Control Method and Electronic Device for Series-Parallel Mode of Hybrid Vehicle

Abstract

The present invention discloses a control method and an electronic device for a series-parallel mode of a hybrid vehicle. Wherein, the method includes: collecting the rotational speed of the engine and obtaining an accelerator pedal signal; determining a target torque of the drive system of the vehicle based on the accelerator pedal signal; determining a first threshold based on the rotational speed, the first threshold being the maximum output power when the drive system executes a parallel drive mode under a preset condition; generating a first control instruction based on the first threshold and the target torque, wherein the first control instruction is used to control the drive system to execute a series drive mode. The present invention solves the technical problem of the reduction of the NVH performance of the whole vehicle caused by the frequent switching of the drive mode of the vehicle.

Description

Technical Field

[0001] The present invention relates to the technical field of hybrid vehicle control, and in particular, to a control method and an electronic device for a series-parallel mode of a hybrid vehicle. Background Art

[0002] To ensure that the vehicle's NVH (Noise, Vibration, and Harshness) performance reaches a relatively high level during high-speed driving, if the driver has an acceleration demand during high-speed constant-speed driving, the hybrid vehicle will switch from the parallel mode to the series mode to ensure that the vehicle's acceleration smoothly reaches the driver's demand. However, since the engine operating point changes after the mode switch, the engine speed will increase rapidly, resulting in a certain deterioration of the vehicle's NVH and affecting the vehicle's drivability and comfort.

[0003] Regarding the problem of the reduction of the vehicle's NVH performance caused by the frequent switching of the vehicle's driving mode in the prior art, no effective solution has been proposed yet. Summary of the Invention

[0004] Embodiments of the present invention provide a control method and an electronic device for a series-parallel mode of a hybrid vehicle to at least solve the technical problem of the reduction of the vehicle's NVH performance caused by the frequent switching of the vehicle's driving mode.

[0005] According to one aspect of the embodiments of the present invention, a control method for a series-parallel mode of a hybrid vehicle is provided, including: collecting the engine speed and obtaining an acceleration pedal signal; determining a target torque of the vehicle's drive system based on the acceleration pedal signal; determining a first threshold based on the engine speed, where the first threshold is the maximum output power when the drive system executes the parallel drive mode under preset conditions; generating a first control instruction based on the first threshold and the target torque, where the first control instruction is used to control the drive system to execute the series drive mode.

[0006] Optionally, generating a first control instruction based on the first threshold and the target torque includes: determining whether the target torque is greater than or equal to the first threshold; and generating a first control instruction based on the target torque when the target torque is greater than or equal to the first threshold.

[0007] Optionally, before determining whether the target torque is greater than or equal to the first threshold, the method further includes: collecting the vehicle speed and obtaining a second threshold, where the second threshold is the minimum speed required for the drive system to execute the parallel drive mode; determining whether the target torque is greater than or equal to the first threshold when the vehicle speed is greater than or equal to the second threshold, and generating a first control instruction when the vehicle speed is less than the second threshold.

[0008] Optionally, before collecting the vehicle speed, the method further includes: collecting the gear position and engine state of the vehicle; and collecting the vehicle speed in response to the gear position meeting the gear preset condition and the engine state meeting the engine preset condition.

[0009] Optionally, determining the first threshold based on the rotational speed includes: obtaining reference information, where the reference information includes a preset universal characteristic table; and determining, based on the rotational speed, the output power corresponding to the rotational speed in the universal characteristic table as the first threshold.

[0010] Optionally, after obtaining the accelerator pedal signal, the method further includes: determining an accelerator pedal opening value, an accelerator pedal change rate, and an accelerator pedal change amount based on the accelerator pedal signal; and generating a second control instruction based on the accelerator pedal signal in response to the accelerator pedal signal not meeting any one of a first preset condition, a second preset condition, and a third preset condition, where the first preset condition is that the accelerator pedal opening value is equal to a first preset value, the second preset condition is that the accelerator pedal change rate is greater than a second preset value, the third preset condition is that the accelerator pedal change amount is greater than a third preset value, and the second control instruction is used to control the drive system to execute a parallel drive mode.

[0011] Optionally, after determining the accelerator pedal opening value, the accelerator pedal change rate, and the accelerator pedal change amount based on the accelerator pedal signal, the method further includes: collecting the vehicle speed; obtaining road condition information in response to the accelerator pedal signal not meeting any one of the first preset condition, the second preset condition, and the third preset condition, the accelerator pedal opening value meeting a fourth preset condition, and the vehicle speed meeting a fifth preset condition, where the road condition information includes a road gradient; determining whether the road gradient is less than a preset gradient; and generating a second control instruction when the road gradient is less than the preset gradient.

[0012] According to another aspect of the embodiments of the present invention, there is also provided a control device for a series-parallel mode of a hybrid vehicle, including: an acquisition module configured to acquire the rotational speed of the engine and an accelerator pedal signal; a first determination module configured to determine a target torque of the drive system of the vehicle based on the accelerator pedal signal; a second determination module configured to determine a first threshold based on the rotational speed, where the first threshold is the maximum output power when the drive system executes a parallel drive mode under a preset condition; and a generation module configured to generate a first control instruction based on the first threshold and the target torque, where the first control instruction is used to control the drive system to execute a series drive mode.

[0013] According to still another aspect of the embodiments of the present invention, there is also provided a non-volatile storage medium storing a computer program, where the computer program is configured to execute the above method when running.

[0014] According to another aspect of the embodiments of the present invention, an electronic device is further provided, including a memory, a processor, and a computer program stored on the memory and executable on the processor. Wherein, the above-mentioned processor executes the above-mentioned method through the computer program.

[0015] In the embodiments of the present invention, a method is adopted to determine the target torque of the drive system based on the accelerator pedal signal and determine the first threshold based on the rotational speed. A first control instruction is generated through the first threshold and the target torque, and the first control instruction is used to control the drive system to execute the series drive mode, achieving the purpose of determining the drive mode of the drive system according to the output power and target torque of the drive system, thereby realizing the technical effect of preventing the vehicle from frequently switching to the parallel drive mode, making the drive mode of the vehicle remain stable to the greatest extent, and further solving the technical problem of the reduction of the overall vehicle NVH performance caused by the frequent switching of the drive mode of the vehicle, effectively improving the drivability of the vehicle and the comfort of passengers. Description of the Drawings

[0016] The drawings described herein are used to provide a further understanding of the present invention, form a part of this application, and the schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0017] Figure 1 It is a hardware structure block diagram of a computer terminal for a control method of a series-parallel mode of a hybrid vehicle according to an optional embodiment of the present invention;

[0018] Figure 2 It is a flowchart of a control method of a series-parallel mode of a hybrid vehicle according to an optional embodiment of the present invention;

[0019] Figure 3 It is a flowchart of a control method of a series-parallel mode of a hybrid vehicle according to an optional embodiment of the present invention;

[0020] Figure 4 It is a flowchart of a control method of a series-parallel mode of a hybrid vehicle according to an optional embodiment of the present invention;

[0021] Figure 5 It is a structure block diagram of a control device for a series-parallel mode of a hybrid vehicle according to an optional embodiment of the present invention. Detailed Embodiments

[0022] To enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0023] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present invention described herein can be implemented in an order different from those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products, or devices.

[0024] According to one embodiment of the present invention, an embodiment of a control method for a series-parallel mode of a hybrid vehicle is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that here.

[0025] This method embodiment can be executed in an electronic device or a similar computing device that includes a memory and a processor in a vehicle. Taking running on the electronic device of a vehicle as an example, as Figure 1 shown, the electronic device of the vehicle can include one or more processors 102 (the processor can include, but is not limited to, a central processing unit (CPU), a graphics processing unit (GPU), a digital signal processing (DSP) chip, a microprocessor (MCU), a programmable logic device (FPGA), a neural network processor (NPU), a tensor processor (TPU), an artificial intelligence (AI) type processor, etc.) and a memory 104 for storing data. Optionally, the above-mentioned electronic device of the vehicle may further include a transmission device 106 for communication functions, an input / output device 108, and a display device 110. Those of ordinary skill in the art can understand that Figure 1 the structure shown is only schematic and does not limit the structure of the above-mentioned electronic device of the vehicle. For example, the electronic device of the vehicle may further include more or fewer components than those described in the above structure, or have a configuration different from that described in the above structure.

[0026] The memory 104 can be used to store computer programs, for example, software programs and modules of application software, such as the computer program corresponding to the control method of the series-parallel mode of the hybrid vehicle in the embodiments of the present invention. The processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, that is, implements the above-mentioned control method of the series-parallel mode of the hybrid vehicle. The memory 104 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memories, or other non-volatile solid-state memories. In some instances, the memory 104 may further include a memory remotely disposed relative to the processor 102, and these remote memories can be connected to the mobile terminal through a network. Examples of the above networks include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0027] The transmission device 106 is used to receive or send data via a network. Specific examples of the above network may include a wireless network provided by a communication provider of the mobile terminal. In one instance, the transmission device 106 includes a network adapter (Network Interface Controller, abbreviated as NIC), which can be connected to other network devices through a base station and thus can communicate with the Internet. In one instance, the transmission device may be a radio frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0028] The display device 110 can be, for example, a touch-screen liquid crystal display (LCD) and a touch display (also referred to as a "touch screen" or "touch display screen"). The liquid crystal display enables a user to interact with the user interface of the mobile terminal. In some embodiments, the above mobile terminal has a graphical user interface (GUI), and the user can perform human-computer interaction with the GUI through finger contacts and / or gestures on the touch-sensitive surface. The human-computer interaction function herein optionally includes the following interactions: creating web pages, drawing, word processing, creating electronic documents, games, video conferencing, instant messaging, sending and receiving emails, call interfaces, playing digital videos, playing digital music, and / or web browsing, etc. Executable instructions for performing the above human-computer interaction functions are configured / stored in a computer program product or a readable storage medium executable by one or more processors.

[0029] Hybrid vehicles in the prior art generally include a pure electric drive mode, a series drive mode, and a parallel drive mode. Hybrid vehicles often cause the switching of drive modes due to related non-essential operations, which in turn leads to changes in the operating points of at least some components, resulting in poor driving performance and comfort of the whole vehicle. Most of the control strategies for drive modes in the prior art are designed from the perspective of vehicle economy, and the NVH performance of the whole vehicle is reduced during mode switching, greatly affecting the driving performance of the whole vehicle. To solve the above problems, the technical solution of this application starts from the perspective of keeping the drive mode as comfortable as possible, and provides a control method for the series-parallel mode of a hybrid vehicle, which can optimize the NVH of the whole vehicle to the greatest extent, prioritize meeting the NVH requirements, and solve the NVH problems caused by frequent mode switching.

[0030] In this embodiment, a control method for the series-parallel mode of a hybrid vehicle running on the electronic device of the above vehicle is provided. Figure 2 It is a flowchart of a control method for the series-parallel mode of a hybrid vehicle according to an embodiment of the present invention, as Figure 2 shown, and the process includes the following steps:

[0031] Step S10, collect the engine speed and obtain the accelerator pedal signal;

[0032] Step S20, determine the target torque of the vehicle's drive system based on the accelerator pedal signal;

[0033] Step S30, determine a first threshold based on the speed. The first threshold is the maximum output power when the drive system executes the parallel drive mode under preset conditions.

[0034] It should be noted that the preset conditions are preset vehicle economy conditions. The first threshold is the maximum output power when the drive system executes the parallel drive mode under the preset economic conditions, that is, the maximum power that the engine and the power battery can provide under the preset economic conditions. When the target torque exceeds the maximum power of the drive system under the preset conditions, even if controlling the drive system to execute the series drive mode can meet the larger target torque demand, but because it does not meet the preset economic conditions, the drive system is controlled to execute the series drive mode. At this time, some parameters of the drive system executing the series drive mode can be adjusted to meet its increased target torque demand. The first threshold is Figure 3 the mode switching threshold in which the required power shown is less than the mode switching threshold, and the target torque is the required power.

[0035] Step 40, generate a first control instruction based on the first threshold and the target torque, where the first control instruction is used to control the drive system to execute the series drive mode.

[0036] Through the above steps, by determining the target torque of the drive system based on the accelerator pedal signal and determining the first threshold based on the rotational speed, a first control instruction is generated through the first threshold and the target torque. The first control instruction is used to control the drive system to execute the series drive mode, achieving the purpose of determining the drive mode of the drive system according to the output power and target torque of the drive system, thereby realizing the technical effect of preventing the vehicle from frequently switching to the parallel drive mode, keeping the drive mode of the vehicle stable to the greatest extent, and further solving the technical problem of the reduction of the vehicle's NVH performance caused by the frequent switching of the vehicle's drive mode, effectively improving the drivability of the vehicle and the comfort of passengers.

[0037] Optionally, in step S40, generating the first control instruction based on the first threshold and the target torque includes the following execution steps:

[0038] Judge whether the target torque is greater than or equal to the first threshold; in the case where the target torque is greater than or equal to the first threshold, generate the first control instruction based on the target torque. That is, only when the target torque is greater than or equal to the first threshold, control the drive system to execute the series drive mode. When the target torque is less than the first threshold and other preset conditions are met, control the drive system to execute the parallel drive mode. That is, the target torque being less than the first threshold is the lowest condition for controlling the drive system to start in the parallel drive mode or switch from the series drive mode to the parallel drive mode. When the target torque is greater than or equal to the first threshold, the drive system executes the series drive mode. The technical solution of this embodiment constructs a determination condition for the vehicle to switch to the parallel drive mode based on the target torque and the first threshold, which can effectively filter out some unnecessary mode switches, and thus improve the drivability and comfort of the whole vehicle.

[0039] Optionally, before judging whether the target torque is greater than or equal to the first threshold, the method further includes: collecting the vehicle speed, obtaining a second threshold, where the second threshold is the minimum speed required for the drive system to execute the parallel drive mode; in the case where the vehicle speed is greater than or equal to the second threshold, judge whether the target torque is greater than or equal to the first threshold, and in the case where the vehicle speed is less than the second threshold, generate the first control instruction.

[0040] That is, to ensure that the drive system of the vehicle can execute the parallel drive mode or switch from the series drive mode to the parallel drive mode, the vehicle speed must be greater than the second threshold. The technical solution of this embodiment designs one of the conditions for executing the parallel drive mode through the vehicle speed, realizing the vehicle speed correction condition for preventing the vehicle from frequently switching modes.

[0041] Optionally, before collecting the vehicle speed, the method further includes: collecting the vehicle gear position and the engine state; in response to the gear position meeting the gear position preset condition and the engine state meeting the engine preset condition, collect the vehicle speed.

[0042] In the technical solution of this embodiment, the preset condition of the engine is that the engine is in the starting state, and the preset condition of the gear position is the driving gear position.

[0043] Optionally, determining the first threshold based on the rotational speed includes: obtaining comparison information, where the comparison information includes a preset universal characteristic table; based on the rotational speed, determining the output power corresponding to the rotational speed in the universal characteristic table as the first threshold.

[0044] That is to say, the first threshold is obtained by looking up the preset comparison information according to the rotational speed. Further, the first threshold corresponding to the rotational speed can be obtained by means of online evaluation and calculation of the first threshold.

[0045] Such as Figure 3 shown is a flowchart of one embodiment of the control method for the series-parallel mode of a hybrid vehicle. Among them, when the vehicle speed, required power (i.e., target torque), etc. meet the above-mentioned series-to-parallel mode switching conditions, the mode is switched, from series to parallel, and the vehicle is controlled to execute the parallel drive mode.

[0046] Optionally, after obtaining the accelerator pedal signal, the method further includes: determining the accelerator pedal opening value, accelerator pedal change rate, and accelerator pedal change amount based on the accelerator pedal signal; when the accelerator pedal signal does not meet any one of the first preset condition, the second preset condition, and the third preset condition, generating a second control instruction based on the accelerator pedal signal, where the first preset condition is that the accelerator pedal opening value is equal to the first preset value, the second preset condition is that the accelerator pedal change rate is greater than the second preset value, the third preset condition is that the accelerator pedal change amount is greater than the third preset value, and the second control instruction is used to control the drive system to execute the parallel drive mode.

[0047] In an alternative embodiment, the first preset condition is that the accelerator pedal opening value reaches 100%, the second preset condition is that the accelerator pedal change rate is greater than 25% / s, and the third preset condition is that the accelerator pedal change amount is greater than 10%. When the vehicle meets the first preset condition, it indicates that the vehicle may be in an emergency avoidance state. Therefore, when the first preset condition is met, the drive system needs to be controlled to execute the series drive mode to improve the dynamic performance of the vehicle. When the vehicle meets the second preset condition or the third preset condition, it indicates that the driver is stepping on the accelerator pedal relatively urgently at this time, and the vehicle needs to switch to the series drive mode to improve the dynamic performance. Therefore, when the accelerator pedal signal does not meet any one of the first preset condition, the second preset condition, and the third preset condition, controlling the drive system to execute the parallel drive mode can effectively perform accelerator pedal correction on unnecessary mode switching based on the accelerator pedal signal. Such a setting achieves different mode switching strategies according to different driver operations, and achieves a certain balance among power performance, economy, and NVH, and reaches the technical effect of balancing comfort and economy.

[0048] Optionally, when the accelerator pedal signal meets any one of the first preset condition, the second preset condition, and the third preset condition, the drive system enters the parallel - series mode switching preparation. In this preparation state, the driving mode intention of the driver is obtained to determine whether to control the drive system to operate in the series mode. Optionally, after determining the accelerator pedal opening value, the accelerator pedal change rate, and the accelerator pedal change amount based on the accelerator pedal signal, the method further includes:

[0049] Collect the vehicle speed;

[0050] In response to the accelerator pedal signal not meeting any one of the first preset condition, the second preset condition, and the third preset condition, when the accelerator pedal opening value meets the fourth preset condition and the vehicle speed meets the fifth preset condition, road condition information is obtained, where the road condition information includes the road gradient;

[0051] That is to say, the fourth preset condition is that the accelerator pedal opening value increases, and the fifth preset condition is that the vehicle speed decreases. When the vehicle meets both the fourth preset condition and the fifth preset condition, it indicates that the vehicle is in a special road condition environment and needs to increase the power output of the drive system. Among them, the special road condition environment includes going uphill.

[0052] Judge whether the road gradient is less than the preset gradient;

[0053] Optionally, the preset gradient is set to 5%.

[0054] In the case where the road gradient is less than the preset gradient, a second control instruction is generated.

[0055] In an alternative embodiment, after the vehicle enters the parallel mode drive, if the vehicle speed decreases during the process of increasing the throttle opening without meeting any one of the first preset condition, the second preset condition, and the third preset condition, it is judged according to the ramp value. If the ramp is less than 5%, the actual engine power is continuously increased according to the required power in the parallel mode to keep the vehicle speed unchanged, and no parallel - series mode switching is performed. If the ramp is not less than 5%, parallel - series mode switching is performed according to the actual power requirement. Such a setting achieves the technical effect of adopting different mode switching strategies according to the driving road ramp to ensure normal power demand while maintaining good NVH.

[0056] In an alternative embodiment, the driving mode of the driver is obtained. If the driving mode does not adopt the NVH - priority strategy, parallel - series mode switching is performed. If the driving mode adopts the NVH - priority strategy, no mode switching is performed. Generally, the comfort mode tends to consider the feelings of the driver and passengers and adopts the NVH - priority strategy, while the economy mode focuses on lower fuel consumption and does not adopt the NVH - priority strategy.

[0057] Adopting the technical solution of this application, on the premise of determining the driver's operation intention, by means of driving mode correction, accelerator pedal correction, etc., the driving mode is kept stable to the greatest extent to preferentially meet the NVH requirements and solve the NVH problems caused by frequent mode switching. At the same time, according to the different driving modes of the drive system and different series-parallel mode switching conditions, an adaptive drive mode switching is realized.

[0058] Figure 5 It is a structural block diagram of a control device for a series-parallel mode of a hybrid vehicle according to an embodiment of the present invention. As Figure 5 shown, the device includes: an acquisition module 51 for acquiring the engine speed and the accelerator pedal signal; a first determination module 52 for determining the target torque of the vehicle's drive system based on the accelerator pedal signal; a second determination module 53 for determining a first threshold based on the speed, where the first threshold is the maximum output power when the drive system executes the parallel drive mode under preset conditions; a generation module 54 for generating a first control instruction based on the first threshold and the target torque, and the first control instruction is used to control the drive system to execute the series drive mode.

[0059] Through the above device, by determining the target torque of the drive system based on the accelerator pedal signal and determining the first threshold based on the speed, and generating a first control instruction through the first threshold and the target torque, the first control instruction is used to control the drive system to execute the series drive mode, achieving the purpose of determining the drive mode of the drive system according to the output power and target torque of the drive system, thereby realizing the technical effect of preventing the vehicle from frequently switching to the parallel drive mode, keeping the drive mode of the vehicle stable to the greatest extent, and further solving the technical problem of the reduction of the NVH performance of the whole vehicle caused by the frequent switching of the drive mode of the vehicle, effectively improving the drivability of the vehicle and the comfort of passengers.

[0060] It should be noted that the above-mentioned various modules can be implemented by software or hardware. For the latter, it can be implemented in the following ways, but not limited to this: the above-mentioned modules are all located in the same processor; or, the above-mentioned various modules are respectively located in different processors in any combination form.

[0061] An embodiment of the present invention also provides a non-volatile storage medium, in which a computer program is stored, and the computer program is set to execute the steps in any one of the above method embodiments when running.

[0062] Optionally, in this embodiment, the above storage medium can be set to store a computer program for executing the following steps:

[0063] Step S1, collect the engine speed and obtain the accelerator pedal signal;

[0064] Step S2, determine the target torque of the vehicle's drive system based on the accelerator pedal signal;

[0065] Step S3, determine a first threshold based on the rotational speed, where the first threshold is the maximum output power when the drive system executes the parallel drive mode under preset conditions;

[0066] Step S4, generate a first control instruction based on the first threshold and the target torque, where the first control instruction is used to control the drive system to execute the series drive mode.

[0067] An embodiment of the present invention also provides an electronic device, including a memory and a processor, and the processor is configured to run a computer program to execute the steps in any one of the above method embodiments.

[0068] Optionally, in this embodiment, the above processor may be configured to execute the following steps through a computer program:

[0069] Step S1, collect the rotational speed of the engine and obtain the accelerator pedal signal;

[0070] Step S2, determine the target torque of the vehicle's drive system based on the accelerator pedal signal;

[0071] Step S3, determine a first threshold based on the rotational speed, where the first threshold is the maximum output power when the drive system executes the parallel drive mode under preset conditions;

[0072] Step S4, generate a first control instruction based on the first threshold and the target torque, where the first control instruction is used to control the drive system to execute the series drive mode.

[0073] Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments and optional implementation manners, and will not be elaborated herein.

[0074] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages and disadvantages of the embodiments.

[0075] In the above embodiments of the present invention, the descriptions of the various embodiments have their own emphases. For the parts not detailed in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

[0076] In several embodiments provided by the present application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only illustrative. For example, the division of units can be a logical function division. In actual implementation, there can be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the couplings, direct couplings, or communication connections shown or discussed with each other can be through some interfaces. The indirect couplings or communication connections of units or modules can be in electrical or other forms.

[0077] The units described as separate components may or may not be physically separated. The components shown as units may or may not be physical units, that is, they can be located in one place or distributed to multiple units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0078] In addition, in each embodiment of the present invention, the functional units can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

[0079] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods in each embodiment of the present invention. The aforementioned storage medium includes: USB flash drives, read-only memories (ROMs), random access memories (RAMs), mobile hard disks, magnetic disks, or optical discs, etc., which can store program codes.

[0080] The above is only the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A control method for a series-parallel mode of a hybrid vehicle, characterized in that, including: Collect the engine speed and obtain the accelerator pedal signal; Determine the target torque of the vehicle's drive system based on the accelerator pedal signal; Determine a first threshold based on the engine speed, where the first threshold is the maximum output power when the drive system executes the parallel drive mode under preset conditions; Generate a first control instruction based on the first threshold and the target torque, where the first control instruction is used to control the drive system to execute the series drive mode; wherein, generating the first control instruction based on the first threshold and the target torque includes: Judge whether the target torque is greater than or equal to the first threshold; When the target torque is greater than or equal to the first threshold, generate the first control instruction based on the target torque.

2. The method according to claim 1, wherein Before judging whether the target torque is greater than or equal to the first threshold, the method further includes: Collect the vehicle speed, obtain a second threshold, where the second threshold is the minimum speed required for the drive system to execute the parallel drive mode; When the vehicle speed is greater than or equal to the second threshold, judge whether the target torque is greater than or equal to the first threshold. When the vehicle speed is less than the second threshold, generate the first control instruction.

3. The method according to claim 2, wherein Before collecting the vehicle speed, the method further includes: Collect the vehicle gear position and engine state; In response to the gear position satisfying the gear position preset condition and the engine state satisfying the engine preset condition, collect the vehicle speed.

4. The method according to claim 1, characterized in that, Determining the first threshold based on the engine speed includes: Obtain comparison information, where the comparison information includes a preset universal characteristic table; Based on the engine speed, determine the output power corresponding to the engine speed in the universal characteristic table as the first threshold.

5. The method according to claim 1, wherein After obtaining the accelerator pedal signal, the method further includes: Determine the accelerator pedal opening value, accelerator pedal change rate, and accelerator pedal change amount based on the accelerator pedal signal; When the accelerator pedal signal does not satisfy any of the first preset condition, the second preset condition, and the third preset condition, generate a second control instruction based on the accelerator pedal signal, where the first preset condition is that the accelerator pedal opening value is equal to the first preset value, the second preset condition is that the accelerator pedal change rate is greater than the second preset value, the third preset condition is that the accelerator pedal change amount is greater than the third preset value, and the second control instruction is used to control the drive system to execute the parallel drive mode.

6. The method according to claim 5, wherein After determining the accelerator pedal opening value, accelerator pedal change rate, and accelerator pedal change amount based on the accelerator pedal signal, the method further includes: Collect the vehicle speed; When the accelerator pedal signal does not satisfy any of the first preset condition, the second preset condition, and the third preset condition, and the accelerator pedal opening value satisfies the fourth preset condition and the vehicle speed satisfies the fifth preset condition, obtain road condition information, where the road condition information includes the road gradient; Judge whether the road gradient is less than the preset gradient; When the road gradient is less than the preset gradient, generate the second control instruction.

7. A control device for a series-parallel mode of a hybrid vehicle, characterized in that, including: An acquisition module for acquiring the engine speed and the accelerator pedal signal; A first determination module for determining the target torque of the vehicle's drive system based on the accelerator pedal signal; A second determination module for determining a first threshold based on the engine speed, where the first threshold is the maximum output power when the drive system executes the parallel drive mode under preset conditions; A generation module for generating a first control instruction based on the first threshold and the target torque, where the first control instruction is used to control the drive system to execute the series drive mode; wherein, generating the first control instruction based on the first threshold and the target torque includes: determining whether the target torque is greater than or equal to the first threshold; in the case where the target torque is greater than or equal to the first threshold, generating the first control instruction based on the target torque.

8. A non-volatile storage medium, characterized in that, The non-volatile storage medium includes a stored program, wherein when the program runs, it controls the device where the non-volatile storage medium is located to execute the method according to any one of claims 1 to 6.

9. An electronic device, comprising a memory and a processor, characterized in that, A computer program is stored in the memory, and the processor is configured to run the computer program to execute the method according to any one of claims 1 to 6.

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