Hybrid system on / off valve control method, device, electric vehicle and storage medium

Abstract

This application discloses a method, apparatus, electric vehicle, and storage medium for controlling a switching valve in a hybrid system. The method includes: acquiring real-time vehicle mode signals, main hydraulic pressure, and gear speed; controlling the state of a switching valve in the vehicle's hybrid system based on the vehicle mode signals, main hydraulic pressure, and gear speed; and switching the state of a high-low pressure decoupling valve in the hybrid system based on the state of the switching valve, so that the electric pump in the hybrid system switches in the high-low pressure circuit as the state of the high-low pressure decoupling valve switches. The embodiments of this application can not only control the state of the switching valve in the vehicle's hybrid system from multiple dimensions but also ensure timely response to vehicle needs and reduce vehicle energy consumption.

Description

Technical Field

[0001] This application relates to the field of automotive powertrain technology, specifically to a method and device for controlling the switching valves of a hybrid system, an electric vehicle, a computer-readable storage medium, and a computer program product. Background Technology

[0002] In recent years, the emergence of electric motor hybrid technology has opened up new avenues for achieving complete power matching between the internal combustion engine and the drive wheels. Among the numerous powertrain design schemes, the most representative is the series-parallel hybrid system. In this system, the switching between pure electric, range-extended, and direct-drive modes is achieved through the disengagement and engagement of the clutch. To establish the high main oil pressure required for clutch engagement, this system employs a combination of an electronic pump and a mechanical pump for oil supply. The mechanical pump supplies oil to the actuators at high pressure. When the mechanical pump's flow is insufficient at low speeds, the electronic pump is coupled into the high-pressure circuit by controlling the switching valve in the hybrid system, providing rapid-response auxiliary oil supply and cooling lubrication. When the mechanical pump's speed is high and the flow is sufficient, the switching valve is controlled to reverse the high- and low-pressure decoupling valves, connecting the electronic pump into the low-pressure circuit (decoupling) to reduce the electronic pump's back pressure and thus reduce energy consumption.

[0003] However, in a current series-parallel hybrid system, the control variable of the switching valve used to switch between high and low circuits is single, and it cannot respond to system demands in a timely manner when switching modes, resulting in increased vehicle energy consumption. Summary of the Invention

[0004] To address the aforementioned technical problems, embodiments of this application provide a method and apparatus for controlling the switching valve of a hybrid system, an electric vehicle, a computer-readable storage medium, and a computer program product.

[0005] According to one aspect of the embodiments of this application, a method for controlling the switching valves of a hybrid system is provided, for use in a hybrid system having a series-parallel configuration, comprising: acquiring real-time vehicle mode signals, main oil pressure, and gear speed; controlling the state of the switching valves in the hybrid system of the vehicle according to the vehicle mode signals, main oil pressure, and gear speed; and switching the state of the high-low pressure decoupling valves of the hybrid system according to the state of the switching valves, so that the electric pump in the hybrid system switches in the high-low pressure circuit as the state of the high-low pressure decoupling valves switches.

[0006] According to one aspect of the embodiments of this application, controlling the state of the switching valve in the hybrid system based on the vehicle's mode signal, main hydraulic pressure, and gear speed includes: if the vehicle's mode signal indicates that the vehicle is in a transition mode from pure electric mode to range-extending mode, and the vehicle's main hydraulic pressure reaches a first preset main hydraulic pressure threshold, then matching the vehicle's gear speed with a preset speed threshold; if the vehicle's gear speed is less than the first preset speed threshold, then controlling the switching valve to be in a coupled state; if the vehicle's gear speed is greater than a second preset speed threshold, then controlling the switching valve to be in a decoupled state; if the vehicle's gear speed is within the range of the first preset speed threshold to the second preset threshold, then controlling the switching valve to maintain its current state; wherein, the first preset speed threshold is less than the second preset speed threshold.

[0007] According to one aspect of the embodiments of this application, controlling the state of the switching valve in the hybrid system based on the vehicle's mode signal, main oil pressure, and gear speed includes: if the vehicle's mode signal indicates that the vehicle is in range-extending mode, and the vehicle's main oil pressure reaches a first preset main oil pressure threshold, then matching the vehicle's gear speed with a preset speed threshold; if the vehicle's gear speed is less than a third preset speed threshold, then controlling the switching valve to be in a coupled state; if the vehicle's gear speed is greater than a fourth preset speed threshold, then controlling the switching valve to be in a decoupled state; if the vehicle's gear speed is within the range of the third preset speed threshold to the fourth preset speed threshold, then controlling the switching valve to maintain its current state; wherein the third preset speed threshold is less than the fourth preset speed threshold.

[0008] According to one aspect of the embodiments of this application, controlling the state of the switching valve in the hybrid system based on the vehicle's mode signal, main hydraulic pressure, and gear speed includes: if the vehicle's mode signal indicates that the vehicle is in a transition mode switching from range-extending mode to hybrid mode or is in hybrid mode, and the vehicle's main hydraulic pressure reaches a second preset main hydraulic pressure threshold, then matching the vehicle's gear speed with a preset speed threshold; if the vehicle's gear speed is less than or equal to a fifth preset speed threshold, then controlling the switching valve to be in a coupled state; if the vehicle's gear speed is greater than the fifth preset speed threshold, then controlling the switching valve to be in a decoupled state.

[0009] According to one aspect of the present application, the step of controlling the state of the switching valve in the hybrid system based on the vehicle's mode signal, main oil pressure, and gear speed further includes: if the vehicle's mode signal indicates that the vehicle is in a transition mode from hybrid mode to range-extending mode, and the vehicle's main oil pressure reaches the second preset main oil pressure threshold, then controlling the switching valve to lock the previous mode state.

[0010] According to one aspect of the present application, controlling the state of the switching valve in the hybrid system based on the vehicle's mode signal, main oil pressure, and gear speed includes: if the vehicle's mode signal indicates that the vehicle is in a transition mode from range-extended mode to pure electric mode, and the vehicle's main oil pressure reaches the third preset main oil pressure threshold, then controlling the switching valve to be in a coupled state.

[0011] According to one aspect of the embodiments of this application, controlling the state of the switching valve in the hybrid system based on the vehicle's mode signal, main oil pressure, and gear speed includes: if the vehicle's mode signal indicates that the vehicle is in pure electric mode, and the vehicle's main oil pressure reaches a third preset main oil pressure threshold, then acquiring the real-time oil temperature of the vehicle's hybrid system and matching the real-time oil temperature with the preset oil temperature threshold; if the real-time oil temperature matches the preset oil temperature threshold, then controlling the switching valve to maintain a coupled state.

[0012] According to one aspect of the embodiments of this application, a switching valve control device for a hybrid system is provided, comprising: an acquisition module for acquiring real-time vehicle mode signals, main oil pressure, and gear speed; a switching valve control module for controlling the state of the switching valve in the hybrid system of the vehicle according to the vehicle mode signals, main oil pressure, and gear speed; and a high-low pressure decoupling valve switching module for switching the state of the high-low pressure decoupling valve of the hybrid system according to the state of the switching valve, so that the electric pump in the hybrid system switches in the high-low pressure circuit as the state of the high-low pressure decoupling valve switches.

[0013] According to one aspect of the present application, an electric vehicle is provided, the electric vehicle having the on / off valve control device of the hybrid system described above.

[0014] According to one aspect of the present application, a computer-readable storage medium is provided, on which computer-readable instructions are stored, which, when executed by a computer processor, cause the computer to perform the hybrid system switching valve control method as described above.

[0015] According to one aspect of the embodiments of this application, a computer program product is also provided, including a computer program that, when executed by a processor, implements the steps in the hybrid system switching valve control method as described above.

[0016] In the technical solution provided by the embodiments of this application, by acquiring the vehicle's real-time mode signal, main oil pressure, and gear speed, multiple variables in multiple dimensions are collected during vehicle operation. The state of the switching valve in the vehicle hybrid system is controlled according to the vehicle's mode signal, main oil pressure, and gear speed. By controlling the switching valve in the vehicle hybrid system through multiple variable dimensions, it is ensured that the vehicle's needs can be responded to in a timely manner when the mode is switched. Furthermore, the state of the high and low decoupling valves of the hybrid system is switched according to the state of the switching valves. This reduces the load and energy consumption of the electronic pump and does not affect the main oil pressure due to frequent switching.

[0017] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. In the drawings:

[0019] Figure 1 This is a circuit diagram of a series-parallel hybrid system illustrated in an exemplary embodiment of this application;

[0020] Figure 2 This is a schematic diagram illustrating the implementation environment of the on / off valve control of a hybrid system, as shown in an exemplary embodiment of this application.

[0021] Figure 3 This is a flowchart illustrating an exemplary embodiment of the present application of a method for controlling the switching valve of a hybrid system;

[0022] Figure 4 This is a flowchart illustrating an exemplary embodiment of a method for controlling the switching valve of a hybrid system;

[0023] Figure 5 This is a flowchart illustrating an exemplary embodiment of a method for controlling the switching valve of a hybrid system;

[0024] Figure 6 This is a flowchart illustrating an exemplary embodiment of a method for controlling the switching valve of a hybrid system;

[0025] Figure 7 This is a flowchart illustrating an exemplary embodiment of a method for controlling the switching valve of a hybrid system;

[0026] Figure 8 This is a simplified flowchart illustrating the on / off valve control of a hybrid system in an exemplary application scenario.

[0027] Figure 9 This is a block diagram illustrating a switching valve control device for a hybrid system, as shown in an exemplary embodiment of this application.

[0028] Figure 10 A schematic diagram of the structure of a computer system suitable for implementing the electronic device of the present application is shown. Detailed Implementation

[0029] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0030] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities can be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.

[0031] The flowcharts shown in the accompanying drawings are merely illustrative and do not necessarily include all content and operations / steps, nor do they necessarily have to be performed in the described order. For example, some operations / steps can be broken down, while others can be combined or partially combined; therefore, the actual execution order may change depending on the specific circumstances.

[0032] In this application, "multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0033] It should be noted that in hybrid vehicles, as long as the engine and electric motor work together to provide power to the vehicle, good vehicle power and resource conservation depend not only on the engine and electric motor themselves, but also on a good power matching relationship.

[0034] Figure 1 This is an exemplary embodiment illustrating a series-parallel hybrid power system, such as... Figure 1As shown, the existing series-parallel hybrid power system is connected to the transmission controller and includes a mechanical pump 1, an electric pump 2, a high-low pressure decoupling valve 3, a high-pressure control oil circuit, and a low-pressure cooling and lubrication oil circuit. The mechanical pump 1 is connected to the high-pressure control oil circuit. The electric pump 2 is connected to either the high-pressure control oil circuit or the low-pressure cooling and lubrication oil circuit through the high-low pressure decoupling valve 3. The high-pressure control oil circuit includes a main pressure regulating pilot solenoid valve and a main pressure regulating mechanical valve 5. The main pressure regulating pilot solenoid valve is connected to the transmission controller and is used to regulate the main oil pressure according to the instructions of the transmission controller. The main pressure regulating mechanical valve is used to guide the flow output from the electric pump 2 and / or the mechanical pump 1 connected to the high-pressure control oil circuit to the low-pressure cooling and lubrication oil circuit according to the control of the main pressure regulating pilot solenoid valve. The high-pressure control oil circuit also includes a pilot switching valve 4. The pilot switching valve 4 is connected to the transmission controller and the high-low pressure decoupling valve 3 and is used to control the working state of the high-low pressure decoupling valve 3 according to the instructions of the transmission controller. Therefore, this application responds to the vehicle's needs under different mode signals, main oil pressure, and gear speed by controlling the pilot switch valve 4.

[0035] Figure 2 This is a schematic diagram illustrating an implementation environment for controlling the switching valve of a hybrid system, as shown in an exemplary embodiment of this application. Figure 2 As shown, in a hybrid system with a series-parallel configuration, the vehicle's real-time mode signal, main oil pressure, and gear speed are acquired by the onboard intelligent terminal 210 and sent to the server 220 during operation. The server 220 then generates control commands based on these parameters to switch the states of the switching valves in the hybrid system. By controlling the state of these valves, the server switches the state of the high-low pressure decoupling valves in the hybrid system, causing the electric pump in the hybrid system to switch in tandem with the state of the decoupling valves. This achieves timely switching between high-low pressure decoupling and coupling based on vehicle mode changes, reducing vehicle energy consumption.

[0036] The server 220 can be a standalone physical server, a server cluster or distributed system composed of multiple physical servers, or a cloud server providing basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communication, middleware services, domain name services, security services, CDN (Content Delivery Network), and big data and artificial intelligence platforms. No restrictions are placed on this. The in-vehicle intelligent terminal 210 can communicate with the server 220 via wireless networks such as 3G (third-generation mobile information technology), 4G (fourth-generation mobile information technology), and 5G (fifth-generation mobile information technology). No restrictions are placed on this as well.

[0037] Please see Figure 3 , Figure 3 This is a flowchart illustrating an exemplary embodiment of a hybrid system's on / off valve control method. This method can be applied to... Figure 2 The implementation environment shown is specifically executed by the in-vehicle intelligent terminal 210 in this embodiment. It should be understood that this method can also be applied to other exemplary implementation environments and specifically executed by devices in other implementation environments. This embodiment does not limit the implementation environment to which the method is applicable.

[0038] like Figure 3 As shown, in an exemplary embodiment, the on / off valve control method for a hybrid system is used in a hybrid system with a series-parallel configuration. This control method includes at least steps S310 to S330, which are detailed below:

[0039] Step S310: Obtain the vehicle's real-time mode signal, main oil pressure, and gear speed.

[0040] First, it should be noted that, as Figure 1 As shown, the main oil pressure specifically refers to the oil pressure of the main oil circuit in the diagram, that is, the pressure of the oil circuit where the main pressure sensor is located in the diagram; the real-time mode signal of the vehicle can be obtained by the vehicle controller through the vehicle communication bus to obtain the real-time mode status of the vehicle and the real-time gear speed of the vehicle.

[0041] Step S320: Control the state of the switching valve in the vehicle's hybrid system based on the vehicle's mode signal, main oil pressure, and gear speed.

[0042] By acquiring real-time vehicle mode signals, hybrid system main oil pressure, and vehicle gear speed, and based on the principle of using both electronic and mechanical pumps to supply oil in a series-parallel hybrid system to establish the main oil pressure required for clutch engagement, the system employs this principle. When the mechanical pump speed is low and flow is insufficient, the control valve connects the electronic pump to the high-pressure circuit, providing rapid response to assist the mechanical pump in oil supply and cooling / lubrication. When the mechanical pump speed is high and flow is sufficient, the control valve reverses the high-low pressure decoupling valve, connecting the electronic pump to the low-pressure circuit. The state of the pilot switching valve in the vehicle's hybrid system is controlled based on the vehicle's real-time mode signals, main oil pressure, and gear speed.

[0043] Step S330: Switch the state of the high and low pressure decoupling valve of the hybrid system according to the state of the switching valve, so that the electric pump in the hybrid system switches in the high and low pressure circuit as the state of the high and low pressure decoupling valve switches.

[0044] like Figure 1 As shown, in this embodiment, the high and low pressure decoupling valve 3 is normally in a coupled state, as... Figure 1As shown, the high-low pressure decoupling valve 3 is in the right-hand working state. When the pilot switch valve 4 is energized, it controls the high-low pressure decoupling valve 3 to be in the decoupling state, i.e., the high-low pressure decoupling valve 3 is in the left-hand working state. When the pilot switch valve 4 is de-energized, it controls the high-low pressure decoupling valve 3 to be in the coupling state, i.e., the high-low pressure decoupling valve 3 is in the right-hand working state. The pilot switch valve 4 can switch the working state of the high-low pressure decoupling valve 3 in real time according to the instructions of the vehicle controller. In this embodiment, the pilot switch valve 4 is controlled to respond to the vehicle's needs under different mode signals, main oil pressure, and gear speed.

[0045] In this embodiment, by collecting real-time vehicle mode signals, main oil pressure, and gear speed, the state of the switching valves in the vehicle's hybrid system is controlled from multiple dimensions of vehicle status. The state of the high and low decoupling valves in the hybrid system is switched according to the state of the switching valves, so as to realize timely control of the switching of high and low pressure decoupling and coupling according to the mode switching, thereby reducing vehicle energy consumption.

[0046] Based on the above embodiments, please refer to Figure 4 In one exemplary embodiment provided in this application, the implementation process of step S320 may further include steps S410 to S440, which are described in detail below:

[0047] Step S410: If the vehicle's mode signal indicates that the vehicle is in a transition mode from pure electric mode to range-extended mode, and the vehicle's main oil pressure reaches the first preset main oil pressure threshold, then the vehicle's gear speed is matched with the preset speed threshold.

[0048] Specifically, when the vehicle mode signal obtained by the vehicle controller indicates that the vehicle is in the transition mode from pure electric mode to range-extended mode, the vehicle's engine starts working, and the mechanical pump also starts cooling and lubrication. As the mechanical pump speed increases, the main oil pressure rises. When the main oil pressure rises to the first preset main oil pressure, the gear speed of the vehicle can be monitored and matched to the current gear speed to control the state of the pilot switch valve according to the current vehicle speed.

[0049] In step S420, if the gear speed of the vehicle is less than the first preset speed threshold, the control switch valve is in a coupled state.

[0050] Specifically, the vehicle's gear speed is obtained from the vehicle controller, and the current gear speed is compared with a preset first speed threshold. When the comparison result indicates that the current gear speed is lower than the preset first speed threshold, the pilot switch valve in the hybrid system of the vehicle is controlled to be in a coupled state.

[0051] In step S430, if the gear speed of the vehicle is greater than the second preset speed threshold, the control switch valve is in a decoupled state.

[0052] Specifically, the vehicle's gear speed is obtained from the vehicle controller, and the current gear speed is compared with a preset second speed threshold. When the comparison result indicates that the current gear speed is greater than the preset second speed threshold, the pilot switch valve in the hybrid system of the vehicle is decoupled.

[0053] Step S440: If the gear speed of the vehicle is within the range of a first preset speed threshold to a second preset speed threshold, then control the switching valve to maintain its current state; wherein, the first preset speed threshold is less than the second preset speed threshold.

[0054] The vehicle's gear speed is obtained from the vehicle controller, and the current gear speed is compared with a first preset speed threshold and a second preset speed threshold. When the comparison result determines that the current gear speed is within the range of the first preset speed threshold and the second preset speed threshold, including the case where the gear speed is the same as the first preset speed threshold or the gear speed is the same as the second preset speed threshold, the pilot switch valve in the hybrid system of the vehicle is controlled to maintain its current state.

[0055] Specifically, if the current gear speed of the vehicle is determined to be within the speed range formed by the first preset speed threshold and the second preset speed threshold based on the gear speed state, then the pilot switching valve in the hybrid power system of the vehicle is controlled to maintain its existing state. That is, if the gear speed of the vehicle decreases from above the second preset speed threshold to within the speed range formed by the first preset speed threshold and the second preset speed threshold, then the pilot switching valve in the hybrid power system of the vehicle is controlled to maintain its existing (decoupling) state; if the gear speed of the vehicle increases from below the first preset speed threshold to within the speed range formed by the first preset speed threshold and the second preset speed threshold, then the pilot switching valve in the hybrid power system of the vehicle is controlled to maintain its existing (coupling) state.

[0056] Furthermore, in the above embodiments, the first preset speed threshold is less than the second preset speed threshold.

[0057] In this embodiment, when it is determined that the vehicle is in a transition mode from pure electric mode to range-extended mode, and during this process the main oil pressure of the vehicle hybrid system has risen to the first preset main oil pressure, the state of the pilot switching valve in the vehicle hybrid system can be controlled by monitoring the gear speed of the vehicle. In this way, the state of the switching valve in the vehicle hybrid system can be controlled from multiple dimensions, and the needs of the vehicle mode can be responded to in a timely manner, thereby reducing the energy consumption of the vehicle.

[0058] Based on the above embodiments, please refer to Figure 5 In one exemplary embodiment provided in this application, the implementation process of step S320 may further include steps S510 to S540.

[0059] Detailed introduction is as follows:

[0060] Step S510: If the vehicle's mode signal indicates that the vehicle is in range-extending mode, and the vehicle's main oil pressure reaches the first preset main oil pressure threshold, then the vehicle's gear speed is matched with the preset speed threshold.

[0061] Specifically, the vehicle mode signal obtained from the vehicle controller indicates that the vehicle is in range-extending mode. The vehicle's engine starts working, and the mechanical pump also starts cooling and lubrication. As the mechanical pump speed increases, the main oil pressure rises. When the main oil pressure stabilizes at the first preset main oil pressure, the vehicle's gear speed can be monitored and matched to the vehicle's current gear speed to control the state of the pilot switch valve in the hybrid system according to the vehicle's current speed.

[0062] In step S520, if the vehicle's gear speed is less than the third preset speed threshold, the control switch valve is in a coupled state.

[0063] Specifically, the vehicle's gear speed is obtained from the vehicle controller, and the current gear speed is compared with a preset third speed threshold. When the comparison result indicates that the current gear speed is lower than the preset third speed threshold, the pilot switch valve in the hybrid system of the vehicle is controlled to be in a coupled state.

[0064] In step S530, if the gear speed of the vehicle is greater than the fourth preset speed threshold, the control switch valve is in a decoupled state.

[0065] Specifically, the vehicle's gear speed is obtained from the vehicle controller, and the current gear speed is compared with a preset fourth speed threshold. When the comparison result indicates that the current gear speed is greater than the preset fourth speed threshold, the pilot switch valve in the hybrid system of the vehicle is controlled to be in a decoupled state.

[0066] Step S540: If the gear speed of the vehicle is within the range of the third preset speed threshold to the fourth preset speed threshold, then the control switch valve is kept in its current state; wherein the third preset speed threshold is less than the fourth preset speed threshold.

[0067] The vehicle's gear speed is obtained from the vehicle controller, and the current gear speed is compared with a third preset speed threshold and a fourth preset speed threshold. When the comparison result determines that the current gear speed is within the range of the third preset speed threshold and the fourth preset speed threshold, including the case where the gear speed is the same as the third preset speed threshold or the gear speed is the same as the fourth preset speed threshold, the pilot switch valve in the hybrid system of the vehicle is controlled to maintain its current state.

[0068] Specifically, if the current gear speed of the vehicle is determined to be within the speed range formed by the third and fourth preset speed thresholds based on the gear speed status, then the pilot switch valve in the hybrid power system of the vehicle is controlled to maintain its existing state. That is, if the gear speed of the vehicle decreases from above the fourth preset speed threshold to within the speed range formed by the third and fourth preset speed thresholds, then the pilot switch valve in the hybrid power system of the vehicle is controlled to maintain its existing (decoupling) state; if the gear speed of the vehicle increases from below the third preset speed threshold to within the speed range formed by the third and fourth preset speed thresholds, then the pilot switch valve in the hybrid power system of the vehicle is controlled to maintain its existing (coupling) state.

[0069] Furthermore, in the above embodiments, the third preset speed threshold is less than the fourth preset speed threshold, and the third preset speed is greater than or equal to the second preset speed in the embodiment where the vehicle is in the transition mode from pure electric mode to range-extended mode.

[0070] In this embodiment, when it is determined that the vehicle is in range-extending mode and the main oil pressure of the vehicle has been stabilized at the first preset main oil pressure, the state of the pilot switch valve in the vehicle hybrid system can be controlled by monitoring the gear speed of the vehicle. In this way, the state of the pilot switch valve in the hybrid system can be controlled from three variable dimensions: vehicle mode, main oil pressure state, and gear speed. It can also respond to the needs of the vehicle hybrid system in a timely manner and reduce vehicle energy consumption.

[0071] Based on the above embodiments, please refer to Figure 6 In one exemplary embodiment provided in this application, the implementation process of step S320 may further include steps S610 to S630, which are described in detail below:

[0072] Step S610: If the vehicle's mode signal indicates that the vehicle is in a transition mode from range-extending mode to hybrid mode or is in hybrid mode, and the vehicle's main oil pressure reaches the second preset main oil pressure threshold, then the vehicle's gear speed is matched with the preset speed threshold.

[0073] Specifically, the vehicle mode signal obtained by the vehicle controller indicates that the vehicle is in a transition mode from range extender mode to hybrid mode. The vehicle's engine starts working, and the mechanical pump also starts cooling and lubrication. As the mechanical pump speed increases, the main oil pressure rises. When the main oil pressure rises to the second preset main oil pressure, the vehicle's gear speed can be monitored and matched in real time to control the state of the pilot switch valve in the hybrid system according to the vehicle's current speed.

[0074] Furthermore, based on the vehicle controller, the current mode signal of the vehicle is obtained, indicating that the vehicle is in hybrid mode. When the main oil pressure of the vehicle is stable at the second preset main oil pressure threshold, the gear speed of the vehicle can be monitored, and the real-time gear speed of the vehicle can be matched with the preset speed threshold to control the state of the pilot switching valve in the hybrid system according to the current vehicle speed.

[0075] In step S620, if the vehicle's gear speed is less than or equal to the fifth preset speed threshold, the control switch valve is in a coupled state.

[0076] Specifically, the vehicle's gear speed is obtained from the vehicle controller, and the current gear speed is compared with a preset fifth speed threshold. When the comparison result indicates that the current gear speed is less than or equal to the preset fifth speed threshold, the pilot switch valve in the hybrid power system of the vehicle is controlled to be in a coupled state.

[0077] In step S630, if the vehicle's gear speed is greater than the fifth preset speed threshold, the control switch valve is in a decoupled state.

[0078] Specifically, the vehicle's gear speed is obtained from the vehicle controller, and the current gear speed is compared with a pre-set fifth preset speed threshold. When the comparison result indicates that the current gear speed is greater than the pre-set fifth preset speed threshold, the pilot switch valve in the vehicle's hybrid system is controlled to be in a decoupled state.

[0079] In this embodiment, when the vehicle is in a transitional mode between range extender and hybrid modes, or is already in hybrid mode, and the main hydraulic pressure has reached the second preset main hydraulic pressure, the vehicle's gear speed is monitored, and the real-time gear speed is compared with a fifth preset speed threshold. To prevent the clutch from disengaging unexpectedly due to insufficient main hydraulic pressure, the gear ring speed is monitored to controllably switch between coupling and decoupling states. When the gear ring speed is consistently below the fifth preset speed threshold, the pilot switch valve remains in a coupled state. When the gear ring speed exceeds the fifth preset speed threshold, the pilot switch valve switches to a decoupled state and locks it in. This reduces the load and energy consumption of the electronic pump and prevents frequent switching from affecting the main hydraulic pressure. This not only ensures that the vehicle's main hydraulic pressure is not affected during mode switching but also achieves flexible control of the switching valves in the hybrid system through multi-dimensional variable control, ensuring timely response to the needs of the hybrid system.

[0080] Furthermore, based on the above embodiments, in one exemplary embodiment provided in this application, the implementation process of step S320 may further include the following steps, detailed below:

[0081] If the vehicle's mode signal indicates that the vehicle is in a transitional mode from hybrid mode to range extender mode, and the vehicle's main oil pressure reaches the second preset main oil pressure threshold, then the control switch valve will lock the previous mode state.

[0082] Specifically, based on the vehicle's mode signal obtained by the vehicle controller, if the mode signal indicates that the vehicle is in a transitional state between hybrid mode and range-extender mode, it is determined whether the main hydraulic pressure of the vehicle is fluctuating. If the main hydraulic pressure remains stable at a second preset threshold while the vehicle is in hybrid mode and range-extender mode, the pilot switch valve in the hybrid system remains locked in the previous mode state regardless of changes in the vehicle's gear speed. For example, the previous mode state of the pilot switch valve in the hybrid system can be determined by obtaining the vehicle's gear speed from the vehicle controller since the previous mode is hybrid mode, and comparing the current gear speed with a preset fifth preset speed threshold. If the comparison result indicates that the current gear speed is less than or equal to the preset fifth preset speed threshold, the switch valve in the hybrid system is controlled to be in a coupled state; if the comparison result indicates that the current gear speed is greater than the preset fifth preset speed threshold, the pilot switch valve in the hybrid system is controlled to be in a decoupled state.

[0083] In this embodiment, when the vehicle switches from hybrid mode to range extender mode, and the main oil pressure of the vehicle is stable at the second preset main oil pressure of the previous mode (hybrid mode), the pilot switch valve in the hybrid system of the vehicle is locked to remain unchanged in the state of the previous mode, regardless of how the gear speed of the vehicle changes, so as to ensure that the main oil pressure of the vehicle is not affected during mode switching.

[0084] Furthermore, based on the above embodiments, in one exemplary embodiment provided in this application, the implementation process of step S320 may further include the following steps, detailed below:

[0085] If the vehicle's mode signal indicates that the vehicle is in a transitional mode from range-extended mode to pure electric mode, and the vehicle's main oil pressure reaches the third preset main oil pressure threshold, then the control switch valve is in a coupled state.

[0086] Specifically, the vehicle's mode signal is obtained from the vehicle controller. If the vehicle's mode signal indicates that the vehicle is in a transition state from range-extended mode to pure electric mode, it is determined whether the main oil pressure of the vehicle is fluctuating. When the main oil pressure of the vehicle has reached the third preset main oil pressure threshold while the vehicle is in the state of switching from range-extended mode to pure electric mode, the pilot switch valve in the hybrid power system of the vehicle is controlled to be in a coupled state.

[0087] In this embodiment, when the vehicle switches from range-extended mode to pure electric mode, and the main oil pressure has steadily reached the third preset main oil pressure threshold, the switching valve of the vehicle's hybrid system is in the initial coupling state, so that the entire vehicle hybrid system can smoothly return to the initial state.

[0088] Furthermore, based on the above embodiments, please refer to... Figure 7 In one exemplary embodiment provided in this application, the implementation process of step S320 may further include the following steps S710 and S720, which are described in detail below:

[0089] Step S710: If the vehicle's mode signal indicates that the vehicle is in pure electric mode and the vehicle's main oil pressure reaches the third preset main oil pressure threshold, then the real-time oil temperature of the vehicle's hybrid system is obtained and matched with the preset oil temperature threshold.

[0090] In step S720, if the real-time oil temperature matches the preset oil temperature threshold, the control switch valve is kept in a coupled state.

[0091] Specifically, based on the vehicle's mode signal obtained from the vehicle controller, if the mode signal indicates that the vehicle is in pure electric mode and the main oil pressure is stable at a third preset main oil pressure threshold, then the real-time oil temperature of the vehicle's hybrid system is obtained. This can be achieved through methods such as... Figure 1 The temperature sensor shown in the circuit acquires the real-time oil temperature of the vehicle's hybrid system and matches the real-time oil temperature with a preset oil temperature threshold. When the real-time oil temperature matches the preset oil temperature threshold, the pilot switching valve in the vehicle's hybrid system is controlled to remain in a coupled state.

[0092] Furthermore, in this embodiment, if the real-time oil temperature of the vehicle is greater than the preset oil temperature threshold, the hybrid system of the vehicle is cooled. Specifically, in pure electric operating mode, since the mechanical pump is not working, the pilot switch valve is in a de-energized state, and the high-low pressure decoupling valve is in a coupled state, i.e., the right-hand working state, so that the electronic pump is connected to the high-pressure control oil circuit. The flow rate output by the electronic pump enters the high-pressure control oil circuit through the high-low pressure decoupling valve. The flow rate entering the high-pressure control oil circuit is filtered by the main pressure filter, which can effectively improve the cleanliness level of the oil entering each direct-drive solenoid valve at the downstream end and avoid valve core jamming.

[0093] After the high-pressure control oil circuit establishes the required oil pressure, the flow rate passes through the main pressure regulating mechanical valve into the low-pressure cooling lubrication oil circuit, enabling the electronic pump to supply oil to the low-pressure cooling lubrication oil circuit. At this time, the low-pressure cooling lubrication oil circuit can cool and lubricate the motor and clutch shaft gears. As an example, the low-pressure cooling lubrication oil circuit includes a hydraulic oil cooler and an external pressure filter connected to the hydraulic oil cooler.

[0094] In this embodiment, since the pure electric mode generally occurs after the vehicle's drive system is activated or when the vehicle switches back to the initial pure electric mode from range-extended mode, the pilot switch valve of the hybrid system is reset to the coupled state when the vehicle's main oil pressure and oil temperature reach the preset state, preparing for the system to switch to a higher oil pressure state (range-extended or direct drive). If the hybrid system's oil temperature reaches the preset oil temperature threshold, the pilot switch valve of the hybrid system will be locked in the coupled state to prevent main oil pressure fluctuations caused by frequent switching.

[0095] Figure 8 This is a simplified flowchart illustrating the on / off valve control of a hybrid system in an exemplary application scenario. Figure 8In the application scenario shown, the hybrid vehicle is configured as a series-parallel dual-motor system. Switching between pure electric, range-extended, and hybrid (direct drive) modes is achieved through clutch disengagement and engagement. In the hybrid system, high main hydraulic pressure is required to establish clutch engagement. This is achieved using a combination of an electric pump and a mechanical pump to increase the main hydraulic pressure. The mechanical pump supplies oil to the actuators. When the mechanical pump is operating at low speed and insufficient flow, the electric pump controls a pilot valve in the hybrid system to connect to the high-pressure circuit, providing rapid-response auxiliary oil supply and cooling lubrication. When the mechanical pump operates at high speed and sufficient flow, the pilot valve in the hybrid system is controlled to connect the electric pump to the low-pressure circuit, reducing the electric pump's energy consumption. Figure 8 As shown, when the vehicle drive system is activated, the vehicle is in pure electric mode. When the main oil pressure reaches the fourth preset main oil pressure threshold, the switching valve is fault-free, and the hybrid system oil temperature reaches above the preset oil temperature threshold, the control switching valve is reset to the coupling state to prepare for the system to switch to a higher oil pressure state. When the system oil temperature is below the preset oil temperature threshold, the switching valve is locked in the coupling state to prevent frequent switching from causing fluctuations in the main oil pressure.

[0096] like Figure 8 As shown, when the vehicle's overall state switches from pure electric mode to the transition state of range-extended mode, the main oil pressure also reaches the first preset main oil pressure threshold. At this time, the switching valve can be controlled by monitoring the vehicle gear speed. When the vehicle gear speed is less than the first preset speed threshold, the switching valve is controlled to be in a coupled state; when the vehicle gear speed is greater than the second preset speed threshold, the switching valve is controlled to be in a decoupled state; when the vehicle gear is within the range of the first preset speed threshold to the second preset speed threshold, the switching valve is controlled to maintain the current state.

[0097] like Figure 8 As shown, when the vehicle's overall state has been switched to range-extending mode, this mode, as the starting point of the hybrid mode, needs to ensure a rapid rise in main hydraulic pressure. Once the main hydraulic pressure stabilizes at the first preset main hydraulic pressure threshold, the switching valve can be controlled by monitoring the vehicle gear speed. When the vehicle gear speed is less than the third preset speed threshold, the switching valve is controlled in a coupled state; when the vehicle gear speed is greater than the fourth preset speed threshold, the switching valve is controlled in a decoupled state; when the vehicle gear speed is between the third and fourth preset speed thresholds, the switching valve maintains its current state.

[0098] like Figure 8As shown, when the vehicle is in a transitional state between range-extended mode and hybrid (direct drive) mode, or has successfully switched to hybrid mode, it is necessary to ensure that the main hydraulic pressure does not decrease during the mode switching process. When the vehicle's main hydraulic pressure reaches the second preset main hydraulic pressure threshold, the switching valve can be controlled by monitoring the vehicle's gear speed. When the vehicle's gear speed is less than or equal to the fifth preset speed threshold, the switching valve is controlled to be in a coupled state; when the vehicle's gear speed is greater than the fifth preset speed threshold, the switching valve is controlled to be in a decoupled state.

[0099] like Figure 8 As shown, when the vehicle is in the transition state between hybrid mode and range extender mode, it is necessary to ensure that the main oil pressure of the vehicle decreases steadily. When the main oil pressure of the vehicle is still at the second preset main oil pressure threshold, the control switch valve remains in the previous mode state regardless of how the vehicle's gear speed changes.

[0100] like Figure 8 As shown, when the vehicle switches from range extender mode to pure electric mode, the main hydraulic pressure has dropped to the third preset main hydraulic pressure threshold. The control valve is then in its initial coupling state, allowing the hybrid system to smoothly return to its initial state.

[0101] It should be noted that, in this embodiment, the first preset speed threshold is less than the second preset speed threshold, the second preset speed threshold is less than or equal to the fourth preset speed threshold, the third preset speed threshold is less than the fourth preset speed threshold, and the fourth preset speed threshold is less than the fifth preset speed threshold. Furthermore, the third preset main oil pressure threshold is less than the second preset main oil pressure threshold, and the second preset main oil pressure threshold is less than the third preset main oil pressure threshold. This embodiment is not intended to be limiting; those skilled in the art can set multiple preset speed thresholds and multiple preset main oil pressure thresholds according to actual needs.

[0102] Figure 9 This is a block diagram illustrating a switching valve control device for a hybrid system, as shown in an exemplary embodiment of this application. The device can be applied to... Figure 2 The implementation environment shown is specifically configured in the vehicle terminal 210. This device can also be applied to other exemplary implementation environments and specifically configured in other devices. This embodiment does not limit the implementation environment to which the device is applicable.

[0103] like Figure 9As shown, the block diagram of the exemplary hybrid system's switching valve control device includes: an acquisition module 910 for acquiring the vehicle's real-time mode signal, main oil pressure, and gear speed; a switching valve control module 920 for controlling the state of the switching valve in the vehicle's hybrid system according to the vehicle's mode signal, main oil pressure, and gear speed; and a high-low pressure decoupling valve switching module 930 for switching the state of the high-low pressure decoupling valve in the hybrid system according to the state of the switching valve, so that the electric pump in the hybrid system switches in the high-low pressure circuit as the state of the high-low pressure decoupling valve switches.

[0104] According to one aspect of this embodiment, the aforementioned switching valve control module 920 includes: a first matching subunit, configured to match the vehicle's gear speed with a preset speed threshold if the vehicle's mode signal indicates that the vehicle is in a transition mode from pure electric mode to range-extended mode, and the vehicle's main oil pressure reaches a first preset main oil pressure threshold; a first control subunit, configured to control the switching valve to be in a coupled state if the vehicle's gear speed is less than the first preset speed threshold; a second control subunit, configured to control the switching valve to be in a decoupled state if the vehicle's gear speed is greater than a second preset speed threshold; and a third control subunit, configured to control the switching valve to maintain its current state if the vehicle's gear speed is within the range of the first preset speed threshold to the second preset threshold; wherein the first preset speed threshold is less than the second preset speed threshold.

[0105] According to one aspect of this embodiment, the aforementioned switching valve control module 920 includes: a second matching subunit, configured to match the vehicle's gear speed with a preset speed threshold if the vehicle's mode signal indicates that the vehicle is in range-extending mode and the vehicle's main oil pressure reaches a first preset main oil pressure threshold; a fourth control subunit, configured to control the switching valve to be in a coupled state if the vehicle's gear speed is less than a third preset speed threshold; a fifth control subunit, configured to control the switching valve to be in a decoupled state if the vehicle's gear speed is greater than a fourth preset speed threshold; and a sixth control subunit, configured to control the switching valve to maintain its current state if the vehicle's gear speed is within the range of the third preset speed threshold to the fourth preset speed threshold; wherein the third preset speed threshold is less than the fourth preset speed threshold.

[0106] According to one aspect of this embodiment, the aforementioned switching valve control module 920 includes: a third matching subunit, configured to match the vehicle's gear speed with a preset speed threshold if the vehicle's mode signal indicates that the vehicle is in a transition mode from range-extending mode to hybrid mode or is in hybrid mode, and the vehicle's main oil pressure reaches a second preset main oil pressure threshold; a seventh control subunit, configured to control the switching valve to be in a coupled state if the vehicle's gear speed is less than or equal to a fifth preset speed threshold; and an eighth control subunit, configured to control the switching valve to be in a decoupled state if the vehicle's gear speed is greater than the fifth preset speed threshold.

[0107] According to one aspect of the embodiments of this application, the above-mentioned switching valve control module 920 includes: a ninth control subunit, used to control the switching valve to be in a coupled state if the vehicle's mode signal indicates that the vehicle is in a transition mode from range-extended mode to pure electric mode, and the vehicle's main oil pressure reaches a third preset main oil pressure threshold.

[0108] According to one aspect of the embodiments of this application, the above-mentioned switching valve control module 920 includes: a fourth matching subunit, configured to acquire the real-time oil temperature of the vehicle's hybrid system and match the real-time oil temperature with the preset oil temperature threshold if the vehicle's mode signal indicates that the vehicle is in pure electric mode and the vehicle's main oil pressure reaches a third preset main oil pressure threshold; and a tenth control subunit, configured to control the switching valve to maintain a coupled state if the real-time oil temperature matches the preset oil temperature threshold.

[0109] It should be noted that the on / off valve control device for the hybrid system provided in the above embodiments and the on / off valve control method for the hybrid system provided in the above embodiments belong to the same concept. The specific operation methods of each module and unit have been described in detail in the method embodiments and will not be repeated here. In practical applications, the on / off valve control device for the hybrid system provided in the above embodiments can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. This is not a limitation here.

[0110] Embodiments of this application also provide an electric vehicle, including: a switching valve control device for a hybrid system as described above.

[0111] Figure 10 A schematic diagram of a computer system suitable for implementing the embodiments of this application is shown. It should be noted that... Figure 10 The computer system 1000 of the electronic device shown is merely an example and should not impose any limitation on the functionality and scope of use of the embodiments of this application.

[0112] like Figure 10As shown, the computer system 1000 includes a Central Processing Unit (CPU) 1001, which can perform various appropriate actions and processes, such as executing the methods described in the above embodiments, based on programs stored in Read-Only Memory (ROM) 1002 or programs loaded from Storage Unit 1008 into Random Access Memory (RAM) 1003. The RAM 1003 also stores various programs and data required for system operation. The CPU 1001, ROM 1002, and RAM 1003 are interconnected via a bus 1004. An Input / Output (I / O) interface 1005 is also connected to the bus 1004.

[0113] The following components are connected to I / O interface 1005: an input section 1006 including a keyboard, mouse, etc.; an output section 1007 including a cathode ray tube (CRT), liquid crystal display (LCD), etc., and speakers, etc.; a storage section 1008 including a hard disk, etc.; and a communication section 1009 including a network interface card such as a LAN (Local Area Network) card, modem, etc. The communication section 1009 performs communication processing via a network such as the Internet. A drive 1010 is also connected to I / O interface 1005 as needed. Removable media 1011, such as a disk, optical disk, magneto-optical disk, semiconductor memory, etc., are installed on drive 1010 as needed so that computer programs read from them can be installed into storage section 1008 as needed.

[0114] Specifically, according to embodiments of this application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments of this application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program including a computer program for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via communication section 1009, and / or installed from removable medium 1011. When the computer program is executed by central processing unit (CPU) 1001, it performs various functions defined in the system of this application.

[0115] It should be noted that the computer-readable medium shown in the embodiments of this application can be a computer-readable signal medium or a computer-readable storage medium, or any combination of the two. A computer-readable storage medium can be, for example, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of a computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), flash memory, optical fiber, portable compact disc read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this application, a computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, carrying a computer-readable computer program. Such propagated data signals can take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. Computer-readable signal media can also be any computer-readable medium other than computer-readable storage media, which can send, propagate, or transmit a program for use by or in connection with an instruction execution system, apparatus, or device. The computer program contained on the computer-readable medium can be transmitted using any suitable medium, including but not limited to wireless, wired, etc., or any suitable combination thereof.

[0116] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. Each block in a flowchart or block diagram may represent a module, segment, or portion of code, which contains one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram or flowchart, and combinations of blocks in a block diagram or flowchart, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0117] The units described in the embodiments of this application can be implemented in software or hardware, and the described units can also be located in a processor. The names of these units do not necessarily limit the specific unit itself.

[0118] Another aspect of this application provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the aforementioned method for controlling the switching valves of a hybrid system. This computer-readable storage medium may be included in the electronic device described in the above embodiments, or it may exist independently and not incorporated into the electronic device.

[0119] Another aspect of this application provides a computer program product or computer program including computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the computer device to perform the on / off valve control method for the hybrid system provided in the various embodiments described above.

[0120] The above description is merely a preferred exemplary embodiment of this application and is not intended to limit the implementation of this application. Those skilled in the art can easily make corresponding modifications or alterations based on the main concept and spirit of this application. Therefore, the scope of protection of this application should be determined by the scope of protection claimed in the claims.

Claims

1. A switching valve control method of a hybrid system, for use in a hybrid system having a series-parallel configuration, characterized by, The method comprises: acquiring a mode signal, a main oil pressure and a gear speed of a vehicle in real time; controlling a state of a switch valve in a hybrid system of the vehicle according to the mode signal, the main oil pressure and the gear speed of the vehicle; switching a state of a high-low pressure decoupling valve of the hybrid system according to the state of the switch valve, so that an electronic pump in the hybrid system switches on a high-low pressure circuit along with the switching of the state of the high-low pressure decoupling valve; the controlling of the state of the switch valve in the hybrid system according to the mode signal, the main oil pressure and the gear speed of the vehicle comprises: if the mode signal of the vehicle represents that the vehicle is in a transition mode from a pure electric mode to an extended range mode, and the main oil pressure of the vehicle reaches a first preset main oil pressure threshold, then matching the gear speed of the vehicle with a preset speed threshold; if the gear speed of the vehicle is less than a first preset speed threshold, then controlling the switch valve to be in a coupling state; if the gear speed of the vehicle is greater than a second preset speed threshold, then controlling the switch valve to be in a decoupling state; if the gear speed of the vehicle is within the first preset speed threshold to the second preset speed threshold, then controlling the switch valve to keep a current state; wherein the first preset speed threshold is less than the second preset speed threshold.

2. The method of claim 1, wherein, the controlling of the state of the switch valve in the hybrid system according to the mode signal, the main oil pressure and the gear speed of the vehicle further comprises: if the mode signal of the vehicle represents that the vehicle is in the extended range mode, and the main oil pressure of the vehicle reaches the first preset main oil pressure threshold, then matching the gear speed of the vehicle with a preset speed threshold; if the gear speed of the vehicle is less than a third preset speed threshold, then controlling the switch valve to be in the coupling state; if the gear speed of the vehicle is greater than a fourth preset speed threshold, then controlling the switch valve to be in the decoupling state; if the gear speed of the vehicle is within the third preset speed threshold to the fourth preset speed threshold, then controlling the switch valve to keep the current state; wherein the third preset speed threshold is less than the fourth preset speed threshold.

3. The method of claim 1, wherein, the controlling of the state of the switch valve in the hybrid system according to the mode signal, the main oil pressure and the gear speed of the vehicle further comprises: if the mode signal of the vehicle represents that the vehicle is in a transition mode from the extended range mode to the hybrid mode or in the hybrid mode, and the main oil pressure of the vehicle reaches a second preset main oil pressure threshold, then matching the gear speed of the vehicle with a preset speed threshold; if the gear speed of the vehicle is less than or equal to a fifth preset speed threshold, then controlling the switch valve to be in the coupling state; if the gear speed of the vehicle is greater than the fifth preset speed threshold, then controlling the switch valve to be in the decoupling state.

4. The method of claim 3, wherein, the controlling of the state of the switch valve in the hybrid system according to the mode signal, the main oil pressure and the gear speed of the vehicle further comprises: if the mode signal of the vehicle represents that the vehicle is in a transition mode from the hybrid mode to the extended range mode, and the main oil pressure of the vehicle reaches the second preset main oil pressure threshold, then controlling the switch valve to lock a last mode state.

5. The method of claim 1, wherein, The method further comprises: if the mode signal of the vehicle indicates that the vehicle is in a transition mode from the extended-range mode to the pure electric mode, and the main oil pressure of the vehicle reaches a third preset main oil pressure threshold, controlling the switch valve to be in a coupled state.

6. The method of claim 5, wherein, The method further comprises: if the mode signal of the vehicle indicates that the vehicle is in the pure electric mode, and the main oil pressure of the vehicle reaches the third preset main oil pressure threshold, obtaining a real-time oil temperature of the hybrid system of the vehicle, and matching the real-time oil temperature with a preset oil temperature threshold; if the real-time oil temperature matches the preset oil temperature threshold, controlling the switch valve to remain in the coupled state.

7. A switching valve control device of a hybrid system, characterized by comprising: The method comprises: obtaining a mode signal, a main oil pressure, and a gear speed of a vehicle in real time; controlling a state of a switch valve in a hybrid system of the vehicle according to the mode signal, the main oil pressure, and the gear speed of the vehicle; switching a state of a high-low pressure decoupling valve of the hybrid system according to the state of the switch valve, so that an electronic pump in the hybrid system switches on a high-low pressure circuit along with the switching of the state of the high-low pressure decoupling valve; the switch valve control module comprises: a first matching subunit, configured to match a gear speed of the vehicle with a preset speed threshold if a mode signal of the vehicle indicates that the vehicle is in a transition mode from the pure electric mode to the extended-range mode, and the main oil pressure of the vehicle reaches a first preset main oil pressure threshold; a first control subunit, configured to control the switch valve to be in a coupled state if the gear speed of the vehicle is less than a first preset speed threshold; a second control subunit, configured to control the switch valve to be in a decoupled state if the gear speed of the vehicle is greater than a second preset speed threshold; and a third control subunit, configured to control the switch valve to remain in a current state if the gear speed of the vehicle is within the first preset speed threshold to the second preset speed threshold; wherein the first preset speed threshold is less than the second preset speed threshold.

8. An electric vehicle, characterized by The electric vehicle has the switch valve control device of the hybrid system as claimed in claim 7.

9. A computer-readable storage medium, characterized in that, A computer readable instruction is stored thereon, and when the computer readable instruction is executed by a processor of a computer, the computer executes the switch valve control method of the hybrid system as claimed in any one of claims 1 to 6.

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