Engine stop control method, device, and electronic device

Abstract

This application relates to an engine shutdown control method, apparatus, electronic device, storage medium, and computer program product. The method includes: acquiring vehicle driving information during vehicle operation, and determining whether the vehicle needs to perform an engine shutdown operation based on the driving information; if an engine shutdown operation is required, determining a powertrain control strategy for the vehicle based on the driving information, and controlling the vehicle's power components according to the powertrain control strategy; after controlling the vehicle's power components according to the powertrain control strategy, if no engine start signal is received, cutting off the fuel supply to the vehicle's engine. This method can reduce abnormal vibrations caused by engine shutdown.

Description

Technical Field

[0001] This application relates to the field of automotive technology, and in particular to an engine shutdown control method, device, electronic equipment, storage medium, and computer program product. Background Technology

[0002] With the development of automotive technology, there are now many hybrid power configurations and complex control strategies. During the switching process from hybrid / gasoline to pure electric drive, the engine output torque may decrease, leading to abnormal vibrations and other problems that affect the driver's experience. Therefore, how to control engine shutdown is a pressing issue that needs to be addressed. Currently, there are no good solutions for the abnormal vibrations and other problems that may occur during engine shutdown. Summary of the Invention

[0003] Therefore, it is necessary to provide an engine shutdown control method, device, electronic device, computer-readable storage medium, and computer program product that can reduce abnormal vibrations caused by engine shutdown, in order to address the above-mentioned technical problems.

[0004] In a first aspect, this application provides a method for controlling the shutdown of an engine. The method includes:

[0005] During vehicle operation, the vehicle's driving information is acquired, and based on the driving information, it is determined whether the vehicle needs to perform an engine shutdown operation.

[0006] If an engine shutdown operation is required, a powertrain control strategy for the vehicle is determined based on the vehicle driving information, and the powertrain components of the vehicle are controlled according to the powertrain control strategy.

[0007] After controlling the vehicle's power components according to the aforementioned powertrain control strategy, if no engine start signal is received, the vehicle's engine is shut off. In one embodiment,

[0008] The vehicle's driving information includes engine speed; determining whether the vehicle needs to perform an engine shutdown operation based on the vehicle driving information includes:

[0009] If the engine speed of the vehicle meets the engine speed condition, and the number of engine stop signals received within a preset time period reaches a preset stop count threshold, then it is determined that the vehicle needs to perform an engine stop operation. In one embodiment, the vehicle driving information includes engine speed and accelerator pedal opening signal;

[0010] The step of determining a powertrain control strategy for the vehicle based on the vehicle driving information, and controlling the vehicle's power components according to the powertrain control strategy, includes:

[0011] The engine speed is compared with a preset idle speed to determine the speed difference between the idle speed and the engine speed;

[0012] The trend of torque demand change is determined based on the accelerator pedal opening signal;

[0013] Based on the speed difference and the trend of torque demand, a power structure control strategy for the vehicle is determined, and the power components of the vehicle are controlled according to the power structure control strategy.

[0014] In one embodiment, determining the demand torque change trend based on the accelerator pedal opening signal includes:

[0015] Based on the accelerator pedal opening signal, determine the accelerator pedal signal change rate;

[0016] If the rate of change of the accelerator pedal signal reaches the threshold of the rate of change of the accelerator pedal signal, then the trend of the demand torque change is determined to be an increase in the demand torque.

[0017] If the rate of change of the accelerator pedal signal does not reach the threshold of the rate of change of the accelerator pedal signal, then the trend of the demand torque change is determined to be a decrease in the demand torque.

[0018] In one embodiment, the trend of change in demand torque includes either an increase in demand torque or a decrease in demand torque;

[0019] The step of determining a powertrain control strategy for the vehicle based on the speed difference and the trend of torque demand, and controlling the vehicle's power components according to the powertrain control strategy, includes:

[0020] When the speed difference is greater than a preset speed difference threshold, and the demand torque changes in the direction of increasing demand torque, the engine output torque is reduced, the drive motor output torque is increased, and the clutch is disengaged.

[0021] When the speed difference is greater than a preset speed difference threshold and the demand torque changes in a decreasing trend, the output torque of the engine is controlled to decrease, the speed difference is re-determined, and the process returns to the step of determining the power structure control strategy for the vehicle based on the speed difference and the demand torque change trend.

[0022] When the speed difference is less than or equal to a preset speed difference threshold, and the demand torque changes in a trend of increasing demand torque, the clutch is disengaged and the output torque of the drive motor is increased.

[0023] When the speed difference is less than or equal to a preset speed difference threshold, and the demand torque changes in a decreasing trend, the clutch is disengaged and the motor output torque is reduced.

[0024] In one embodiment, the method further includes:

[0025] During the process of controlling the clutch disengagement, the clutch slip ratio of the clutch is determined;

[0026] If the clutch slip ratio reaches a preset slip ratio threshold, then control of the vehicle's power components is terminated.

[0027] Secondly, this application also provides an engine shutdown control device. The device includes:

[0028] The judgment module is used to acquire the vehicle driving information during vehicle operation and determine whether the vehicle needs to perform an engine shutdown operation based on the vehicle driving information.

[0029] The first control module is used to determine a power structure control strategy for the vehicle based on the vehicle driving information if an engine shutdown operation is required, and to control the power components of the vehicle according to the power structure control strategy.

[0030] The second control module is used to cut off the fuel supply to the vehicle's engine if no engine start signal is received after controlling the vehicle's power components according to the power structure control strategy. Thirdly, this application also provides an electronic device. The electronic device includes a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the steps of the above-described engine shutdown control method.

[0031] Fourthly, this application also provides a computer-readable storage medium. The computer-readable storage medium stores a computer program thereon, which, when executed by a processor, implements the steps of the above-described engine shutdown control method.

[0032] Fifthly, this application also provides a computer program product. The computer program product includes a computer program that, when executed by a processor, implements the steps of the above-described engine shutdown control method.

[0033] The aforementioned engine shutdown control method, device, electronic equipment, storage medium, and computer program product acquire vehicle driving information during vehicle operation and determine whether engine shutdown is required based on this information. If engine shutdown is required, a powertrain control strategy is determined based on the driving information, and the vehicle's power components are controlled according to this strategy. After controlling the power components according to the powertrain control strategy, if no engine start signal is received, the engine fuel is cut off. Specifically, during engine shutdown control, by determining whether engine shutdown is required, and when it is required, a control strategy for controlling the vehicle's power components is determined based on the driving information. After controlling the power components according to the strategy, if no engine start signal is received, the engine fuel is cut off. By controlling the power components first and then cutting off the fuel supply to the engine only when no engine start signal is received, the problem of abnormal vibration can be effectively reduced and the driving experience improved. This is because the fuel supply is not cut off directly when the engine needs to be stopped, but rather after the power components are adjusted accordingly. Attached Figure Description

[0034] Figure 1 This is a diagram illustrating the application environment of an engine shutdown control method in one embodiment.

[0035] Figure 2 This is a flowchart illustrating an engine shutdown control method in one embodiment;

[0036] Figure 3 This is a flowchart illustrating the engine shutdown control method in another embodiment;

[0037] Figure 4 This is a structural block diagram of an engine shutdown control device in one embodiment;

[0038] Figure 5 This is a diagram of the internal structure of an electronic device in one embodiment. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0040] The engine shutdown control method provided in this application can be applied to electronic devices, where the electronic device can refer to a controller on a vehicle. For hybrid electric vehicles, the controller may include a powertrain control unit (HCU), an engine system controller (ECU), and a motor controller (MCU), etc. These different controllers can interact with each other to jointly implement the engine shutdown control method of this application. Specifically, each controller can obtain the detection results from a detection unit on the vehicle and perform engine shutdown control based on the detection results. The detection unit may include a throttle pedal opening sensor, an engine speed sensor, etc.

[0041] In one specific embodiment, during vehicle operation, the controller acquires the vehicle's driving information and determines whether the vehicle needs to perform an engine shutdown operation based on the driving information. If an engine shutdown operation is required, the controller determines a powertrain control strategy for the vehicle based on the driving information and controls the vehicle's power components according to the powertrain control strategy. After controlling the vehicle's power components according to the powertrain control strategy, if no engine start signal is received, the controller performs a fuel cut-off operation on the vehicle's engine.

[0042] In one embodiment, such as Figure 2 As shown, an engine shutdown control method is provided, which is applied to... Figure 1 Taking the controller in the example, the following steps are included.

[0043] Step 202: During vehicle operation, obtain vehicle driving information and determine whether the vehicle needs to perform an engine shutdown operation based on the vehicle driving information.

[0044] Vehicle driving information can be any information related to the vehicle during operation. Specifically, this information may include accelerator pedal opening, engine speed, accelerator pedal frequency, brake pedal opening, brake pedal frequency, vehicle speed, acceleration, and braking deceleration. Executing an engine shutdown operation can refer to controlling the engine to stop.

[0045] Specifically, the controller can acquire information such as the vehicle's engine speed and accelerator pedal opening, and combine this information to determine whether an engine shutdown operation needs to be performed.

[0046] Step 204: If an engine shutdown operation is required, a power structure control strategy for the vehicle is determined based on the vehicle driving information, and the vehicle's power components are controlled according to the power structure control strategy.

[0047] The powertrain control strategy can be a strategy for controlling the vehicle's power components, including the engine, electric motor, and clutch. By coordinating and regulating the engine, electric motor, and clutch during engine shutdown, issues such as torque shocks can be effectively reduced. Similarly, the control of these power components can be related to vehicle driving information. This driving information can be used to determine the powertrain control strategy, allowing the control of the engine, electric motor, and clutch to be tailored to the actual driving conditions, resulting in more precise control and an improved driving experience.

[0048] Step 206: After controlling the vehicle's power components according to the power structure control strategy, if no engine start signal is received, the vehicle's engine will be cut off from fuel.

[0049] In this context, "not receiving an engine start signal" can mean that the controller has not received a signal to start the engine. If the controller still does not receive a signal to start the engine after controlling the vehicle's power components according to the power structure control strategy, it can cut off the fuel supply to the engine.

[0050] In the aforementioned engine shutdown control method, vehicle driving information is acquired during vehicle operation, and based on this information, it is determined whether an engine shutdown operation is required. If an engine shutdown operation is required, a powertrain control strategy is determined based on the driving information, and the vehicle's power components are controlled according to this strategy. After controlling the power components according to the powertrain control strategy, if no engine start signal is received, the engine fuel is cut off. Specifically, during the engine shutdown control process, by determining whether an engine shutdown operation is required, and if so, determining a control strategy for the vehicle's power components based on the driving information, and controlling the power components according to this strategy, if no engine start signal is received, the engine fuel is cut off. By controlling the power components first and then cutting off the fuel supply to the engine only when no engine start signal is received, the problem of abnormal vibration can be effectively reduced and the driving experience improved. This is because the fuel supply is not cut off directly when the engine needs to be stopped, but rather after the power components are adjusted accordingly.

[0051] In one embodiment, the vehicle's driving information includes engine speed; determining whether the vehicle needs to perform an engine shutdown operation based on the vehicle driving information includes: if the vehicle's engine speed meets the engine speed condition, and within a preset time period, the number of shutdowns of the received engine shutdown signals reaches a preset shutdown number threshold, then it is determined that the vehicle needs to perform an engine shutdown operation.

[0052] The engine speed condition refers to a set condition that the engine speed must meet. This condition can be a set engine speed threshold; when the engine speed reaches this threshold, the engine speed condition is considered met. The engine speed threshold can be set based on the idle speed, meaning it can be set to approximately equal to the idle speed. The preset time period is the time allotted for each determination of whether an engine stop operation needs to be performed. Within this preset time period, if the number of received engine stop signals reaches a preset stop count threshold, an engine stop operation is determined to be performed. The preset stop count threshold is a set number of engine stop signals that must be received; this threshold can be 2, 3, or any number of times.

[0053] Specifically, if the controller determines that the engine speed has reached the set engine speed threshold, and if the number of times the engine stop command is received reaches 2 within the set time period, then it can determine to execute the engine stop operation.

[0054] In this embodiment, when the controller determines whether to perform an engine shutdown operation, it will only perform the engine shutdown operation when both the engine speed and the number of times the engine shutdown signal is received have reached the corresponding conditions. This reduces the frequent start-stop conditions of the engine to a certain extent and is beneficial to smoothness.

[0055] In one embodiment, vehicle driving information includes engine speed and accelerator pedal opening signal; based on the vehicle driving information, a powertrain control strategy for the vehicle is determined, and the vehicle's power components are controlled according to the powertrain control strategy, including: comparing the engine speed with a preset idle speed to determine the speed difference between the idle speed and the engine speed; determining the demand torque change trend based on the accelerator pedal opening signal; determining the powertrain control strategy for the vehicle based on the speed difference and the demand torque change trend, and controlling the vehicle's power components according to the powertrain control strategy.

[0056] Idle speed refers to the engine speed when it is idling. In this state, the engine does not output power externally; the purpose of idling is to overcome the engine's internal resistance and keep it from shutting off. The demand torque change trend can be used to describe whether the engine's demand torque is increasing or decreasing. Based on the accelerator pedal opening signal, the rate of change of the accelerator pedal signal can be calculated, and thus, the demand torque change range can be determined by combining this rate of change. Specifically, the speed difference between idle speed and engine speed can be less than or greater than 0, and the demand torque change trend can be increasing or decreasing. Different speed differences and demand torque change trends can be used to match corresponding powertrain control strategies.

[0057] In this embodiment, the controller combines the speed difference and the trend of demand torque changes to determine the corresponding power structure control strategy, thereby controlling the vehicle's power components according to the corresponding power structure control strategy, which can effectively reduce the torque shock caused by the engine torque returning to zero.

[0058] In one embodiment, determining the trend of torque demand variation based on the accelerator pedal opening signal includes:

[0059] Determine the rate of change of the accelerator pedal signal based on the accelerator pedal opening signal;

[0060] If the rate of change of the accelerator pedal signal reaches the threshold of the rate of change of the accelerator pedal signal, then the trend of the demand torque change is determined to be an increase in the demand torque.

[0061] If the rate of change of the accelerator pedal signal does not reach the threshold of the rate of change of the accelerator pedal signal, then the trend of the demand torque change is determined to be a decrease in the demand torque.

[0062] The accelerator pedal opening signal can be used to define the rate of change of the accelerator pedal signal. The threshold value for this rate of change can be a set value used to determine the trend of change in the accelerator pedal signal rate of change. This threshold value can be set to any value, such as 0 or 1. Specifically, if the threshold value is set to 0, then when the rate of change of the accelerator pedal signal is equal to 0, the trend of demand torque change is determined to be an increase in demand torque; when the rate of change of the accelerator pedal signal is less than 0, the trend of demand torque change is determined to be a decrease in demand torque.

[0063] In this embodiment, by setting a threshold for the rate of change of the accelerator pedal signal, the changing trend of the required torque can be accurately determined.

[0064] In one embodiment, the trend of demand torque change includes either an increase in demand torque or a decrease in demand torque;

[0065] Based on the trends in speed difference and required torque changes, a powertrain control strategy for the vehicle is determined, and the vehicle's power components are controlled according to this strategy, including:

[0066] When the speed difference is greater than the preset speed difference threshold, and the demand torque changes in the direction of increasing demand torque, the engine output torque is reduced, the drive motor output torque is increased, and the clutch is disengaged.

[0067] When the speed difference is greater than the preset speed difference threshold and the demand torque changes in a decreasing trend, the engine output torque is reduced, the speed difference is redefined, and the process returns to the step of determining the power structure control strategy for the vehicle based on the speed difference and the demand torque change trend.

[0068] When the speed difference is less than or equal to the preset speed difference threshold, and the demand torque changes in the direction of increasing demand torque, the clutch is disengaged and the output torque of the drive motor is increased.

[0069] When the speed difference is less than or equal to the preset speed difference threshold, and the demand torque changes in a decreasing trend, the clutch is disengaged and the motor output torque is reduced.

[0070] Specifically, when the speed difference is greater than a preset speed difference threshold and the demand torque trend is increasing, the controller can control the engine output torque to decrease, while simultaneously controlling clutch disengagement and increasing drive motor output torque. This compensates for the reduced engine torque and the torque reduction due to increased clutch slippage, ensuring stable wheel-end torque. When the speed difference is greater than the preset speed difference threshold and the demand torque trend is decreasing, the controller can control the engine output torque to decrease while maintaining constant motor torque, redetermine the speed difference, and redetermine the vehicle's powertrain control strategy. When the speed difference is less than or equal to the preset speed difference threshold and the demand torque trend is increasing, the controller can control clutch disengagement and increase motor torque to maintain stable wheel-end torque. When the speed difference is less than or equal to the preset speed difference threshold and the demand torque trend is decreasing, the controller controls clutch disengagement and increases motor torque to maintain stable wheel-end torque. When the speed difference is less than or equal to the preset speed difference threshold and the demand torque trend is decreasing, the controller can execute clutch disengagement and motor torque reduction control to maintain stable wheel-end torque. In this embodiment, the controller maintains stable wheel-end torque by controlling the torque of the engine, clutch, and motor, which can effectively reduce the torque shock caused by the engine torque returning to zero and improve the user experience.

[0071] In one embodiment, the method further includes:

[0072] During the process of controlling clutch disengagement, the clutch slip ratio of the clutch is determined;

[0073] If the clutch slip ratio reaches the preset slip ratio threshold, control of the vehicle's power components will be terminated.

[0074] Specifically, during the clutch disengagement process, the controller can determine the clutch slip ratio. If the clutch slip ratio reaches a clutch slip ratio threshold (which can be set to 1), it indicates that the clutch has been fully disengaged, thus ending control of the vehicle's power components. In this embodiment, control of the vehicle's power components ends when the clutch is fully disengaged.

[0075] In one embodiment, such as Figure 3 The diagram shown is a flowchart of an engine shutdown control method in a specific embodiment:

[0076] Upon receiving an engine stop command, the controller acquires the engine speed and the driver's required torque, compares the engine speed with the idle speed, and determines the trend of the driver's required torque. When the engine speed is higher than the idle speed and the required torque increases, the controller reduces the engine output torque, simultaneously disengaging the clutch and controlling the drive motor to increase its output torque until the clutch is fully disengaged. If there is no engine start signal, the controller performs an engine fuel cut-off operation to allow the engine to stop freely, at which point the required torque is entirely provided by the drive motor. When the engine speed is at the idle speed and the required torque increases, the controller controls the drive motor to increase its output torque while simultaneously disengaging the clutch until the clutch is fully disengaged. If there is no engine start signal, the controller performs an engine fuel cut-off operation to allow the engine to stop freely.

[0077] When the engine speed is higher than the idle speed and the required torque decreases, the engine output is controlled to decrease, while the motor torque is maintained until the engine speed decreases to the idle speed. When the required torque continues to decrease, the clutch is controlled to disengage, and the motor output status is judged according to the clutch slip ratio. The output required torque is kept to decrease steadily until the clutch slip ratio is 1, at which point the clutch is fully disengaged. If there is no engine start signal, the engine fuel cut-off operation is performed to allow the engine to stop freely.

[0078] When the engine speed is at idle speed and the required torque decreases, the clutch is controlled to disengage, and the motor output status is judged according to the clutch slip ratio. The output required torque is kept to decrease steadily until the clutch slip ratio is 1, at which point the clutch is fully disengaged. If there is no engine start signal, the engine fuel cut-off operation is performed to allow the engine to stop freely.

[0079] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0080] Based on the same inventive concept, this application also provides an engine shutdown control device for implementing the engine shutdown control method described above. The solution provided by this device is similar to the solution described in the above method; therefore, the specific limitations of one or more engine shutdown control device embodiments provided below can be found in the limitations of the engine shutdown control method described above, and will not be repeated here.

[0081] In one embodiment, such as Figure 4 As shown, an engine shutdown control device is provided, including: a judgment module 402, a first control module 404, and a second control module 406, wherein:

[0082] The judgment module 402 is used to acquire the vehicle driving information during vehicle operation and determine whether the vehicle needs to perform an engine shutdown operation based on the vehicle driving information.

[0083] The first control module 404 is used to determine a power structure control strategy for the vehicle based on the vehicle driving information if an engine shutdown operation is required, and to control the power components of the vehicle according to the power structure control strategy.

[0084] The second control module 406 is used to cut off the fuel supply to the vehicle's engine if no engine start signal is received after controlling the vehicle's power components according to the power structure control strategy.

[0085] In one embodiment, the vehicle's driving information includes engine speed; the judgment module is further configured to determine that the vehicle needs to perform an engine shutdown operation if the engine speed of the vehicle meets the engine speed condition and the number of engine shutdown signals received within a preset time period reaches a preset shutdown number threshold.

[0086] In one embodiment, the vehicle driving information includes engine speed and accelerator pedal opening signal; the first control module is further configured to compare the engine speed with a preset idle speed to determine the speed difference between the idle speed and the engine speed; determine the demand torque change trend based on the accelerator pedal opening signal; determine a powertrain control strategy for the vehicle based on the speed difference and the demand torque change trend, and control the vehicle's power components according to the powertrain control strategy.

[0087] In one embodiment, the first control module is further configured to determine the rate of change of the accelerator pedal signal based on the accelerator pedal opening signal; if the rate of change of the accelerator pedal signal reaches a threshold, the demand torque change trend is determined to be an increase in demand torque; if the rate of change of the accelerator pedal signal does not reach the threshold, the demand torque change trend is determined to be a decrease in demand torque.

[0088] In one embodiment, the demand torque change trend includes either an increase in demand torque or a decrease in demand torque. The first control module is further configured to: when the speed difference is greater than a preset speed difference threshold and the demand torque change trend is an increase in demand torque, control the engine output torque to decrease, the drive motor output torque to increase, and the clutch to disengage; when the speed difference is greater than the preset speed difference threshold and the demand torque change trend is a decrease in demand torque, control the engine output torque to decrease, re-determine the speed difference, and return to the step of determining the powertrain control strategy for the vehicle based on the speed difference and the demand torque change trend; when the speed difference is less than or equal to the preset speed difference threshold and the demand torque change trend is an increase in demand torque, control the clutch to disengage and the drive motor output torque to increase; when the speed difference is less than or equal to the preset speed difference threshold and the demand torque change trend is a decrease in demand torque, control the clutch to disengage and the motor output torque to decrease. In one embodiment, the first control module is further configured to determine the clutch slip ratio of the clutch during the process of controlling the clutch disengagement.

[0089] If the clutch slip ratio reaches a preset slip ratio threshold, then control of the vehicle's power components is terminated.

[0090] The various modules in the aforementioned engine shutdown control device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in the processor of the electronic device in hardware form or independently of it, or stored in the memory of the electronic device in software form, so that the processor can call and execute the corresponding operations of each module.

[0091] In one embodiment, an electronic device is provided, which may be a terminal, and its internal structure diagram may be as follows: Figure 5 As shown, the electronic device includes a processor, memory, input / output interface, communication interface, display unit, and input device. The processor, memory, and input / output interface are connected via a system bus, and the communication interface, display unit, and input device are also connected to the system bus via the input / output interface. The processor provides computing and control capabilities. The memory includes a non-volatile storage medium and internal memory. The non-volatile storage medium stores the operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage medium. The input / output interface is used for exchanging information between the processor and external devices. The communication interface is used for wired or wireless communication with external terminals; wireless communication can be achieved through Wi-Fi, mobile cellular networks, NFC (Near Field Communication), or other technologies. When the computer program is executed by the processor, it implements a method for controlling the shutdown of an engine.

[0092] Those skilled in the art will understand that Figure 5 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the electronic device to which the present application is applied. The specific electronic device may include more or fewer components than shown in the figure, or combine certain components, or have different component arrangements.

[0093] In one embodiment, an electronic device is provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to perform the following steps:

[0094] During vehicle operation, the vehicle's driving information is acquired, and based on the driving information, it is determined whether the vehicle needs to perform an engine shutdown operation.

[0095] If an engine shutdown operation is required, a powertrain control strategy for the vehicle is determined based on the vehicle driving information, and the powertrain components of the vehicle are controlled according to the powertrain control strategy.

[0096] After controlling the vehicle's power components according to the power structure control strategy, if no engine start signal is received, the vehicle's engine will be cut off from fuel.

[0097] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon, the computer program performing the following steps when executed by a processor:

[0098] During vehicle operation, the vehicle's driving information is acquired, and based on the driving information, it is determined whether the vehicle needs to perform an engine shutdown operation.

[0099] If an engine shutdown operation is required, a powertrain control strategy for the vehicle is determined based on the vehicle driving information, and the powertrain components of the vehicle are controlled according to the powertrain control strategy.

[0100] After controlling the vehicle's power components according to the power structure control strategy, if no engine start signal is received, the vehicle's engine will be cut off from fuel.

[0101] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, performs the following steps:

[0102] During vehicle operation, the vehicle's driving information is acquired, and based on the driving information, it is determined whether the vehicle needs to perform an engine shutdown operation.

[0103] If an engine shutdown operation is required, a powertrain control strategy for the vehicle is determined based on the vehicle driving information, and the powertrain components of the vehicle are controlled according to the powertrain control strategy.

[0104] After controlling the vehicle's power components according to the power structure control strategy, if no engine start signal is received, the vehicle's engine will be cut off from fuel.

[0105] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of the relevant data shall comply with the relevant laws, regulations and standards of the relevant countries and regions.

[0106] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to these.

[0107] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0108] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. An engine stop control method characterized by comprising: The method comprises: During driving of the vehicle, vehicle driving information of the vehicle is acquired, and it is determined whether the vehicle needs to perform engine stop operation based on the vehicle driving information; If engine stop operation needs to be performed, a power structure control strategy for the vehicle is determined based on the vehicle driving information, and power components of the vehicle are controlled according to the power structure control strategy; wherein the vehicle driving information comprises engine speed and accelerator pedal opening degree signal; the determination of the power structure control strategy for the vehicle based on the vehicle driving information comprises: The engine speed is compared with a pre-set idle speed to determine a speed difference between the idle speed and the engine speed; The demand torque change trend is determined according to the accelerator pedal opening degree signal; The power structure control strategy for the vehicle is determined according to the speed difference and the demand torque change trend, wherein: When the speed difference is greater than a pre-set speed difference threshold and the demand torque change trend is demand torque increase, the output torque of the engine is controlled to decrease, the output torque of the drive motor is controlled to increase, and the clutch is controlled to separate; When the speed difference is greater than a pre-set speed difference threshold and the demand torque change trend is demand torque decrease, the output torque of the engine is controlled to decrease, the speed difference is re-determined, and the step of determining the power structure control strategy for the vehicle according to the speed difference and the demand torque change trend is returned to; After the power components of the vehicle are controlled according to the power structure control strategy, if an engine start signal is not received, fuel cut operation is performed on the engine of the vehicle.

2. The method of claim 1, wherein, The vehicle driving information of the vehicle comprises engine speed; the determination of whether the vehicle needs to perform engine stop operation based on the vehicle driving information comprises: If the engine speed of the vehicle meets an engine speed condition and the number of engine stop signals received in a pre-set time period reaches a pre-set number of stop signals threshold, it is determined that the vehicle needs to perform engine stop operation.

3. The method of claim 1, wherein, The determination of the demand torque change trend according to the accelerator pedal opening degree signal comprises: The accelerator pedal signal change rate is determined according to the accelerator pedal opening degree signal; If the accelerator pedal signal change rate reaches an accelerator pedal signal change rate threshold, it is determined that the demand torque change trend is demand torque increase; If the accelerator pedal signal change rate does not reach an accelerator pedal signal change rate threshold, it is determined that the demand torque change trend is demand torque decrease.

4. The method of claim 1, wherein, The demand torque change trend comprises any one of demand torque increase and demand torque decrease; The determination of the power structure control strategy for the vehicle according to the speed difference and the demand torque change trend, and the control of the power components of the vehicle according to the power structure control strategy further comprise: When the speed difference is less than or equal to a pre-set speed difference threshold and the demand torque change trend is demand torque increase, the clutch is controlled to separate and the output torque of the drive motor is controlled to increase; When the speed difference is less than or equal to a preset speed difference threshold, and the demand torque change trend is a demand torque decrease, the clutch is controlled to be separated, and the motor output torque is controlled to be decreased.

5. The method of claim 4, wherein, The method further comprises: In the process of controlling the clutch to be separated, a clutch slip rate of the clutch is determined; If the clutch slip rate reaches a preset slip rate threshold, the control on the power components of the vehicle is ended.

6. An engine stop control device characterized by comprising: The device comprises: The judging module is configured to acquire vehicle driving information of the vehicle during vehicle driving, and determine whether the vehicle needs to perform engine stop operation based on the vehicle driving information; The first control module is configured to, if the vehicle needs to perform engine stop operation, determine a power structure control strategy for the vehicle based on the vehicle driving information, and control the power components of the vehicle according to the power structure control strategy; The first control module is further configured to compare the engine speed with a preset idle speed, determine a speed difference between the idle speed and the engine speed, determine a demand torque change trend according to the accelerator pedal opening signal, and determine the power structure control strategy for the vehicle according to the speed difference and the demand torque change trend, wherein: when the speed difference is greater than a preset speed difference threshold, and the demand torque change trend is a demand torque increase, the output torque of the engine is controlled to be decreased, the output torque of the drive motor is controlled to be increased, and the clutch is controlled to be separated; when the speed difference is greater than the preset speed difference threshold, and the demand torque change trend is a demand torque decrease, the output torque of the engine is controlled to be decreased, the speed difference is re-determined, and the step of determining the power structure control strategy for the vehicle according to the speed difference and the demand torque change trend is returned to; The second control module is configured to, after the power components of the vehicle are controlled according to the power structure control strategy, if an engine start signal is not received, perform fuel cut operation on the engine of the vehicle.

7. The apparatus of claim 6, wherein, The vehicle driving information of the vehicle comprises an engine speed, and the judging module is further configured to, if the engine speed of the vehicle meets an engine speed condition, and the number of engine stop signals received in a preset time period reaches a preset number of stop signals threshold, determine that the vehicle needs to perform engine stop operation. 8.An electronic device comprising a memory and a processor, the memory storing a computer program, wherein, The processor executes the computer program to implement the steps of the method in any one of claims 1 to 5.

9. A computer-readable storage medium having stored thereon a computer program, characterized in that, The computer program is executed by the processor to implement the steps of the method in any one of claims 1 to 5.

10. A computer program product comprising a computer program, characterized in that, The computer program is executed by the processor to implement the steps of the method in any one of claims 1 to 5.

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