Driving Control Method, Electronic Device and Storage Medium of Range-Extended Electric Vehicle

Abstract

The present application provides a drive control method, an electronic device and a storage medium for an extended-range electric vehicle. The method is applied to a drive control device, which includes: a generator, a drive motor, an engine, a first clutch and a second clutch; the engine is connected to the generator via a generator gear set, and the engine is connected to the drive motor via the first clutch, an engine gear set, a drive motor gear set and the second clutch; the method includes: when the engine is not fully started, controlling the second clutch to close, controlling the vehicle's power battery to supply power to the drive motor, and controlling the drive motor to drive the vehicle to move; otherwise, determining the opening and closing states of the first clutch and the second clutch according to the vehicle's driving speed, the engine torque of the engine and the engine speed of the engine. The present application can reduce the fuel consumption and power consumption of the vehicle and improve the energy utilization rate.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle drive, and particularly to a drive control method, an electronic device and a storage medium for a range-extended electric vehicle. Background Art

[0002] A range-extended electric vehicle is a pure-electric drive vehicle equipped with a power battery and an auxiliary power unit. When the electric energy is sufficient, the power battery provides all the energy required for the vehicle to travel. When the electric energy is insufficient, the auxiliary power unit works.

[0003] Currently, there are two configurations for range-extended electric vehicles, including a series range-extended electric vehicle and a parallel-series range-extended electric vehicle. In a series range-extended electric vehicle, the drive motor is the driving power source, and the engine does not directly drive the vehicle. Only when the power of the power battery drops to a certain level, the engine will start to drive the generator to generate electricity and provide energy for the drive motor. The power system of the series range-extended electric vehicle is relatively simple and the cost is low. In a parallel-series range-extended electric vehicle, it is driven in series at low speeds and the motor and the engine jointly drive the vehicle at high speeds. In the power holding stage, its power performance and fuel consumption are better than those of the series range-extended electric vehicle.

[0004] However, the existing parallel-series range-extended electric vehicle adjusts the connection mode according to the power of the power battery, which will cause the vehicle to only consider the power problem under working conditions such as medium-high speed acceleration and medium-high speed cruising, resulting in insufficient power. If the power of the engine and the generator is increased to improve the power performance, due to the loss of secondary energy conversion, problems such as high power consumption, poor economy, high mechanical loss of the drive motor, and low efficiency will occur. Summary of the Invention

[0005] In view of the above-mentioned defects or deficiencies in the prior art, the present application aims to provide a drive control method, an electronic device and a storage medium for a range-extended electric vehicle to solve the problems of excessive energy consumption of the electric vehicle under working conditions such as medium-high speed acceleration and medium-high speed cruising, and the low energy utilization rate caused by the low power generation conversion efficiency of the engine through the generator and the high mechanical loss of the drive motor.

[0006] An embodiment of the present application provides a drive control method for a range-extended electric vehicle, which is applied to a drive control device. The drive control device includes: a generator, a drive motor, an engine, a first clutch and a second clutch. Among them, the engine is connected to the generator via a generator gear set, and the engine is connected to the drive motor via the first clutch, an engine gear set, a drive motor gear set and the second clutch. The method includes:

[0007] When the engine is not fully started, control the second clutch to close, control the vehicle's power battery to supply power to the drive motor, and control the drive motor to drive the vehicle to move;

[0008] Otherwise, determine the opening and closing states of the first clutch and the second clutch according to the vehicle's driving speed, the engine torque of the engine, and the engine speed of the engine, so as to drive the vehicle to move.

[0009] Optionally, the determining the opening and closing states of the first clutch and the second clutch according to the vehicle's driving speed, the engine torque of the engine, and the engine speed of the engine, so as to drive the vehicle to move includes:

[0010] When the vehicle's driving speed does not reach the first speed threshold, control the first clutch to disengage and the second clutch to engage, so that the engine and the generator are in series, and control the drive motor to drive the vehicle to move;

[0011] When the vehicle's driving speed reaches the first speed threshold and does not reach the second speed threshold, determine the opening and closing states of the first clutch and the second clutch according to the engine torque and the engine speed, so as to drive the vehicle to move;

[0012] When the vehicle's driving speed reaches the second speed threshold, control the first clutch to engage and the second clutch to disengage, control the generator not to generate electricity, and control the engine to drive the vehicle to move.

[0013] Optionally, the determining the opening and closing states of the first clutch and the second clutch according to the engine torque and the engine speed, so as to drive the vehicle to move includes:

[0014] Determine the initial economic index of the vehicle according to the engine torque and the engine speed;

[0015] When the initial economic index is less than the preset threshold, determine the opening and closing states of the first clutch and the second clutch according to the engine torque, so as to drive the vehicle to move.

[0016] Optionally, the determining the opening and closing states of the first clutch and the second clutch according to the engine torque, so as to drive the vehicle to move includes:

[0017] When the engine torque is greater than the first torque threshold, control the first clutch to close and the second clutch to close, and control the drive motor and the engine to drive the vehicle in parallel to reduce the engine torque through the drive motor;

[0018] Adjust the drive motor, update the engine torque and the engine speed, and determine the current economic index of the vehicle according to the updated engine torque and engine speed;

[0019] When the current economic index is less than the preset threshold, return to execute the step of adjusting the drive motor until the current economic index is not less than the preset threshold.

[0020] Optionally, determining the opening and closing states of the first clutch and the second clutch according to the engine torque to drive the vehicle includes:

[0021] When the engine torque is less than the second torque threshold, control the first clutch to close and the second clutch to open, control the generator to generate electricity, and control the engine to drive the vehicle to increase the engine torque through the generator;

[0022] Adjust the generator, update the engine torque and the engine speed, and determine the current economic index of the vehicle according to the updated engine torque and engine speed;

[0023] When the current economic index is less than the preset threshold, return to execute the step of adjusting the generator until the current economic index is not less than the preset threshold.

[0024] Optionally, it further includes:

[0025] When the current power of the vehicle's power battery is lower than the preset power, control the first clutch to close and the second clutch to close, and control the drive motor and the engine to drive the vehicle in parallel;

[0026] Control the generator to charge the vehicle's power battery.

[0027] Optionally, it further includes:

[0028] When the wheel torque of the vehicle is greater than the preset torque and / or the current opening of the vehicle's accelerator pedal is greater than the preset opening, control the first clutch to close and the second clutch to close, and control the drive motor and the engine to drive the vehicle in parallel.

[0029] Optionally, it further includes:

[0030] When the opening and closing state of the first clutch is switched and / or the opening and closing state of the second clutch is switched, control the change of the engine torque gradient of the engine.

[0031] In summary, the present application proposes a drive control method for an extended-range electric vehicle. When the engine is not fully started, control the second clutch to close, control the power battery of the vehicle to supply power to the drive motor, and control the drive motor to drive the vehicle to move. Otherwise, according to the driving speed of the vehicle, the engine torque of the engine, and the engine speed of the engine, determine the opening and closing states of the first clutch and the second clutch to drive the vehicle to move, realizing the adjustment of the connection mode of the engine according to the starting state of the engine, and combining the driving speed, engine torque, and engine speed of the vehicle to adjust the connection modes of the engine, generator, and drive motor, comprehensively considering energy utilization rate, power performance, and economy, reducing the fuel consumption and power consumption of the vehicle, and improving the energy utilization rate. Description of the Drawings

[0032] Figure 1 It is a schematic structural diagram of a drive control device provided by an embodiment of the present application;

[0033] Figure 2 It is a flowchart of a drive control method for an extended-range electric vehicle provided by an embodiment of the present application;

[0034] Figure 3 It is a flowchart of another drive control method for an extended-range electric vehicle provided by an embodiment of the present application;

[0035] Figure 4 It is a schematic structural diagram of an electronic device provided by an embodiment of the present application. Detailed Embodiments

[0036] The following further elaborates the present application in detail with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related invention, rather than limiting the invention. Additionally, it should be noted that for the sake of description, only the parts related to the invention are shown in the drawings.

[0037] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The following will elaborate on the present application in detail with reference to the drawings and embodiments.

[0038] As mentioned in the background art, in view of the problems in the prior art, the present application proposes a drive control method for a range-extended electric vehicle. This method is applied to a drive control device, which includes: a generator, a drive motor, an engine, a generator gear set, an engine gear set, a drive motor gear set, a first clutch, and a second clutch. Among them, the engine is connected to the generator via the generator gear set, and the engine is connected to the drive motor via the first clutch, the engine gear set, the drive motor gear set, and the second clutch. Among them, the structural schematic diagram of the drive control device is as shown in Figure 1 . The engine gear set and the drive motor gear set can be respectively connected to a differential through other gear sets to provide power for the movement of the vehicle. And, the drive motor can be powered by the vehicle's power battery, or the power battery can be charged by the generator. Among them, the solid arrows indicate the torque transmission direction, and the dashed arrows indicate the energy transmission direction. The drive control method for the range-extended electric vehicle provided by the embodiments of the present invention can be executed by an electronic device.

[0039] Figure 2 is a flowchart of a drive control method for a range-extended electric vehicle provided by an embodiment of the present application. Refer to Figure 2 . Specifically, the drive control method for the range-extended electric vehicle includes:

[0040] S110. When the engine is not fully started, control the second clutch to close, control the vehicle's power battery to supply power to the drive motor, and control the drive motor to drive the vehicle to move.

[0041] Specifically, since the vehicle's engine starts for the first time and the catalytic converter heating is not completed, the engine may not be fully started. In this case, the engine cannot participate in driving the vehicle. Therefore, control the second clutch to close, control the vehicle's power battery to supply power to the drive motor, and control the drive motor to start, so that the drive motor drives the vehicle via the closed second clutch to make the vehicle move.

[0042] S120. Otherwise, determine the opening and closing states of the first clutch and the second clutch according to the vehicle's driving speed, the engine torque of the engine, and the engine speed of the engine to drive the vehicle to move.

[0043] Among them, the driving speed can be the vehicle speed obtained through the vehicle's on-board system, or the vehicle speed obtained by converting the wheel speed, etc. The engine speed can be the engine speed obtained according to the vehicle's sensors, etc. The engine torque can be the engine torque obtained according to the vehicle's sensors, etc.

[0044] Specifically, when the engine is fully started, the engine can be engaged in vehicle driving. Therefore, the connection states of the motor, the engine, and the drive motor can be determined based on the vehicle's driving speed, the engine torque of the engine, and the engine speed of the engine. Furthermore, based on the connection requirements, the opening and closing states of the first clutch and the second clutch can be determined to enable the vehicle to move.

[0045] Based on the above example, in order to improve the energy utilization rate under working conditions such as medium and high-speed acceleration, the following can also be done:

[0046] When the wheel torque of the vehicle is greater than the preset torque and / or the current opening of the vehicle's accelerator pedal is greater than the preset opening, control the first clutch to close, the second clutch to close, and control the drive motor and the engine to drive the vehicle in parallel.

[0047] Among them, the wheel torque can be the torque that keeps the wheels rotating obtained according to vehicle sensors, etc. The preset torque can be a torque value preset for triggering parallel drive, such as 1000 N·m, etc. The current opening can be the opening of the vehicle's accelerator pedal obtained according to vehicle sensors, etc., such as 20%, etc. The preset opening can be the opening percentage preset for triggering parallel drive.

[0048] Specifically, if the wheel torque of the vehicle is greater than the preset torque and / or the current opening of the vehicle's accelerator pedal is greater than the preset opening, it indicates that the pure electric drive mode and the drive mode in which the engine, the generator, and the drive motor are connected in series cannot meet the drive requirements. In order to reduce energy loss, the first clutch can be controlled to close, the second clutch can be controlled to close, and the drive motor and the engine can be controlled to start, so that the drive motor and the engine drive the vehicle in parallel.

[0049] Based on the above example, in order to ensure the smoothness of vehicle movement and avoid excessive mechanical wear of each gear set, the engine torque change can be adjusted in the following way:

[0050] When the opening and closing state of the first clutch is switched and / or the opening and closing state of the second clutch is switched, control the gradient change of the engine torque of the engine.

[0051] Specifically, if the opening and closing state of the first clutch is switched and / or the opening and closing state of the second clutch is switched, it indicates that the engine joins in driving the vehicle in different connection ways. At this time, control the gradient change of the engine torque of the engine to gradually withdraw and / or increase the torque, avoiding the adverse effects caused by too large instantaneous torque change.

[0052] The drive control method for an extended-range electric vehicle provided by an embodiment of the present application controls the second clutch to close when the engine is not fully started, controls the power battery of the vehicle to supply power to the drive motor, and controls the drive motor to drive the vehicle to move. Otherwise, according to the driving speed of the vehicle, the engine torque of the engine, and the engine speed of the engine, the opening and closing states of the first clutch and the second clutch are determined to drive the vehicle to move, realizing the adjustment of the connection mode of the engine according to the starting state of the engine, and combining the driving speed, engine torque, and engine speed of the vehicle to adjust the connection modes of the engine, generator, and drive motor. Considering energy utilization rate, power performance, and economy comprehensively, the fuel consumption and power consumption of the vehicle are reduced, and the energy utilization rate is improved.

[0053] Figure 3 It is a flowchart of another drive control method for an extended-range electric vehicle provided by an embodiment of the present application. On the basis of the above embodiments, an exemplary description is given of the process of determining the opening and closing states of the first clutch and the second clutch to drive the vehicle to move when the engine of the vehicle is fully started. Refer to Figure 3 , the drive control method for this extended-range electric vehicle specifically includes:

[0054] S210. Determine whether the engine is fully started. If not, execute S220; if so, execute S230.

[0055] S220. Control the second clutch to close, control the power battery of the vehicle to supply power to the drive motor, and control the drive motor to drive the vehicle to move.

[0056] S230. Determine the magnitude relationship between the driving speed of the vehicle and the first speed threshold and the second speed threshold. When the driving speed of the vehicle does not reach the first speed threshold, execute S240; when the driving speed of the vehicle reaches the first speed threshold and does not reach the second speed threshold, execute S250; when the driving speed of the vehicle reaches the second speed threshold, execute S260.

[0057] Among them, the second speed threshold is greater than the first speed threshold, and the first speed threshold and the second speed threshold can be speed values used to switch different connection states of the engine, generator, and drive motor. The specific values can be determined according to actual needs and are not specifically limited here.

[0058] S240. Control the first clutch to disengage and the second clutch to close, so that the engine and the generator are connected in series, and control the drive motor to drive the vehicle to move.

[0059] Specifically, if the driving speed of the vehicle does not reach the first speed threshold, it indicates that the vehicle is currently in a low-speed operation state. The extended-range power generation in series can be used to drive the vehicle purely electrically. Therefore, by controlling the first clutch to disengage and the second clutch to engage, the engine and the generator can be connected in series, and the generator and the drive motor can be connected in series. Thus, power can be provided to the drive motor by the engine via the generator, and the vehicle can be driven by the drive motor via the second clutch in the closed state to make the vehicle move.

[0060] S250. Determine the opening and closing states of the first clutch and the second clutch according to the engine torque and the engine speed to drive the vehicle to move.

[0061] Specifically, if the driving speed of the vehicle reaches the first speed threshold and does not reach the second speed threshold, it indicates that the vehicle is currently in a medium-speed operation state and can enter the parallel mode. However, which parallel mode to enter can be further determined according to the engine torque and the engine speed, that is, to determine the opening and closing states of the first clutch and the second clutch, so that the power can meet the requirements while meeting the economic requirements.

[0062] Based on the above example, the following steps can be used to determine the opening and closing states of the first clutch and the second clutch according to the engine torque and the engine speed to drive the vehicle to move:

[0063] Step 1. Determine the initial economic index of the vehicle according to the engine torque and the engine speed.

[0064] Among them, the initial economic index can be a value calculated from the engine torque and the engine speed and used to measure the economic level. The larger the economic index, the better the economy. When the engine speed remains unchanged, as the engine torque increases, the economic index first increases and then decreases; when the engine torque remains unchanged, as the engine speed increases, the economic index first increases and then decreases.

[0065] Specifically, input the engine torque and the engine speed into a pre-constructed economic model or economic function, and use the output value as the initial economic index of the vehicle.

[0066] It can be understood that the pre-constructed economic model or economic function can be obtained by training or fitting according to the requirements and the historical engine torque and the historical engine speed.

[0067] Step 2. When the initial economic index is less than the preset threshold, determine the opening and closing states of the first clutch and the second clutch according to the engine torque to drive the vehicle to move.

[0068] Among them, the preset threshold can be a value preset for measuring whether the current economic state of the vehicle is normal, and the specific value can be set according to actual needs.

[0069] Specifically, if the initial economic index is less than the preset threshold, it indicates that the engine torque should be adjusted at this time so that the economic index of the vehicle meets the conditions of the preset threshold. Therefore, the opening and closing states of the first clutch and the second clutch can be determined according to the engine torque, so as to adjust the connection mode of the engine, the motor and the drive motor, adjust the engine torque, and improve the economic index so that the economic index of the vehicle meets the conditions of the preset threshold.

[0070] Based on the above example, if the engine torque is greater than the first torque threshold, the opening and closing states of the first clutch and the second clutch can be determined in the following way to drive the vehicle to move:

[0071] When the engine torque is greater than the first torque threshold, control the first clutch to close and the second clutch to close, control the drive motor and the engine to drive the vehicle in parallel to reduce the engine torque through the drive motor; adjust the drive motor, update the engine torque and engine speed, and determine the current economic index of the vehicle according to the updated engine torque and engine speed; when the current economic index is less than the preset threshold, return to execute the step of adjusting the drive motor until the current economic index is not less than the preset threshold.

[0072] Among them, the first torque threshold can be the torque value that triggers the drive motor and the engine to drive the vehicle in parallel, and the specific value can be set according to actual needs, for example: 120 N·m, etc. The updated engine torque can be the torque of the engine after adjusting the opening and closing states of the first clutch and the second clutch. The updated engine speed can be the engine speed after adjusting the opening and closing states of the first clutch and the second clutch. The current economic index can be calculated from the updated engine torque and engine speed and is a value used to measure the current adjusted economic level.

[0073] Specifically, if the engine torque is greater than the first torque threshold, it indicates that the problem of too low economic index is caused by excessive engine torque. The engine torque can be reduced by the assistance of the drive motor. Therefore, control the first clutch to close and the second clutch to close, and control the drive motor and the engine to drive the vehicle in parallel to reduce the engine torque through the drive motor. Furthermore, adjust the drive motor to obtain the new engine torque and engine speed, and calculate the current economic index of the vehicle. If the current economic index is not less than the preset threshold, stop adjusting the drive motor and maintain the current state. If the current economic index is less than the preset threshold, it is necessary to continue adjusting the drive motor and calculate the current economic index for comparison to enable the engine to operate within the economic region, that is, to meet the conditions of the economic threshold.

[0074] Based on the above example, if the engine torque is less than the second torque threshold, the opening and closing states of the first clutch and the second clutch can be determined in the following manner to drive the vehicle:

[0075] When the engine torque is less than the second torque threshold, control the first clutch to close and the second clutch to open, and the generator generates electricity. Control the engine to drive the vehicle to increase the engine torque through the generator; adjust the generator, update the engine torque and engine speed, and determine the current economic index of the vehicle according to the updated engine torque and engine speed; when the current economic index is less than the preset threshold, return to execute the step of adjusting the generator until the current economic index is not less than the preset threshold.

[0076] Among them, the second torque threshold can be the torque value that triggers the engine to drive the vehicle and the generator to increase the engine torque. The specific value can be set according to actual needs, for example: 60 N·m, etc. The second torque threshold is not greater than the first torque threshold.

[0077] Specifically, if the engine torque is less than the second torque threshold, it indicates that the problem of too low economic index is caused by too small engine torque. The engine torque can be increased by using the generator. Therefore, control the first clutch to close and the second clutch to open, control the engine to drive the vehicle, and increase the engine torque by the generator generating electricity. Furthermore, adjust the generator to obtain the new engine torque and engine speed, and calculate the current economic index of the vehicle. If the current economic index is not less than the preset threshold, stop adjusting the generator and maintain the current state. If the current economic index is less than the preset threshold, it is necessary to continue adjusting the generator and calculate the current economic index for comparison to enable the engine to operate within the economic region, that is, to meet the conditions of the economic threshold.

[0078] It should be noted that if the engine torque is not greater than the first torque threshold and not less than the second torque threshold, it indicates that the engine torque at this time meets the requirements and no adjustment is needed. Just maintain the current engine torque, as well as the opening and closing states of the first clutch and the second clutch.

[0079] S260. Control the first clutch to close and the second clutch to open, control the generator not to generate electricity, and control the engine to drive the vehicle to move.

[0080] Specifically, if the driving speed of the vehicle reaches the second speed threshold, it indicates that the vehicle is currently in a high-speed running state. The engine can output power to directly drive the vehicle. Therefore, control the first clutch to close and the second clutch to open, and control the generator not to generate electricity. The engine can directly provide power to drive the vehicle to make it move.

[0081] Optionally, the opening and closing states of the first clutch and the second clutch can also be changed to charge the power battery of the vehicle while the vehicle is moving. Specifically, it can be:

[0082] When the current power of the vehicle's power battery is lower than the preset power, control the first clutch to close and the second clutch to close, control the drive motor and the engine to drive the vehicle in parallel; control the generator to charge the vehicle's power battery.

[0083] Among them, the current power can be the state of charge of the vehicle's power battery obtained by the in-vehicle system in the vehicle, that is, the power value. The preset power can be the value for determining whether the power battery is lower than the power balance.

[0084] Specifically, if the current power of the vehicle's power battery is lower than the preset power, it indicates that the power battery needs to be charged. In this case, the first clutch can be controlled to close and the second clutch to close to drive the vehicle in parallel through the drive motor and the engine. And control the generator to output electric energy to the power battery to charge the power battery.

[0085] It should be noted that through the above embodiments, the power consumption and fuel consumption can be effectively reduced. Through experimental verification, the pure-electric driving power consumption is reduced from 23 kWh / 100 km to 20.5 kWh / 100 km, and the fuel consumption is reduced from 7.1 L / 100 km to 5.9 L / 100 km.

[0086] The driving control method of the range-extended electric vehicle provided by the embodiment of the present application determines the relationship between the driving speed of the vehicle and the first speed threshold and the second speed threshold. When the driving speed of the vehicle does not reach the first speed threshold, the first clutch is controlled to disengage and the second clutch is controlled to engage, so that the engine and the generator are connected in series, and the drive motor is controlled to drive the vehicle. When the driving speed of the vehicle reaches the first speed threshold and does not reach the second speed threshold, the opening and closing states of the first clutch and the second clutch are determined according to the engine torque and the engine speed to drive the vehicle. When the driving speed of the vehicle reaches the second speed threshold, the first clutch is controlled to engage and the second clutch is controlled to disengage, the generator is controlled not to generate electricity, and the engine is controlled to drive the vehicle, thereby realizing the adjustment of the connection modes of the engine, the generator, and the drive motor according to the driving speed of the vehicle, and further adjusting in combination with the engine torque and the engine speed, reducing the fuel consumption and power consumption of the vehicle, and improving the energy utilization rate.

[0087] Figure 4 It is a schematic structural diagram of an electronic device provided by the embodiment of the present application. As Figure 4 shown, the electronic device 400 includes one or more processors 401 and a memory 402.

[0088] The processor 401 can be a central processing unit (CPU) or other forms of processing units with data processing capabilities and / or instruction execution capabilities, and can control other components in the electronic device 400 to perform desired functions.

[0089] The memory 402 can include one or more computer program products, and the computer program products can include various forms of computer-readable storage media, such as volatile memory and / or non-volatile memory. The volatile memory can include, for example, random access memory (RAM) and / or cache memory, etc. The non-volatile memory can include, for example, read-only memory (ROM), hard disk, flash memory, etc. One or more computer program instructions can be stored on the computer-readable storage media, and the processor 401 can run the program instructions to implement the driving control method of the range-extended electric vehicle in any embodiment of the present application described above and / or other desired functions. Various contents such as initial external parameters and thresholds can also be stored in the computer-readable storage media.

[0090] In one example, the electronic device 400 may further include: an input device 403 and an output device 404, and these components are interconnected through a bus system and / or other forms of connection mechanisms (not shown). The input device 403 may include, for example, a keyboard, a mouse, and so on. The output device 404 may output various information to the outside, including warning prompt information, braking force, and so on. The output device 404 may include, for example, a display, a speaker, a printer, and a communication network and its connected remote output devices, and so on.

[0091] Of course, for simplicity, Figure 4 only some of the components related to the present application in the electronic device 400 are shown, and components such as a bus, an input / output interface, and so on are omitted. In addition, according to specific application scenarios, the electronic device 400 may further include any other appropriate components.

[0092] In addition to the above methods and devices, an embodiment of the present application may also be a computer program product, which includes computer program instructions that, when run by a processor, cause the processor to execute the steps of the drive control method of the range-extended electric vehicle provided in any embodiment of the present application.

[0093] The computer program product may be written in any combination of one or more programming languages to write program code for performing the operations of the embodiments of the present application. The programming languages include object-oriented programming languages such as Java, C++, etc., and also include conventional procedural programming languages such as the "C" language or similar programming languages. The program code may be executed entirely on the user computing device, partially on the user device, executed as an independent software package, partially on the user computing device and partially on a remote computing device, or entirely on a remote computing device or server.

[0094] Furthermore, an embodiment of the present application may also be a computer-readable storage medium, on which computer program instructions are stored, and the computer program instructions, when run by a processor, cause the processor to execute the steps of the drive control method of the range-extended electric vehicle provided in any embodiment of the present application.

[0095] The computer-readable storage medium may adopt any combination of one or more readable media. The readable media may be a readable signal medium or a readable storage medium. The readable storage medium may include, for example, but is not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the above. More specific examples (a non-exhaustive list) of the readable storage medium include: an electrical connection having one or more wires, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above.

[0096] It should be noted that the terms used in this application are only for describing specific embodiments and do not limit the scope of this application. As shown in the specification and claims of this application, unless the context clearly indicates otherwise, words such as "a", "an", "one", and / or "the" are not specifically singular and may also include the plural. The term "comprising", "including", or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, or device including a series of elements not only includes those elements but also includes other elements not explicitly listed, or further includes elements inherent to such a process, method, or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, or device including the said element.

[0097] It should also be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to this application. Unless otherwise clearly specified and defined, terms such as "installed", "connected", "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0098] In this article, specific examples are used to elaborate on the principles and implementation manners of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application. The above is only the preferred implementation manner of the present application. It should be noted that due to the limitation of literal expression, and objectively there are infinite specific structures. For those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements, refinements or changes can also be made, or the above technical features can be combined in an appropriate manner; these improvements, refinements, changes or combinations, or directly applying the concept and technical solution of the invention to other occasions without improvement, shall all be regarded as the protection scope of the present application.

Claims

1. A driving control method for a range-extended electric vehicle, characterized in that Applied to a drive control device, the drive control device includes: a generator, a drive motor, an engine, a first clutch, and a second clutch. Wherein, the engine is connected to the generator via a generator gear set, and the engine is connected to the drive motor via the first clutch, an engine gear set, a drive motor gear set, and the second clutch; The method includes: When the engine is not fully started, control the second clutch to close, control the vehicle's power battery to supply power to the drive motor, and control the drive motor to drive the vehicle to move; Otherwise, determine the opening and closing states of the first clutch and the second clutch according to the vehicle's driving speed, the engine torque of the engine, and the engine speed of the engine to drive the vehicle to move; The determining the opening and closing states of the first clutch and the second clutch according to the vehicle's driving speed, the engine torque of the engine, and the engine speed of the engine to drive the vehicle to move includes: When the vehicle's driving speed does not reach the first speed threshold, control the first clutch to disengage and the second clutch to engage, so that the engine and the generator are in series, and control the drive motor to drive the vehicle to move; When the vehicle's driving speed reaches the first speed threshold and does not reach the second speed threshold, determine the opening and closing states of the first clutch and the second clutch according to the engine torque and the engine speed to drive the vehicle to move; When the vehicle's driving speed reaches the second speed threshold, control the first clutch to engage and the second clutch to disengage, control the generator not to generate electricity, and control the engine to drive the vehicle to move.

2. The method according to claim 1, characterized in that The determining the opening and closing states of the first clutch and the second clutch according to the engine torque and the engine speed to drive the vehicle to move includes: Determine the initial economic index of the vehicle according to the engine torque and the engine speed; The initial economic index is calculated from the engine torque and the engine speed and is a value used to measure the economic level; When the initial economic index is less than a preset threshold, determine the opening and closing states of the first clutch and the second clutch according to the engine torque to drive the vehicle to move.

3. The method according to claim 2, wherein The determining the opening and closing states of the first clutch and the second clutch according to the engine torque to drive the vehicle to move includes: When the engine torque is greater than the first torque threshold, control the first clutch to engage and the second clutch to engage, and control the drive motor and the engine to drive the vehicle in parallel to reduce the engine torque through the drive motor; Adjust the driving motor, update the engine torque and the engine speed, and determine the current economic index of the vehicle according to the updated engine torque and engine speed; In the case that the current economic index is less than the preset threshold, return to execute the step of adjusting the driving motor until the current economic index is not less than the preset threshold.

4. The method according to claim 2, wherein The determining the opening and closing states of the first clutch and the second clutch according to the engine torque to drive the vehicle to move includes: In the case that the engine torque is less than the second torque threshold, control the first clutch to close, the second clutch to open, control the generator to generate electricity, and control the engine to drive the vehicle to move so as to increase the engine torque through the generator; the second torque threshold is not greater than the first torque threshold; Adjust the generator, update the engine torque and the engine speed, and determine the current economic index of the vehicle according to the updated engine torque and engine speed; In the case that the current economic index is less than the preset threshold, return to execute the step of adjusting the generator until the current economic index is not less than the preset threshold.

5. The method according to claim 1, characterized in that, Further included are: In the case that the current power of the power battery of the vehicle is lower than the preset power, control the first clutch to close, the second clutch to close, and control the driving motor and the engine to drive the vehicle in parallel; Control the generator to charge the power battery of the vehicle.

6. The method according to claim 1, wherein Further included are: In the case that the wheel torque of the vehicle is greater than the preset torque and / or the current opening of the accelerator pedal of the vehicle is greater than the preset opening, control the first clutch to close, the second clutch to close, and control the driving motor and the engine to drive the vehicle in parallel.

7. The method according to claim 1, characterized in that Further included are: In the case that the opening and closing state of the first clutch is switched and / or the opening and closing state of the second clutch is switched, control the engine torque gradient of the engine to change.

8. An electronic device, characterized in that, The electronic device includes: A processor and a memory; The processor is configured to execute the steps of the driving control method of the range-extended electric vehicle according to any one of claims 1 to 7 by calling the program or instruction stored in the memory.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a program or instruction, and the program or instruction causes a computer to execute the steps of the driving control method of the range-extended electric vehicle according to any one of claims 1 to 7.

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