Locking control method, device and equipment for hybrid power vehicle and medium

Abstract

The invention discloses a locking control method, device and equipment for a hybrid electric vehicle and a medium, and relates to the field of hybrid electric vehicle control, and the locking control method for the hybrid electric vehicle comprises the steps that whether the speed of a current vehicle is larger than a preset threshold value or not is judged; if yes, judging whether the battery remaining capacity of the current vehicle is larger than a preset remaining capacity or not, if yes, executing locking, and if not, controlling a generator of the current vehicle to enter a power generation state; and if not, controlling the running mode of the current vehicle according to the power demand of the current vehicle. The locking mechanism is controlled by comprehensively judging the vehicle speed and the remaining electric quantity of the battery, on one hand, when the electric quantity of the battery is sufficient, energy loss caused when engine power is converted into electric energy through the generator is avoided, internal friction is thoroughly eliminated, and on the other hand, when the electric quantity of the battery is insufficient, the generator is controlled to enter a power generation state to charge the battery; and the endurance of the whole vehicle is prevented from being influenced by over-low electric quantity.

Description

Technical Field

[0001] The present application relates to the field of hybrid vehicle control, and in particular to a locking control method, device, equipment and medium for hybrid vehicles. Background Art

[0002] To mitigate the internal friction and increased fuel consumption caused by the power split (PS) hybrid coupling system during high-speed driving, hybrid vehicles currently on the market often incorporate a sun gear brake within the PS hybrid coupling. However, these control strategies remain relatively simple, typically using vehicle speed as the threshold for brake lock. This control approach has two major drawbacks: First, when the state of charge (SOC) falls below a set limit, the generator cannot replenish the battery during high-speed driving. However, the vehicle's electrical equipment continues to consume battery power, creating the risk of battery imbalance. Especially during extended high-speed driving with a low battery charge, the vehicle may frequently restart the engine to recharge due to insufficient power, potentially increasing fuel consumption. Second, controlling the lock mechanism based solely on a single speed threshold cannot fully eliminate internal friction. Vehicle speed is only one factor influencing internal friction, while actual driving conditions are complex and variable, with numerous factors contributing to internal friction, such as engine speed, load, and vehicle acceleration. When the vehicle speed reaches near the threshold, if the influence of other operating factors is not comprehensively considered, a simple locking operation may not enable the power system to reach the optimal working state, and the internal friction problem still exists, thereby affecting the vehicle's fuel economy and power performance. Summary of the Invention

[0003] The present application provides a locking control method, device, equipment and medium for a hybrid vehicle, which can solve the technical problem in the prior art that the locking control method for a hybrid vehicle is relatively simple and thus affects the driving performance.

[0004] In a first aspect, an embodiment of the present application provides a locking control method for a hybrid vehicle, the locking control method for a hybrid vehicle comprising: Determine whether the current vehicle speed is greater than the preset threshold: If so, it is determined whether the remaining battery power of the current vehicle is greater than the preset remaining power. If so, locking is performed; if not, the generator of the current vehicle is controlled to enter the power generation state; If not, the driving mode of the current vehicle is controlled according to the power demand of the current vehicle.

[0005] In combination with the first aspect, in one embodiment, performing locking includes: monitoring a generator speed of the current vehicle within a first preset time range; Determine whether the generator speed monitored within the first preset time range is less than a preset fluctuation range: If so, lock is performed; If not, monitor whether the generator speed of the current vehicle is equal to zero within the second preset time range: - If yes, lock it; - If not, control the engine speed until the engine speed is equal to zero, and then perform lock-up.

[0006] In combination with the first aspect, in one embodiment, performing locking includes: monitoring the generator speed of the current vehicle and the speed of the current vehicle within a first preset time range; Determine whether the generator speed monitored within the first preset time range is less than a preset fluctuation amplitude, and whether the current vehicle speed is within the buffer range: If the generator speed is less than the preset fluctuation range and the current vehicle speed is within the buffer range, or if the generator speed is less than the preset fluctuation range and the current vehicle speed is not within the buffer range, or if the generator speed is greater than the preset fluctuation range and the current vehicle speed is not within the buffer range, then locking is performed; If the generator speed is greater than the preset fluctuation amplitude and the current vehicle speed is within the buffer range, the generator speed of the current vehicle is monitored to see if it is equal to zero within the second preset time range. If so, locking is performed; if not, the engine speed is controlled until the engine speed is equal to zero, and then locking is performed.

[0007] In combination with the first aspect, in one embodiment, after the locking is performed, the method further includes: Monitor the current vehicle speed: If the current vehicle speed is less than the preset threshold, the locking is stopped; If the current vehicle speed is greater than the preset threshold, the locking will continue.

[0008] In conjunction with the first aspect, in one embodiment, before determining whether the current vehicle speed is greater than a preset threshold, the process further includes: A vehicle speed signal is collected by a vehicle speed sensor, wherein the vehicle speed signal includes the current vehicle speed; A third-order low-pass filter is used to filter the vehicle speed signal.

[0009] In conjunction with the first aspect, in one embodiment, controlling the driving mode of the current vehicle according to the current power demand of the vehicle includes: Determine the current vehicle's power demand based on the current vehicle's accelerator pedal opening: If the accelerator pedal opening of the current vehicle is less than the preset opening, the current vehicle is controlled to drive in pure electric mode; If the accelerator pedal opening of the current vehicle is greater than a preset opening, the current vehicle is controlled to drive in hybrid mode.

[0010] In a second aspect, an embodiment of the present application provides a locking control device for a hybrid vehicle, the locking control device for a hybrid vehicle comprising: a determination module, configured to determine whether the current vehicle speed is greater than a preset threshold, and if so, to drive the first execution module to operate; if not, to drive the second execution module to operate; A first execution module is configured to determine whether the remaining battery power of the current vehicle is greater than a preset power level, and if so, to execute locking; if not, to control the generator of the current vehicle to enter a power generation state; The second execution module is used to control the driving mode of the current vehicle according to the power demand of the current vehicle.

[0011] In conjunction with the second aspect, in one embodiment, before determining whether the current vehicle speed is greater than a preset threshold, the process further includes: A vehicle speed signal is collected by a vehicle speed sensor, wherein the vehicle speed signal includes the current vehicle speed; A third-order low-pass filter is used to filter the vehicle speed signal.

[0012] In a third aspect, an embodiment of the present application provides a locking control device for a hybrid vehicle, wherein the locking control device for a hybrid vehicle comprises a processor, a memory, and a locking control program for a hybrid vehicle stored on the memory and executable by the processor, wherein when the locking control program for a hybrid vehicle is executed by the processor, the steps of the locking control method for a hybrid vehicle as described in any one of the above embodiments are implemented.

[0013] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, on which a locking control program for a hybrid vehicle is stored, wherein when the locking control program for a hybrid vehicle is executed by a processor, the steps of the locking control method for a hybrid vehicle as described in any one of the above embodiments are implemented.

[0014] The beneficial effects of the technical solutions provided in the embodiments of the present application include: The embodiment of the present application controls the locking mechanism by comprehensively judging the vehicle speed and the remaining battery power, thereby solving the power management problem caused by the single vehicle speed as the threshold in the prior art. When the vehicle speed exceeds the preset value, if the battery power is sufficient, the locking operation is performed, effectively avoiding the energy loss when the engine power is converted into electrical energy through the generator, and the situation where the generator reverses and consumes battery energy, thereby completely eliminating internal friction, saving energy, and reducing the fuel consumption of the entire vehicle. If the battery power is insufficient, the generator is controlled to enter the power generation state to charge the battery to avoid the vehicle's endurance being affected by low power. When the vehicle speed does not reach the preset threshold, the vehicle can flexibly select the driving mode according to the current power demand, ensure efficient operation under various working conditions, and extend the battery life. The embodiment of the present application optimizes the locking control method through reasonable control logic, extends battery life, reduces maintenance frequency, and reduces the long-term use cost of hybrid vehicles. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a PS hybrid coupling device including a sun gear brake; Figure 2 This is a simplified structural diagram of the planetary gear structure; Figure 3 This is a flow chart of an embodiment of a locking control method for a hybrid vehicle according to the present application; Figure 4 For this application Figure 3 Detailed flow chart of step S4; Figure 5 This is a functional module diagram of an embodiment of a locking control device for a hybrid vehicle according to the present application. DETAILED DESCRIPTION

[0016] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0017] In order to eliminate the problem of increased fuel consumption caused by internal friction in the PS (Power Split) hybrid coupling device when driving at high speeds, hybrid vehicles currently on the market are usually equipped with a sun gear brake in the PS hybrid coupling device. Figure 1 It is a PS hybrid coupling device including a sun gear brake. Figure 1As shown, when the vehicle speed reaches a certain limit and internal friction needs to be eliminated, the locking mechanism is triggered, forming a rigid connection between the sun gear and the planetary carrier. This changes the power transmission path and the engine enters direct drive mode. The engine output power is transmitted directly through the planetary carrier and sun gear, eliminating relative motion and reducing energy loss. The brake constrains the generator rotor, returning the generator speed and torque to zero, interrupting the power transmission from the engine to the generator and preventing engine power from being consumed by the generator. Since the generator is stationary, there is no energy conversion and transmission loss, thus eliminating internal friction. This mechanically restricts component movement and reduces energy conversion and loss.

[0018] Figure 2 This is a schematic diagram of the planetary gear structure. Figure 2 As shown in the figure, a planetary gear system primarily consists of a sun gear, planet gears, a planet carrier, and a ring gear. These components work together to transmit, distribute, and convert power. Planetary gear systems are widely used in automotive automatic transmissions and hybrid systems to achieve different gear ratios and power mode switching.

[0019] The speed relationship of the planetary gear should satisfy:

[0020] in, represents the speed of the sun gear, Indicates the rotational speed of the planet carrier, Indicates the speed of the ring gear, It represents the characteristic parameter of the planetary gear set, that is, the ratio of the number of ring gear teeth to the number of sun gear teeth.

[0021] The torque relationship of the planetary gear should satisfy:

[0022]

[0023] in, represents the torque of the sun gear, represents the torque of the planet carrier, represents the torque of the ring gear, Represents the characteristic parameters of the planetary gear.

[0024]

[0025] in, Indicates the number of teeth on the inner ring gear. Indicates the number of sun gear teeth.

[0026] When the vehicle speed reaches a certain limit and internal friction is eliminated, the locking mechanism is triggered, locking the sun gear. The engine power is then transmitted directly to the wheels through the planetary carrier and ring gear. This locking mechanism prevents energy loss when the engine power is converted into electricity through the generator, and prevents reverse rotation of the generator that consumes battery energy.

[0027] However, using vehicle speed alone as the basis for controlling the locking mechanism doesn't fully reflect the true operating state of the powertrain. For example, when the vehicle speed reaches a threshold, locking may occur at a different time due to changes in engine speed or load, resulting in energy loss before locking. Alternatively, when the battery charge is low, the generator is required to maintain charge balance even at high speeds. In this case, the locking mechanism cannot simply lock based on vehicle speed, as doing so would cause the battery charge to drop further, impacting normal vehicle operation.

[0028] The present application provides a locking control method, device, equipment and medium for a hybrid vehicle, which can solve the technical problem in the prior art that the locking control method for a hybrid vehicle is relatively simple and thus affects the driving performance.

[0029] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0030] In a first aspect, an embodiment of the present application provides a locking control method for a hybrid vehicle.

[0031] In one embodiment, referring to Figure 3 , Figure 3 This is a flow chart of an embodiment of the locking control method for hybrid vehicles of the present application. Figure 3 As shown, the locking control method for a hybrid vehicle includes: S1: Determine whether the current vehicle speed is greater than a preset threshold. If so, go to S2; if not, go to S3; S2: Determine whether the current remaining battery power of the vehicle is greater than the preset remaining power. If so, go to S4; if not, go to S5; S3: Control the driving mode of the current vehicle according to the power demand of the current vehicle.

[0032] S4: execute locking; S5: Control the generator of the current vehicle to enter the power generation state.

[0033] Specifically, the preset threshold value may range from 75 km / h to 80 km / h, and the preset margin may range from 15% to 25%.

[0034] During driving, the hybrid control unit (HCU) monitors vehicle speed in real time. When the speed reaches or exceeds a preset threshold, the HCU determines that the vehicle is in high-speed driving mode and controls the engine to direct drive mode to reduce internal friction. When the speed falls below the preset threshold, the vehicle may be in urban driving or low-speed driving, requiring flexible adjustment of the driving mode based on power requirements. By setting the speed threshold, it can be used to preliminarily screen out operating conditions that may require locking.

[0035] The HCU further checks the remaining battery charge. If the remaining battery charge exceeds a preset value, it indicates sufficient battery power and the engine can be locked, entering direct drive mode. If the remaining battery charge does not exceed the preset value, it indicates insufficient battery power and requires the generator to continue charging to maintain the charge balance and prevent the vehicle from malfunctioning due to low battery.

[0036] The embodiments of the present application comprehensively consider vehicle speed and battery power to ensure that hybrid vehicles can operate efficiently under various driving conditions, thereby improving power performance and fuel economy.

[0037] Figure 4 For this application Figure 3 Detailed flow chart of step S4 in . Figure 4 As shown, for the above step S4, the specific execution process of one embodiment is: S401: Monitoring the current vehicle generator speed within a first preset time range; S402: Determine whether the generator speed monitored within the first preset time range is less than a preset fluctuation amplitude. If so, go to S403; if not, go to S404; S403: Execute locking; S404: monitoring whether the generator speed of the current vehicle is equal to zero within the second preset time range, if so, proceed to S405, if not, proceed to S406; S405: Execute locking; S406: Control the engine speed until the engine speed is equal to zero, and then perform locking.

[0038] Specifically, when the vehicle speed is greater than a preset threshold and the remaining battery power is greater than a preset margin, a dynamic buffer mechanism is introduced. The HCU will not respond immediately to changes in vehicle speed, but will wait for a period of time to confirm whether the change in vehicle speed is stable. This dynamic buffer control helps reduce unnecessary locking mechanism switching caused by short-term fluctuations in vehicle speed.

[0039] In one specific embodiment, a preset threshold of 75 km / h can be set, with a first preset time range of 0.2 seconds, a second preset time range of 0.3 seconds, and a preset fluctuation amplitude of 10 rpm. When the vehicle speed first reaches 75 km / h, the HCU issues a pre-locking signal for the locking mechanism based on the actual generator speed. The HCU continuously monitors the generator speed for fluctuations within the limit of less than 10 rpm within 0.2 seconds, indicating that the generator speed is stable and the locking operation can be performed safely. If the generator speed fluctuation amplitude within 0.2 seconds is greater than or equal to 10 rpm, the HCU further monitors whether the generator speed is zero within 0.3 seconds. If the generator speed is zero within 0.3 seconds, the motor is stationary or non-driven, meaning it is not required to participate in power output or power generation. Executing the locking action at this time prevents the generator's mechanical transmission components from idling or wasting engine power, thereby reducing internal friction and improving overall powertrain efficiency. If the generator speed is not equal to zero, it means that the generator is still running and the engine speed needs to be further adjusted. After the engine speed is equal to zero, the HCU sends a signal to activate the locking mechanism, fix the sun gear, and put the engine into direct drive mode.

[0040] Regarding the above step S4, the specific execution process of another embodiment is as follows: S411: monitoring the generator speed of the current vehicle and the current vehicle speed within a first preset time range; S412: Determine whether the generator speed monitored within the first preset time range is less than a preset fluctuation amplitude, and whether the current vehicle speed is within a buffer range. If the generator speed is less than the preset fluctuation amplitude and the current vehicle speed is within the buffer range, or if the generator speed is less than the preset fluctuation amplitude and the current vehicle speed is not within the buffer range, or if the generator speed is greater than the preset fluctuation amplitude and the current vehicle speed is not within the buffer range, then lock is executed. If the generator speed is greater than the preset fluctuation amplitude and the current vehicle speed is within the buffer range, proceed to S413. S413: monitoring whether the generator speed of the current vehicle is equal to zero within the second preset time range, if so, proceeding to S414, if not, proceeding to S415; S414: Execute locking; S415: The engine speed is controlled until the engine speed is equal to zero, and then locking is performed.

[0041] Specifically, setting a vehicle speed buffer range can further refine the control strategy for the locking mechanism. In one specific embodiment, the buffer range can be set between 75 km / h and 80 km / h. By simultaneously monitoring the generator speed and vehicle speed, the vehicle can avoid frequent switching between direct drive mode and hybrid mode, thereby improving vehicle operating stability.

[0042] In the embodiment of the present application, after the locking is performed, the method further includes: S41: Monitor the current vehicle speed. If the current vehicle speed is less than a preset threshold, go to S42. If the current vehicle speed is greater than the preset threshold, go to S43. S42: Stop locking; S43: Continue locking.

[0043] Specifically, the lock is maintained at high speeds and released at low speeds, so that the vehicle can perform optimally under various driving conditions. By properly controlling the locking operation, unnecessary energy conversion is reduced.

[0044] In the embodiment of the present application, before determining whether the current vehicle speed is greater than a preset threshold, the process further includes: S101: collecting a vehicle speed signal through a vehicle speed sensor, wherein the vehicle speed signal includes the current vehicle speed; S102: Filter the vehicle speed signal using a third-order low-pass filter.

[0045] Specifically, a speed sensor, typically mounted on a vehicle's wheel hub or transmission, monitors the vehicle's speed in real time and converts the speed signal into an electrical signal, which is then transmitted to the HCU. This ensures the control unit can obtain real-time and accurate speed information, providing the foundational data for subsequent speed determination and control strategies. Furthermore, the filter's cutoff frequency is set to 100Hz, and a third-order low-pass filter effectively removes high-frequency noise while retaining low-frequency signals, resulting in a smoother speed signal.

[0046] In the embodiment of the present application, for the above step S3, a specific execution process of an embodiment is as follows: S301: Determine the power demand of the current vehicle based on the current accelerator pedal opening. If the current accelerator pedal opening is less than a preset opening, proceed to S302. If the current accelerator pedal opening is greater than the preset opening, proceed to S303. S302: Control the current vehicle to drive in pure electric mode; S303: Control the current vehicle to drive in hybrid mode.

[0047] Specifically, the preset opening can be 30%. The HCU monitors the accelerator pedal's opening in real time. If the opening is less than the preset opening, indicating low power demand, the HCU controls the vehicle to enter pure electric mode, with the electric motor driving the vehicle to accommodate low power demand conditions. If the opening is greater than the preset opening, indicating high power demand, the HCU controls the vehicle to enter hybrid mode, with the engine and electric motor working together to accommodate high power demand. The vehicle can automatically switch driving modes according to different power demands, balancing fuel economy and power performance.

[0048] In some other embodiments of the present application, the power demand may also be determined by factors such as the vehicle's driving speed or the vehicle's acceleration, which are not limited here.

[0049] The embodiment of the present application controls the locking mechanism by comprehensively judging the vehicle speed and the remaining battery power, thereby solving the power management problem caused by the single vehicle speed as the threshold in the prior art. When the vehicle speed exceeds the preset value, if the battery power is sufficient, the locking operation is performed, effectively avoiding the energy loss when the engine power is converted into electrical energy through the generator, and the situation where the generator reverses and consumes battery energy, thereby completely eliminating internal friction, saving energy, and reducing the fuel consumption of the entire vehicle. If the battery power is insufficient, the generator is controlled to enter the power generation state to charge the battery to avoid the vehicle's endurance being affected by low power. When the vehicle speed does not reach the preset threshold, the vehicle can flexibly select the driving mode according to the current power demand, ensure efficient operation under various working conditions, and extend the battery life. The embodiment of the present application optimizes the locking control method through reasonable control logic, extends battery life, reduces maintenance frequency, and reduces the long-term use cost of hybrid vehicles.

[0050] In a second aspect, an embodiment of the present application further provides a locking control device for a hybrid vehicle.

[0051] In one embodiment, referring to Figure 5 , Figure 5 This is a functional module diagram of an embodiment of a locking control device for a hybrid vehicle of the present application. Figure 5 As shown, the locking control device for a hybrid vehicle includes: In a second aspect, an embodiment of the present application provides a locking control device for a hybrid vehicle, the locking control device for a hybrid vehicle comprising: a determination module, configured to determine whether the current vehicle speed is greater than a preset threshold, and if so, to drive the first execution module to operate; if not, to drive the second execution module to operate; A first execution module is configured to determine whether the remaining battery power of the current vehicle is greater than a preset power level, and if so, to execute locking; if not, to control the generator of the current vehicle to enter a power generation state; The second execution module is used to control the driving mode of the current vehicle according to the power demand of the current vehicle.

[0052] In the embodiment of the present application, before determining whether the current vehicle speed is greater than a preset threshold, the process further includes: A vehicle speed signal is collected by a vehicle speed sensor, wherein the vehicle speed signal includes the current vehicle speed; A third-order low-pass filter is used to filter the vehicle speed signal.

[0053] Among them, the functional implementation of each module in the above-mentioned locking control device for hybrid vehicles corresponds to the various steps in the above-mentioned locking control method embodiment for hybrid vehicles, and their functions and implementation processes are not repeated here one by one.

[0054] In a third aspect, an embodiment of the present application provides a locking control device for a hybrid vehicle, wherein the locking control device for a hybrid vehicle comprises a processor, a memory, and a locking control program for a hybrid vehicle stored on the memory and executable by the processor, wherein when the locking control program for a hybrid vehicle is executed by the processor, the steps of the locking control method for a hybrid vehicle as described in any one of the above embodiments are implemented.

[0055] The locking control device for a hybrid vehicle may be a device with a data processing function, such as a personal computer (PC), a notebook computer, or a server.

[0056] In an embodiment of the present application, a locking control device for a hybrid vehicle may include a processor, a memory, a communication interface, and a communication bus.

[0057] The communication bus may be of any type and is used to interconnect the processor, memory, and communication interface.

[0058] Communication interfaces include input / output (I / O) interfaces, physical interfaces, and logical interfaces, used to interconnect components within the hybrid vehicle lock control device, as well as interfaces used to interconnect the hybrid vehicle lock control device with other devices (such as other computing devices or user devices). Physical interfaces can include Ethernet, fiber optic, and ATM interfaces; user devices can include displays and keyboards.

[0059] The memory can be various types of storage media, such as random access memory (RAM), read-only memory (ROM), non-volatile RAM (NVRAM), flash memory, optical storage, hard disk, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), etc.

[0060] The processor may be a general-purpose processor that can invoke a locking control program for a hybrid vehicle stored in a memory and execute the locking control method for a hybrid vehicle provided in the embodiments of the present application. For example, the general-purpose processor may be a central processing unit (CPU). The method executed when the locking control program for a hybrid vehicle is invoked can be referenced to the various embodiments of the locking control method for a hybrid vehicle provided in the present application and will not be further described here.

[0061] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, on which a locking control program for a hybrid vehicle is stored, wherein when the locking control program for a hybrid vehicle is executed by a processor, the steps of the locking control method for a hybrid vehicle as described in any one of the above embodiments are implemented.

[0062] The computer-readable storage medium of the present application stores a locking control program for a hybrid vehicle, wherein when the locking control program for a hybrid vehicle is executed by a processor, the steps of the locking control method for a hybrid vehicle as described above are implemented.

[0063] Among them, the method implemented when the locking control program for a hybrid vehicle is executed can refer to the various embodiments of the locking control method for a hybrid vehicle in this application, and will not be repeated here.

[0064] It should be noted that the serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0065] The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices. The terms "first", "second" and "third" are used to distinguish different objects, etc., and do not represent a sequence, nor do they limit the "first", "second" and "third" to different types.

[0066] In the description of the embodiments of this application, the words "exemplary," "for example," or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary," "for example," or "for example" in the embodiments of this application should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary," "for example," or "for example" is intended to present the relevant concepts in a concrete manner.

[0067] In the description of the embodiments of the present application, unless otherwise specified, “ / ” means or, for example, A / B can mean A or B; “and / or” in the text is merely a description of the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, “multiple” refers to two or more than two.

[0068] In some processes described in the embodiments of the present application, multiple operations or steps are included that appear in a specific order. However, it should be understood that these operations or steps may not be performed in the order in which they appear in the embodiments of the present application or may be performed in parallel. The sequence numbers of the operations are only used to distinguish between different operations, and the sequence numbers themselves do not represent any order of execution. In addition, these processes may include more or fewer operations, and these operations or steps may be performed in sequence or in parallel, and these operations or steps may be combined.

[0069] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus the necessary general hardware platform. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, or the part that contributes to the existing technology, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above and includes a number of instructions for enabling a terminal device to execute the methods described in each embodiment of this application.

[0070] The above are only preferred embodiments of the present application and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A locking control method for a hybrid vehicle, characterized in that: The locking control method for a hybrid vehicle includes: Determine whether the current vehicle speed is greater than the preset threshold: If so, it is determined whether the remaining battery power of the current vehicle is greater than the preset remaining power. If so, locking is performed; if not, the generator of the current vehicle is controlled to enter the power generation state; If not, the driving mode of the current vehicle is controlled according to the power demand of the current vehicle.

2. The locking control method for a hybrid vehicle according to claim 1, characterized in that: The execution locking includes: monitoring a generator speed of the current vehicle within a first preset time range; Determine whether the generator speed monitored within the first preset time range is less than a preset fluctuation range: If so, lock is performed; If not, monitor whether the generator speed of the current vehicle is equal to zero within the second preset time range: - If yes, lock it; - If not, control the engine speed until the engine speed is equal to zero, and then perform lock-up.

3. The locking control method for a hybrid vehicle according to claim 1, characterized in that: The execution locking includes: monitoring the generator speed of the current vehicle and the speed of the current vehicle within a first preset time range; Determine whether the generator speed monitored within the first preset time range is less than a preset fluctuation amplitude, and whether the current vehicle speed is within the buffer range: If the generator speed is less than the preset fluctuation range and the current vehicle speed is within the buffer range, or if the generator speed is less than the preset fluctuation range and the current vehicle speed is not within the buffer range, or if the generator speed is greater than the preset fluctuation range and the current vehicle speed is not within the buffer range, then locking is performed; If the generator speed is greater than the preset fluctuation amplitude and the current vehicle speed is within the buffer range, the generator speed of the current vehicle is monitored to see if it is equal to zero within the second preset time range. If so, locking is performed; if not, the engine speed is controlled until the engine speed is equal to zero, and then locking is performed.

4. The locking control method for a hybrid vehicle according to claim 1, characterized in that: After the locking is performed, the method further includes: Monitor the current vehicle speed: If the current vehicle speed is less than the preset threshold, the locking is stopped; If the current vehicle speed is greater than the preset threshold, the locking will continue.

5. The locking control method for a hybrid vehicle according to claim 1, characterized in that: Before determining whether the current vehicle speed is greater than a preset threshold, the method further includes: A vehicle speed signal is collected by a vehicle speed sensor, wherein the vehicle speed signal includes the current vehicle speed; A third-order low-pass filter is used to filter the vehicle speed signal.

6. The locking control method for a hybrid vehicle according to claim 1, characterized in that: The controlling the driving mode of the current vehicle according to the power demand of the current vehicle includes: Determine the current vehicle's power demand based on the current vehicle's accelerator pedal opening: If the accelerator pedal opening of the current vehicle is less than the preset opening, the current vehicle is controlled to drive in pure electric mode; If the accelerator pedal opening of the current vehicle is greater than a preset opening, the current vehicle is controlled to drive in hybrid mode.

7. A locking control device for a hybrid vehicle, characterized in that: The locking control device for a hybrid vehicle includes: a determination module, configured to determine whether the current vehicle speed is greater than a preset threshold, and if so, to drive the first execution module to operate; if not, to drive the second execution module to operate; A first execution module is configured to determine whether the remaining battery power of the current vehicle is greater than a preset power level, and if so, to execute locking; if not, to control the generator of the current vehicle to enter a power generation state; The second execution module is used to control the driving mode of the current vehicle according to the power demand of the current vehicle.

8. The lock control device for a hybrid vehicle according to claim 7, wherein: Before determining whether the current vehicle speed is greater than a preset threshold, the method further includes: A vehicle speed signal is collected by a vehicle speed sensor, wherein the vehicle speed signal includes the current vehicle speed; A third-order low-pass filter is used to filter the vehicle speed signal.

9. A locking control device for a hybrid vehicle, characterized in that: The locking control device for a hybrid vehicle includes a processor, a memory, and a locking control program for a hybrid vehicle stored on the memory and executable by the processor, wherein when the locking control program for a hybrid vehicle is executed by the processor, the steps of the locking control method for a hybrid vehicle as described in any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a locking control program for a hybrid vehicle, wherein when the locking control program for a hybrid vehicle is executed by a processor, the steps of the locking control method for a hybrid vehicle according to any one of claims 1 to 7 are implemented.

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