Engine shutdown control method and electronic equipment

Abstract

The invention discloses an engine shutdown control method and electronic equipment. The method comprises the steps that in response to detection that an engine on a vehicle enters a shutdown working condition, the running state of the engine and running parameters of power equipment on the vehicle are obtained; determining a control strategy of the power equipment based on the operation state; based on the operation state and the operation parameters, control parameters of the power equipment are determined; and based on the control parameters, the power equipment is controlled to operate according to a control strategy, so that noise generated by the engine under the shutdown working condition is reduced. The method and the device solve the technical problem that certain vibration and noise are generated when the engine is controlled to stop in the prior art, so that the vehicle using experience of a user is affected.

Description

Technical Field

[0001] This invention relates to the field of vehicle control, and more specifically, to an engine shutdown control method and electronic device. Background Technology

[0002] In hybrid and plug-in hybrid vehicles, the engine, as one of the primary power sources, significantly impacts overall vehicle performance and user experience during shutdown. Currently, when a user chooses to turn off the engine while the vehicle is in motion, a fuel cut-off is typically performed directly, causing the engine to shut down quickly. However, this simplistic shutdown strategy often overlooks power transmission and torque change management during engine shutdown. This results in a sudden torque surge at the moment the engine stops, causing vibration and noise, thus affecting the user's driving experience. Summary of the Invention

[0003] This invention provides an engine shutdown control method and electronic device to at least solve the technical problem in the related art that the engine shutdown control generates certain vibrations and noise, which affects the user's driving experience.

[0004] According to one aspect of the present invention, an engine shutdown control method is provided, comprising: in response to detecting that an engine on a vehicle has entered a shutdown condition, acquiring the operating state of the engine and operating parameters of a power device on the vehicle, wherein the power device includes an engine and is used to provide power to the vehicle; determining a control strategy for the power device based on the operating state; determining control parameters for the power device based on the operating state and the operating parameters, wherein the control parameters are used to characterize the parameters used by the power device when it is running in the operating state; and controlling the operation of the power device according to the control strategy based on the control parameters to reduce the noise generated by the engine in the shutdown condition.

[0005] Furthermore, the current operating status of the engine is obtained, including: obtaining the current engine speed and the engine torque change requirement, wherein the torque change requirement is used to reflect the change in the engine's required torque; and the operating status is determined based on the speed and torque change requirement.

[0006] Furthermore, based on the changes in engine speed and torque, the operating state is determined, including: in response to the engine speed being greater than a preset speed and the torque demand display showing an increase in required torque, the operating state is determined as the first operating state; in response to the engine speed being the preset speed and the torque demand display showing an increase in required torque, the operating state is determined as the second operating state; in response to the engine speed being greater than the preset speed and the torque demand display showing a decrease in required torque, the operating state is determined as the third operating state; in response to the engine speed being the preset speed and the torque demand display showing a decrease in required torque, the operating state is determined as the fourth operating state. The degree of noise generated by the engine varies under different operating states.

[0007] Furthermore, based on the operating status and operating parameters, the control parameters of the power equipment are determined, including: obtaining the parameter mapping relationship corresponding to the operating status, wherein the parameter mapping relationship is used to characterize the mapping relationship between the operating parameters and the control parameters; and constructing the control parameters based on the operating parameters and the parameter mapping relationship.

[0008] Furthermore, the power equipment also includes: a power battery, and control parameters including: the engine torque reduction rate, the drive motor torque adjustment amount, and the clutch disengagement time and disengagement speed; control parameters are constructed based on operating parameters and parameter mapping relationships, including: determining the torque reduction rate according to a first mapping relationship based on the engine speed and torque change requirements, and the engine load state, wherein the load state is used to characterize the ratio of the engine's output power to its maximum output power, and the maximum output power is used to characterize the maximum power that the engine can output under operating conditions; determining the torque adjustment amount according to a second mapping relationship based on the torque change requirements, the drive motor's maximum output torque, and the power battery's state of charge, wherein the maximum output torque is used to characterize the maximum torque that the drive motor can output under operating conditions; determining the disengagement time and disengagement speed according to a third mapping relationship based on the engine speed, the clutch slip ratio, and the torque distribution ratio, wherein the torque distribution ratio is used to characterize the ratio between the engine's output torque and the drive motor's output torque under operating conditions; wherein the operating parameters include: engine speed, torque change requirements, maximum output torque, state of charge, slip ratio, and torque distribution ratio; the parameter mapping relationships include the first mapping relationship, the second mapping relationship, and the third mapping relationship.

[0009] Furthermore, based on control parameters, the operation of the power equipment is controlled according to the control strategy, including: in response to the first operating state, controlling the engine to reduce the output torque based on the torque reduction rate, controlling the drive motor to adjust the output torque based on the torque adjustment amount, and controlling the clutch to disengage based on the disengagement time and disengagement speed; obtaining the clutch slip ratio; and in response to the slip ratio reaching a preset value and the engine not receiving a start signal, controlling the engine to cut off fuel.

[0010] Furthermore, based on control parameters, the operation of the power equipment is controlled according to the control strategy, including: in response to the second operating state, controlling the drive motor to adjust the output torque based on the torque adjustment amount, and controlling the clutch to disengage based on the disengagement time and disengagement speed; obtaining the clutch slip ratio; and in response to the slip ratio reaching a preset value and the engine not receiving a start signal, controlling the engine to cut off fuel.

[0011] Furthermore, based on control parameters, the operation of the power equipment is controlled according to the control strategy, including: in response to the third operating state, controlling the engine to reduce the output torque based on the torque reduction rate and monitoring the engine speed; in response to the speed reducing to a preset speed, controlling the clutch to disengage based on the disengagement time and disengagement speed, and controlling the drive motor to adjust the output torque based on the torque adjustment amount; obtaining the clutch slip ratio; in response to the slip ratio reaching a preset value and the engine not receiving a start signal, controlling the engine to cut off fuel.

[0012] Furthermore, based on control parameters, the operation of the power equipment is controlled according to the control strategy, including: in response to the fourth operating state, controlling the clutch to disengage based on the disengagement time and disengagement speed, and controlling the drive motor to adjust the output torque based on the torque adjustment amount; obtaining the slip ratio of the clutch; and in response to the slip ratio reaching a preset value and the engine not receiving a start signal, controlling the engine to cut off fuel.

[0013] According to another aspect of the present invention, an engine shutdown control device is also provided, comprising: a parameter acquisition module, configured to acquire the engine's operating state and operating parameters of a power unit on the vehicle in response to detecting that the engine on the vehicle has entered a shutdown condition, wherein the power unit includes an engine and is used to provide power to the vehicle; a strategy determination module, configured to determine a control strategy for the power unit based on the operating state; a parameter determination module, configured to determine control parameters for the power unit based on the operating state and the operating parameters, wherein the control parameters characterize the parameters used by the power unit when it is running in the operating state; and an equipment control module, configured to control the operation of the power unit according to the control strategy based on the control parameters, so as to reduce the noise generated by the engine in the shutdown condition.

[0014] Furthermore, the parameter acquisition module is also used to: acquire the current engine speed and the engine torque change requirement, wherein the torque change requirement is used to reflect the change in the engine's required torque; and determine the operating status based on the speed and torque change requirement.

[0015] Furthermore, the parameter acquisition module is also used to: determine the operating state as a first operating state in response to the engine speed being greater than a preset speed and the torque change demand display showing an increase in the required torque; determine the operating state as a second operating state in response to the engine speed being the preset speed and the torque change demand display showing an increase in the required torque; determine the operating state as a third operating state in response to the engine speed being greater than a preset speed and the torque change demand display showing a decrease in the required torque; and determine the operating state as a fourth operating state in response to the engine speed being the preset speed and the torque change demand display showing a decrease in the required torque. The degree of noise generated by the engine varies under different operating states.

[0016] Furthermore, the parameter determination module is also used to: obtain the parameter mapping relationship corresponding to the running state, wherein the parameter mapping relationship is used to characterize the mapping relationship between the running parameters and the control parameters; and construct control parameters based on the running parameters and the parameter mapping relationship.

[0017] Furthermore, the power equipment also includes: a power battery, and control parameters including: the engine torque reduction rate, the drive motor torque adjustment amount, and the clutch disengagement time and disengagement speed; the parameter determination module is also used to: determine the torque reduction rate according to a first mapping relationship based on the engine speed and torque change requirements, and the engine load state, wherein the load state is used to characterize the ratio of the engine's output power to its maximum output power, and the maximum output power is used to characterize the maximum power that the engine can output under operating conditions; determine the torque adjustment amount according to a second mapping relationship based on the torque change requirements, the maximum output torque of the drive motor, and the power battery state of charge, wherein the maximum output torque is used to characterize the maximum torque that the drive motor can output under operating conditions; determine the disengagement time and disengagement speed according to a third mapping relationship based on the speed, the clutch slip ratio, and the torque distribution ratio, wherein the torque distribution ratio is used to characterize the ratio between the engine's output torque and the drive motor's output torque under operating conditions; wherein the operating parameters include: speed, torque change requirements, maximum output torque, state of charge, slip ratio, and torque distribution ratio; the parameter mapping relationships include the first mapping relationship, the second mapping relationship, and the third mapping relationship.

[0018] Furthermore, the equipment control module is also used to: in response to the first operating state, control the engine to reduce the output torque based on the torque reduction rate, control the drive motor to adjust the output torque based on the torque adjustment amount, and control the clutch to disengage based on the disengagement time and disengagement speed; obtain the clutch slip ratio; and in response to the slip ratio reaching a preset value and the engine not receiving a start signal, control the engine to cut off fuel.

[0019] Furthermore, the equipment control module is also used to: in response to the second operating state, control the drive motor to adjust the output torque based on the torque adjustment amount, and control the clutch to disengage based on the disengagement time and disengagement speed; obtain the clutch slip ratio; and in response to the slip ratio reaching a preset value and the engine not receiving a start signal, control the engine to cut off fuel.

[0020] Furthermore, the equipment control module is also used to: in response to the third operating state, control the engine to reduce the output torque based on the torque reduction rate and monitor the engine speed; in response to the speed reduction to a preset speed, control the clutch to disengage based on the disengagement time and disengagement speed, and control the drive motor to adjust the output torque based on the torque adjustment amount; obtain the clutch slip ratio; and in response to the slip ratio reaching a preset value and the engine not receiving a start signal, control the engine to cut off fuel.

[0021] Furthermore, the equipment control module is also used to: in response to the fourth operating state, control the clutch to disengage based on the disengagement time and disengagement speed, and control the drive motor to adjust the output torque based on the torque adjustment amount; obtain the clutch slip ratio; and in response to the slip ratio reaching a preset value and the engine not receiving a start signal, control the engine to cut off fuel.

[0022] According to another aspect of the present invention, an electronic device is also provided, comprising: a memory storing an executable program; and a processor for running the program, wherein the program executes the methods of various embodiments of the present invention during runtime.

[0023] According to another aspect of the present invention, a computer-readable storage medium is also provided, the computer-readable storage medium including a stored executable program, wherein, when the executable program is executed, it controls the device where the computer-readable storage medium is located to perform the methods of various embodiments of the present invention.

[0024] According to another aspect of the present invention, a computer program product is also provided, including a computer program that, when executed by a processor, implements the methods of various embodiments of the present invention.

[0025] According to another aspect of the present invention, a computer program product is also provided, including a non-volatile computer-readable storage medium storing a computer program that, when executed by a processor, implements the methods of various embodiments of the present invention.

[0026] According to another aspect of the present invention, a computer program is also provided, which, when executed by a processor, implements the methods of the various embodiments of the present invention.

[0027] In this embodiment of the invention, the method involves acquiring the engine's operating status and the operating parameters of the vehicle's power equipment; determining the control strategy for the power equipment based on the operating status; determining the control parameters for the power equipment based on the operating status and operating parameters; and controlling the operation of the power equipment according to the control strategy based on the control parameters. By selecting an appropriate control strategy based on the engine's operating status during engine shutdown, the power equipment on the vehicle can be controlled to work collaboratively according to the control strategy, thereby reducing the vibration generated when the engine is shut down and thus reducing the noise generated by the engine. This solves the technical problem in related technologies where engine shutdown generates certain vibrations and noise, affecting the user's driving experience. Attached Figure Description

[0028] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0029] Figure 1 This is a flowchart illustrating an engine shutdown control method according to an embodiment of the present invention;

[0030] Figure 2 This is a structural block diagram of an engine shutdown control device according to an embodiment of this application. Detailed Implementation

[0031] 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 of the present invention. 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.

[0032] 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.

[0033] According to an embodiment of the present invention, an embodiment of a method for controlling engine shutdown is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0034] Figure 1 This is a flowchart illustrating an engine shutdown control method according to an embodiment of the present invention, such as... Figure 1 As shown, the method includes the following steps:

[0035] Step S102: In response to detecting that the engine on the vehicle has entered a shutdown state, the operating status of the engine and the operating parameters of the power equipment on the vehicle are obtained.

[0036] The power equipment includes an engine, which is used to provide power to the vehicle.

[0037] In one optional embodiment, considering that during engine shutdown, sudden changes in torque and interruption of power transmission may cause engine vibration and noise, thus affecting the user experience, the control system can specifically adjust the engine shutdown process to address the vibration and noise generated during shutdown, thereby improving the user experience.

[0038] Considering that the degree and cause of engine noise may differ under different operating conditions—for example, under high speed or high load conditions, the changes in mechanical stress and combustion pressure inside the engine may be more drastic, thus increasing vibration and noise—the control system can acquire the engine's operating status when it detects that the engine has entered a shutdown state. This allows the system to understand the engine's operating condition.

[0039] Furthermore, considering that engine vibration and noise are typically related to engine speed, torque variations, clutch slip ratio, and battery state of charge, coordinated control of the vehicle's power equipment can reduce engine vibration and consequently lower engine noise. For example, at higher engine speeds, the engine torque can be gradually reduced while the drive motor torque is increased to smooth power transmission and reduce the impact of sudden torque changes on the vehicle. Therefore, in addition to acquiring the engine's operating status, the control system can also acquire the operating parameters of the power equipment. Based on the operating status and parameters, reasonable control parameters can be determined, allowing the control system to control the operation of the power equipment according to these parameters, thereby minimizing engine noise during operation.

[0040] Step S104: Determine the control strategy for the power equipment based on the operating status.

[0041] In one optional embodiment, considering that due to the engine's working principle and physical characteristics, the power equipment used to reduce engine noise, and the operating modes of these power equipment, may differ under different operating conditions. For example, at high speeds, a smoother torque reduction strategy may be needed to avoid sudden mechanical shocks; while at low speeds, it is more crucial to quickly and smoothly switch to the drive motor to avoid idling vibration. Therefore, to avoid blindly controlling the power equipment according to predetermined control parameters, which could lead to poor control effects or even exacerbate vibration and noise, the control system can pre-determine different control strategies for different operating conditions to improve control accuracy and efficiency, ensuring effective reduction of noise and vibration under each condition.

[0042] Correspondingly, in the process of reducing engine noise, the control system can determine an appropriate control strategy based on the obtained engine operating status. This allows the control system to accurately and efficiently control the operation of the power equipment, avoiding increased noise and vibration due to improper control, ensuring that the entire shutdown process is both smooth and quiet, and improving the user's driving experience and the overall performance of the vehicle.

[0043] Step S106: Determine the control parameters of the power equipment based on the operating status and operating parameters.

[0044] Among them, control parameters are used to characterize the parameters used by the power equipment during operation.

[0045] In one optional embodiment, in order to accurately control the operation of the power equipment and avoid situations where the control strategy is not executed ideally, resulting in power interruption or increased vibration and noise, the control system can determine the control parameters of the power equipment that match the current operating state based on the acquired operating state and operating parameters, thereby realizing the control of the engine and drive motor, ensuring smooth power transition, and reducing vibration and noise.

[0046] For example, the control system can acquire the engine's speed and torque change requirements. Based on this information and the engine's load status, it can determine the rate of torque reduction to ensure smooth torque changes and reduce vibration. Alternatively, it can combine the maximum output torque of the drive motor and the state of charge of the power battery to determine the adjustment amount of the drive motor torque to balance power output and ensure smooth switching.

[0047] Step S108: Based on the control parameters, control the operation of the power equipment according to the control strategy to reduce the noise generated by the engine when it is stopped.

[0048] In one alternative embodiment, after determining a suitable control strategy and precise control parameters, the control system can control the operation of the power equipment according to the control strategy based on the control parameters, so as to reduce the noise generated by the engine during shutdown.

[0049] In this embodiment of the invention, the method involves acquiring the engine's operating status and the operating parameters of the vehicle's power equipment; determining the control strategy for the power equipment based on the operating status; determining the control parameters for the power equipment based on the operating status and operating parameters; and controlling the operation of the power equipment according to the control strategy based on the control parameters. By selecting an appropriate control strategy based on the engine's operating status during engine shutdown, the power equipment on the vehicle can be controlled to work collaboratively according to the control strategy, thereby reducing the vibration generated when the engine is shut down and thus reducing the noise generated by the engine. This solves the technical problem in related technologies where engine shutdown generates certain vibrations and noise, affecting the user's driving experience.

[0050] Furthermore, the current operating status of the engine is obtained, including: obtaining the current engine speed and the engine torque change requirement, wherein the torque change requirement is used to reflect the change in the engine's required torque; and the operating status is determined based on the speed and torque change requirement.

[0051] In one optional embodiment, to accurately determine the current operating state of the engine, the control system can first acquire the current engine speed and the engine's torque change requirement, and then determine the engine's operating state based on the speed and torque change requirement. The torque change requirement reflects whether the engine's required torque is increasing or decreasing.

[0052] Furthermore, based on the changes in engine speed and torque, the operating state is determined, including: in response to the engine speed being greater than a preset speed and the torque demand display showing an increase in required torque, the operating state is determined as the first operating state; in response to the engine speed being the preset speed and the torque demand display showing an increase in required torque, the operating state is determined as the second operating state; in response to the engine speed being greater than the preset speed and the torque demand display showing a decrease in required torque, the operating state is determined as the third operating state; in response to the engine speed being the preset speed and the torque demand display showing a decrease in required torque, the operating state is determined as the fourth operating state. The degree of noise generated by the engine varies under different operating states.

[0053] In one optional embodiment, when determining the engine's operating state based on the speed and torque change requirements, the control system can determine the operating state as the first operating state when the speed is greater than the preset speed and the torque change requirement shows an increase in the required torque.

[0054] When the rotation speed is at the preset speed and the torque change demand display shows an increase in the required torque, the operating state can be determined as the second operating state.

[0055] When the rotational speed is greater than the preset speed and the torque change demand display shows a decrease in the required torque, the operating state can be determined as the third operating state.

[0056] The engine can be set to a fourth operating state when the engine speed is at a preset speed and the torque demand display shows a decrease in torque demand. The level of noise generated by the engine varies in different operating states. For example, because internal mechanical vibrations and combustion noise are more pronounced under high speed and high torque demand, the noise level generated in the first operating state may be higher than that in the second operating state. Similarly, because combustion instability and minor vibrations of components can become the main noise sources when the engine is idling and torque demand is reduced, the noise level generated in the third operating state may differ from that in the fourth operating state.

[0057] Furthermore, based on the operating status and operating parameters, the control parameters of the power equipment are determined, including: obtaining the parameter mapping relationship corresponding to the operating status, wherein the parameter mapping relationship is used to characterize the mapping relationship between the operating parameters and the control parameters; and constructing the control parameters based on the operating parameters and the parameter mapping relationship.

[0058] In one optional embodiment, considering the complex interactions between the engine's physical characteristics and the power system, the mapping relationship between the operating parameters and control parameters of the power equipment may differ under different operating conditions. For example, under high-speed, high-torque demand operating conditions, the mapping relationship may emphasize the smooth transition between the rate of engine torque reduction and the amount of drive motor torque increase; while under low-speed, torque-demand-reduced operating conditions, the mapping relationship may focus more on controlling the clutch disengagement speed to avoid engine vibration. Therefore, in order to accurately determine the control parameters, the control system can first determine the mapping relationship between the corresponding operating parameters and control parameters based on the acquired operating conditions, i.e., determine the aforementioned parameter mapping relationship, and then use the operating parameters and the parameter mapping relationship to construct the corresponding control parameters.

[0059] Furthermore, the power equipment also includes: a power battery, and control parameters including: the engine torque reduction rate, the drive motor torque adjustment amount, and the clutch disengagement time and disengagement speed; control parameters are constructed based on operating parameters and parameter mapping relationships, including: determining the torque reduction rate according to a first mapping relationship based on the engine speed and torque change requirements, and the engine load state, wherein the load state is used to characterize the ratio of the engine's output power to its maximum output power, and the maximum output power is used to characterize the maximum power that the engine can output under operating conditions; determining the torque adjustment amount according to a second mapping relationship based on the torque change requirements, the drive motor's maximum output torque, and the power battery's state of charge, wherein the maximum output torque is used to characterize the maximum torque that the drive motor can output under operating conditions; determining the disengagement time and disengagement speed according to a third mapping relationship based on the engine speed, the clutch slip ratio, and the torque distribution ratio, wherein the torque distribution ratio is used to characterize the ratio between the engine's output torque and the drive motor's output torque under operating conditions; wherein the operating parameters include: engine speed, torque change requirements, maximum output torque, state of charge, slip ratio, and torque distribution ratio; the parameter mapping relationships include the first mapping relationship, the second mapping relationship, and the third mapping relationship.

[0060] In one optional embodiment, to minimize engine noise during shutdown, the power unit may further include a drive motor, a clutch, and a power battery. Corresponding control parameters may include: the engine torque reduction rate, the drive motor torque adjustment amount, and the clutch disengagement time and speed.

[0061] Based on this, when constructing control parameters, the control system can determine the torque reduction rate according to the engine's speed and torque variation requirements, as well as the engine's load status, based on the first mapping relationship. Here, load status can refer to the ratio of the engine's output power to its maximum output power, and maximum output power can refer to the maximum power the engine can output under operating conditions.

[0062] Simultaneously, the control system can determine the torque adjustment amount according to the torque change demand, the maximum output torque of the drive motor, and the state of charge of the power battery, based on a second mapping relationship. Here, the maximum output torque can refer to the maximum torque that the drive motor can output during operation.

[0063] Furthermore, the control system can determine the separation time and separation speed according to the third mapping relationship based on the engine speed, clutch slip ratio, and torque distribution ratio. Here, the torque distribution ratio refers to the ratio between the engine's output torque and the drive motor's output torque during operation.

[0064] Correspondingly, the operating parameters may include the aforementioned speed, torque variation requirements, maximum output torque, state of charge, slip ratio, and torque distribution ratio. The parameter mapping relationships may include the first, second, and third mapping relationships mentioned above.

[0065] Furthermore, based on control parameters, the operation of the power equipment is controlled according to the control strategy, including: in response to the first operating state, controlling the engine to reduce the output torque based on the torque reduction rate, controlling the drive motor to adjust the output torque based on the torque adjustment amount, and controlling the clutch to disengage based on the disengagement time and disengagement speed; obtaining the clutch slip ratio; and in response to the slip ratio reaching a preset value and the engine not receiving a start signal, controlling the engine to cut off fuel.

[0066] In one optional embodiment, considering the need for a smooth transition of power output from the engine to the drive motor during shutdown at high speeds and high torque demands to avoid vibration and noise caused by sudden torque changes, the control system, when controlling the power equipment in the first operating state, can first control the engine to reduce its output torque by adjusting the torque reduction rate, and then control the drive motor to adjust its output torque according to the torque adjustment amount. Simultaneously, it controls the clutch to disengage based on the disengagement time and speed. Then, the control system can obtain the clutch slip ratio and, if the slip ratio reaches a preset value and the engine does not receive a start signal, control the engine to cut off fuel.

[0067] Furthermore, based on control parameters, the operation of the power equipment is controlled according to the control strategy, including: in response to the second operating state, controlling the drive motor to adjust the output torque based on the torque adjustment amount, and controlling the clutch to disengage based on the disengagement time and disengagement speed; obtaining the clutch slip ratio; and in response to the slip ratio reaching a preset value and the engine not receiving a start signal, controlling the engine to cut off fuel.

[0068] In one optional embodiment, considering that when the engine is idling and torque demand increases, it is necessary to quickly and smoothly switch the power source from the engine to the drive motor to avoid idling vibration and power interruption, the control system can adjust the output torque of the drive motor according to the torque adjustment amount and control the clutch disengagement according to the disengagement time and disengagement speed when the power equipment is running in the second operating state. Then, the clutch slip ratio can be obtained, and when the slip ratio reaches a preset value and the engine does not receive a start signal, the engine fuel is cut off.

[0069] Furthermore, based on control parameters, the operation of the power equipment is controlled according to the control strategy, including: in response to the third operating state, controlling the engine to reduce the output torque based on the torque reduction rate and monitoring the engine speed; in response to the speed reducing to a preset speed, controlling the clutch to disengage based on the disengagement time and disengagement speed, and controlling the drive motor to adjust the output torque based on the torque adjustment amount; obtaining the clutch slip ratio; in response to the slip ratio reaching a preset value and the engine not receiving a start signal, controlling the engine to cut off fuel.

[0070] In one optional embodiment, considering the need for a smooth reduction in engine torque output when engine speed is high and torque demand is low, while avoiding power system instability caused by a sudden drop in engine speed, the control system, when controlling the power equipment in the third operating state, can first control the engine to reduce output torque according to the torque reduction rate and monitor the engine speed. Then, when the speed drops to a preset speed, the control system can control the clutch to disengage according to the disengagement time and disengagement speed, and control the drive motor to adjust the output torque according to the torque adjustment amount. Simultaneously, the control system can acquire the clutch slip ratio and, if the slip ratio reaches a preset value and the engine does not receive a start signal, control the engine to cut off fuel.

[0071] Furthermore, based on control parameters, the operation of the power equipment is controlled according to the control strategy, including: in response to the fourth operating state, controlling the clutch to disengage based on the disengagement time and disengagement speed, and controlling the drive motor to adjust the output torque based on the torque adjustment amount; obtaining the slip ratio of the clutch; and in response to the slip ratio reaching a preset value and the engine not receiving a start signal, controlling the engine to cut off fuel.

[0072] In one optional embodiment, considering that clutch disengagement and drive motor torque adjustment are critical operations when the engine is idling and torque demand is reduced, to avoid vibration in the power system due to changes in torque demand, the control system, when controlling the power equipment in the third operating state, can control clutch disengagement based on disengagement time and speed, and control the drive motor to adjust output torque based on torque adjustment amount. Simultaneously, the control system can acquire the clutch slip ratio and, if the slip ratio reaches a preset value and the engine does not receive a start signal, control the engine to cut off fuel.

[0073] According to an embodiment of the present invention, an apparatus embodiment corresponding to the engine shutdown control method is provided. It should be noted that the apparatus can be used to execute the above-described engine shutdown control method. Figure 2 This is a structural block diagram of an engine shutdown control device according to an embodiment of this application, such as... Figure 2 As shown, the device includes: a parameter acquisition module 202, a strategy determination module 204, a parameter determination module 206, and a device control module 208.

[0074] The parameter acquisition module 202 is used to acquire the engine's operating status and the operating parameters of the vehicle's power equipment in response to the detection that the engine has entered a shutdown state. The power equipment includes the engine and is used to provide power to the vehicle. The strategy determination module 204 is used to determine the control strategy of the power equipment based on the operating status. The parameter determination module 206 is used to determine the control parameters of the power equipment based on the operating status and operating parameters. The control parameters are used to characterize the parameters used by the power equipment when it is running. The equipment control module 208 is used to control the operation of the power equipment according to the control strategy based on the control parameters to reduce the noise generated by the engine when it is in a shutdown state.

[0075] Furthermore, the parameter acquisition module is also used to: acquire the current engine speed and the engine torque change requirement, wherein the torque change requirement is used to reflect the change in the engine's required torque; and determine the operating status based on the speed and torque change requirement.

[0076] Furthermore, the parameter acquisition module is also used to: determine the operating state as a first operating state in response to the engine speed being greater than a preset speed and the torque change demand display showing an increase in the required torque; determine the operating state as a second operating state in response to the engine speed being the preset speed and the torque change demand display showing an increase in the required torque; determine the operating state as a third operating state in response to the engine speed being greater than a preset speed and the torque change demand display showing a decrease in the required torque; and determine the operating state as a fourth operating state in response to the engine speed being the preset speed and the torque change demand display showing a decrease in the required torque. The degree of noise generated by the engine varies under different operating states.

[0077] Furthermore, the parameter determination module is also used to: obtain the parameter mapping relationship corresponding to the running state, wherein the parameter mapping relationship is used to characterize the mapping relationship between the running parameters and the control parameters; and construct control parameters based on the running parameters and the parameter mapping relationship.

[0078] Furthermore, the power equipment also includes: a power battery, and control parameters including: the engine torque reduction rate, the drive motor torque adjustment amount, and the clutch disengagement time and disengagement speed; the parameter determination module is also used to: determine the torque reduction rate according to a first mapping relationship based on the engine speed and torque change requirements, and the engine load state, wherein the load state is used to characterize the ratio of the engine's output power to its maximum output power, and the maximum output power is used to characterize the maximum power that the engine can output under operating conditions; determine the torque adjustment amount according to a second mapping relationship based on the torque change requirements, the maximum output torque of the drive motor, and the power battery state of charge, wherein the maximum output torque is used to characterize the maximum torque that the drive motor can output under operating conditions; determine the disengagement time and disengagement speed according to a third mapping relationship based on the speed, the clutch slip ratio, and the torque distribution ratio, wherein the torque distribution ratio is used to characterize the ratio between the engine's output torque and the drive motor's output torque under operating conditions; wherein the operating parameters include: speed, torque change requirements, maximum output torque, state of charge, slip ratio, and torque distribution ratio; the parameter mapping relationships include the first mapping relationship, the second mapping relationship, and the third mapping relationship.

[0079] Furthermore, the equipment control module is also used to: in response to the first operating state, control the engine to reduce the output torque based on the torque reduction rate, control the drive motor to adjust the output torque based on the torque adjustment amount, and control the clutch to disengage based on the disengagement time and disengagement speed; obtain the clutch slip ratio; and in response to the slip ratio reaching a preset value and the engine not receiving a start signal, control the engine to cut off fuel.

[0080] Furthermore, the equipment control module is also used to: in response to the second operating state, control the drive motor to adjust the output torque based on the torque adjustment amount, and control the clutch to disengage based on the disengagement time and disengagement speed; obtain the clutch slip ratio; and in response to the slip ratio reaching a preset value and the engine not receiving a start signal, control the engine to cut off fuel.

[0081] Furthermore, the equipment control module is also used to: in response to the third operating state, control the engine to reduce the output torque based on the torque reduction rate and monitor the engine speed; in response to the speed reduction to a preset speed, control the clutch to disengage based on the disengagement time and disengagement speed, and control the drive motor to adjust the output torque based on the torque adjustment amount; obtain the clutch slip ratio; and in response to the slip ratio reaching a preset value and the engine not receiving a start signal, control the engine to cut off fuel.

[0082] Furthermore, the equipment control module is also used to: in response to the fourth operating state, control the clutch to disengage based on the disengagement time and disengagement speed, and control the drive motor to adjust the output torque based on the torque adjustment amount; obtain the clutch slip ratio; and in response to the slip ratio reaching a preset value and the engine not receiving a start signal, control the engine to cut off fuel.

[0083] Embodiments of this application also provide an electronic device, including: a memory storing an executable program; and a processor for running the program, wherein the program executes the methods in various embodiments of the present invention during runtime.

[0084] Embodiments of this application also provide a computer-readable storage medium including a stored executable program, wherein, when the executable program is executed, it controls the device where the computer-readable storage medium is located to perform the methods of various embodiments of the present invention.

[0085] Embodiments of this application also provide a computer program product, including a computer program that, when executed by a processor, implements the methods of various embodiments of the present invention.

[0086] Embodiments of this application also provide a computer program product, including a non-volatile computer-readable storage medium for storing a computer program that, when executed by a processor, implements the methods in various embodiments of the present invention.

[0087] Embodiments of this application also provide a computer program that, when executed by a processor, implements the methods described in the various embodiments of the present invention.

[0088] In the above embodiments of the present invention, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0089] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual couplings, direct couplings, or communication connections may be through some interfaces; indirect couplings or communication connections between units or modules may be electrical or other forms.

[0090] The units described as separate components may or may not be physically separate. Similarly, the components shown as units may or may not be physical units; they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment, depending on actual needs.

[0091] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0092] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0093] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An engine shutdown control method, characterized in that, include: In response to detecting that the engine on the vehicle has entered a shutdown condition, the operating status of the engine and the operating parameters of the power equipment on the vehicle are obtained, wherein the power equipment includes the engine and the power equipment is used to provide power to the vehicle; Based on the operating status, determine the control strategy for the power equipment; Based on the operating state and the operating parameters, control parameters of the power equipment are determined, wherein the control parameters are used to characterize the parameters used by the power equipment when operating in the operating state; Based on the control parameters, the power equipment is controlled to operate according to the control strategy in order to reduce the noise generated by the engine under the shutdown condition.

2. The method according to claim 1, characterized in that, Obtaining the current operating status of the engine includes: The current engine speed and the engine torque change requirement are obtained, wherein the torque change requirement is used to reflect the change in the engine's required torque; The operating state is determined based on the required rotational speed and torque variation.

3. The method according to claim 2, characterized in that, Determining the operating state based on the aforementioned speed and torque variation requirements includes: In response to the rotational speed being greater than the preset rotational speed and the torque change demand display showing an increase in the required torque, the operating state is determined to be the first operating state; In response to the rotational speed being the preset rotational speed and the torque change demand display showing an increase in the required torque, the operating state is determined to be the second operating state; In response to the rotational speed being greater than the preset rotational speed and the torque change demand display showing a decrease in the required torque, the operating state is determined to be the third operating state; In response to the rotational speed being the preset rotational speed and the torque change demand indicating a decrease in the required torque, the operating state is determined to be the fourth operating state, wherein the degree of noise generated by the engine varies in different operating states.

4. The method according to claim 1, characterized in that, Based on the operating status and the operating parameters, the control parameters of the power equipment are determined, including: Obtain the parameter mapping relationship corresponding to the running state, wherein the parameter mapping relationship is used to characterize the mapping relationship between the running parameters and the control parameters; The control parameters are constructed based on the operating parameters and the parameter mapping relationship.

5. The method according to claim 4, characterized in that, The power equipment further includes: a drive motor, a clutch, and a power battery. The control parameters include: the torque reduction rate of the engine, the torque adjustment amount of the drive motor, and the disengagement time and speed of the clutch. The control parameters are constructed based on the operating parameters and the parameter mapping relationship, including: Based on the engine's speed and torque variation requirements, and the engine's load status, the torque reduction rate is determined according to a first mapping relationship, wherein the load status is used to characterize the ratio of the engine's output power to its maximum output power, and the maximum output power is used to characterize the maximum power that the engine can output under the operating state; Based on the torque change requirement, the maximum output torque of the drive motor, and the state of charge of the power battery, the torque adjustment amount is determined according to the second mapping relationship, wherein the maximum output torque is used to characterize the maximum torque that the drive motor can output under the operating state; Based on the rotational speed, the slip ratio of the clutch, and the torque distribution ratio, the separation time and the separation speed are determined according to a third mapping relationship, wherein the torque distribution ratio is used to characterize the ratio between the output torque of the engine and the output torque of the drive motor in the operating state; The operating parameters include: the rotational speed, the torque variation requirement, the maximum output torque, the state of charge, the slip ratio, and the torque distribution ratio; The parameter mapping relationship includes the first mapping relationship, the second mapping relationship, and the third mapping relationship.

6. The method according to claim 1, characterized in that, Based on the control parameters, the operation of the power equipment is controlled according to the control strategy, including: In response to the operating state being the first operating state, the engine is controlled to reduce its output torque based on the torque reduction rate, the drive motor is controlled to adjust its output torque based on the torque adjustment amount, and the clutch is controlled to disengage based on the disengagement time and disengagement speed. Obtain the slip ratio of the clutch; In response to the slip ratio reaching a preset value and the engine not receiving a start signal, the engine fuel is cut off.

7. The method according to claim 1, characterized in that, Based on the control parameters, the operation of the power equipment is controlled according to the control strategy, including: In response to the second operating state, the drive motor is controlled to adjust the output torque based on the torque adjustment amount, and the clutch is controlled to disengage based on the disengagement time and disengagement speed. Obtain the slip ratio of the clutch; In response to the slip ratio reaching a preset value and the engine not receiving a start signal, the engine fuel is cut off.

8. The method according to claim 1, characterized in that, Based on the control parameters, the operation of the power equipment is controlled according to the control strategy, including: In response to the operating state being the third operating state, the engine output torque is reduced based on the torque reduction rate, and the engine speed is monitored; In response to the speed decreasing to a preset speed, the clutch is controlled to disengage based on the separation time and separation speed, and the drive motor is controlled to adjust the output torque based on the torque adjustment amount; Obtain the slip ratio of the clutch; In response to the slip ratio reaching a preset value and the engine not receiving a start signal, the engine fuel is cut off.

9. The method according to claim 1, characterized in that, Based on the control parameters, the operation of the power equipment is controlled according to the control strategy, including: In response to the fourth operating state, the clutch is controlled to disengage based on the separation time and separation speed, and the drive motor is controlled to adjust the output torque based on the torque adjustment amount. Obtain the slip ratio of the clutch; In response to the slip ratio reaching a preset value and the engine not receiving a start signal, the engine fuel is cut off.

10. An electronic device, characterized in that, include: Memory, which stores executable programs; A processor for running the program, wherein the program, when running, performs the method according to any one of claims 1 to 9.

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