-electric heating tube, 5-5-wax bag, 5-6-small circulation cover, 5-7-large circulation cover, 5-8-large circulation outlet, 5-9-electric control connector, 5-10-retaining ring, 5-11-cover seat connecting hole, 5-12-wiring harness fixing hole, 5-13-thermostat pendulum, 5-14-heating harness, 6-hexagonal head bolt, 7-second composite sealing gasket, 8-degassing connector. DETAILED DESCRIPTION

[0034] 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.

[0035] 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.

[0036] like Figures 1 to 7 As shown, according to a preferred embodiment of the utility model, a control valve device for engine coolant includes a seat body 3 and an electronic thermostat assembly 5 arranged on the seat body 3. The seat body 3 includes a first mounting surface 3-11 and a second mounting surface 3-12. The first mounting surface 3-11 is used to connect with the cooling water circuit of the engine body, and the second mounting surface 3-12 is used to connect the electronic thermostat assembly 5. The electronic thermostat assembly 5 includes a cover 5-1, a thermostat body 5-3, a wax bag 5-5, a large circulation cover plate 5-7 and a small circulation cover plate 5-6, a body spring And an electric heating tube 5-4; the cover 5-1 is used to connect with the base body 3; the thermostat body 5-3 is arranged at the cover 5-1; the wax bag 5-5 is arranged in the thermostat body 5-3; the large circulation cover plate 5-7 and the small circulation cover plate 5-6 are arranged at both ends of the wax bag 5-5; the body spring is arranged between the large circulation cover plate 5-7 and the small circulation cover plate 5-6; the electric heating tube 5-4 is arranged in the wax bag 5-5; wherein the electric heating tube 5-4 can heat the wax bag 5-5 and melt it, thereby realizing the large circulation state or the small circulation state of the electronic thermostat assembly 5.

[0037] See also Figures 5 to 7In some embodiments, the seat body 3 further includes a coolant inlet 3-1, a coolant storage cavity 3-3, a coolant small circulation collection port 3-2, and a coolant small circulation port 3-4; the coolant inlet 3-1 is arranged at the first mounting surface 3-11, and the coolant inlet 3-1 is connected to the cooling water path of the engine body; the coolant storage cavity 3-3 is arranged inside the seat body 3, and the coolant storage cavity 3-3 is connected to the coolant inlet 3-1; the coolant small circulation collection port 3-2 is arranged at the first mounting surface 3-11, and the coolant small circulation collection port 3-2 is connected to the engine body The cooling water circuit of the engine body is connected, and the coolant inlet 3-1 is not connected to the coolant small circulation collection port 3-2 at the first mounting surface 3-11; the coolant small circulation port 3-4 is arranged inside the seat body 3, and is connected between the coolant storage cavity 3-3 and the coolant small circulation collection port 3-2; when the electronic thermostat assembly 5 is in the small circulation state, the coolant enters the coolant storage cavity 3-3 of the seat body 3 from the coolant inlet 3-1, passes through the coolant small circulation port 3-4 and is collected at the coolant small circulation collection port 3-2, and finally flows back to the cooling water circuit of the engine body.

[0038] In some embodiments, the seat body 3 also includes a large coolant circulation port 3-10, which is arranged at the second mounting surface 3-12 of the seat body 3, and the large coolant circulation port 3-10 can be connected to the coolant storage cavity 3-3; wherein when the electronic thermostat assembly 5 is in a large circulation state, the coolant enters the coolant storage cavity 3-3 of the seat body 3 from the coolant inlet 3-1, and finally flows out through the large coolant circulation port 3-10.

[0039] In some embodiments, when the cover 5-1 of the electronic thermostat assembly 5 is installed on the base body 3 through the second mounting surface 3-12, the thermostat body 5-3 and the small circulation cover 5-6 integrally pass through the large circulation port 3-10 of the coolant of the base body 3 to enter the coolant storage chamber 3-3, and the large circulation cover 5-7 blocks the large circulation port 3-10 of the coolant.

[0040] In some embodiments, the electronic thermostat assembly 5 further includes a large circulation outlet 5-8, which is disposed on the cover 5-1. When the thermostat assembly is in a large circulation state, the large circulation outlet 5-8 can be connected through the opened coolant large circulation port 3-10.

[0041] In some embodiments, as the coolant temperature gradually increases, the wax bag 5-5 begins to gradually melt and squeeze the main spring of the electronic thermostat assembly 5, causing the large circulation cover 5-7 and the small circulation cover 5-6 to move synchronously, enabling the small circulation cover 5-6 to gradually seal the coolant small circulation port 3-4, while the large circulation cover 5-7 gradually leaves the coolant large circulation port 3-10 and gradually opens it, thereby enabling the electronic thermostat assembly 5 to transform from a small circulation state to a large circulation state.

[0042] In some embodiments, when the electronic thermostat assembly 5 is in a large circulation state, the coolant enters the coolant storage chamber 3-3 from the coolant inlet 3-1, enters the inner cavity of the cover 5-1 through the coolant large circulation port 3-10, and finally flows out from the large circulation outlet 5-8.

[0043] In some embodiments, the electronic thermostat assembly 5 also includes an electronically controlled connector 5-9, which is disposed at the cover 5-1 and electrically connected to the electric heating tube 5-4. Both the electronically controlled connector 5-9 and the electric heating tube 5-4 are connected to typical data of the vehicle ECU. The electric heating tube 5-4 can assist and accelerate the melting speed of the wax bag 5-5, thereby realizing the rapid opening of the large coolant circulation port 3-10.

[0044] In some embodiments, the external connection of the control valve device includes: the seat body 3 also includes a water temperature sensor hole 3-8 and a degassing hole 3-7; the water temperature sensor hole 3-8 is used to install the water temperature sensor 1, which is fixed to the seat body 3 by screwing with the water temperature sensor hole 3-8, and is sealed by the first composite sealing gasket 2; the degassing hole 3-7 is used to install the degassing joint 8, which is fixed to the seat body 3 by screwing with the degassing hole 3-7, and is sealed by the second composite sealing gasket. The seat body 3 and the electronic thermostat assembly 5 are connected through the cover seat connection hole 5-11, and the hexagonal bolt 6 is screwed into the threaded hole 3-9 to tighten, and the sealing ring 4 of the sealing ring groove 3-6 is installed at the same time to achieve end face sealing to prevent end face water leakage.

[0045] In some embodiments, the internal connection of the control valve device includes: the seat body 3 also includes a sealing ring groove 3-6 and a thermostat sealing groove 3-5; the sealing ring groove 3-6 is arranged on the second mounting surface 3-12 and is arranged around the large circulation port 3-10 of the coolant, and the sealing ring groove 3-6 is used to install the sealing ring 4; the thermostat sealing groove 3-5 is arranged at the large circulation port 3-10 of the coolant, and is used to seal the large circulation port 3-10 of the coolant through the O-ring 5-2 and the large circulation cover plate 5-7. The seat body 3 and the electronic thermostat assembly 5 are sealed with the O-ring 5-2 to achieve the inner end face sealing (the sealing structure includes the thermostat body 5-3, the thermostat sealing groove 3-5, the cover 5-1, the O-ring 5-2, etc.) to prevent the coolant from leaking.

[0046] In some embodiments, the internal structure of the control valve device mainly includes: the electronic thermostat assembly 5 is composed of a cover 5-1, an O-ring 5-2, a thermostat body 5-3, an electric heating tube 5-4, an electric control connector 5-9, and a retaining ring. The cover 5-1 includes a large circulation outlet 5-8 (through which the coolant flows into the radiator), a cover seat connecting hole 5-11 (connecting the cover 5-1 and the seat body 3), and a harness fixing hole 5-12 (fixing the electronic control harness); the thermostat body 5-3 is an integral double-laminate structure, including a wax bag 5-5, a small circulation cover plate 5-6 (opening and closing the small circulation port 3-4 for coolant), a large circulation cover plate 5-7 (opening and closing the large circulation port 3-10 for coolant and the large circulation outlet 5-8), and a thermostat pendulum 5-13 (exhausting gas during the coolant filling process); 5-10 is used to press the electronic control connector 5-9 to prevent shaking; the electric heating tube 5-4 is inserted into the thermostat body 5-3, and is used to heat the wax bag 5-5 with electricity to achieve its rapid melting and rapid opening of the thermostat.

[0047] In some embodiments, the coolant flow path of the control valve device is as follows: the coolant flows into the control valve device from the coolant inlet 3-1, and the coolant fills the coolant storage chamber 3-3. When the engine is stopped, idle or warmed up, the coolant temperature is low, and the small cycle is in a normally open state. That is, the coolant flows back to the engine through the coolant small cycle port 3-4 and the coolant small cycle collection port 3-2, and the cycle repeats.

[0048] In some embodiments, the control valve device includes the following working conditions:

[0049] Working condition 1: The engine speed increases steadily, and the water temperature continues to rise slowly. The wax package 5-5 inside the thermostat body 5-3 melts due to the heat, compressing the spring of the thermostat body 5-3. The small circulation cover 5-6 and the large circulation cover 5-7 move synchronously, so that the small circulation port 3-4 of the coolant is gradually blocked; the large circulation outlet gradually circulates until it is fully opened.

[0050] Working condition 2: For the models equipped with a retarder, when the retarder is turned on, the engine ECU uses the PWM communication method to connect the electronic control connector 5-9 through the wiring harness to complete the electrical signal transmission, so that 24V is supplied to the electric heating tube 5-4 to achieve rapid melting of the wax bag 5-5 and rapid opening of the large circulation outlet 5-8 to avoid excessive water temperature.

[0051] 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.

[0052] To sum up, the engine coolant control valve device of the utility model has the following advantages: ensuring the normal operating mechanism of the engine at high water temperature, realizing the layered linkage between water temperature and opening and closing action, and realizing fast opening and closing at both high and low water temperatures; differentiated water temperature control in the segmented market, realizing the engine to enter different water temperature control programs for different regions and working conditions, with high universality and low development cost; 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; electronically controlled heating, fast command response, and a total reaction time of <30s, which is sufficient to cope with complex operating conditions and ensure the safety of engine operation; modular design and development and matching degassing interface to ensure that the coolant is degassed before entering the device, to avoid air being 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, thereby improving the engine reliability.

[0053] 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 device for engine coolant, characterized in that: The invention comprises a seat body and an electronic thermostat assembly arranged on the seat body, wherein the seat body comprises a first mounting surface and a second mounting surface, wherein the first mounting surface is used to connect with a cooling water circuit of an engine body, and the second mounting surface is used to connect with the electronic thermostat assembly, and the electronic thermostat assembly comprises: A sealing cover, which is used to be connected with the seat body; A thermostat body, which is arranged at the cover; A wax bag, which is arranged in the thermostat body; A large circulation cover plate and a small circulation cover plate, which are arranged at two ends of the wax bag; a body spring, which is arranged between the large-circulation cover plate and the small-circulation cover plate; and An electric heating tube, which is arranged in the wax bag; The electric heating tube can heat the wax bag and melt it, thereby realizing the large circulation state or small circulation state of the electronic thermostat component.

2. The engine coolant control valve device according to claim 1, characterized in that: The seat body also includes: A coolant inlet, which is arranged at the first mounting surface and communicates with a cooling water path of the engine body; A coolant storage chamber, which is arranged inside the seat body, and the coolant storage chamber is communicated with the coolant inlet; a coolant small circulation collection port, which is arranged at the first mounting surface, the coolant small circulation collection port is connected to the cooling water path of the engine body, and the coolant inlet is not connected to the coolant small circulation collection port at the first mounting surface; and A small coolant circulation port, which is arranged inside the seat body and communicated between the coolant storage cavity and the small coolant circulation collection port; When the electronic thermostat assembly is in a small circulation state, the coolant enters the coolant storage cavity of the seat body from the coolant inlet, is collected at the coolant small circulation collection port through the coolant small circulation port, and finally flows back to the cooling water circuit of the engine body.

3. The control valve device for engine coolant according to claim 2, characterized in that: The seat body further comprises a large coolant circulation port, which is arranged on the second mounting surface of the seat body, and the large coolant circulation port can be communicated with the coolant storage cavity; When the electronic thermostat assembly is in a large circulation state, the coolant enters the coolant storage cavity of the seat body from the coolant inlet, and finally flows out through the coolant large circulation port.

4. The engine coolant control valve device according to claim 3, characterized in that: When the cover of the electronic thermostat assembly is installed on the base through the second mounting surface, the thermostat body and the small circulation cover plate integrally pass through the large circulation port of the coolant of the base body into the coolant storage cavity, and the large circulation cover plate blocks the large circulation port of the coolant.

5. The control valve device for engine coolant according to claim 3, characterized in that: The electronic thermostat assembly further comprises a large circulation outlet, which is arranged on the cover. When the thermostat assembly is in a large circulation state, the large circulation outlet can be connected through the opened coolant large circulation port.

6. The control valve device for engine coolant according to claim 5, characterized in that: As the coolant temperature gradually increases, the wax bag begins to melt gradually and squeezes the main spring of the electronic thermostat assembly, causing the large circulation cover and the small circulation cover to move synchronously, so that the small circulation cover gradually seals the coolant small circulation port, while the large circulation cover gradually leaves the coolant large circulation port and opens it gradually, thereby realizing the transformation of the electronic thermostat assembly from a small circulation state to a large circulation state.

7. The engine coolant control valve device according to claim 5, characterized in that: When the electronic thermostat assembly is in a large circulation state, the coolant enters the coolant storage cavity from the coolant inlet, enters the inner cavity of the cover through the coolant large circulation port, and finally flows out from the large circulation outlet.

8. The engine coolant control valve device according to claim 5, characterized in that: The electronic thermostat assembly also includes an electric control connector, which is arranged at the cover and electrically connected to the electric heating tube. The electric control connector and the electric heating tube are both connected to the typical data of the vehicle ECU. The electric heating tube can assist and accelerate the melting speed of the wax bag and realize the rapid opening of the coolant large circulation port.

9. The control valve device for engine coolant according to claim 3, characterized in that: The seat body also includes: a water temperature sensor hole for installing a water temperature sensor; and Degassing hole, which is used to install the degassing joint.

10. The engine coolant control valve device according to claim 3, characterized in that: The seat body also includes: a sealing ring groove, which is arranged on the second mounting surface and is arranged around the large coolant circulation port, and the sealing ring groove is used to install a sealing ring; and The thermostat sealing groove is arranged at the large circulation port of the coolant and is used to seal the large circulation port of the coolant through an O-ring in cooperation with the large circulation cover plate.

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