Range extender shutdown control method, device, electronic device and storage medium

Abstract

The present application discloses a range extender shutdown control method, device, electronic device and storage medium. The range extender shutdown control method includes the following steps: obtaining the current state information of the vehicle; controlling the shutdown of the range extender according to the current state information, and when the engine runs out of fuel, controlling the throttle opening to maintain at a preset throttle opening. The present application solves the technical problem that the vehicle will be accompanied by vibration and noise during the shutdown process of the existing range extender.

Description

Technical Field

[0001] The present application relates to the field of vehicle braking technology, and in particular to a range extender shutdown control method, device, electronic device, and storage medium. Background Art

[0002] Pure electric vehicles offer advantages such as energy conservation and environmental protection, but their limited driving range, insufficient charging infrastructure, and slow charging speeds still hinder their acceptance by many consumers. To address this consumer anxiety and eliminate reliance on charging infrastructure, extended-range vehicles (ERVs) have experienced rapid development in recent years, gaining widespread acceptance from both a technical and market perspective. However, due to their low fuel consumption under medium- and high-load conditions, ERVs are currently operated at these levels in pursuit of fuel economy. This results in vehicle vibration and noise during downtime. Summary of the Invention

[0003] The main purpose of this application is to provide a range extender shutdown control method, device, electronic device and storage medium, aiming to solve the technical problem of the existing technology that the vehicle will vibrate and make noise during the shutdown process of the range extender.

[0004] To achieve the above objectives, the present application provides a range extender shutdown control method, comprising the following steps:

[0005] Get the current status information of the vehicle;

[0006] The range extender is controlled to shut down according to the current state information, and when the engine is fuel-cut off, the throttle opening is controlled to maintain a preset throttle opening.

[0007] Optionally, the step of controlling the range extender to shut down according to the current state information includes:

[0008] Determining a target shutdown mode according to the current state information, wherein the target shutdown mode includes a fast shutdown mode and a smooth shutdown mode;

[0009] Based on the target shutdown mode, the range extender is controlled to shut down.

[0010] Optionally, the current state information includes a current vehicle speed, and the step of determining a target parking mode according to the current state information includes:

[0011] When the current vehicle speed is less than a preset first vehicle speed threshold, determining the target shutdown mode to be a fast shutdown mode;

[0012] When the current vehicle speed is greater than a preset second vehicle speed threshold, the target shutdown mode is determined to be the gentle shutdown mode.

[0013] Optionally, the current state information includes the vehicle operation mode switching information, and the step of determining the target shutdown mode according to the current state information includes:

[0014] When the current vehicle speed is greater than or equal to a preset first vehicle speed threshold and less than a preset second vehicle speed threshold, based on the vehicle operation mode switching information, determine whether there is a driver switching operation of the vehicle operation mode;

[0015] If so, determine the target shutdown mode as the quick shutdown mode;

[0016] If not, determine the target shutdown mode as the gentle shutdown mode.

[0017] Optionally, the step of controlling the range extender to shut down based on the target shutdown mode includes:

[0018] In the gentle shutdown mode, control the generator speed to decrease to a preset generator shutdown speed at a constant rate of change, and control the engine output torque to decrease to a preset engine shutdown torque at a constant rate of change;

[0019] In the quick shutdown mode, control the engine to cut off fuel so that the generator speed decreases to a preset generator shutdown speed and the engine output torque decreases to a preset engine shutdown torque.

[0020] Optionally, the current state information includes the current power generation, the current generator speed, and the current engine output torque. The step of controlling the generator speed to decrease to a preset generator shutdown speed at a constant rate of change and the engine output torque to decrease to a preset engine shutdown torque at a constant rate of change includes:

[0021] Determine the target speed regulation time corresponding to the current power generation;

[0022] According to the current generator speed, the preset generator shutdown speed, and the target speed regulation time, determine the speed decrease slope, and according to the current engine output torque, the preset engine shutdown torque, and the target speed regulation time, determine the torque decrease slope;

[0023] Based on the speed decrease slope, control the generator speed to decrease to a preset generator shutdown speed at a constant rate of change, and based on the torque decrease slope, control the engine output torque to decrease to a preset engine shutdown torque at a constant rate of change.

[0024] Optionally, after the step of controlling the range extender to shut down according to the current state information and controlling the throttle opening to maintain at a preset throttle opening when the engine cuts off fuel, further includes:

[0025] When the time for the engine speed to remain within the preset idle speed range reaches the preset time threshold, the control of the throttle opening is released.

[0026] This application also provides an extender shutdown control device, which includes:

[0027] An acquisition module for acquiring the current state information of the vehicle;

[0028] A control module for controlling the shutdown of the extender according to the current state information, and when the engine runs out of fuel, controlling the throttle opening to maintain at a preset throttle opening.

[0029] This application also provides an electronic device, which is a physical device. The electronic device includes: a memory, a processor, and a program of the extender shutdown control method stored on the memory and executable on the processor. When the program of the extender shutdown control method is executed by the processor, the steps of the extender shutdown control method as described above can be implemented.

[0030] This application also provides a storage medium, which is a computer-readable storage medium. A program for implementing the extender shutdown control method is stored on the computer-readable storage medium. When the program of the extender shutdown control method is executed by the processor, the steps of the extender shutdown control method as described above are implemented.

[0031] This application provides an extender shutdown control method, device, electronic device and storage medium. By acquiring the current state information of the vehicle, the monitoring of the vehicle state before the extender shuts down is realized. Furthermore, by controlling the shutdown of the extender according to the current state information, and when the engine runs out of fuel, controlling the throttle opening to maintain at a preset throttle opening, the shutdown control of the extender adapted to the current state of the vehicle is realized. And when the engine runs out of fuel, by controlling the throttle opening, the vibration and noise of the engine are reduced. In this way, on the one hand, when the extender is in the on state, the engine will generate noise, and when the extender shuts down, the engine may oscillate and may also generate noise. There will also be wind noise and other noises during vehicle driving. In this application, since the extender shutdown control is adjusted based on the current state information of the vehicle, it can adapt to the overall noise and vibration conditions of the vehicle in different states, so that the overall noise perceived by the passengers in the vehicle can be reduced. On the other hand, through the control of the throttle opening, when the extender passes through the zero torque point, the throttle will not open and close freely, and the intake air volume of the engine will not change suddenly, thus effectively reducing the vibration and noise of the engine. Therefore, the technical defect that the vehicle will be accompanied by vibration and noise when the extender shuts down during medium and high load operation is overcome, and the noise and vibration during the extender shutdown process are reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings here are incorporated into the specification and form a part of this specification, showing embodiments consistent with this application, and are used together with the specification to explain the principles of this application.

[0033] To more clearly illustrate the technical solutions in the embodiments of this application or in the prior art, the following will briefly introduce the accompanying drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0034] Figure 1 It is a schematic flowchart of the first embodiment of the range extender shutdown control method in this application;

[0035] Figure 2 It is a schematic diagram of the hardware architecture involved in the range extender shutdown control method in this embodiment;

[0036] Figure 3 It is a schematic flowchart of an implementable manner of the range extender shutdown control method in this application;

[0037] Figure 4 It is a schematic flowchart of the second embodiment of the range extender shutdown control method in this application;

[0038] Figure 5 It is a schematic structural diagram of an embodiment of the range extender shutdown control device in this application;

[0039] Figure 6 It is a schematic diagram of the device structure of the hardware operating environment involved in the range extender shutdown control method in the embodiments of this application.

[0040] The achievement of the objectives, functional features, and advantages of this application will be further described in conjunction with the embodiments and with reference to the accompanying drawings. Specific Embodiments

[0041] To make the above objectives, features, and advantages of the present invention more clearly understandable, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0042] Embodiment 1

[0043] The embodiments of this application provide a range extender shutdown control method. In the first embodiment of the range extender shutdown control method of this application, refer to Figure 1 , and it includes the following steps:

[0044] Step S10, obtain the current state information of the vehicle;

[0045] The execution subject of the method in this embodiment can be a range extender shutdown control device, or a range extender shutdown control terminal device or server. In this embodiment, the range extender shutdown control device is taken as an example. This range extender shutdown control device can be integrated on terminal devices such as a vehicle with data processing function, a vehicle control unit, an on-vehicle terminal, a smart phone, a tablet computer, etc.

[0046] For the convenience of description, the vehicle control unit is taken as the execution subject for subsequent description in this embodiment. Refer to Figure 2 , Figure 2 is a schematic diagram of the hardware architecture involved in the range extender shutdown control method in this embodiment. The vehicle control unit (VCU, Vehicle control unit) can communicate with the battery management system (BMS, Battery Management System) etc. through an external public CAN (controller area network, control local area network), and can communicate with the engine management system (EMS, Engine-Management-System) and the generator controller (GCU, generator control unit) through an internal CAN. The vehicle control unit receives signals on the external public CAN and / or the internal CAN, and judges whether to control the range extender to shut down based on these signals. When it is judged that the range extender needs to be shut down, the VCU can send a range extender shutdown instruction to the GCU and / or the EMS according to the current state information of the vehicle, so that the GCU and / or the EMS perform range extender shutdown control based on the range extender shutdown instruction.

[0047] In this embodiment, during the process of the vehicle being powered on and running, signals on the external public CAN and / or the internal CAN can be received, and based on each of the signals, it is determined whether to control the range extender to shut down. When it is determined that the range extender needs to be shut down, the current state information of the vehicle is obtained. Among them, the current state information includes the current vehicle speed, the current overall vehicle operation mode, the range extender shutdown information, the current throttle opening, the current remaining battery power, etc. The current state information can be used to characterize the current driving state of the vehicle. The noise and vibration conditions of the vehicle in different driving states are different. For example, when the vehicle is driving at a high speed, the wind noise is relatively large, and the noise generated by the engine operation is easily masked by the wind noise. That is, at this time, the overall noise of the vehicle mainly comes from the wind noise, and the driver's attention is more concentrated on the road conditions and the safe driving of the vehicle, and the perception of the engine noise is relatively weak, and the driver is more sensitive to the vibration conditions of the vehicle. When the vehicle driving speed is relatively low, the wind noise is small, and the noise generated by the engine operation will stand out. That is, at this time, the overall noise of the vehicle mainly comes from the engine, and at this time the driver is relatively relaxed and more sensitive to the engine noise.

[0048] Step S20, control the range extender to shut down according to the current state information, and when the engine cuts off fuel, control the throttle opening to maintain at a preset throttle opening.

[0049] In this embodiment, a target range extender shutdown strategy is determined according to the current state information of the vehicle, and the range extender is controlled to shut down based on the target range extender shutdown strategy. At the same time when the engine cuts off fuel, the control right of the throttle opening is taken over, and the throttle opening is controlled at a preset throttle opening, so that the throttle will not open and close freely, and the intake air volume of the engine will not be too large or too small, thereby effectively reducing the jitter and noise of the engine. The smaller the preset throttle opening, the smaller the intake air volume of the engine, the smaller the air flow rate, and the smaller the resulting jitter and noise. Among them, the preset throttle opening can be set according to actual needs, and can be, for example, 0. The range extender shutdown strategy can be engine fuel cut-off. Engine fuel cut-off can quickly complete the shutdown process, and the engine stops working quickly, so as to quickly complete the range extender shutdown control; the range extender shutdown strategy can be to control the engine output torque and the generator speed to decrease based on a certain rule. Exemplarily, it decreases in a curve, decreases in a straight line at a constant change rate, decreases step by step in a stepped manner, etc.

[0050] Optionally, the step of controlling the range extender to shut down according to the current state information includes:

[0051] Step A10, determine a target shutdown mode according to the current state information, where the target shutdown mode includes a quick shutdown mode and a smooth shutdown mode;

[0052] In this embodiment, the current state information of the vehicle is compared with the selection conditions of each preset shutdown mode, and the target shutdown mode that the vehicle currently meets the selection conditions is selected from each shutdown mode. Among them, the target shutdown mode includes a rapid shutdown mode and a gentle shutdown mode. The rapid shutdown mode refers to a mode in which the torque of the engine and the rotational speed of the generator are controlled to be reduced to the shutdown state within the shortest possible shutdown time. The gentle shutdown mode refers to a mode in which the torque of the engine and the rotational speed of the generator are gradually and gently transitioned to the shutdown state.

[0053] Optionally, the current state information includes the current vehicle speed. The step of determining the target shutdown mode according to the current state information includes:

[0054] Step A10, when the current vehicle speed is less than a preset first vehicle speed threshold, determine that the target shutdown mode is the rapid shutdown mode;

[0055] Step A20, when the current vehicle speed is greater than a preset second vehicle speed threshold, determine that the target shutdown mode is the gentle shutdown mode.

[0056] In this embodiment, after obtaining the current vehicle speed of the vehicle, the current vehicle speed is compared with a preset first vehicle speed threshold and a preset second vehicle speed threshold. When the current vehicle speed is less than the preset first vehicle speed threshold, since the current vehicle speed is low and the wind noise is small, the noise generated by the engine operation will become prominent. At this time, the shorter the time consumed for the range extender to shut down, the shorter the duration of the noise generated by the engine. Therefore, rapid shutdown can reduce the impact of noise on the vehicle occupants as a whole. Therefore, it is determined that the target shutdown mode is the rapid shutdown mode. In this embodiment, while the engine cuts off fuel, the throttle opening is also controlled to maintain at a preset throttle opening, so that the throttle does not open and close freely, and the intake air volume of the engine does not fluctuate greatly, thereby effectively reducing the engine jitter and noise during the rapid shutdown process. In an implementable manner, the preset first vehicle speed threshold is calibrated to 25 km / h.

[0057] When the current vehicle speed is greater than the preset second vehicle speed threshold, due to the relatively high current vehicle speed, the wind noise is relatively high, and the noise generated by the engine operation is easily masked by the wind noise. Moreover, the driver's attention is more concentrated on the road conditions and the safe driving of the vehicle, resulting in a weaker perception of the engine noise and being more sensitive to the vibration condition of the vehicle. Therefore, gentle shutdown can reduce the vehicle vibration. At the same time, it can make good use of the inertial kinetic energy, convert the inertial kinetic energy into electrical energy for storage, and improve the power generation under the same resource consumption. Therefore, the target shutdown mode is determined to be the gentle shutdown mode. In this embodiment, when the engine cuts off fuel, the throttle opening is also controlled to maintain at the preset throttle opening, so that the throttle does not open and close freely, and the engine intake air volume does not vary greatly, thereby further reducing the engine jitter and noise during the gentle shutdown process. In an implementable manner, the preset second vehicle speed threshold is calibrated to 60 km / h.

[0058] When the current vehicle speed is greater than or equal to the preset first vehicle speed threshold and less than the preset second vehicle speed threshold, the target shutdown mode can be determined to be the quick shutdown mode or the gentle shutdown mode, or it can be further determined in combination with other current state information.

[0059] Optionally, the current state information includes the vehicle operation mode switching information. The step of determining the target shutdown mode according to the current state information includes:

[0060] Step A31, when the current vehicle speed is greater than or equal to the preset first vehicle speed threshold and less than the preset second vehicle speed threshold, based on the vehicle operation mode switching information, determine whether there is a driver switching operation of the vehicle operation mode;

[0061] Step A32, if so, determine the target shutdown mode to be the quick shutdown mode;

[0062] Step A33, if not, determine the target shutdown mode to be the gentle shutdown mode.

[0063] In this embodiment, after obtaining the current vehicle speed of the vehicle, the current vehicle speed is compared with a preset first vehicle speed threshold and a preset second vehicle speed threshold. When the current vehicle speed is greater than or equal to the preset first vehicle speed threshold and less than the preset second vehicle speed threshold, it is determined whether there is a driver switching operation for the vehicle operation mode according to the vehicle operation mode switching information, that is, it is determined whether the driver actively switches the vehicle operation mode resulting in the shutdown of the range extender. If it is determined that there is a driver switching operation for the vehicle operation mode, the driver usually diverts a certain amount of attention to whether the mode switching is successful after switching the mode. Therefore, the shorter the time consumed for the shutdown of the range extender, the shorter the time for the driver to divert attention, and the higher the driving safety. Therefore, the target shutdown mode is determined to be the fast shutdown mode. If it is determined that there is no driver switching operation for the vehicle operation mode, the gentle shutdown can effectively reduce the noise and vibration generated by the shutdown of the range extender. Therefore, the target shutdown mode is determined to be the gentle shutdown mode.

[0064] Step A20, based on the target shutdown mode, control the range extender to shut down.

[0065] In this embodiment, based on the target range extender shutdown strategy corresponding to the target shutdown mode, control the range extender to shut down.

[0066] Optionally, after the step of controlling the range extender to shut down according to the current state information and controlling the throttle opening to maintain at a preset throttle opening when the engine cuts off fuel, the following steps are further included:

[0067] Step S30, when the time for detecting that the engine speed remains within the preset idle speed range reaches a preset time threshold, release the control of the throttle opening.

[0068] In this embodiment, after taking over the control right of the throttle opening, the engine speed can be continuously detected. When it is detected that the engine speed decreases to the preset idle speed range, timing starts, and it is continuously detected whether the engine speed exceeds the preset idle speed range. If it is detected that the engine speed exceeds the preset idle speed range, the timing is initialized, that is, the timing is stopped and the timing duration is cleared. When the timing reaches the preset time threshold, the control of the throttle opening is released so that the throttle opening returns to the self-learning initial position. Wherein, the preset idle speed range can be determined according to the actual situation and vehicle tests, etc., and this embodiment does not limit this. The preset time threshold can be determined through vehicle calibration, and this embodiment does not limit this. Exemplarily, it can be 0.5 s.

[0069] In an implementable manner, referring to Figure 3, the range extender shutdown control method includes the following steps: The vehicle control unit (VCU) determines whether to control the range extender to shut down based on bus signals, hardwired signals, etc. If it is necessary to control the range extender to shut down, it further determines whether the vehicle speed is less than the first vehicle speed threshold.

[0070] If the vehicle speed is less than the first vehicle speed threshold, a rapid shutdown command for the range extender is sent. After receiving the rapid shutdown command, the engine management system (EMS) immediately controls the engine to cut off fuel supply in response to the rapid shutdown command, and at the same time controls the throttle opening to maintain at 0. The EMS continuously monitors whether the duration of the engine speed being 0 is greater than the time threshold t1. If the duration of the engine speed being 0 is less than or equal to t1, the throttle opening is continuously controlled to maintain at 0 until the duration of the engine speed being 0 is greater than t1. Then the EMS controls the throttle to return to the self-learning initial position, and the shutdown of the range extender is completed.

[0071] If the vehicle speed is greater than or equal to the first vehicle speed threshold, it continues to determine whether the vehicle speed is greater than or equal to the first vehicle speed threshold and less than the second vehicle speed threshold. If the vehicle speed is greater than or equal to the second vehicle speed threshold, a model look-up table is performed based on the current power generation of the range extender to determine the target speed regulation time, and a gentle shutdown command for the range extender is sent. After receiving the gentle shutdown command, the generator control unit (GCU) adjusts the generator speed to idle speed according to the slope = (current generator speed - preset generator shutdown speed) / target speed regulation time in response to the gentle shutdown command. After receiving the gentle shutdown command, the EMS adjusts the engine output torque to 0 according to the slope = ((current engine output torque - preset engine shutdown torque) / target speed regulation time). The EMS determines whether the engine reaches the idle state. If so, the EMS controls the engine to cut off fuel supply, and at the same time controls the throttle opening to maintain at 0. The EMS continuously monitors whether the duration of the engine speed being 0 is greater than the time threshold t1. If the duration of the engine speed being 0 is less than or equal to t1, the throttle opening is continuously controlled to maintain at 0 until the duration of the engine speed being 0 is greater than t1. Then the EMS controls the throttle to return to the self-learning initial position, and the shutdown of the range extender is completed.

[0072] If the vehicle speed is greater than or equal to the first vehicle speed threshold and less than the second vehicle speed threshold, it further determines whether the range extender needs to be shut down due to the driver actively switching the vehicle operation mode. If the range extender needs to be shut down due to the driver actively switching the vehicle operation mode, a rapid shutdown command for the range extender is sent. If it is not due to the driver actively switching the vehicle operation mode that the range extender needs to be shut down, a model look-up table is performed based on the current power generation of the range extender to determine the target speed regulation time, and a gentle shutdown command for the range extender is sent.

[0073] In this embodiment, by obtaining the current state information of the vehicle, the monitoring of the vehicle state before the range extender stops is achieved. Furthermore, by controlling the shutdown of the range extender according to the current state information, and when the engine cuts off fuel, controlling the throttle opening to maintain at a preset throttle opening, the shutdown control of the range extender adapted to the current state of the vehicle is achieved, and when the engine cuts off fuel, the engine jitter and noise are reduced by controlling the throttle opening. Thus, on the one hand, when the range extender is in the on state, the engine generates noise, and when the range extender stops, the engine may oscillate and may also generate noise, and there will also be wind noise and other noises during vehicle driving. In this application, since the shutdown control of the range extender is adjusted based on the current state information of the vehicle, it can adapt to the overall noise and vibration conditions of the vehicle in different states, thereby reducing the overall noise perceived by the passengers in the vehicle. On the other hand, through the control of the throttle opening, when the range extender passes through the zero torque point, the throttle does not open and close freely, and the intake air volume of the engine does not change suddenly, thus effectively reducing the engine jitter and noise. Therefore, the technical defect that the vehicle will be accompanied by vibration and noise when the range extender stops during medium and high load operation is overcome, and the noise and vibration during the shutdown process of the range extender are reduced.

[0074] Embodiment Two

[0075] Further, referring to Figure 4 , based on the above embodiments of the present application, in the second embodiment of the present application, the content that is the same or similar to the above embodiments can be referred to the above introduction and will not be elaborated hereinafter. On this basis, the target shutdown mode includes a fast shutdown mode and a smooth shutdown mode, and the steps of controlling the shutdown of the range extender based on the target shutdown mode include:

[0076] Step A21, in the smooth shutdown mode, controlling the generator speed to decrease to a preset generator shutdown speed at a constant rate of change, and controlling the engine output torque to decrease to a preset engine shutdown torque at a constant rate of change;

[0077] In this embodiment, when the vehicle is in the smooth shutdown mode, controlling the generator speed to continuously decrease from the current generator speed to the preset generator shutdown speed at a constant rate of change, and synchronously controlling the engine output torque to continuously decrease from the current engine output torque to the preset engine shutdown torque at a constant rate of change. When it is determined that the engine enters the idle state, stop fuel supply to the engine. Among them, the preset generator shutdown speed and the preset engine shutdown torque can be determined according to the actual situation and the vehicle calibration results, etc., and this embodiment does not limit this. Exemplarily, the preset generator shutdown speed can be the idle speed, and the preset engine shutdown torque can be 0.

[0078] Optionally, the current state information includes the current power generation, the current generator speed, and the current engine output torque. The steps of controlling the generator speed to decrease to a preset generator shutdown speed at a constant rate of change and the engine output torque to decrease to a preset engine shutdown torque include:

[0079] Step A211, determining the target speed regulation time corresponding to the current power generation;

[0080] In this embodiment, after obtaining the current power generation of the range extender, a model look-up is performed through the current range extender power generation to determine the target speed regulation time required for the range extender to drop to idle speed. Among them, the corresponding relationship between the power generation and the speed regulation time can be determined in advance through vehicle calibration.

[0081] In an implementable manner, the mapping relationship between the range extender power generation P and the speed regulation time is shown in Table 1 below:

[0082] Table 1

[0083]

[0084] Step A212, determining the speed drop slope according to the current generator speed, the preset generator shutdown speed, and the target speed regulation time, and determining the torque drop slope according to the current engine output torque, the preset engine shutdown torque, and the target speed regulation time;

[0085] In this embodiment, according to the current generator speed, the preset generator shutdown speed, and the target speed regulation time, the speed drop slope corresponding to the drop from the current generator speed to the preset generator shutdown speed within the target speed regulation time is calculated, and according to the current engine output torque, the preset engine shutdown torque, and the target speed regulation time, the torque drop slope corresponding to the drop from the current engine output torque to the preset engine shutdown torque within the target speed regulation time is calculated.

[0086] Exemplarily, the algorithm for calculating the speed drop slope is:

[0087] Speed drop slope = (current generator speed - preset generator shutdown speed) / target speed regulation time.

[0088] Exemplarily, the algorithm for calculating the torque drop slope is:

[0089] Torque drop slope = (current engine output torque - preset engine shutdown torque) / target speed regulation time.

[0090] Step A213, control the generator speed to decrease at a constant rate of change to a preset generator shutdown speed based on the speed decrease slope, and control the engine output torque to decrease at a constant rate of change to a preset engine shutdown torque based on the torque decrease slope.

[0091] In this embodiment, use the speed decrease slope as the rate of change of the generator speed decrease, control the generator speed to decrease at a constant acceleration at a constant rate of change to a preset generator shutdown speed, and use the torque decrease slope as the rate of change of the engine output torque decrease, control the engine output torque to decrease at a constant rate at a constant rate of change to a preset engine shutdown torque.

[0092] Step A22, in the fast shutdown mode, control the engine to cut off fuel supply so that the generator speed decreases to a preset generator shutdown speed and the engine output torque decreases to a preset engine shutdown torque.

[0093] In this embodiment, when the vehicle is in the fast shutdown mode, stop fuel supply to the engine so that the generator speed quickly decreases to a preset generator shutdown speed within a short time and the engine output torque quickly decreases to a preset engine shutdown torque within a short time.

[0094] In this embodiment, since the noise and vibration conditions of the vehicle are different in different driving states. For example, when the vehicle is driving at a high speed, the wind noise is relatively large, and the noise generated by the engine operation is easily masked by the wind noise. That is, at this time, the overall noise of the vehicle mainly comes from the wind noise, and the driver's attention is more concentrated on the road conditions and the safe driving of the vehicle, so the perception of the engine noise is weak, but the driver is more sensitive to the vibration of the vehicle. When the vehicle is driving at a low speed, the wind noise is small, and the noise generated by the engine operation will stand out. That is, at this time, the overall noise of the vehicle mainly comes from the engine, and at this time the driver is relatively relaxed and more sensitive to the engine noise. Therefore, based on the actual perception of the external noise by the occupants in the vehicle under different scenarios and vehicle conditions, this application sets different range extender shutdown modes. Different range extender shutdown modes correspond to different shutdown strategies. First, the scenario is divided based on the current state information of the vehicle, and then different range extender shutdown modes are adaptively matched. For the scenario where the vehicle speed is low and the engine noise is obvious, the throttle is controlled to reduce the vehicle jitter and noise, and at the same time, the engine is quickly shut down to minimize the impact of the engine noise. For the scenario where the vehicle speed is at an intermediate stage, that is, there may be a large difference in the proportion of the influence weights of the engine noise, wind noise, and the driver's attention on the actual perception of the external noise by the occupants in the vehicle, the driver's intention to actively shut down the range extender is considered first. For the scenario where the vehicle speed is high, the wind noise is large, the engine noise is not obvious, and the perception of the vehicle's slight jitter is more obvious, by controlling the throttle and controlling the engine torque and generator speed to decrease at a constant change rate, the vehicle shutdown jitter can be effectively reduced, and at the same time, the power generation can be increased by using inertia.

[0095] Embodiment III

[0096] Furthermore, the embodiment of this application also provides a range extender shutdown control device. Referring to Figure 5 , the range extender shutdown control device includes:

[0097] An acquisition module, configured to acquire the current state information of the vehicle;

[0098] A control module, configured to control the shutdown of the range extender according to the current state information, and when the engine runs out of fuel, control the throttle opening to maintain at a preset throttle opening.

[0099] Optionally, the control module is further configured to:

[0100] Determine a target shutdown mode according to the current state information, where the target shutdown mode includes a quick shutdown mode and a smooth shutdown mode;

[0101] Based on the target shutdown mode, control the shutdown of the range extender.

[0102] Optionally, the control module is further configured to:

[0103] When the current vehicle speed is less than a preset first vehicle speed threshold, determine that the target shutdown mode is a quick shutdown mode;

[0104] When the current vehicle speed is greater than a preset second vehicle speed threshold, determine that the target shutdown mode is a gentle shutdown mode.

[0105] Optionally, the control module is further configured to:

[0106] When the current vehicle speed is greater than or equal to the preset first vehicle speed threshold and less than the preset second vehicle speed threshold, determine whether there is a driver's switching operation of the vehicle operating mode based on the vehicle operating mode switching information;

[0107] If so, determine that the target shutdown mode is a quick shutdown mode;

[0108] If not, determine that the target shutdown mode is a gentle shutdown mode.

[0109] Optionally, the control module is further configured to:

[0110] In the gentle shutdown mode, control the generator speed to decrease to a preset generator shutdown speed at a constant rate of change, and control the engine output torque to decrease to a preset engine shutdown torque at a constant rate of change;

[0111] In the quick shutdown mode, control the engine to cut off fuel so that the generator speed decreases to a preset generator shutdown speed and the engine output torque decreases to a preset engine shutdown torque.

[0112] Optionally, the control module is further configured to:

[0113] Determine the target speed regulation time corresponding to the current power generation power;

[0114] According to the current generator speed, the preset generator shutdown speed, and the target speed regulation time, determine the speed decrease slope, and according to the current engine output torque, the preset engine shutdown torque, and the target speed regulation time, determine the torque decrease slope;

[0115] Based on the speed decrease slope, control the generator speed to decrease to the preset generator shutdown speed at a constant rate of change, and based on the torque decrease slope, control the engine output torque to decrease to the preset engine shutdown torque at a constant rate of change.

[0116] Optionally, after the step of controlling the range extender to shut down according to the current state information and controlling the throttle opening to maintain at a preset throttle opening when the engine cuts off fuel, the range extender shutdown control device further includes a release control module, and the release control module is further configured to:

[0117] When the time when the engine speed is maintained within a preset idle speed range reaches a preset time threshold, the control of the throttle opening is released.

[0118] The range extender shutdown control device provided by the present invention adopts the range extender shutdown control method in the above embodiment, and solves the technical problem that the vehicle will be accompanied by vibration and noise during the shutdown process of the existing range extender. Compared with the prior art, the beneficial effects of the range extender shutdown control device provided by the embodiments of the present invention are the same as those of the range extender shutdown control method provided by the above embodiment, and other technical features in the range extender shutdown control device are the same as those disclosed in the method of the above embodiment, and will not be elaborated herein.

[0119] Embodiment 4

[0120] Further, an embodiment of the present invention provides an electronic device, which includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein, the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the range extender shutdown control method in the above embodiment.

[0121] Next, refer to Figure 6 , which shows a schematic structural diagram of an electronic device suitable for implementing the embodiments of the present disclosure. The electronic device in the embodiments of the present disclosure may include, but is not limited to, mobile terminals such as Bluetooth headsets, mobile phones, laptop computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Tablet Computers), PMPs (Portable Multimedia Players), vehicle terminals (such as vehicle navigation terminals), etc., and fixed terminals such as digital TVs, desktop computers, etc. Figure 6 The electronic device shown is only an example, and should not impose any limitation on the functions and usage scope of the embodiments of the present disclosure.

[0122] As Figure 6 shown, the electronic device may include a processing device (such as a central processing unit, a graphics processing unit, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) or a program loaded from a storage device into a random access memory (RAM). In the RAM, various programs and arrays required for the operation of the electronic device are also stored. The processing device, ROM, and RAM are connected to each other through a bus. The input / output (I / O) interface is also connected to the bus.

[0123] Generally, the following systems can be connected to the I / O interface: input devices including, for example, a touch screen, a touchpad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; output devices including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc.; storage devices including, for example, a magnetic tape, a hard disk, etc.; and a communication device. The communication device can allow the electronic device to communicate with other devices wirelessly or wiredly to exchange data. Although the figure shows an electronic device having various systems, it should be understood that it is not required to implement or have all the shown systems. Instead, more or fewer systems can be implemented or had.

[0124] Specifically, according to an embodiment of the present disclosure, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, an embodiment of the present disclosure includes a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes program codes for performing the methods shown in the flowcharts. In such an embodiment, the computer program can be downloaded and installed from a network through the communication device, or installed from a storage device, or installed from a ROM. When the computer program is executed by a processing device, the above-mentioned functions defined in the methods of the embodiments of the present disclosure are performed.

[0125] The electronic device provided by the present invention adopts the extender shutdown control method in the above embodiment, and solves the technical problem that the vehicle will be accompanied by vibration and noise during the shutdown process of the extender in the prior art. Compared with the prior art, the beneficial effects of the electronic device provided by the embodiment of the present invention are the same as those of the extender shutdown control method provided by the above embodiment, and other technical features in the electronic device are the same as those disclosed in the method of the above embodiment, and will not be elaborated here.

[0126] It should be understood that each part of the present disclosure can be implemented by hardware, software, firmware or a combination thereof. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in a suitable manner in any one or more embodiments or examples.

[0127] As described above, only the specific embodiments of the present invention are provided, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, and all should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

[0128] Embodiment 5

[0129] Furthermore, this embodiment provides a computer-readable storage medium having computer-readable program instructions stored thereon for performing the extender shutdown control method in the above embodiment.

[0130] The computer-readable storage medium provided by the embodiments of the present invention may be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or components, or any combination of the above. More specific examples of the computer-readable storage medium may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this embodiment, the computer-readable storage medium may be any tangible medium that contains or stores a program, and the program can be used by or in combination with an instruction execution system, device, or component. The program code contained on the computer-readable storage medium can be transmitted by any suitable medium, including but not limited to: wires, optical cables, RF (radio frequency), etc., or any suitable combination of the above.

[0131] The above computer-readable storage medium may be included in an electronic device; or may exist separately without being assembled into the electronic device.

[0132] The above computer-readable storage medium carries one or more programs. When the one or more programs are executed by an electronic device, the electronic device is caused to: obtain the current state information of the vehicle; control the range extender to stop according to the current state information, and when the engine runs out of fuel, control the throttle opening to maintain at a preset throttle opening.

[0133] Computer program code for performing the operations of the present disclosure may be written in one or more programming languages or combinations thereof. The above programming languages include object-oriented programming languages - such as Java, Smalltalk, C++, and also include conventional procedural programming languages - such as the "C" language or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, executed as a stand-alone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network - including a local area network (LAN) or a wide area network (WAN) - or may be connected to an external computer (for example, by using an Internet service provider to connect through the Internet).

[0134] The flowcharts and block diagrams in the accompanying drawings illustrate the possible architectures, functions, and operations of systems, methods, and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagram may represent a module, a segment of a program, or a part of code that contains one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in a different order than that marked in the accompanying drawings. For example, two consecutive blocks shown may actually be executed substantially in parallel, and they may sometimes be executed in the reverse order, depending on the functions involved. It should also be noted that each block in the block diagram and / or flowchart, as well as combinations of blocks in the block diagram and / or flowchart, may be implemented by a dedicated hardware-based system that performs the specified functions or operations, or may be implemented by a combination of dedicated hardware and computer instructions.

[0135] The modules involved in the embodiments described in this disclosure can be implemented in software or in hardware. In some cases, the name of the module does not constitute a limitation on the unit itself.

[0136] The computer-readable storage medium provided by the present invention stores computer-readable program instructions for executing the above-described range extender shutdown control method, and solves the technical problem that the vehicle will be accompanied by vibration and noise during the shutdown process of the existing range extender. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided by the embodiments of the present invention are the same as those of the range extender shutdown control method provided by the above embodiments, and will not be elaborated here.

[0137] Embodiment Six

[0138] Furthermore, the present application also provides a computer program product, including a computer program, and when the computer program is executed by a processor, it implements the steps of the range extender shutdown control method as described above.

[0139] The computer program product provided by the present application solves the technical problem that the vehicle will be accompanied by vibration and noise during the shutdown process of the existing range extender. Compared with the prior art, the beneficial effects of the computer program product provided by the embodiments of the present invention are the same as those of the range extender shutdown control method provided by the above embodiments, and will not be elaborated here.

[0140] The above are only the preferred embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structural or equivalent process transformation made by using the content of the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, shall be included in the patent scope of the present application by the same token.

Claims

1. A range extender shutdown control method, characterized in that: The range extender shutdown control method comprises the following steps: Get the current status information of the vehicle; Determining a target shutdown mode according to the current state information, wherein the target shutdown mode includes a fast shutdown mode and a smooth shutdown mode; Based on the target shutdown mode, the range extender is controlled to shut down, and when the engine fuel is cut off, the throttle opening is controlled to maintain the throttle opening at a preset throttle opening so that the throttle does not open and close freely; The current state information includes the current vehicle speed and vehicle operation mode switching information. The step of determining the target shutdown mode according to the current state information includes: When the current vehicle speed is greater than or equal to a preset first vehicle speed threshold and less than a preset second vehicle speed threshold, determining whether there is a driver switching operation of the vehicle operating mode based on the vehicle operating mode switching information; If so, determining that the target shutdown mode is the fast shutdown mode; If not, the target shutdown mode is determined to be the smooth shutdown mode.

2. The range extender shutdown control method according to claim 1, characterized in that: The step of determining the target shutdown mode according to the current state information includes: When the current vehicle speed is less than a preset first vehicle speed threshold, determining the target shutdown mode to be a fast shutdown mode; When the current vehicle speed is greater than a preset second vehicle speed threshold, the target shutdown mode is determined to be the gentle shutdown mode.

3. The range extender shutdown control method according to claim 1, wherein: The step of controlling the range extender to shut down based on the target shutdown mode includes: In the smooth shutdown mode, the generator speed is controlled to decrease to the preset generator shutdown speed at a constant rate of change, and the engine output torque is controlled to decrease to the preset engine shutdown torque at a constant rate of change; In the fast shutdown mode, the engine is controlled to cut off fuel so that the generator speed drops to a preset generator shutdown speed and the engine output torque drops to a preset engine shutdown torque.

4. The range extender shutdown control method according to claim 3, characterized in that: The current state information includes current generated power, current generator speed, and current engine output torque. The step of controlling the generator speed to decrease at a constant rate of change to a preset generator shutdown speed and the engine output torque to decrease at a constant rate of change to a preset engine shutdown torque comprises: Determining a target speed regulation time corresponding to the current generated power; determining a speed reduction slope based on the current generator speed, the preset generator shutdown speed, and the target speed regulation time, and determining a torque reduction slope based on the current engine output torque, the preset engine shutdown torque, and the target speed regulation time; The generator speed is controlled to decrease to a preset generator stop speed at a constant rate based on the speed decrease slope, and the engine output torque is controlled to decrease to a preset engine stop torque at a constant rate based on the torque decrease slope.

5. The range extender shutdown control method according to any one of claims 1 to 4, characterized in that: After the step of controlling the range extender to shut down based on the target shutdown mode and controlling the throttle opening to maintain at a preset throttle opening when the engine is fuel-cut off, the method further includes: When it is detected that the time during which the engine speed is maintained in the preset idle speed range reaches a preset time threshold, the control of the throttle opening is released.

6. A range extender shutdown control device, characterized in that: The range extender shutdown control device includes: Acquisition module, used to obtain the current status information of the vehicle; a control module configured to determine a target shutdown mode based on the current state information, wherein the target shutdown mode includes a rapid shutdown mode and a gentle shutdown mode; control the range extender to shut down based on the target shutdown mode, and take over control of the throttle opening when the engine is cut off from fuel, controlling the throttle opening to maintain the throttle opening at a preset throttle opening so that the throttle does not open or close freely; The current state information includes the current vehicle speed and vehicle operation mode switching information, and the control module is further configured to: When the current vehicle speed is greater than or equal to a preset first vehicle speed threshold and less than a preset second vehicle speed threshold, determining whether there is a driver switching operation of the vehicle operating mode based on the vehicle operating mode switching information; If so, determining that the target shutdown mode is the fast shutdown mode; If not, the target shutdown mode is determined to be the smooth shutdown mode.

7. An electronic device, characterized in that: The electronic device comprises: at least one processor; and, a memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the steps of the range extender shutdown control method according to any one of claims 1 to 5.

8. A storage medium, characterized in that: The storage medium is a computer-readable storage medium, on which a program for implementing the range extender shutdown control method is stored. The program for implementing the range extender shutdown control method is executed by a processor to implement the steps of the range extender shutdown control method according to any one of claims 1 to 5.

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