Engine thermal management method and system for hybrid vehicle and hybrid vehicle

Abstract

This application provides a method, system, and hybrid vehicle for engine thermal management of a hybrid vehicle. The system can receive the temperature of the gas entering the engine from a first temperature sensor. When the temperature of the gas entering the engine is determined to be greater than a set first temperature threshold, the input terminal of a control switching component is disconnected from its first output terminal, and the input terminal of the control switching component is connected to its second output terminal. This connects the main cooling path and the second switchable branch, forming a loop. This allows the first coolant in the battery cooling circuit to exchange heat with the engine intake branch. Since the temperature of the first coolant in the battery cooling circuit is lower than the temperature of the second coolant in the intake cooling circuit, the gas temperature in the engine intake branch can be cooled, thereby reducing the temperature of the gas entering the engine and preventing a decrease in engine output power or even engine stalling.

Description

Technical Field

[0001] This application relates to the field of vehicle engine technology, and in particular to a method, system and hybrid vehicle engine thermal management for hybrid vehicles. Background Technology

[0002] Hybrid vehicle engines draw air into the cylinders as a combustion aid. The oxygen in the air mixes with the injected fuel, and after compression, the mixture is ignited by the spark plug (or compression ignition). This creates a high-temperature, high-pressure gas that expands and pushes the piston to do work, thus converting the chemical energy of the fuel into mechanical energy. Currently, without significantly increasing engine displacement and weight, turbocharging increases intake air density, allowing the engine to "eat" more air and thus inject more fuel, thereby greatly improving power output and efficiency.

[0003] However, the air temperature after turbocharging is very high, so it needs to be reduced using the intake cooling circuit before entering the engine. The intake cooling circuit works as follows: the coolant in the intake cooling circuit carries the heat from the turbocharged air to the radiator. The air flowing through the radiator carries away the heat, causing the coolant to cool down and flow back. Thus, the faster the airflow, the higher the radiator's heat dissipation efficiency, effectively reducing the air temperature to the target temperature (e.g., 60 degrees Celsius).

[0004] Currently, in some hybrid vehicles operating at low speeds but requiring high engine output power (such as off-road driving or low-speed air conditioning operation), the airflow velocity entering the air grille is low, making it difficult to effectively dissipate heat from the coolant. As a result, the temperature of the air in the intake cooling circuit (e.g., 80 degrees Celsius) cannot be reduced to the target temperature. Furthermore, the density of high-temperature air is low, resulting in a reduction in oxygen content per unit volume. In order to maintain the air-fuel ratio, the engine electronic control system has to limit the amount of fuel injected, which leads to a decrease in engine output power or even engine failure. Summary of the Invention

[0005] This application provides a method, system, and hybrid vehicle for engine thermal management of a hybrid vehicle, which solves the problem in the prior art that in some scenarios where the driving speed of a hybrid vehicle is low but the engine output power demand is high (such as when the vehicle is in an off-road sand driving scenario or when the air conditioner is on at low speed), the air flow rate entering the air grille of the hybrid vehicle is low, making it difficult to effectively dissipate heat from the coolant, thereby causing the temperature of the air in the intake cooling circuit to fail to drop to the target temperature.

[0006] In a first aspect, this application provides an engine thermal management method for a hybrid vehicle, applied to an on-board controller in the engine thermal management system of a hybrid vehicle. The engine thermal management system further includes a battery cooling circuit, an intake air cooling circuit, and an engine intake branch. The battery cooling circuit includes a main cooling path, a first switchable branch, a second switchable branch, and a switching component. The main cooling path and the first switchable branch are connected end-to-end, and the second switchable branch is connected in parallel with the first switchable branch. The input terminal of the switching component is connected to the main cooling path, the first output terminal of the switching component is connected to the first switchable branch, and the second output terminal of the switching component is connected to the second switchable branch. The first switchable branch and the engine intake branch are spaced apart, and the second switchable branch is in contact with the engine intake branch. The temperature of the first coolant in the battery cooling circuit is lower than the temperature of the second coolant in the intake air cooling circuit, and the engine intake branch is equipped with a first temperature sensor. The method provided in this application includes: Receives the temperature of the gas entering the engine from the first temperature sensor; When it is determined that the temperature of the gas entering the engine is greater than the set first temperature threshold, the input terminal of the control switching component is disconnected from the first output terminal, and the input terminal of the control switching component is connected to the second output terminal, so that the main cooling path and the second switchable branch are connected and form a loop.

[0007] In some embodiments, the main cooling path includes a second temperature sensor and a cooling assembly. After the input terminal of the control switching assembly is disconnected from the first output terminal and the input terminal of the control switching assembly is connected to the second output terminal, the method provided in this application further includes: Receive the temperature of the first coolant in the battery cooling circuit collected by the second temperature sensor; If the temperature of the first coolant is lower than a set second temperature threshold, the rate of temperature increase of the first coolant is determined, wherein the second temperature threshold is less than the first temperature threshold. When the rate of temperature rise of the first coolant exceeds a set rate threshold, the cooling components are controlled to improve the cooling efficiency of the battery cooling circuit.

[0008] In some embodiments, the cooling assembly includes a heat exchange assembly and a first coolant pump, and controlling the cooling assembly to improve the cooling efficiency of the battery cooling circuit includes: If the rate of temperature rise of the first coolant exceeds a set rate threshold, the heat exchange components are controlled to increase their operating power and the first coolant pump is controlled to increase its speed.

[0009] In some embodiments, after the input terminal of the control switching component is disconnected from the first output terminal and the input terminal of the control switching component is connected to the second output terminal, the method provided in this application further includes: When the temperature of the first coolant is higher than or equal to the set second temperature threshold, the cooling components are controlled to operate at full load.

[0010] In some embodiments, the method provided in this application further includes: When the temperature of the first coolant is higher than or equal to the set second temperature threshold, the input terminal of the control switching component is connected to the first output terminal, and the input terminal of the control switching component is disconnected from the second output terminal, so that the main cooling path is connected to the first switchable branch and forms a loop.

[0011] In some embodiments, after the input terminal of the control switching component is connected to the first output terminal and the input terminal of the control switching component is disconnected from the second output terminal, the method provided in this application further includes: When the temperature of the first coolant drops to a set third temperature threshold, the input terminal of the switching component is disconnected from the first output terminal, and the input terminal of the switching component is connected to the second output terminal, wherein the difference between the second temperature threshold and the third temperature threshold is greater than a set difference threshold.

[0012] In some embodiments, the intake cooling circuit is provided with a second coolant pump. After the input terminal of the control switching component is disconnected from the first output terminal and the input terminal of the control switching component is connected to the second output terminal, the method provided in this application further includes: controlling the second coolant pump to shut down. After the input terminal of the control switching component is connected to the first output terminal, and the input terminal of the control switching component is disconnected from the second output terminal, the method provided in this application further includes: If the second coolant pump is in the off state, control the second coolant pump to turn on.

[0013] In some implementations, the switching component is a solenoid three-way valve.

[0014] In some embodiments, the main cooling path includes a battery, a heat exchange assembly, and a first coolant pump connected via a first coolant pipe. The heat exchange assembly is connected to the outputs of a first switchable branch and a second switchable branch, respectively, and the battery is connected to the output of the heat exchange assembly.

[0015] In some embodiments, the engine intake branch includes an air intake port, a turbocharger, and an engine intake manifold, which are sequentially connected via an air delivery pipe. The intake cooling circuit includes a water-cooled intercooler, a heat dissipation assembly, an expansion tank, and a second coolant pump, all connected in series based on the second coolant pipes.

[0016] In some implementations, a portion of the air supply pipe between the turbocharger and the engine intake manifold, a second switchable branch, and a portion of the second coolant pipe are all located inside the water-cooled intercooler, while the first switchable branch is located outside the water-cooled intercooler.

[0017] Secondly, this application also provides an engine thermal management system for a hybrid vehicle, including an on-board controller, a battery cooling circuit, an intake cooling circuit, a switching component, and an engine intake branch. One end of the switching component is connected to the battery cooling circuit, and the other end of the switching component is connected to the intake cooling circuit. Both the battery cooling circuit and the intake cooling circuit are in contact with the engine intake branch. The temperature of the first coolant in the battery cooling circuit is lower than the temperature of the second coolant in the intake cooling circuit. A first temperature sensor is provided at the outlet of the engine intake branch. The on-board controller is used to execute the method provided in the first aspect of this application.

[0018] Secondly, this application also provides a hybrid vehicle equipped with the engine thermal management system of the hybrid vehicle provided in the first aspect of this application.

[0019] Thirdly, this application also provides a storage medium storing a computer program, which, when executed by an on-board controller, causes the computer to perform the method provided in the first aspect of this application.

[0020] Fourthly, this application also provides a computer program product, including a computer program that, when run, causes the vehicle controller to perform the method provided in the first aspect of this application.

[0021] This application provides a method, system, and hybrid vehicle for engine thermal management of a hybrid electric vehicle. The system can receive the temperature of the gas entering the engine from a first temperature sensor. When the temperature of the gas entering the engine is determined to be greater than a set first temperature threshold, the input terminal of a switching component is disconnected from its first output terminal, and the input terminal of the switching component is connected to its second output terminal, so that the main cooling path and the second switchable branch are connected and form a loop. Since the first switchable branch is spaced apart from the engine intake branch, and the second switchable branch is in contact with the engine intake branch, heat exchange can occur between the first coolant in the battery cooling circuit and the engine intake branch. Because the temperature of the first coolant in the battery cooling circuit is lower than the temperature of the second coolant in the intake cooling circuit, the gas temperature in the engine intake branch can be further reduced, thereby lowering the temperature of the gas entering the engine. Thus, even when the hybrid vehicle is traveling at low speeds but the engine output power demand is high, the engine output power will not decrease or the vehicle will break down. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 A schematic diagram of the engine thermal management system of a hybrid vehicle provided in an embodiment of this application in its first operating state; Figure 2 One of the flowcharts for a hybrid vehicle engine thermal management method provided in an embodiment of this application; Figure 3 A schematic diagram of the engine thermal management system of a hybrid vehicle provided in an embodiment of this application in its second operating state; Figure 4 The second flowchart is a method for engine thermal management of a hybrid vehicle provided in an embodiment of this application. Detailed Implementation

[0024] Embodiments of the present disclosure will now be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the disclosure. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concepts of the present disclosure.

[0025] The accompanying drawings illustrate various structural schematics according to embodiments of the present disclosure. These drawings are not to scale, and some details have been enlarged for clarity, and some details may have been omitted. The shapes of the various regions and layers shown in the drawings, as well as their relative sizes and positional relationships, are merely exemplary and may deviate from reality due to manufacturing tolerances or technical limitations. Furthermore, those skilled in the art can design regions / layers with different shapes, sizes, and relative positions as needed.

[0026] In the context of this disclosure, when a layer / element is referred to as being "above" another layer / element, the layer / element may be directly above the other layer / element, or there may be an intermediate layer / element between them. Additionally, if a layer / element is "above" another layer / element in one orientation, then when the orientation is reversed, the layer / element may be "below" the other layer / element.

[0027] The technical solutions of this application and how they solve the aforementioned technical problems will be described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0028] This application provides an engine thermal management method for hybrid vehicles, applied to the on-board controller in the engine thermal management system of hybrid vehicles. For example... Figure 1 As shown, the engine thermal management system also includes a battery cooling circuit, an intake air cooling circuit, and an engine intake branch. For example... Figure 2 As shown, the battery cooling circuit includes a main cooling path, a first switchable branch 116, a second switchable branch 117, and a switching component 107. The main cooling path is connected end-to-end with the first switchable branch 116, and the second switchable branch 117 is connected in parallel with the first switchable branch 116.

[0029] Specifically, the input terminal of the switching component 107 is connected to the main cooling path, the first output terminal of the switching component 107 is connected to the first switchable branch 116, and the second output terminal of the switching component 107 is connected to the second switchable branch 117. The first switchable branch 116 is spaced apart from the engine intake branch, and the second switchable branch 117 is in contact with the engine intake branch. The temperature of the first coolant in the battery cooling circuit is lower than the temperature of the second coolant in the intake cooling circuit, and the engine intake branch is equipped with a first temperature sensor 113. For example, the switching component 107 may be, but is limited to, a solenoid three-way valve.

[0030] Still Figure 1 As shown, the main cooling path includes a battery 101, a heat exchange assembly 106, and a first coolant pump 103 connected via a first coolant pipe. The heat exchange assembly 106 is connected to the outputs of a first switchable branch 116 and a second switchable branch 117, respectively. The battery 101 is connected to the output of the heat exchange assembly 106. In this way, the heat exchange assembly 106 can directly cool the heated coolant exiting the second switchable branch 117, thereby improving the cooling efficiency of the heated coolant exiting the second switchable branch 117.

[0031] Furthermore, the engine intake branch includes an air intake port connected in sequence via an air supply pipe, a turbocharger 112, and an engine intake manifold 114, and the engine intake manifold is connected to the engine 115. The intake cooling circuit includes a water-cooled intercooler 108 connected in series via a second coolant pipe, a heat dissipation assembly 109, an expansion tank 110, and a second coolant pump 111.

[0032] The portion of the air supply pipe between the turbocharger 112 and the engine intake manifold 114, the second switchable branch 117, and a portion of the second coolant pipe are all located inside the water-cooled intercooler 108. This facilitates heat exchange between the coolant in the second switchable branch and the gas in the air supply pipe, as well as between the coolant in the intake cooling circuit and the gas in the air supply pipe. The first switchable branch 116 is located outside the water-cooled intercooler 108, which allows for thermal isolation between the coolant in the second switchable branch and the gas in the air supply pipe.

[0033] like Figure 2 As shown, the method provided in this application embodiment includes: S201: Receive the gas temperature entering the engine 115 collected by the first temperature sensor 113.

[0034] S202: When it is determined that the temperature of the gas entering the engine 115 is greater than the set first temperature threshold, the input terminal of the control switching component 107 is disconnected from the first output terminal, and the input terminal of the control switching component 107 is connected to the second output terminal, so that the main cooling path and the second switchable branch 117 are connected and form a loop.

[0035] For example, the first temperature threshold may be, but is not limited to, 60°C, 65°C, or 70°C.

[0036] It should be noted that before the main cooling path connects to the second switchable branch 117, the coolant circulation direction in the battery cooling circuit and the coolant circulation direction in the intake cooling circuit are as follows: Figure 1 As shown by the arrow in the image.

[0037] After the main cooling path is connected to the second switchable branch 117, the coolant circulation direction in the battery cooling circuit can be as follows: Figure 3 As shown by the arrow in the image.

[0038] In summary, the engine thermal management method for a hybrid vehicle provided in this application embodiment can receive the gas temperature entering the engine 115 collected by the first temperature sensor 113. When it is determined that the gas temperature entering the engine 115 is greater than a set first temperature threshold, the input terminal of the switching component 107 is disconnected from the first output terminal, and the input terminal of the switching component 107 is connected to the second output terminal, so that the main cooling path and the second switchable branch 117 are connected and form a loop. Since the first switchable branch 116 is spaced apart from the engine intake branch, and the second switchable branch 117 is in contact with the engine intake branch, the first coolant in the battery cooling circuit can exchange heat with the engine intake branch. Because the temperature of the first coolant in the battery cooling circuit is lower than the temperature of the second coolant in the intake cooling circuit, the gas temperature in the engine intake branch can be further reduced, thereby lowering the gas temperature entering the engine 115. Thus, even if a hybrid vehicle is in a scenario where the driving speed is low but the engine 115 output power demand is high, it will not cause the engine 115 output power to decrease or even break down.

[0039] In addition, as before Figure 1 As shown, the main cooling path includes the second temperature sensor 102 and the cooling assembly. After S202, as... Figure 4 As shown, the method provided in this application embodiment further includes: S203: Receives the temperature of the first coolant in the battery cooling circuit collected by the second temperature sensor 102.

[0040] S204: If the temperature of the first coolant is lower than a set second temperature threshold, determine the rate of temperature increase of the first coolant, wherein the second temperature threshold is less than the first temperature threshold.

[0041] It should be noted that the second temperature threshold can be understood as the upper limit of the safe operating temperature of battery 101. The second temperature threshold can be, but is not limited to, 45°C, 50°C or 55°C.

[0042] S205: When the rate of temperature rise of the first coolant exceeds a set rate threshold, the cooling components are controlled to improve the cooling efficiency of the battery cooling circuit.

[0043] If the rate of temperature rise of the first coolant exceeds the set rate threshold, it indicates that the temperature of the first coolant is about to rise to the safe operating temperature of the battery 101. In this case, the cooling efficiency of the first coolant in the battery cooling circuit is increased to prevent the temperature of the first coolant from reaching the set second temperature threshold or to prolong the time it takes for the temperature of the first coolant to reach the set second temperature threshold.

[0044] For example, the cooling assembly includes a heat exchange assembly 106 and a first coolant pump 103. When the rate of temperature increase of the first coolant is greater than a set rate threshold, the heat exchange assembly 106 is controlled to increase its operating power and the first coolant pump 103 is controlled to increase its rotation speed.

[0045] The heat exchange assembly 106 includes a heat exchanger 104 forming a loop and an electric compressor 105. The way to control the heat exchange assembly 106 to increase its operating power is to control the electric compressor 105 to increase its output power.

[0046] Furthermore, following S202, the method provided in this application embodiment further includes: controlling the cooling component to operate at full load (e.g., operating at 100% of its rated operating power) when the temperature of the first coolant is higher than or equal to a set second temperature threshold. This allows for the reduction of the coolant temperature in the battery cooling circuit with maximum cooling efficiency, preventing the temperature of the first coolant from reaching the set second temperature threshold or maximizing the time it takes for the temperature of the first coolant to reach the set second temperature threshold.

[0047] In addition, the method provided in the embodiments of this application may also include: Step A1: When the temperature of the first coolant is higher than or equal to the set second temperature threshold, the input terminal of the switching component 107 is connected to the first output terminal, and the input terminal of the switching component 107 is disconnected from the second output terminal, so that the main cooling path is connected to the first switchable branch 116 and forms a loop.

[0048] In this way, the coolant in the battery cooling circuit no longer exchanges heat with the gas in the engine intake branch, which allows the cooling components to quickly reduce the temperature of the first coolant to below the set second temperature threshold, ensuring the safety of the battery 101 operation.

[0049] Furthermore, after step A1, the method provided in this application embodiment further includes: Step A2: When the temperature of the first coolant drops to the set third temperature threshold, it indicates that the temperature environment of the battery 101 is relatively safe. Therefore, the input terminal of the switching component 107 is disconnected from the first output terminal, and the input terminal of the switching component 107 is connected to the second output terminal. The difference between the second temperature threshold and the third temperature threshold is greater than the set difference threshold (10 degrees Celsius). It can be understood that when the second temperature threshold is 45 degrees Celsius, the third temperature threshold is 35 degrees Celsius, so that the battery cooling circuit can exchange heat with the engine intake branch again.

[0050] Furthermore, the intake cooling circuit is equipped with a second coolant pump 111. After the input terminal of the control switching component 107 is disconnected from the first output terminal, and the input terminal of the control switching component 107 is connected to the second output terminal, the method provided in this embodiment further includes: controlling the second coolant pump 111 to shut down. This avoids heat exchange between the coolant in the intake cooling circuit and the coolant in the battery cooling circuit after the coolant has heated up, ensuring that the cooling efficiency of the coolant in the battery cooling circuit is not reduced.

[0051] After the input terminal of the control switching component 107 is connected to the first output terminal and the input terminal of the control switching component 107 is disconnected from the second output terminal, the method provided in this application embodiment further includes: if the second coolant pump 111 is in a closed state, controlling the second coolant pump 111 to turn on. Since the battery cooling circuit no longer exchanges heat with the engine intake branch, the coolant in the intake cooling circuit can resume heat exchange with the engine intake branch, providing basic heat dissipation for the gas in the engine intake branch.

[0052] In addition, as before Figure 1 As shown in the figure, this application embodiment also provides an engine thermal management system for a hybrid vehicle, including an on-board controller, a battery cooling circuit, an intake cooling circuit, a switching component 107, and an engine intake branch. One end of the switching component 107 is connected to the battery cooling circuit, and the other end of the switching component 107 is connected to the intake cooling circuit. Both the battery cooling circuit and the intake cooling circuit are in contact with the engine intake branch, and the temperature of the first coolant in the battery cooling circuit is lower than the temperature of the second coolant in the intake cooling circuit. A first temperature sensor 113 is provided at the outlet of the engine intake branch. The on-board controller is used to execute the method provided in the above embodiments of this application.

[0053] In addition, this application also provides a hybrid vehicle equipped with the engine thermal management system of the hybrid vehicle provided in the above embodiments of this application.

[0054] In addition, this application embodiment also provides a storage medium storing a computer program, which, when executed by the vehicle controller, causes the computer to perform the method provided in the above embodiments of this application.

[0055] In addition, this application also provides a computer program product, including a computer program that, when run, causes the vehicle controller to perform the method provided in the above embodiments of this application.

[0056] The above description does not provide detailed technical specifications regarding the structure of each layer. However, those skilled in the art should understand that layers and regions of desired shapes can be formed using various technical means. Furthermore, to form the same structure, those skilled in the art can also design methods that are not entirely identical to those described above. Additionally, although various embodiments have been described above, this does not mean that the measures in the various embodiments cannot be advantageously combined.

[0057] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0058] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A method of engine thermal management for a hybrid vehicle, characterized by, An on-board controller for an engine thermal management system in a hybrid vehicle, the engine thermal management system further including a battery cooling circuit, an intake air cooling circuit, and an engine intake branch, the battery cooling circuit including a main cooling path, a first switchable branch, a second switchable branch, and a switching component, the main cooling path being connected end-to-end with the first switchable branch, the second switchable branch being connected in parallel with the first switchable branch, the input terminal of the switching component being connected to the main cooling path, the first output terminal of the switching component being connected to the first switchable branch, the second output terminal of the switching component being connected to the second switchable branch, the first switchable branch being spaced apart from the engine intake branch, the second switchable branch being in contact with the engine intake branch, the temperature of the first coolant in the battery cooling circuit being lower than the temperature of the second coolant in the intake air cooling circuit, and the engine intake branch being equipped with a first temperature sensor, the method including: Receives the temperature of the gas entering the engine from the first temperature sensor; If the temperature of the gas entering the engine is determined to be greater than a set first temperature threshold, the input terminal of the switching component is disconnected from the first output terminal, and the input terminal of the switching component is connected to the second output terminal, so that the main cooling path is connected to the second switchable branch and forms a loop.

2. The method of claim 1, wherein, The main cooling path includes a second temperature sensor and a cooling assembly. After controlling the input terminal of the switching assembly to disconnect from the first output terminal and the input terminal of the switching assembly to connect to the second output terminal, the method further includes: Receive the temperature of the first coolant in the battery cooling circuit collected by the second temperature sensor; If the temperature of the first coolant is lower than a set second temperature threshold, determine the rate of temperature increase of the first coolant, wherein the second temperature threshold is less than the first temperature threshold; When the rate of temperature increase of the first coolant exceeds a set rate threshold, the cooling component is controlled to improve the cooling efficiency of the battery cooling circuit.

3. The method of claim 2, wherein, The cooling assembly includes a heat exchange component and a first coolant pump. Controlling the cooling assembly to improve the cooling efficiency of the battery cooling circuit includes: If the rate of temperature increase of the first coolant exceeds a set rate threshold, the heat exchange component is controlled to increase its operating power and the first coolant pump to increase its rotation speed.

4. The method according to claim 2, characterized in that, After the input terminal of the control switching component is disconnected from the first output terminal and the input terminal of the control switching component is connected to the second output terminal, the method further includes: When the temperature of the first coolant is higher than or equal to a set second temperature threshold, the cooling component is controlled to operate at full load.

5. The method according to claim 2, characterized in that, The method further includes: When the temperature of the first coolant is higher than or equal to a set second temperature threshold, the input terminal of the switching component is controlled to be connected to the first output terminal, and the input terminal of the switching component is controlled to be disconnected from the second output terminal, so that the main cooling path is connected to the first switchable branch and forms a loop.

6. The method according to claim 5, characterized in that, After the input terminal of the control switching component is connected to the first output terminal and the input terminal of the control switching component is disconnected from the second output terminal, the method further includes: When the temperature of the first coolant drops to a set third temperature threshold, the input terminal of the switching component is disconnected from the first output terminal, and the input terminal of the switching component is connected to the second output terminal, wherein the difference between the second temperature threshold and the third temperature threshold is greater than a set difference threshold.

7. The method according to claim 5, characterized in that, The intake cooling circuit is equipped with a second coolant pump. After the input terminal of the control switching component is disconnected from the first output terminal and the input terminal of the control switching component is connected to the second output terminal, the method further includes: controlling the second coolant pump to shut down. After the input terminal of the control switching component is connected to the first output terminal and the input terminal of the control switching component is disconnected from the second output terminal, the method further includes: If the second coolant pump is in the off state, then control the second coolant pump to turn on.

8. The method according to claim 1, characterized in that, The switching component is an electromagnetic three-way valve.

9. The method according to claim 1, characterized in that, The main cooling path includes a battery, a heat exchange assembly, and a first coolant pump connected via a first coolant pipe. The heat exchange assembly is connected to the outputs of the first switchable branch and the second switchable branch, respectively. The battery is connected to the output of the heat exchange assembly.

10. The method according to claim 9, characterized in that, The engine intake branch includes an air intake port connected by an air delivery pipe, a turbocharger, and an engine intake manifold, in sequence. The intake cooling circuit includes a water-cooled intercooler, a heat dissipation assembly, an expansion tank, and a second coolant pump, all connected in series based on the second coolant pipe.

11. The method according to claim 10, characterized in that, A portion of the air supply pipe located between the turbocharger and the engine intake manifold, a portion of the second switchable branch, and a portion of the second coolant pipe are all located inside the water-cooled intercooler, while the first switchable branch is located outside the water-cooled intercooler.

12. A thermal management system for an engine of a hybrid vehicle, characterized in that, The system includes an on-board controller, a battery cooling circuit, an intake cooling circuit, a switching assembly, and an engine intake branch. One end of the switching assembly is connected to the battery cooling circuit, and the other end is connected to the intake cooling circuit. Both the battery cooling circuit and the intake cooling circuit are in contact with the engine intake branch. The temperature of the first coolant in the battery cooling circuit is lower than the temperature of the second coolant in the intake cooling circuit. A first temperature sensor is provided at the outlet of the engine intake branch. The on-board controller is used to execute the method described in any one of claims 1-11.

13. A hybrid vehicle equipped with the engine thermal management system of the hybrid vehicle as described in claim 12.

14. A storage medium storing a computer program, characterized in that, When the computer program is executed by the vehicle controller, it causes the computer to perform the method as described in any one of claims 1 to 11.

15. A computer program product, comprising a computer program, characterized in that, When the computer program is run, it causes the vehicle controller to perform the method provided as claimed in any one of claims 1 to 11.

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