Fuel cut control method and device, vehicle and storage medium

Abstract

This invention discloses a fuel cut-off control method, device, vehicle, and storage medium. It can respond to a fuel cut-off request signal, acquire vehicle status data, determine the expected throttle release duration based on the vehicle status data, identify the vehicle's power supply mode when the expected throttle release duration exceeds the fuel cut-off demand duration, determine the fuel cut-off control method based on the vehicle's power supply mode, and control the vehicle to cut off fuel according to the fuel cut-off control method; after the fuel cut-off is completed, the power supply mode is switched to electric motor power supply. In other words, this invention can determine different fuel cut-off control methods for the vehicle based on different power supply modes, thereby achieving fuel cut-off of the engine. This allows for post-fuel cut-off oxygen diagnostics, avoiding the energy waste and unsmooth driving experience caused by the frequent switching of power sources between the engine and drive motor in traditional hybrid vehicles, and achieving the goal of optimizing vehicle drivability, economy, and environmental friendliness.

Description

Technical Field

[0001] This invention relates to the field of hybrid vehicle control, and more particularly to a fuel cut-off control method, device, vehicle, and storage medium. Background Technology

[0002] Currently, hybrid vehicles have become a hot topic in the global automotive industry. The core of hybrid vehicles lies in achieving a certain degree of energy recovery and reuse to improve drivability and fuel economy while reducing environmental impact. However, traditional hybrid vehicles, by frequently switching between the engine and the electric motor, result in a less smooth driving experience and energy waste. Summary of the Invention

[0003] This invention provides a fuel cut-off control method, device, vehicle, and storage medium, which can solve the problem of reduced driving smoothness and economy caused by frequent switching of power sources.

[0004] In a first aspect, the fuel cut-off control method provided in the embodiments of the present invention includes:

[0005] In response to a fuel cut-off request signal, acquire vehicle status data;

[0006] The expected duration of throttle release for the vehicle is determined based on the vehicle status data;

[0007] When the expected throttle release duration exceeds the fuel cut-off duration, the vehicle's power supply mode is identified;

[0008] The fuel cut-off control method of the vehicle is determined according to the power supply mode of the vehicle, and the fuel cut-off of the vehicle is controlled according to the fuel cut-off control method.

[0009] After the oil supply is cut off, the power supply mode is switched to the electric motor supplying power.

[0010] Secondly, the present invention provides a fuel cut-off control device, the device comprising:

[0011] The data acquisition module is used to acquire vehicle status data in response to the fuel cut-off request signal;

[0012] The expected duration determination module is used to determine the expected duration of releasing the accelerator pedal of the vehicle based on the vehicle status data.

[0013] A power mode recognition module is used to identify the power supply mode of the vehicle when the expected throttle release duration is greater than the fuel cut-off duration.

[0014] The control module is used to determine the fuel cut-off control method of the vehicle according to the power supply mode of the vehicle, and control the fuel cut-off of the vehicle according to the fuel cut-off control method.

[0015] The switching module is used to switch the power supply mode to the electric motor after the oil supply is cut off.

[0016] Thirdly, the vehicle provided by the present invention includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, it implements the fuel cut-off control method according to any embodiment of the present invention.

[0017] Fourthly, the present invention provides a computer-readable storage medium having a computer program stored thereon, characterized in that the program, when executed by a processor, implements the fuel cut-off control method described in any embodiment of the present invention.

[0018] The solution of this invention can acquire vehicle status data in response to a fuel cut-off request signal; determine the expected duration of throttle release based on the vehicle status data; identify the vehicle's power supply mode when the expected throttle release duration exceeds the fuel cut-off demand duration; determine the fuel cut-off control method based on the vehicle's power supply mode, and control the vehicle to cut off fuel according to the fuel cut-off control method; after the fuel cut-off is completed, switch the power supply mode to electric motor power supply. In other words, this invention can determine different fuel cut-off control methods for the vehicle based on different power supply modes, thereby achieving fuel cut-off for the engine. This allows for post-fuel cut-off oxygen diagnostics, avoiding the energy waste and unsmooth driving experience caused by the frequent switching of power sources between the engine and drive motor in traditional hybrid vehicles, and achieving the goal of optimizing vehicle drivability, economy, and environmental friendliness. Attached Figure Description

[0019] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic flowchart of the fuel cut-off control method provided by the present invention;

[0021] Figure 2 This is another schematic diagram of the fuel cut-off control method provided by the present invention;

[0022] Figure 3 This is a schematic diagram of the fuel cut-off control device provided by the present invention;

[0023] Figure 4 This is a structural schematic diagram of the vehicle provided by the present invention. Detailed Implementation

[0024] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0025] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0026] Figure 1 This is a flowchart illustrating a fuel cut-off control method provided by the present invention. This method can be executed by the fuel cut-off control device provided in this embodiment. The device can be implemented using software and / or hardware. In a specific embodiment, the device can be integrated into a vehicle. The vehicle may include: an Electronic Control Unit (ECU), a Hybrid Control Unit (HCU), an engine, an electric motor, a generator, and other components. The ECU can detect the operating status of components such as the engine and electric motor through sensors and control the operation of these components according to its internal algorithms. The HCU can formulate a strategy for controlling the future power supply mode of the hybrid system based on the feedback information output by the ECU. Specifically, it can control the cooperative relationship between various components in the vehicle (e.g., electric motor, generator, battery, etc.), for example, the power supply mode can be pure electric mode. (Reference) Figure 1 The method may specifically include the following steps:

[0027] Step 101: In response to the fuel cut-off request signal, obtain vehicle status data.

[0028] After the vehicle's engine starts, the vehicle's ECU detects the engine's operating status. When fuel cutoff is required, the electronic control unit sends a fuel cutoff request signal (i.e., fuel cutoff request signal). The vehicle's HCU receives this fuel cutoff request signal from the ECU. After receiving the fuel cutoff request signal, the HCU needs to acquire vehicle status data to determine whether the current fuel cutoff timing is appropriate. Acquiring vehicle status data typically occurs when the engine reaches a certain operating temperature and load conditions. Specifically, an appropriate fuel cutoff timing is after the engine has run for a period of time, reaching a certain operating temperature after multiple combustion cycles, ensuring effective after-oxygen diagnostics.

[0029] Specifically, after-oxygen diagnostics determines whether the engine and emission system are functioning properly by monitoring signals from various sensors, such as oxygen and NOx sensors. The aftertreatment system includes a three-way catalytic converter, which requires a sufficiently high temperature to function effectively and purify air pollutants. If unburned fuel remains in the catalytic converter, or if the catalytic converter's operating temperature is insufficient, effective pollutant degradation cannot be achieved. Therefore, during after-oxygen testing, the engine needs to continue running within a certain speed range to maintain the catalytic converter's normal operating temperature for the after-oxygen diagnostics to complete. Fuel cut-off is required for after-oxygen testing because the aftertreatment system of a fuel-ignition engine contains a three-way catalytic converter, which requires a sufficiently high temperature to operate. If the engine is shut off before the aftertreatment system reaches its normal operating temperature, residual unburned fuel will be introduced into the catalytic converter, and as the catalytic converter cools, toxic exhaust gases will be emitted from the exhaust system, polluting the environment and violating relevant national regulations.

[0030] Step 102: Determine the expected duration of releasing the accelerator based on the vehicle status data.

[0031] The expected throttle release time is predicted by analyzing vehicle status data such as vehicle speed, engine speed, and load. Fuel cut-off is only performed when the expected throttle release time exceeds the time allotted for post-oxygen diagnostics. Determining the expected throttle release time is primarily to allow sufficient time for post-oxygen diagnostics, preventing high power demands during fuel cut-off that could interrupt the process and reduce unnecessary drivability.

[0032] Specifically, the expected release time of the accelerator can be determined by combining vehicle big data analysis with the driver's driving habits to confirm the driver's release time of the accelerator under different road conditions such as urban areas, suburbs, and highways, and to predict and calibrate the operating conditions after fuel cut-off. During vehicle operation, the HCU, in conjunction with the vehicle positioning system, determines the current vehicle status data and predicts driving behavior within a short period of time.

[0033] Step 103: When the expected duration of throttle release exceeds the duration of fuel cut-off, identify the vehicle's power supply mode.

[0034] Specifically, the fuel cut-off time is the time required to complete a full fuel cut-off, usually a fixed value set in advance. The fuel cut-off time can be determined by calculating the fuel cut-off duration and the delayed shutdown duration. The fuel cut-off duration refers to the time required for the engine to switch from running to fuel cut-off mode, while the delayed shutdown duration is the time required for the engine to continue shutting down after confirmation of fuel cut-off. The specific fuel cut-off duration and delayed shutdown duration need to be set with reference to the specific model and technical requirements of the vehicle and engine. The fuel cut-off duration and delayed shutdown duration can be determined by two methods: (1) Empirical method: Based on past usage experience and relevant technical requirements, combined with the technical parameters of the vehicle and engine, the settings are made. This method is relatively simple, but there may be some errors. (2) Experimental method: The vehicle and engine are run under experimental conditions, and the fuel cut-off duration and delayed shutdown duration are determined through continuous adjustment and optimization. This method is more accurate, but it requires certain technical and human resources and is more costly.

[0035] By comparing the expected throttle release time with the required fuel cut-off time, if the expected throttle release time is shorter than the required fuel cut-off time, the timing of the fuel cut-off is inappropriate. If the expected throttle release time is longer than the required fuel cut-off time, the current vehicle condition meets the conditions for fuel cut-off. At this point, the vehicle's power supply mode is identified. Vehicle power supply modes include series and parallel modes. In series mode, the car is driven solely by the electric motor, with the engine providing power and charging the battery via a generator. In parallel mode, both the engine and electric motor can directly drive the vehicle. The vehicle's power supply mode can be identified based on the characteristics of series and parallel modes.

[0036] Step 104: Determine the fuel cut-off control method for the vehicle based on the vehicle's power supply mode, and control the vehicle's fuel cut-off according to the fuel cut-off control method.

[0037] When the vehicle's power supply mode is in series mode, a fuel cut-off operation is performed. The HCU needs to send a drive command to the electric motor to drag the engine to a specified speed. Fuel cut-off allows a large flow of air into the three-way catalytic converter for post-oxygen diagnostics. When the vehicle's power supply mode is in parallel mode, a fuel cut-off operation is performed, reducing the recovery torque of both the engine and the drive motor, allowing the engine to be dragged by the vehicle's inertia.

[0038] Step 105: After the oil supply is cut off, switch the power supply mode to electric motor power supply.

[0039] Specifically, after the fuel cut-off in series mode is completed, the series mode can be switched to a mode where the electric motor supplies power only. At this time, the engine is turned off, and the electric motor provides power to the vehicle.

[0040] Specifically, after the fuel cut-off in parallel mode, the clutch engages, and the engine and drive motor are coupled through a gear set to jointly drive the vehicle. At this point, the coupling between the engine and drive motor is disengaged. The parallel mode is then switched to series mode, achieving vehicle drive through the engine-generator-drive motor-transmission-wheel connection. Finally, the series mode is switched back to pure electric mode, at which point the engine shuts off, and the vehicle is driven by the electric motor.

[0041] The solution in this embodiment can acquire vehicle status data in response to a fuel cut-off request signal; determine the expected duration of throttle release based on the vehicle status data; when the expected throttle release duration exceeds the fuel cut-off requirement duration, identify the vehicle's power supply mode; determine the fuel cut-off control method based on the vehicle's power supply mode, and control the vehicle to cut off fuel according to the fuel cut-off control method; after the fuel cut-off is completed, switch the power supply mode to electric motor power supply. In other words, this invention can determine different fuel cut-off control methods for the vehicle based on different power supply modes, thereby achieving fuel cut-off for the engine. This allows for post-fuel cut-off oxygen diagnostics, avoiding the energy waste and unsmooth driving experience caused by the frequent switching of power sources between the engine and drive motor in traditional hybrid vehicles, and achieving the goal of optimizing vehicle drivability, economy, and environmental friendliness.

[0042] The fuel cut-off control method provided in this embodiment is further described below, such as... Figure 2 As shown, the fuel cut-off control method may specifically include the following steps:

[0043] Step 2010: In response to the fuel cut-off request signal, determine whether the accelerator pedal has been released.

[0044] After receiving the fuel cut-off request signal, the HCU first needs to determine whether the accelerator pedal is released. The ECU can detect the position of the accelerator pedal using a accelerator pedal sensor to determine whether the accelerator pedal is released. Only when the accelerator pedal is released can the next step of acquiring vehicle status data be performed. If the accelerator pedal is not released, it indicates that there is a fuel demand, and the preconditions for fuel cut-off are not met, so the current fuel cut-off cycle can be exited.

[0045] Step 2020: When the accelerator pedal is released, acquire vehicle status data.

[0046] When the accelerator pedal is detected to be released, vehicle status data is acquired. This data includes information such as the vehicle's location in different road modes, at different speeds, at different engine speeds, with different battery levels, and under different loads.

[0047] Step 2030: Determine the expected duration of throttle release based on vehicle status data.

[0048] The expected throttle release time can be analyzed using vehicle big data to understand driver habits and determine the throttle release time under different road conditions (urban, suburban, highway, etc.) and vehicle speeds. This allows for the prediction and calibration of the post-fuel cutoff operating conditions. During vehicle operation, the HCU, in conjunction with the vehicle positioning system, determines the current vehicle status data and predicts short-term driving behavior. Fuel cutoff is only performed if the expected time exceeds the post-oxygen diagnostic time. This is primarily to allow time for post-oxygen diagnostics and prevent high power demands during fuel cutoff from interrupting the process, thus minimizing unnecessary driving disruptions.

[0049] Step 2040: Determine whether the expected throttle release time is greater than the fuel cut-off time. If it is greater, proceed to step 2052; otherwise, proceed to step 2051.

[0050] The purpose of determining whether the expected throttle release time exceeds the required fuel cut-off time is to ensure that the engine does not unexpectedly stall or stop during post-oxygen diagnostics. Therefore, when performing post-oxygen diagnostics, it is necessary to determine whether the expected throttle release time exceeds the required fuel cut-off time based on the specific conditions of the engine and vehicle to ensure the safety and accuracy of the post-oxygen diagnostics.

[0051] For example, the time and power consumption after completing the oxygen diagnostic test at different speeds and SOCs can be used to determine the different fuel cut-off time requirements. The specific process is as follows: (1) Warm up the engine to meet the conditions for the oxygen diagnostic test; (2) Adjust the engine speed, taking 1500 as an example; (3) Control the engine fuel cut-off, driven by the GM motor, and record the time and power consumption after completing the oxygen diagnostic test at different SOCs (10%, 11%, 12%) and 2000 speeds; (4) Adjust the speed to 2000, 2500, 3000, 3500, 4000, with the speed increasing sequentially, and repeat the first two operations; (5) Confirm the maximum driving speed that NVH can accept and the time after completing the oxygen diagnostic test at this time. This is used to determine the maximum speed at which the battery can drive the engine at different SOCs and the time after completing the oxygen diagnostic test, which is also the fuel cut-off time requirement.

[0052] Step 2051: Exit this fuel cut-off.

[0053] If the expected throttle release time is no longer than the required fuel cut-off time, but the expected throttle release time is shorter than the required fuel cut-off time, then the expected throttle release time is insufficient to meet the requirements for post-oxygen diagnostics. If the magnet is used directly for post-oxygen diagnostics, the engine may suddenly stop or stall. This not only affects the accuracy of the diagnostics but may also lead to certain safety hazards. Therefore, it is necessary to stop this fuel cut-off operation.

[0054] Step 2052: Identify the vehicle's power supply mode. If the power supply mode is series mode, execute step 2061; if the power supply mode is parallel mode, execute step 2062. See step 103 for details.

[0055] Step 2061: Control the clutch to close.

[0056] When the power supply mode is series mode, the engine is decoupled from the vehicle, and the car is mainly driven by the electric motor and generator, with the engine serving as a power support device. To cut off the engine's fuel supply in series mode, first determine if the clutch is engaged. If the clutch is engaged, proceed directly to the next step of controlling the engine's fuel supply. If the clutch is disengaged, control the clutch to engage.

[0057] Step 2071: Open the engine throttle valve but do not supply fuel to the engine.

[0058] Specifically, after the clutch is engaged, the control ECU sends a command to the engine's fuel injection system to stop fuel injection, thus cutting off fuel supply. Simultaneously, a post-oxygen sensor diagnostic is performed on the vehicle's ECU to obtain accurate results. During this diagnostic, the engine throttle opening can be at or slightly above idle speed. When the engine speed is close to idle, the ECU can more accurately measure and calculate the output signal from the post-oxygen sensor.

[0059] Step 2081: Send a drive command containing a preset speed to the electric motor to control the electric motor to drive the vehicle and drive the engine to run at the preset speed.

[0060] The electric motor controller sends drive commands containing a preset speed to the electric motor. The electric motor controller is the control unit for the vehicle's electric motor. It monitors various factors such as battery charge and temperature, motor temperature, and torque based on the vehicle's required power, adjusting the motor control strategy to ensure stable and efficient vehicle operation. Upon receiving drive commands from the ECU, the electric motor controller parses the commands, converts them into motor torque and speed control commands, and sends them to the motor to drive the vehicle and operate the engine at the preset speed.

[0061] To ensure the electric motor's speed matches the engine's speed, a stable electric motor speed needs to be maintained within the engine's speed range during after-oxygen diagnostics. This allows for effective after-oxygen treatment without affecting the vehicle's normal operation. The preset speed is typically set at a higher level.

[0062] Step 2062: Control the clutch to close.

[0063] When the power supply mode is parallel, the clutch is engaged, and the engine and drive motor are coupled through a gear set to jointly drive the vehicle. To cut off engine fuel in parallel mode, first check if the clutch is engaged. If the clutch is engaged, proceed directly to the next step of controlling engine fuel cutoff. If the clutch is disengaged, control clutch engagement.

[0064] Step 2072: Open the engine throttle valve but do not supply fuel to the engine.

[0065] Specifically, after the clutch is engaged, the control ECU sends a command to the engine's fuel injection system to stop fuel injection, thus cutting off fuel supply. Simultaneously, a post-oxygen sensor diagnostic is performed on the vehicle's ECU to obtain accurate results. During this diagnostic, the engine throttle opening can be at or slightly above idle speed. When the engine speed is close to idle, the ECU can more accurately measure and calculate the output signal from the post-oxygen sensor.

[0066] Step 2082: Use the vehicle's inertia to drive the engine to run at a preset speed.

[0067] When the power supply mode is in parallel mode, the engine and electric motor stop running. The vehicle's inertia drives the engine to the preset speed required for post-oxygen diagnostics, completing the vehicle's post-oxygen diagnostics. After the post-oxygen diagnostics are completed, the fuel cut-off request signal is reset.

[0068] Step 2092: Disengage the clutch.

[0069] Specifically, after the post-oxygen diagnostics are completed, the vehicle needs to operate in pure electric mode to ensure economic efficiency. Currently, the vehicle is in parallel mode. To switch the vehicle from parallel mode to pure electric mode, it is necessary to first switch from parallel mode to series mode.

[0070] Specifically, during post-oxygen diagnostics in parallel mode, the engine's fuel line needs to be cut off. Therefore, the engine loses power and cannot supply power to the electric motor, leaving the vehicle powered solely by the battery. The battery may be depleted and unable to support operation in pure electric mode. When switching to pure electric mode, if the vehicle directly switches from parallel to pure electric mode, the electric motor will directly take over the vehicle's power output. However, because the engine is off during post-oxygen diagnostics, the vehicle may not be able to provide sufficient power, affecting normal driving. To avoid these problems, it is necessary to switch from parallel to series mode first. Switching from parallel to series mode requires disengaging the clutch.

[0071] Step 2102: Connect the engine to the generator.

[0072] Switching from parallel to series mode requires disengaging the clutch first, then connecting the engine and generator. This creates a system that drives the vehicle via the engine, generator, drive motor, transmission, and wheels. The series connection between the engine and electric motor allows the motor to receive additional power from the engine. This ensures sufficient power support for the vehicle after post-oxygen diagnostics.

[0073] Step 2110: Switch the power supply mode to electric motor power supply.

[0074] The parallel mode has been switched to series mode via steps 2092 and 2102. After ensuring that the electric motor receives additional power support from the engine in series mode, the series mode is switched to pure electric mode so that the vehicle can operate in pure electric mode. To switch from series mode to pure electric mode and allow the electric motor to supply power, simply stop the engine and disengage the clutch.

[0075] In this embodiment, different fuel cut-off control methods can be determined based on the vehicle's different power supply modes to achieve fuel cut-off of the engine. This allows for post-fuel oxygen diagnostics during fuel cut-off, avoiding the energy waste and unsmooth driving experience caused by the frequent switching of power sources between the engine and drive motor in traditional hybrid vehicles, and optimizing vehicle drivability, economy, and environmental friendliness. Simultaneously, this invention combines data such as the current vehicle driving status, the duration of throttle release, and the relationship between vehicle speed to determine the appropriate fuel cut-off timing, ensuring the overall stability of the vehicle's operation during fuel cut-off.

[0076] Figure 3 This is a schematic diagram of a fuel cut-off control device provided by the present invention, which may specifically include:

[0077] Data acquisition module 301 is used to acquire vehicle status data in response to fuel cut-off request signal;

[0078] The expected duration determination module 302 is used to determine the expected duration of releasing the accelerator pedal based on vehicle status data.

[0079] The power mode recognition module 303 is used to identify the vehicle's power supply mode when the expected throttle release time is longer than the fuel cut-off time.

[0080] The control module 304 is used to determine the fuel cut-off control method of the vehicle according to the vehicle's power supply mode, and control the vehicle to cut off fuel according to the fuel cut-off control method.

[0081] The switching module 305 is used to switch the power supply mode to electric motor power supply after the oil is cut off.

[0082] In one embodiment, the device further includes:

[0083] The judgment module is used to determine whether the accelerator pedal has been released;

[0084] When the accelerator pedal is released, the data acquisition module 301 is triggered to execute the step of acquiring vehicle status data.

[0085] In one embodiment, the control module 304 is specifically used for:

[0086] When the power supply mode is in series mode, the fuel supply is stopped while the engine is running, and the electric motor is controlled to drive the engine to run at a preset speed.

[0087] When the power supply mode is in parallel mode, the engine is kept running while the fuel supply is stopped, and the vehicle's inertia is used to drive the engine to run at a preset speed.

[0088] In one embodiment, the control module 304 stops fuel supply while keeping the engine running, specifically including:

[0089] Control the clutch engagement;

[0090] Opening the engine throttle does not supply fuel to the engine.

[0091] In one embodiment, the control module 304 controls the electric motor to drive the engine to operate at a preset speed, specifically including:

[0092] Send a drive command containing a preset speed to the electric motor to control the electric motor to drive the vehicle and drive the engine at the preset speed.

[0093] In one embodiment, the switching module 305 is specifically used for:

[0094] After the oil supply is cut off in series mode, the series mode is switched to electric motor power supply.

[0095] After the oil supply is cut off in parallel mode, the parallel mode is switched to series mode, and then the series mode is switched to the electric motor to supply power.

[0096] In one embodiment, the switching module 305 switches the parallel mode to the series mode, specifically including:

[0097] Disengage the clutch;

[0098] Connect the engine to the generator.

[0099] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional modules is merely an example. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. The specific working process of the functional modules described above can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0100] The solution in this embodiment can acquire vehicle status data in response to a fuel cut-off request signal; determine the expected duration of throttle release based on the vehicle status data; when the expected throttle release duration exceeds the fuel cut-off requirement duration, identify the vehicle's power supply mode; determine the fuel cut-off control method based on the vehicle's power supply mode, and control the vehicle to cut off fuel according to the fuel cut-off control method; after the fuel cut-off is completed, switch the power supply mode to electric motor power supply. In other words, this invention can determine different fuel cut-off control methods for the vehicle based on different power supply modes, thereby achieving fuel cut-off for the engine. This allows for post-fuel cut-off oxygen diagnostics, avoiding the energy waste and unsmooth driving experience caused by the frequent switching of power sources between the engine and drive motor in traditional hybrid vehicles, and achieving the goal of optimizing vehicle drivability, economy, and environmental friendliness.

[0101] This embodiment also provides a computer-readable medium having a computer program stored thereon, which, when executed by a processor, implements the fuel cut-off control method provided in any of the above embodiments.

[0102] The following is for reference. Figure 4 It shows a schematic diagram of the structure of a computer system 400 suitable for implementing this embodiment in a vehicle. Figure 4 The vehicle shown is merely an example and should not be construed as limiting the functionality and scope of the invention.

[0103] like Figure 4 As shown, the computer system 400 includes a central processing unit (CPU) 401, which can perform various appropriate actions and processes based on programs stored in read-only memory (ROM) 402 or programs loaded from storage section 408 into random access memory (RAM) 403. The RAM 403 also stores various programs and data required for the operation of the computer system 400. The CPU 401, ROM 402, and RAM 403 are interconnected via a bus 404. An input / output (I / O) interface 405 is also connected to the bus 404.

[0104] The following components are connected to I / O interface 405: an input section 406 including a keyboard, mouse, etc.; an output section 407 including a cathode ray tube (CRT), liquid crystal display (LCD), etc., and speakers, etc.; a storage section 408 including a hard disk, etc.; and a communication section 409 including a network interface card such as a LAN card, modem, etc. The communication section 409 performs communication processing via a network such as the Internet. A drive 410 is also connected to I / O interface 405 as needed. A removable medium 411, such as a disk, optical disk, magneto-optical disk, semiconductor memory, etc., is installed on drive 410 as needed so that computer programs read from it can be installed into storage section 408 as needed.

[0105] In particular, according to the embodiments disclosed in this invention, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments disclosed in this invention include a computer program product comprising a computer program carried on a computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via communication section 409, and / or installed from removable medium 411. When the computer program is executed by central processing unit (CPU) 401, it performs the functions defined in the system of this invention. It should be noted that the computer-readable medium shown in this invention can be a computer-readable signal medium or a computer-readable storage medium, or any combination of the two. The computer-readable storage medium can be, for example,—but not limited to—an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to: electrical connections having one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof. In this invention, a computer-readable storage medium can be any tangible medium containing or storing a program that can be used by or in connection with an instruction execution system, apparatus, or device. In this invention, a computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such propagated data signals can take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. A computer-readable signal medium can also be any computer-readable medium other than a computer-readable storage medium, which can transmit, propagate, or transfer a program for use by or in connection with an instruction execution system, apparatus, or device. The program code contained on the computer-readable medium can be transmitted using any suitable medium, including but not limited to: wireless, wire, optical fiber, RF, etc., or any suitable combination thereof.

[0106] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of the present invention. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram or flowchart, and combinations of blocks in a block diagram or flowchart, may be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0107] The modules and / or units described in this invention can be implemented in software or hardware. The described modules and / or units can also be housed in a processor; for example, a processor may be described as including a data acquisition module, an expected duration determination module, a power pattern recognition module, a control module, and a switching module. The names of these modules do not necessarily limit the module itself.

[0108] In another aspect, the present invention also provides a computer-readable medium, which may be included in the device described in the above embodiments; or it may exist independently and not assembled into the device. The computer-readable medium carries one or more programs that, when executed by the device, cause the device to include: acquiring vehicle status data in response to a fuel cut-off request signal; determining the expected duration of throttle release based on the vehicle status data; identifying the vehicle's power supply mode when the expected throttle release duration exceeds the fuel cut-off request duration; determining the vehicle's fuel cut-off control method based on the vehicle's power supply mode, and controlling the vehicle to cut off fuel according to the fuel cut-off control method; and switching the power supply mode to electric motor power supply after fuel cut-off is completed.

[0109] The solution in this embodiment can acquire vehicle status data in response to a fuel cut-off request signal; determine the expected duration of throttle release based on the vehicle status data; when the expected throttle release duration exceeds the fuel cut-off requirement duration, identify the vehicle's power supply mode; determine the fuel cut-off control method based on the vehicle's power supply mode, and control the vehicle to cut off fuel according to the fuel cut-off control method; after the fuel cut-off is completed, switch the power supply mode to electric motor power supply. In other words, this invention can determine different fuel cut-off control methods for the vehicle based on different power supply modes, thereby achieving fuel cut-off for the engine. This allows for post-fuel cut-off oxygen diagnostics, avoiding the energy waste and unsmooth driving experience caused by the frequent switching of power sources between the engine and drive motor in traditional hybrid vehicles, and achieving the goal of optimizing vehicle drivability, economy, and environmental friendliness.

[0110] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0111] It should be noted that the collection, gathering, updating, analysis, processing, use, transmission, and storage of user personal information involved in this disclosed technical solution all comply with relevant laws and regulations, are used for legitimate purposes, and do not violate public order and good morals. Necessary measures are taken to prevent unauthorized access to user personal information data and to safeguard user personal information security, network security, and national security.

[0112] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can occur depending on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A fuel cut control method applied to a vehicle including an electric motor, characterized by, The method comprises: obtaining vehicle state data in response to a fuel cut request signal; determining an expected idle time of the vehicle according to the vehicle state data; identifying a power supply mode of the vehicle when the expected idle time is greater than a fuel cut demand time; determining a fuel cut control mode of the vehicle according to the power supply mode of the vehicle, and controlling the vehicle to cut fuel according to the fuel cut control mode; switching the power supply mode to electric motor power supply after the fuel cut is completed; wherein the power supply mode comprises a series mode and a parallel mode, and the vehicle further comprises an engine, and the controlling the vehicle to cut fuel according to the fuel cut control mode comprises: when the power supply mode is the series mode, keeping the engine running while stopping fuel supply, and controlling the electric motor to drive the engine to run at a preset speed; when the power supply mode is the parallel mode, keeping the engine running while stopping fuel supply, and using vehicle inertia to drive the engine to run at the preset speed; wherein the switching the power supply mode to electric motor power supply after the fuel cut is completed comprises: after the series mode completes fuel cut, switching the series mode to electric motor power supply; after the parallel mode completes fuel cut, switching the parallel mode to the series mode, and then switching the series mode to electric motor power supply.

2. The fuel cut control method according to claim 1, characterized by, Before the obtaining vehicle state data, the method further comprises: determining whether the accelerator pedal is released; when the accelerator pedal is released, triggering the step of obtaining the vehicle state data.

3. The fuel cut control method according to claim 1, characterized by, The vehicle further comprises a clutch, and the keeping the engine running while stopping fuel supply comprises: controlling the clutch to close; opening the throttle of the engine and not supplying fuel to the engine.

4. The fuel cut control method according to claim 1, characterized by The controlling the electric motor to drive the engine to run at a preset speed comprises: sending a driving instruction containing the preset speed to the electric motor to control the electric motor to drive the vehicle to run and drive the engine to run at the preset speed.

5. The fuel cut control method according to claim 3, characterized by The vehicle further comprises a generator, and the switching the parallel mode to the series mode comprises: disconnecting the clutch; connecting the engine and the generator.

6. A fuel cut-off control device, applied to a vehicle, said vehicle including an electric motor, characterized in that, The device comprises: a data acquisition module configured to obtain vehicle state data in response to a fuel cut request signal; an expected time determination module configured to determine an expected idle time of the vehicle according to the vehicle state data; a power mode identification module configured to identify a power supply mode of the vehicle when the expected idle time is greater than a fuel cut demand time; a control module configured to determine a fuel cut control mode of the vehicle according to the power supply mode of the vehicle, and control the vehicle to cut fuel according to the fuel cut control mode; a switching module configured to switch the power supply mode to electric motor power supply after the fuel cut is completed. The power supply mode includes a series mode and a parallel mode, and the vehicle further comprises an engine; the control module is specifically configured to: when the power supply mode is the series mode, stop fuel supply while keeping the engine running, and control the electric motor to drive the engine to run at a preset rotating speed; when the power supply mode is the parallel mode, stop fuel supply while keeping the engine running, and use vehicle inertia to drive the engine to run at the preset rotating speed; The switching module is specifically configured to: after the series mode completes fuel cut, switch the series mode to the electric motor power supply mode; and after the parallel mode completes fuel cut, switch the parallel mode to the series mode, and then switch the series mode to the electric motor power supply mode.

7. A vehicle comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, The processor executes the program to implement the fuel cut control method in any one of claims 1 to 5.

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

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