Cooling system of hybrid power system and vehicle

Abstract

The utility model relates to the technical field of vehicle cooling systems, and provides a cooling system of a hybrid power system and a vehicle, which comprise a cooling pipeline, a mechanical pump unit, an electronic pump unit and a second pipeline. One end of the second pipeline is communicated with oil inlets of the mechanical pump unit and the electronic pump unit, the other end of the second pipeline is communicated with a cooling liquid pool, and the cooling liquid pool is used for recycling a cooling medium in the cooling pipeline. Meanwhile, the mechanical pump unit and the electronic pump unit are adopted, the mechanical pump unit is driven by a gear and can be normally meshed with an input shaft of the engine, and cooling oil is continuously provided when the extended-range idling charging engine is started. The electronic pump unit can provide cooling oil according to needs when the driving motor works, and cooling oil supply under all working conditions is met. When the flow of the electronic pump unit is insufficient, the upper limit of oil supply can be improved by supplementing the flow through the mechanical pump unit, and the cost of the mechanical pump unit is lower than that of the electronic pump unit, so that the cost is lower compared with a double-electronic-pump-unit structure.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle cooling systems, in particular to a cooling system of a hybrid power system and a vehicle. Background Art

[0002] For hybrid vehicles with dual-motor configurations, there are drive motors and generators, both of which need to be cooled by cooling oil. The cooling oil is pumped to the drive motors and generators through an oil pump for heat exchange.

[0003] In the prior art, a single mechanical pump, a single electronic pump, or a dual electronic pump is generally used as an oil pump to pump cooling oil. However, a single mechanical pump can only be used in a PHEV hybrid transmission because a mechanical pump can only provide power through the power output end. When charging at idle speed in the range-extending structure, the engine does not drive the output end. At this time, the mechanical pump does not work, and the generator has no cooling oil to provide cooling. There is an upper limit to the oil supply capacity of a single electronic pump. The reason is that the electronic pump has a large displacement and poor low-temperature starting performance. The cost of a dual electronic pump is relatively high. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a cooling system and a vehicle of a hybrid power system, so as to take both cost and cooling performance into consideration.

[0005] In order to achieve the above-mentioned purpose and other related purposes, the utility model provides a cooling system of a hybrid power system, comprising:

[0006] Cooling pipelines are used to transport cooling media to exchange heat with vehicle components;

[0007] a mechanical pump unit, pumping cooling medium to the cooling pipeline through the first pipeline, the mechanical pump unit being driven by the engine;

[0008] an electronic pump unit, pumping cooling medium to the cooling pipeline through the first pipeline, the electronic pump unit being driven by an on-board power supply;

[0009] A second pipeline, one end of which is connected to the oil inlets of the mechanical pump unit and the electronic pump unit, and the other end of which is connected to a coolant pool, wherein the coolant pool is used to recover the cooling medium in the cooling pipeline and supply the cooling medium to the second pipeline.

[0010] In a specific embodiment of the present invention, the electronic pump unit and the mechanical pump unit are arranged in parallel and are connected to the same first pipeline and the same second pipeline.

[0011] In a specific embodiment of the present utility model, the first pipeline is connected to an oil cooler.

[0012] In a specific embodiment of the present invention, the second pipeline is connected to a suction filter.

[0013] In a specific embodiment of the present utility model, the cooling pipeline includes a first cooling oil circuit for cooling the generator and a second cooling oil circuit for cooling the drive motor.

[0014] In a specific embodiment of the utility model, the first cooling oil circuit is connected to the first pipeline through a first oil inlet pipe, the second cooling oil circuit is connected to the first pipeline through a second oil inlet pipe, and a stop valve is provided on the first oil inlet pipe.

[0015] In a specific embodiment of the present utility model, the suction filter is fixedly arranged on the housing of the mechanical pump unit and / or the electronic pump unit.

[0016] In a specific embodiment of the present invention, the housing of the mechanical pump unit and the housing of the electronic pump unit are an integrated structure.

[0017] In a specific embodiment of the present invention, the axes of the mechanical pump unit and the electronic pump unit are parallel to the axis of the engine.

[0018] In a specific embodiment of the present invention, the mechanical pump unit is connected to the engine crankshaft via a gear.

[0019] In a specific embodiment of the present invention, the mechanical pump unit and the electronic pump unit are arranged at one end of the engine facing the generator.

[0020] The utility model also provides a vehicle, comprising a cooling system of the hybrid power system as described above.

[0021] The utility model proposes a cooling system and vehicle of a hybrid power system, which simultaneously adopts a mechanical pump unit and an electronic pump unit. The mechanical pump unit adopts a gear drive and can be constantly meshed with the engine input shaft, and continuously provides cooling oil when the extended range idle charging engine is started. The electronic pump unit can provide cooling oil on demand when the drive motor is working, and meet the cooling oil supply under all working conditions. When the flow of the electronic pump unit is insufficient, the flow can be supplemented by the mechanical pump unit to increase the upper limit of the oil supply. The cost of the mechanical pump unit is lower than that of the electronic pump unit, so the cost is lower than that of the dual electronic pump unit structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 A pipe connection diagram of a cooling system of a hybrid power system in one embodiment of the utility model;

[0024] Figure 2 It is a schematic diagram of the three-dimensional structure of a cooling system of a hybrid power system in one embodiment of the utility model;

[0025] Figure 3 It is a schematic diagram of the installation of a cooling system of a hybrid power system in one embodiment of the utility model;

[0026] Figure 4 It is a schematic diagram of the interior of a cooling system of a hybrid power system in one embodiment of the present invention;

[0027] Figure 5 A cross-sectional view of a cooling system of a hybrid power system in one embodiment of the present invention;

[0028] Figure 6 It is a cross-sectional view of another position of the cooling system of the hybrid power system in one embodiment of the present invention.

[0029] Explanation of the reference numerals: 1. engine; 10. cooling pipeline; 11. first cooling oil circuit; 12. second cooling oil circuit; 13. first oil inlet pipe; 14. second oil inlet pipe; 20. mechanical pump; 30. electronic pump; 40. first pipeline; 41. oil cooler; 42. liquid outlet; 50. second pipeline; 51. suction filter; 60. safety valve; 70. coolant tank. DETAILED DESCRIPTION

[0030] The following describes the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0031] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the illustrations only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. During actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0032] The drive motor and generator are the core components of the hybrid system. They generate a certain amount of heat during operation and need to be cooled to ensure stable performance and long life. Cooling oil is used as a heat transfer medium to absorb the generated heat by flowing around the motor and generator. This helps keep the temperature of these key components within a safe range. The oil pump is responsible for drawing the cooling oil from the reservoir or tank and sending it to the cooling system of the drive motor and generator. This ensures that the cooling oil can circulate throughout the system.

[0033] The entire cooling system is designed to ensure that the drive motor and generator can maintain the appropriate temperature when working to prevent overheating damage and ensure the efficiency of the system. In hybrid vehicles, such a cooling system is essential to improve vehicle performance and reliability. The various components work in harmony to provide optimal performance under various driving conditions.

[0034] Currently, conventional single mechanical pumps, single electronic pumps and dual electronic pumps all have their own advantages and disadvantages, so a cooling system for a hybrid power system that takes into account both large flow and cost is needed.

[0035] like Figure 1 As shown, the utility model provides a cooling system of a hybrid power system, including a cooling pipeline 10 , a mechanical pump unit 20 , an electronic pump unit 30 , a first pipeline 40 and a second pipeline 50 .

[0036] The cooling line 10 is used to transport cooling medium to exchange heat with vehicle components. Vehicle components refer to heat-generating components such as vehicle batteries, generators, and drive motors. The cooling line 10 is a network of pipes in the entire system that is responsible for delivering coolant (which can be cooling oil or other cooling medium). These pipes connect various key components to ensure that the coolant can flow throughout the system.

[0037] The mechanical pump unit 20 pumps the cooling medium to the cooling line 10 through the first line 40, and the mechanical pump unit 20 is driven by the engine 1. Figure 1 As shown, the liquid outlet 42 of the first pipeline 40 is connected to the liquid inlet end of the cooling pipeline 10, and the mechanical pump unit 20 is connected to the engine 1 through a mechanical transmission method (such as gears). When the engine 1 is running, the mechanical pump unit 20 is activated and is responsible for extracting the cooling medium from the reservoir or part of the cooling medium of the cooling system, and then pumping it into the cooling pipeline 10 through the first pipeline 40. The mechanical pump unit 20 is directly driven by the engine 1, so it can provide a continuous flow of cooling medium when the engine 1 is running. During extended range idle charging, when the engine 1 is started, the mechanical pump unit 20 continuously supplies cooling oil. This ensures that the cooling system can quickly build up pressure and flow in the early stage of engine 1 operation to effectively cool vehicle components.

[0038] The electronic pump unit 30 pumps the cooling medium to the cooling line 10 through the first pipeline 40, and the electronic pump unit 30 is driven by the vehicle power supply. The electronic pump unit 30 is a pump controlled and driven by an electronic system, which can flexibly provide cooling medium according to system requirements. Through the first pipeline 40, the electronic pump unit 30 pumps the cooling medium into the cooling line 10 to ensure proper cooling of each component. The advantage of the electronic pump unit 30 lies in its flexibility. The electronic pump unit 30 can provide cooling oil on demand when the drive motor is working. This flexibility allows the system to adjust the supply of cooling oil according to the current working conditions, improving the efficiency and energy efficiency of the system. When the cooling medium flow of the electronic pump unit 30 is insufficient, the system can supplement the flow through the mechanical pump unit 20 to increase the overall cooling oil supply upper limit. This strategy ensures that the system can still meet the cooling requirements under high working conditions. Since the cost of the mechanical pump unit 20 is relatively low, using the mechanical pump unit 20 as a backup means can reduce system costs while providing reliability.

[0039] One end of the second pipeline 50 is connected to the oil inlet of the mechanical pump unit 20 and the electronic pump unit 30, and the other end of the second pipeline 50 is connected to the coolant pool 70, and the coolant pool 70 is used to recover the cooling medium in the cooling pipeline 10 and supply the cooling medium to the second pipeline 50. Through the arrangement of the second pipeline 50, the coordination of the cooling medium supply by the mechanical pump unit 20 and the electronic pump unit 30 is achieved. Such a pipeline layout helps to optimize the performance and efficiency of the cooling system, ensuring that the cooling medium can effectively flow to and dissipate heat to maintain the appropriate temperature of key components in the system.

[0040] like Figure 1 As shown, the electronic pump unit 30 is arranged in parallel with the mechanical pump unit 20 and is connected to the same first pipeline 40 and the same second pipeline 50. Since the electronic pump unit 30 and the mechanical pump unit 20 are in parallel, when the engine and the electronic pump unit are working at the same time, the system has redundancy, and when one pump fails, the other pump can still provide cooling medium. The electronic pump unit 30 and the mechanical pump unit 20 can operate simultaneously according to system requirements to meet the cooling requirements under different working conditions. For example, the electronic pump unit 30 and the mechanical pump unit 20 can work simultaneously to provide a larger cooling flow. Sharing the same first pipeline 40 and the second pipeline 50 helps to simplify the design and layout of the system.

[0041] like Figure 1As shown, the first pipeline 40 is connected to an oil cooler 41. The oil cooler 41 is similar to the evaporator of the air conditioning system. The main function of the oil cooler 41 is to reduce the temperature of the lubricating oil or cooling oil flowing through it. The purpose of this is to ensure that the oil works within an appropriate temperature range to maintain the performance and reliability of the system. The oil cooler 41 can be an air-cooled oil cooler or a water-cooled oil cooler. The air-cooled oil cooler reduces the temperature of the oil by directly exchanging heat between the cooling medium (usually air) and the oil. The water-cooled oil cooler adjusts the oil temperature by circulating cooling water. The oil cooler 41 is usually composed of a series of cooling pipes and heat dissipation surfaces, and can also be a plate heat exchanger formed by multiple groups of cooling plates. The high-temperature cooling medium flows through these oil coolers, contacts the heat dissipation surface, and dissipates heat to the surrounding environment or circulating cooling water by conduction and convection. The use of the oil cooler 41 can maintain the viscosity and lubrication properties of the oil and prevent oil oxidation and degradation caused by overheating. This helps to extend the life of the mechanical system and improve work efficiency.

[0042] like Figure 1 As shown, the second pipeline 50 is connected to a suction filter 51. The main function of the suction filter 51 is to remove solid particles, dust, particles and other impurities from the liquid flowing through it. This can prevent these particles from entering the mechanical system, reduce wear, improve efficiency, and protect system components from damage. The suction filter 51 is usually composed of one or more filter elements, which can be made of different materials such as paper, fiberglass, metal mesh, etc.

[0043] like Figure 1 As shown, the cooling circuit 10 includes a first cooling oil circuit 11 for cooling the generator and a second cooling oil circuit 12 for cooling the drive motor. The generator will generate a certain amount of heat during operation, and a cooling system is required to maintain its normal operating temperature. The first cooling oil circuit 11 is responsible for guiding the cooling medium (usually cooling oil or other cooling liquids) to the generator to absorb the heat generated by the generator. This helps prevent the generator from overheating and improves its efficiency and life. The drive motor also generates heat during operation, and a cooling system is required to ensure that its operating temperature is within an acceptable range. The second cooling oil circuit 12 is responsible for transmitting the cooling medium to the drive motor to reduce its temperature and improve the performance and reliability of the drive motor.

[0044] like Figure 1As shown, the first cooling oil circuit 11 is connected to the first pipeline 40 through the first oil inlet pipe 13, and the second cooling oil circuit 12 is connected to the first pipeline 40 through the second oil inlet pipe 14, and a stop valve 70 is provided on the first oil inlet pipe 13. With the addition of the stop valve 70, the direction of the flow can be selected according to the specific cooling requirements. By opening or closing the stop valve 70, it can be determined whether the cooling medium flows to the drive motor or the generator, or both the generator and the drive motor at the same time. This design allows the cooling requirements to be selected according to different working conditions. For example, if only the drive motor needs to be cooled, the cooling passage of the generator can be closed, thereby optimizing the efficiency of the cooling system. By selectively cooling the generator, the flow demand of the liquid in the entire system can be reduced, thereby reducing the displacement demand of the pump. A safety valve 60 can also be provided in the system pipeline.

[0045] like Figure 2 As shown, the suction filter 51 is fixedly arranged on the housing of the mechanical pump unit 20 and / or the electronic pump unit 30. The direct installation of the suction filter 51 on the housing of the pump simplifies the maintenance process. If the suction filter 51 needs to be replaced or cleaned, it can be performed directly on the outside of the pump without large-scale disassembly of the pump. The function of the suction filter 51 is to prevent particulate matter and impurities from entering the pump system. By directly installing the suction filter 51 on the housing of the pump, the pump can be effectively protected from the influence of impurities and the life of the pump can be extended.

[0046] like Figure 2 As shown, the housing of the mechanical pump unit 20 and the housing of the electronic pump unit 30 are an integrated structure. The housings of the mechanical pump unit 20 and the electronic pump unit 30 of the integrated structure combine the components of the two pumps into a single component. The advantage of doing so is that the design of the entire system is simplified and the complexity of assembly and installation is reduced. Combining the housings of the mechanical pump unit 20 and the electronic pump unit 30 into one can save space. Compared with independent pump installations, the integrated structure can reduce the overall footprint of the system. The integrated structure of the mechanical pump unit 20 and the electronic pump unit 30 improves the integration of the system. The integrated structure reduces the pipe connection between the mechanical pump unit 20 and the electronic pump unit 30, simplifying the pipeline layout. This helps to reduce the length of the pipeline in the pump system, thereby reducing pressure loss and resistance to liquid flow.

[0047] like Figure 2 , 5 As shown in Figures 6 and 7, the axes of the mechanical pump unit 20 and the electronic pump unit 30 are parallel to the axis of the engine 1. Since the axes are parallel, the design of the transmission device becomes simpler. With respect to the transmission system connected to the engine 1, the parallel axes can reduce the complexity of the transmission elements. The parallel axes help to improve the overall integration between the mechanical pump unit 20, the electronic pump unit 30 and the engine 1.

[0048] like Figure 5 , 6 As shown, the mechanical pump unit 20 is connected to the output shaft of the engine 1 through a gear. That is to say, the mechanical pump unit 20 must be started as long as the engine 1 is started. Through gear transmission, the rotational motion of the output shaft of the engine 1 can be converted into the rotational force required by the mechanical pump unit 20. This enables the mechanical pump unit 20 to operate normally and provide the required liquid flow or pressure as required.

[0049] like Figure 3 , 4 As shown, the mechanical pump unit 20 and the electronic pump unit 30 are arranged at one end of the engine 1 facing the generator. Since the mechanical pump unit 20 and the electronic pump unit 30 need to pump oil to cool the generator, such an arrangement can shorten the pipeline as much as possible to reduce costs, reduce pressure loss and resistance to liquid flow. At the same time, the crankshaft of the engine 1 needs to be connected to the input end of the generator, usually using an axial connection. The space around this connection end is effectively utilized, and the mechanical pump unit 20 and the electronic pump unit 30 are placed in this position to improve the integration of the system, thereby saving space.

[0050] The utility model also provides a vehicle, comprising a cooling system of the hybrid power system as described above.

[0051] In summary, the utility model proposes a cooling system and vehicle of a hybrid power system, which simultaneously adopts a mechanical pump unit 20 and an electronic pump unit 30. The mechanical pump unit 20 is gear-driven and can be constantly meshed with the input shaft of the engine 1, and continuously provides cooling oil when the extended-range idle charging engine 1 is started. The electronic pump unit 30 can provide cooling oil on demand when the drive motor is working, and meet the cooling oil supply under all working conditions. When the flow of the electronic pump unit 30 is insufficient, the flow can be supplemented by the mechanical pump unit 20 to increase the upper limit of the oil supply. The cost of the mechanical pump unit 20 is lower than that of the electronic pump unit 30, so it is lower in cost compared to the dual electronic pump structure.

[0052] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

[0053] In the description herein, many specific details, such as examples of components and / or methods, are provided to provide a complete understanding of the embodiments of the present invention. However, those skilled in the art will recognize that embodiments of the present invention may be practiced without one or more specific details or by other devices, systems, components, methods, components, materials, parts, etc. In other cases, well-known structures, materials, or operations are not specifically shown or described in detail to avoid obscuring aspects of the embodiments of the present invention.

[0054] References throughout the specification to "one embodiment," "an embodiment," or "a specific embodiment" mean that a particular feature, structure, or characteristic described in conjunction with the embodiment is included in at least one embodiment of the present invention, and not necessarily in all embodiments. Thus, various appearances of the phrases "in one embodiment," "in an embodiment," or "in a specific embodiment" in different places throughout the specification do not necessarily refer to the same embodiment. In addition, the particular features, structures, or characteristics of any specific embodiment of the present invention may be combined with one or more other embodiments in any suitable manner. It should be understood that other variations and modifications of the embodiments of the present invention described and illustrated herein may be based on the teachings herein and will be considered part of the spirit and scope of the present invention.

[0055] It should also be understood that one or more of the elements shown in the figures may also be implemented in a more separate or more integrated manner, or even removed because they are inoperable in certain circumstances or provided because they may be useful depending on the application.

[0056] In addition, unless otherwise explicitly indicated, any marking arrows in the drawings should be regarded as exemplary only and not limiting. In addition, unless otherwise indicated, the term "or" used herein is generally intended to mean "and / or". In the case where the term is not clear because it is anticipated that the ability to separate or combine is provided, the combination of components or steps will also be regarded as indicated.

[0057] As used in the description herein and throughout the claims that follow, "a", "an", and "the" include plural references unless otherwise indicated. Likewise, as used in the description herein and throughout the claims that follow, the meaning of "in" includes "in" and "on" unless otherwise indicated.

[0058] The above description of the illustrated embodiments of the present invention (including that described in the Abstract of the Specification) is not intended to be an exhaustive list or to limit the present invention to the precise form disclosed herein. Although specific embodiments of the present invention and examples of the present invention are described herein for illustrative purposes only, various equivalent modifications are possible within the spirit and scope of the present invention as will be recognized and understood by those skilled in the art. As noted, these modifications may be made to the present invention in accordance with the above description of the embodiments described in the present invention, and these modifications will be within the spirit and scope of the present invention.

[0059] Systems and methods have been generally described herein as details that are helpful for understanding the present invention. In addition, various specific details have been given to provide an overall understanding of the embodiments of the present invention. However, those skilled in the relevant art will recognize that the embodiments of the present invention can be practiced without one or more specific details, or practiced using other devices, systems, accessories, methods, components, materials, parts, etc. In other cases, well-known structures, materials, and / or operations are not specifically shown or described in detail to avoid confusion with various aspects of the embodiments of the present invention.

[0060] Thus, although the present invention has been described herein with reference to specific embodiments thereof, freedom of modification, various changes and substitutions are also within the above disclosure, and it should be understood that in some cases, some features of the present invention will be adopted without corresponding use of other features without departing from the scope and spirit of the proposed utility model. Therefore, many modifications can be made to adapt specific environments or materials to the essential scope and spirit of the present utility model. The present utility model is not intended to be limited to the specific terms used in the claims below and / or the specific embodiments disclosed as the best mode for carrying out the present utility model, but the present utility model will include any and all embodiments and equivalents falling within the scope of the appended claims. Therefore, the scope of the present utility model will be determined solely by the appended claims.

Claims

1. A cooling system for a hybrid power system, characterized in that: include: Cooling pipelines are used to transport cooling media to exchange heat with vehicle components; a mechanical pump unit, pumping cooling medium to the cooling pipeline through the first pipeline, the mechanical pump unit being driven by the engine; an electronic pump unit, pumping cooling medium to the cooling pipeline through the first pipeline, the electronic pump unit being driven by an on-board power supply; A second pipeline, one end of which is connected to the oil inlets of the mechanical pump unit and the electronic pump unit, and the other end of which is connected to a coolant pool, wherein the coolant pool is used to recover the cooling medium in the cooling pipeline and supply the cooling medium to the second pipeline.

2. The cooling system of the hybrid power system according to claim 1, characterized in that: The electronic pump unit is arranged in parallel with the mechanical pump unit and is in communication with the same first pipeline and the same second pipeline.

3. The cooling system of the hybrid power system according to claim 1, characterized in that: The first pipeline is connected with an oil cooler.

4. The cooling system of the hybrid power system according to claim 1, characterized in that: The second pipeline is connected with a suction filter.

5. The cooling system of the hybrid power system according to claim 1, characterized in that: The cooling circuit includes a first cooling oil circuit for cooling the generator and a second cooling oil circuit for cooling the drive motor.

6. The cooling system of the hybrid power system according to claim 5, characterized in that: The first cooling oil circuit is connected to the first pipeline through a first oil inlet pipe, and the second cooling oil circuit is connected to the first pipeline through a second oil inlet pipe. A stop valve is provided on the first oil inlet pipe.

7. The cooling system of the hybrid power system according to claim 4, characterized in that: The suction filter is fixedly arranged on a housing of the mechanical pump unit and / or the electronic pump unit.

8. The cooling system of the hybrid power system according to claim 1, characterized in that: The housing of the mechanical pump unit and the housing of the electronic pump unit are an integrated structure.

9. The cooling system of the hybrid power system according to claim 1, characterized in that: The axes of the mechanical pump unit and the electronic pump unit are parallel to the axis of the engine.

10. The cooling system of the hybrid power system according to claim 9, characterized in that: The mechanical pump unit is connected to the engine crankshaft via gears.

11. The cooling system of the hybrid power system according to claim 10, characterized in that: The mechanical pump unit and the electronic pump unit are arranged at one end of the engine facing the generator.

12. A vehicle, characterized in that: A cooling system comprising a hybrid power system as claimed in any one of claims 1 to 11.

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