Vehicle speed limiting method and device, vehicle and storage medium

Abstract

The invention relates to the technical field of vehicles, in particular to a vehicle speed limiting method and device, a vehicle and a storage medium, and the method comprises the steps that whether the current vehicle meets the running speed limiting starting condition or not is judged; if the current vehicle meets the running speed limiting starting condition, a running speed limiting system is started, the current vehicle speed and the opening degree of an accelerator pedal are obtained, a current vehicle speed correction value is determined according to the current vehicle speed, and a target limiting vehicle speed is determined according to the current vehicle speed correction value, a preset minimum limiting vehicle speed and a preset maximum limiting vehicle speed; and a speed limiting strategy is determined according to the current vehicle speed, the accelerator pedal opening degree and the target limiting vehicle speed, and speed limiting processing is conducted on the current vehicle according to the speed limiting strategy. Therefore, the problem that safety risks are easily generated due to human negligence, environmental interference and limitation of technical auxiliary means in a speed limiting mode in the related technology is solved, and through the speed limiting control system, the overspeed risk can be effectively avoided, the fatigue of a driver is relieved, and unnecessary vehicle speed fluctuation is reduced.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a vehicle speed limiting method, device, vehicle, and storage medium. Background Art

[0002] The contradiction between the current surge in the number of motor vehicles and the shortage of road resources is becoming increasingly prominent. Speeding is one of the important causes of traffic accidents, especially in congested roads or when drivers lack experience, the risk of operational errors increases significantly.

[0003] Related technologies rely on drivers to observe traffic signs and limit speeds automatically. However, this speed-limiting method that relies on drivers to observe traffic signs has problems such as human negligence, environmental interference, and limitations of technical assistance methods, making it difficult to meet the safety and efficiency requirements of modern transportation. Summary of the Invention

[0004] The present application provides a vehicle speed limiting method, device, vehicle and storage medium to address the speed limiting methods of related technologies, which are prone to safety risks due to human negligence, environmental interference and the limitations of technical assistance means. The speed limit control system avoids the risk of speeding, reduces driver fatigue, reduces unnecessary speed fluctuations, and also helps to improve the vehicle's fuel economy.

[0005] A first embodiment of the present application provides a vehicle speed limiting method, comprising the following steps:

[0006] Determine whether the current vehicle meets the speed limit activation conditions;

[0007] If the current vehicle meets the driving speed limit activation condition, the driving speed limit system is activated, and the current vehicle speed and accelerator pedal opening are obtained, and a current vehicle speed correction value is determined based on the current vehicle speed, and a target vehicle speed limit is determined based on the current vehicle speed correction value, a preset minimum vehicle speed limit, and a preset maximum vehicle speed limit;

[0008] A speed limit strategy is determined according to the current vehicle speed, the accelerator pedal opening, and the target vehicle speed limit, and speed limit processing is performed on the current vehicle according to the speed limit strategy.

[0009] Optionally, in some embodiments, determining a speed limit strategy based on the current vehicle speed, the accelerator pedal opening, and the target speed limit, and performing speed limit processing on the current vehicle according to the speed limit strategy includes:

[0010] When the current vehicle speed is between a preset motor torque limit start speed and the target limit vehicle speed, converting the current torque to a first limit inhibition torque according to a first inhibition strategy, and controlling the vehicle according to the first limit inhibition torque;

[0011] When the current vehicle speed is greater than the target limit vehicle speed, the current torque is converted to a second limit restraint torque according to a second restraint strategy, and the vehicle is controlled according to the second limit restraint torque.

[0012] Optionally, in some embodiments, determining a speed limit strategy based on the current vehicle speed, the accelerator pedal opening, and the target speed limit, and performing speed limit processing on the current vehicle according to the speed limit strategy includes:

[0013] When the accelerator pedal opening is greater than an accelerator pedal opening threshold corresponding to the current vehicle speed, the current driver demand torque is determined, and the vehicle is controlled according to the current driver demand torque.

[0014] Optionally, in some embodiments, after controlling the vehicle according to the current driver demand torque, the method further includes:

[0015] Obtaining the real-time speed of the vehicle;

[0016] When the real-time vehicle speed is less than a preset hysteresis speed, the current torque is converted to a third limited inhibition torque according to a third inhibition strategy, and the current vehicle is speed-limited according to the third limited inhibition torque.

[0017] Optionally, in some embodiments, after determining the target vehicle speed limit according to the current vehicle speed correction value, the preset minimum vehicle speed limit, and the preset maximum vehicle speed limit, the following steps are performed:

[0018] determining whether a target speed limit adjustment instruction from the driver has been received;

[0019] If a target vehicle speed limit adjustment instruction from the driver is received, the target vehicle speed limit is adjusted according to the target vehicle speed limit adjustment instruction.

[0020] A second embodiment of the present application provides a vehicle speed limiting device, comprising:

[0021] A judgment module is used to judge whether the current vehicle meets the speed limit activation conditions;

[0022] a determination module, configured to activate the speed limit system when the current vehicle meets the speed limit activation condition, obtain the current vehicle speed and accelerator pedal opening, determine a current vehicle speed correction value based on the current vehicle speed, and determine a target vehicle speed limit based on the current vehicle speed correction value, a preset minimum vehicle speed limit, and a preset maximum vehicle speed limit;

[0023] The speed limit module is used to determine a speed limit strategy according to the current vehicle speed, the accelerator pedal opening and the target speed limit, and perform speed limit processing on the current vehicle according to the speed limit strategy.

[0024] Optionally, in some embodiments, the rate limiting module includes:

[0025] a first control unit configured to, when the current vehicle speed is between a preset motor torque limit start speed and the target speed limit, convert the current torque to a first limit inhibition torque according to a first inhibition strategy, and control the vehicle according to the first limit inhibition torque;

[0026] The second control unit is configured to, when the current vehicle speed is greater than the target limit vehicle speed, convert the current torque to a second limit restraint torque according to a second restraint strategy, and control the vehicle according to the second limit restraint torque.

[0027] Optionally, in some embodiments, the rate limiting module includes:

[0028] The third control unit is configured to determine the current driver demand torque when the accelerator pedal opening is greater than an accelerator pedal opening threshold corresponding to the current vehicle speed, and control the vehicle according to the current driver demand torque.

[0029] Optionally, in some embodiments, after controlling the vehicle according to the current driver demand torque, the third control unit includes:

[0030] An acquisition subunit, configured to acquire the real-time speed of the vehicle;

[0031] The speed limiting subunit is configured to, when the real-time vehicle speed is less than a preset hysteresis speed, convert the current torque to a third limited inhibition torque according to a third inhibition strategy, and perform speed limiting processing on the current vehicle according to the third limited inhibition torque.

[0032] Optionally, in some embodiments, after determining the target vehicle speed limit according to the current vehicle speed correction value, the preset minimum vehicle speed limit, and the preset maximum vehicle speed limit, the determining module includes:

[0033] a determination unit, configured to determine whether a target speed limit adjustment instruction from the driver has been received;

[0034] The adjusting unit is configured to adjust the target vehicle speed limit according to the target vehicle speed limit adjustment instruction when receiving the target vehicle speed limit adjustment instruction from the driver.

[0035] A third aspect of the present application provides a vehicle, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the vehicle speed limiting method as described in the above embodiment.

[0036] A fourth aspect of the present application provides a computer-readable storage medium having a computer program stored thereon, which is executed by a processor to implement the vehicle speed limiting method as described in the above embodiment.

[0037] Thus, by determining whether the current vehicle meets the speed limit activation conditions, if the current vehicle meets the speed limit activation conditions, the speed limit system is activated, and the current vehicle speed and accelerator pedal opening are obtained. The current vehicle speed correction value is determined based on the current vehicle speed, and the target speed limit is determined based on the current speed correction value, the preset minimum speed limit, and the preset maximum speed limit. The speed limit strategy is determined based on the current vehicle speed, the accelerator pedal opening, and the target speed limit, and the speed limit processing is performed on the current vehicle according to the speed limit strategy. This solves the problem that the speed limit method of the related art is prone to safety risks due to human negligence, environmental interference, and the limitations of technical auxiliary means. The speed limit control system can effectively avoid the risk of speeding, reduce driver fatigue, and reduce unnecessary speed fluctuations.

[0038] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0040] Figure 1 A schematic diagram of a vehicle control system provided according to one embodiment of the present application;

[0041] Figure 2 A schematic diagram of a network architecture of a vehicle provided according to one embodiment of the present application;

[0042] Figure 3 A flowchart of a vehicle speed limiting method provided according to an embodiment of the present application;

[0043] Figure 4 A schematic diagram of the principle of a vehicle speed limiting method provided according to an embodiment of the present application;

[0044] Figure 5 A schematic diagram of the principle of a vehicle speed limiting method provided according to another embodiment of the present application;

[0045] Figure 6Schematic diagram of a vehicle speed limiter according to an embodiment of the present application;

[0046] Figure 7 A schematic structural diagram of a vehicle according to an embodiment provided in the present application. DETAILED DESCRIPTION

[0047] The following describes in detail embodiments of the present application, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0048] The following describes the vehicle speed limit method, device, vehicle, and storage medium of the embodiment of the present application with reference to the accompanying drawings. In response to the problem that the speed limit method of the related art mentioned in the background art is prone to safety risks due to human negligence, environmental interference, and limitations of technical assistance means, the present application provides a vehicle speed limit method. In this method, by determining whether the current vehicle meets the driving speed limit activation conditions, if the current vehicle meets the driving speed limit activation conditions, the driving speed limit system is activated, and the current vehicle speed and accelerator pedal opening are obtained. The current vehicle speed correction value is determined based on the current vehicle speed. The target speed limit is determined based on the current vehicle speed correction value, the preset minimum speed limit, and the preset maximum speed limit. The speed limit strategy is determined based on the current vehicle speed, the accelerator pedal opening, and the target speed limit, and the speed limit processing is performed on the current vehicle according to the speed limit strategy. Thus, the problem that the speed limit method of the related art is prone to safety risks due to human negligence, environmental interference, and limitations of technical assistance means is solved. Through the speed limit control system, the risk of speeding can be effectively avoided, driver fatigue can be reduced, and unnecessary speed fluctuations can be reduced.

[0049] Before introducing the vehicle speed limiting method of the embodiment of the present application, the vehicle speed limiting control system of the embodiment of the present application is first introduced. Figure 1As shown, the vehicle speed limit control system is divided into four control modules, including a speed limit activation pre-confirmation module, a functional operating condition control module, a power control module, and an instrument display and voice reminder module. Among them, (1) the speed limit activation pre-confirmation module ensures that the speed limiter function can be independently controlled through the preset smart cruise switch setting strategy. The driver can enable the speed limit function and set the speed limit value in the following ways: ① operate the speed limiter switch or button on the vehicle dashboard to turn on or off the speed limit function, and set the specific speed limit value through the knob or touch screen; ② use voice commands (such as "set the speed limit to 100 kilometers per hour") to turn on the speed limit function and set the speed limit value. The vehicle speed limit system of the embodiment of the present application can have an efficient voice recognition algorithm and noise suppression technology to ensure that the command can be accurately recognized even in a complex driving environment. (2) The functional operating condition module is used to monitor the target speed limit and functional system status in real time, and realize operating condition classification, operating condition jump and operating condition execution. (3) The power control module controls the motor output torque based on the current functional working condition to achieve the target speed limit. Under the speed limit working condition, even if the driver steps on the accelerator pedal, the system will automatically limit the vehicle speed to not exceed the set speed limit value. (4) The instrument and voice module includes a display module and a voice module. The display module displays the working status of the speed limiter function, the speed limit status, and the speed limit of the vehicle to achieve human-computer interaction. The voice module enables the voice control function to be turned on and off, and the voice synthesis technology provides the driver with feedback on the operation results.

[0050] In addition, the network topology of the embodiment of the present application is as follows Figure 2 As shown, in the embodiment of the present application, the vehicle speed limit control system is ensured to exist as an independent subsystem and is not directly affected by other cruise control functions. Through independent software modules and hardware interfaces, modular programming is adopted to encapsulate the system into an independent software module, and communicate with the main controller through a standard communication interface (such as CAN bus) to realize direct reception and execution of speed limit instructions.

[0051] Specifically, Figure 3 A schematic flow chart of a vehicle speed limiting method provided in an embodiment of the present application.

[0052] like Figure 3 As shown, the vehicle speed limiting method includes the following steps:

[0053] In step S101, it is determined whether the current vehicle meets the speed limit activation condition.

[0054] Among them, the conditions for activating the speed limit are: the vehicle control system is ready, and the current vehicle does not have the first type of fault, and the intelligent cruise system meets the preset conditions, and the current vehicle is in power gear, and the current vehicle does not have the second type of fault, and the current vehicle has a speed limit demand.

[0055] It should be noted that, in the embodiment of the present application, the vehicle speed limit control system includes three working modes, namely, an off state, a paused state, and an on state. (1) When the speed limiter function is in the off state, the speed limiter system monitors the vehicle speed and the opening behavior in real time, but does not perform speed limit control; ② When the speed limiter function is in the paused state, the speed limiter system monitors the vehicle speed and the closing behavior in real time, but does not perform speed limit control; ③ When the speed limiter function is in the on state, the speed limiter system monitors the vehicle speed and the accelerator pedal opening in real time and performs speed limit control.

[0056] Specifically, combined Figure 4 As shown, the current vehicle needs to perform a self-check of the vehicle control system to determine whether the vehicle control system is in the Ready state. If the vehicle control system is not in the Ready state, the speed limit system is controlled to be in the Off state, and fault diagnosis and vehicle protection are performed. If the vehicle control system is in the Ready state, it is determined whether the vehicle has a torque limit or power limit fault.

[0057] If the vehicle has a torque or power limiting fault, the speed limit system is controlled to be in the off state; if the vehicle is in a fault recovery or no-fault state, it is determined whether the intelligent cruise system meets the preset condition requirements, where the preset condition requirements are pre-set by relevant personnel.

[0058] If the smart cruise system does not meet the preset conditions, the speed limit system is controlled to be in the off state. If the smart cruise system meets the preset conditions, it is determined whether the current vehicle is in the power gear.

[0059] If the vehicle is in a non-power gear, the speed limit system is controlled to be in an off state; if the vehicle is currently in a power gear, it is determined whether the hardware related to the speed limit control switch or the intelligent road sign recognition system or the voice recognition system is faulty.

[0060] If the hardware related to the speed limit control switch or the intelligent road sign recognition system or voice recognition system fails, the speed limit system will be controlled to be in the off state; otherwise, if there is no fault, it will be determined whether the current vehicle has a speed limit driving demand. If the vehicle has a speed limit driving demand, the current vehicle meets the speed limit activation conditions.

[0061] In step S102, if the current vehicle meets the speed limit activation conditions, the speed limit system is activated, and the current vehicle speed and accelerator pedal opening are obtained. The current vehicle speed correction value is determined based on the current vehicle speed, and the target speed limit is determined based on the current speed correction value, the preset minimum speed limit, and the preset maximum speed limit.

[0062] The preset minimum speed limit and the preset maximum speed limit may be pre-set by the user, obtained through a limited number of experiments, or obtained through a limited number of computer simulations, and are not specifically limited here.

[0063] Specifically, when the current vehicle meets the speed limit activation conditions, the speed limit system is turned on, and the current vehicle speed and accelerator pedal opening are obtained. The current vehicle speed is multiplied by a preset correction coefficient to obtain the current vehicle speed correction value. According to the relationship between the current vehicle speed correction value, the preset minimum speed limit and the preset maximum speed limit, the target speed limit is set. Specifically, if the current vehicle speed correction value is less than the system preset minimum speed limit, the preset minimum speed limit is set as the target speed limit; if the current vehicle speed correction value is between the system preset minimum speed limit and the preset maximum speed limit, the current corrected speed is set as the target speed limit; when the current vehicle speed correction value is greater than the system preset maximum speed limit, the system maximum speed limit is set as the target speed limit.

[0064] Optionally, in some embodiments, after determining the target speed limit based on the current speed correction value, the preset minimum speed limit and the preset maximum speed limit, it includes: determining whether a target speed limit adjustment instruction from the driver is received; if a target speed limit adjustment instruction from the driver is received, adjusting the target speed limit according to the target speed limit adjustment instruction.

[0065] Specifically, the system needs to monitor in real time whether there is any target speed limit adjustment instruction input by the driver. The target speed limit adjustment instruction can be input in a variety of ways, such as through the control buttons in the car, voice commands or central control screen operations. If the system detects that the driver has input a new target speed limit, the system will adjust the vehicle's target speed limit according to the new target speed limit.

[0066] It should be noted that in the embodiment of the present application, priorities can be set between different control strategies and speed limit strategies. When the vehicle is not equipped with an assisted driving system such as ADAS (Advanced Driver Assistance Systems), the target speed limit is determined in the above manner. When the vehicle is equipped with an assisted driving system such as ADAS, the assisted driving system is set to the highest priority. The ADAS system will determine whether the speed needs to be adjusted based on the current vehicle speed and the road condition information it recognizes (such as the speed limit value of the road sign, the distance from the speed measuring point, the road condition ahead, etc.). If the ADAS system determines that speed limit driving is required, it will dynamically adjust the target speed based on the speed correction value when it is turned on and the real-time road condition information, and control the actual driving speed of the vehicle by adjusting the engine torque.

[0067] In step S103, a speed limit strategy is determined based on the current vehicle speed, the accelerator pedal opening, and the target speed limit, and the speed limit process is performed on the current vehicle according to the speed limit strategy.

[0068] Further, combined with Figure 5 As shown, in some embodiments, a speed limit strategy is determined based on the current vehicle speed, the accelerator pedal opening and the target limit speed, and the current vehicle is speed-limited according to the speed limit strategy, including: when the current vehicle speed is between the preset motor torque limit start speed and the target limit speed, the current torque is converted to a first limit inhibition torque according to a first inhibition strategy, and the vehicle is controlled according to the first limit inhibition torque; when the current vehicle speed is greater than the target limit speed, the current torque is converted to a second limit inhibition torque according to a second inhibition strategy, and the vehicle is controlled according to the second limit inhibition torque. The first limit torque and the second limit torque can be determined by relevant personnel based on the current vehicle speed and the target limit speed.

[0069] Among them, the preset motor torque limit starting speed can be pre-set by the user, can be obtained through a limited number of experiments, or can be obtained through a limited number of computer simulations. No specific limitation is made here. The first suppression strategy is to adopt a first torque change rate to reduce the current torque, and the second suppression strategy is to adopt a second torque change rate to reduce the current torque, wherein the second torque change rate is higher than the first torque change rate. For example, the first suppression strategy is to reduce the current torque by 10 N·m per second until it is reduced to the first limit suppression torque, and the second suppression strategy is to reduce the current torque by 30 N·m per second.

[0070] It is understandable that when the current vehicle speed is about to reach the target speed limit, the vehicle can be speed-limited in advance to prevent unexpected speed fluctuations and achieve smooth deceleration. When the current vehicle speed is greater than the target speed limit, the speed can be reduced immediately to reduce the risk of speeding.

[0071] Specifically, when the current vehicle speed is between the preset motor torque limit starting speed and the target speed limit, that is, (the preset motor torque limit starting speed ≤ current vehicle speed ≤ target speed limit speed), the current vehicle torque is transitioned to the speed limit suppression target torque, and the negative torque part is not affected. The speed limit suppression target torque is reached at the target speed. The transition torque gradient uses a separate first torque gradient for smooth transition, and PID closed-loop torque control is used to prevent unexpected speed fluctuations.

[0072] When the current vehicle speed is greater than the target limit speed, it is necessary to decelerate immediately, convert the current torque to the second limit inhibition torque according to the second inhibition strategy, and control the vehicle according to the second limit inhibition torque.

[0073] Optionally, in some embodiments, a speed limit strategy is determined based on the current vehicle speed, the accelerator pedal opening and the target speed limit, and the current vehicle is speed-limited according to the speed limit strategy, including: when the accelerator pedal opening is greater than the accelerator pedal opening threshold corresponding to the current vehicle speed, determining the current driver demand torque, and controlling the vehicle according to the current driver demand torque.

[0074] Furthermore, in some embodiments, after controlling the vehicle according to the current driver demand torque, it includes: obtaining the real-time speed of the vehicle; when the real-time speed is less than the preset hysteresis speed, converting the current torque to a third limited suppression torque according to a third suppression strategy, and limiting the speed of the current vehicle according to the third limited suppression torque.

[0075] The preset hysteresis vehicle speed may be pre-set by the user, obtained through a limited number of experiments, or obtained through a limited number of computer simulations, which is not specifically limited here.

[0076] Specifically, the speed limiter function belongs to active speed limit control. When encountering special circumstances, the vehicle speed limit system can be suspended or turned off. For example, when the driver needs to accelerate to overtake or climb a hill, the driver will step on the accelerator pedal deeply, that is, the accelerator pedal opening is greater than the accelerator pedal opening threshold corresponding to the current vehicle speed (accelerator pedal opening ≥ deep pedal opening at different vehicle speeds). The speed limit torque closing flag is issued, and the speed limit control system should immediately transition the current torque to the current driver-required torque. Moreover, when the user actively reduces the vehicle speed to below the preset hysteresis speed, the speed limit torque opening flag is issued to control the vehicle to start the vehicle speed limit system and adjust the vehicle's current torque to a preset third limit inhibition torque.

[0077] In addition, when the current vehicle speed is lower than the target limit speed, when the driver gradually increases the accelerator pedal opening (accelerator pedal opening at stable speed limit < accelerator pedal opening < deep pedal opening at different vehicle speeds), the target torque transitions from the current torque to the driver's required torque; when the driver deeply steps on the accelerator pedal (accelerator pedal opening ≥ deep pedal opening at different vehicle speeds), and the torque limit start speed ≤ the current vehicle speed, the target torque transitions from the speed limit suppression target torque to the current driver's required torque, and the transition torque gradient uses the torque gradient alone, which is also controlled by the speed limit PID closed-loop torque control.

[0078] It should be noted that in addition to the above-mentioned forms of conversion of the three operating modes in the vehicle speed limit control system, the conversion from the open state to the pause state is mainly determined based on the rate of change of the accelerator pedal and the hysteresis range. At the same time, the hysteresis value of the vehicle speed (that is, the difference between the transition speed and the target speed) is also used as a reference factor; the conditions for the conversion from the pause state to the closed state are the same as the conditions for the conversion from the open state directly to the closed state; the conversion from the closed state to the pause state is determined based on the addition of the condition that the vehicle speed is greater than the target speed on the basis of satisfying the conditions for the conversion from the closed state to the open state.

[0079] In addition, the embodiment of the present application can use an ICM (Image Color Management) display system to remind the status of the speed limit control function, display it in large text on the main instrument panel for a certain period of time, and enhance human-computer interaction. In addition, a voice broadcast system is provided to timely broadcast the status of the speed limit control system to better remind the driver.

[0080] Therefore, through the vehicle speed limiting method of the embodiment of the present application, the driver can easily activate the speed limit function so that the vehicle travels according to the preset speed limit. In addition, once the speed limiter is activated, the driver can also flexibly adjust the speed limit by manual or voice control. By using the speed limiter, the driver does not need to keep an eye on the speedometer when driving on highways, urban ring roads or rural roads, and can ensure that the vehicle moves at a speed that complies with the road speed limit standards. This not only reduces the driver's fatigue and unnecessary speed fluctuations, but also helps to improve the vehicle's fuel economy, and can effectively avoid the risks of fines and violations that may arise from speeding, providing the driver with a more relaxed and safe driving experience.

[0081] According to the vehicle speed limit method proposed in the embodiment of the present application, by determining whether the current vehicle meets the speed limit activation conditions, if the current vehicle meets the speed limit activation conditions, the speed limit system is activated, and the current vehicle speed and accelerator pedal opening are obtained, and the current vehicle speed correction value is determined based on the current vehicle speed, and the target speed limit is determined based on the current vehicle speed correction value, the preset minimum speed limit, and the preset maximum speed limit. The speed limit strategy is determined based on the current vehicle speed, the accelerator pedal opening, and the target speed limit, and the current vehicle is speed-limited according to the speed limit strategy. Thus, the speed limit method of the related art is easily prone to safety risks due to human negligence, environmental interference, and the limitations of technical auxiliary means. By using the speed limit control system, the risk of speeding can be effectively avoided, driver fatigue can be reduced, and unnecessary speed fluctuations can be reduced.

[0082] Next, the vehicle speed limiting device proposed according to the embodiment of the present application will be described with reference to the accompanying drawings.

[0083] Figure 62 is a block diagram of a vehicle speed limiter according to an embodiment of the present application.

[0084] like Figure 6 As shown, the vehicle speed limiting device 10 includes: a judgment module 100 , a determination module 200 and a speed limiting module 300 .

[0085] The judgment module 100 is used to judge whether the current vehicle meets the speed limit activation condition.

[0086] Determination module 200, configured to activate the speed limit system when the current vehicle meets the speed limit activation conditions, obtain the current vehicle speed and accelerator pedal opening, determine a current speed correction value based on the current vehicle speed, and determine a target speed limit based on the current speed correction value, a preset minimum speed limit, and a preset maximum speed limit;

[0087] The speed limit module 300 is used to determine a speed limit strategy according to the current vehicle speed, the accelerator pedal opening and the target speed limit, and to perform speed limit processing on the current vehicle according to the speed limit strategy.

[0088] Optionally, in some embodiments, the speed limiting module 300 includes: a first control unit and a second control unit.

[0089] Among them, the first control unit is used to convert the current torque to a first limited suppression torque according to a first suppression strategy when the current vehicle speed is between a preset motor torque limit start speed and a target limited vehicle speed, and control the vehicle according to the first limited suppression torque.

[0090] The second control unit is configured to convert the current torque to a second limited inhibition torque according to a second inhibition strategy when the current vehicle speed is greater than the target limited vehicle speed, and control the vehicle according to the second limited inhibition torque.

[0091] Optionally, in some embodiments, the speed limiting module 300 includes: a third control unit.

[0092] Among them, the third control unit is used to determine the current driver demand torque when the accelerator pedal opening is greater than the accelerator pedal opening threshold corresponding to the current vehicle speed, and control the vehicle according to the current driver demand torque.

[0093] Optionally, in some embodiments, after controlling the vehicle according to the current driver demand torque, the third control unit includes: an acquisition subunit and a speed limiting subunit.

[0094] The acquisition subunit is used to obtain the real-time speed of the vehicle.

[0095] The speed limiting subunit is used to convert the current torque to a third limited inhibition torque according to the third inhibition strategy when the real-time vehicle speed is less than the preset hysteresis speed, and to limit the speed of the current vehicle according to the third limited inhibition torque.

[0096] Optionally, in some embodiments, after determining the target vehicle speed limit according to the current vehicle speed correction value, the preset minimum vehicle speed limit and the preset maximum vehicle speed limit, the determination module 200 includes: a judgment unit and an adjustment unit.

[0097] The determining unit is configured to determine whether a target speed limit adjustment instruction from the driver has been received.

[0098] The adjusting unit is configured to adjust the target vehicle speed limit according to the target vehicle speed limit adjustment instruction when receiving the target vehicle speed limit adjustment instruction from the driver.

[0099] It should be noted that the above explanations of the embodiment of the vehicle speed limiting method are also applicable to the vehicle speed limiting device of this embodiment, and will not be repeated here.

[0100] According to the vehicle speed limit device proposed in the embodiment of the present application, by determining whether the current vehicle meets the speed limit activation conditions, if the current vehicle meets the speed limit activation conditions, the speed limit system is activated, and the current vehicle speed and accelerator pedal opening are obtained. The current vehicle speed correction value is determined based on the current vehicle speed, and the target speed limit is determined based on the current speed correction value, the preset minimum speed limit, and the preset maximum speed limit. The speed limit strategy is determined based on the current vehicle speed, the accelerator pedal opening, and the target speed limit, and the current vehicle is speed-limited according to the speed limit strategy. In this way, the speed limit method of the related art is easily prone to safety risks due to human negligence, environmental interference, and the limitations of technical auxiliary means. The speed limit control system can effectively avoid the risk of speeding, reduce driver fatigue, and reduce unnecessary speed fluctuations.

[0101] Figure 7 A schematic diagram of the structure of a vehicle provided in an embodiment of the present application. The vehicle may include:

[0102] A memory 701 , a processor 702 , and a computer program stored in the memory 701 and executable on the processor 702 .

[0103] When the processor 702 executes the program, the vehicle speed limiting method provided in the above embodiment is implemented.

[0104] Furthermore, the vehicle further comprises:

[0105] The communication interface 703 is used for communication between the memory 701 and the processor 702 .

[0106] The memory 701 is used to store computer programs that can be run on the processor 702 .

[0107] The memory 701 may include a high-speed RAM (Random Access Memory) memory, and may also include a non-volatile memory, such as at least one disk memory.

[0108] If the memory 701, processor 702, and communication interface 703 are implemented independently, the communication interface 703, memory 701, and processor 702 can be connected to each other via a bus and communicate with each other. The bus can be an ISA (Industry Standard Architecture) bus, a PCI (Peripheral Component Interconnect) bus, or an EISA (Extended Industry Standard Architecture) bus. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 7 Only one thick line is used in the diagram, but this does not mean that there is only one bus or one type of bus.

[0109] Optionally, in a specific implementation, if the memory 701, the processor 702 and the communication interface 703 are integrated on a chip, the memory 701, the processor 702 and the communication interface 703 can communicate with each other through an internal interface.

[0110] The processor 702 may be a CPU (Central Processing Unit), or an ASIC (Application Specific Integrated Circuit), or one or more integrated circuits configured to implement the embodiments of the present application.

[0111] An embodiment of the present application also provides a computer-readable storage medium having a computer program stored thereon, which implements the above vehicle speed limiting method when executed by a processor.

[0112] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or N embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0113] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this application, "N" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0114] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may be performed out of the order shown or discussed, including performing functions in a substantially simultaneous manner or in reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present application belong.

[0115] It should be understood that various parts of the present application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiment, the N steps or methods can be implemented using software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented using hardware, as in another embodiment, any one of the following technologies known in the art or a combination thereof can be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application-specific integrated circuit having a suitable combination of logic gate circuits, a programmable gate array, a field programmable gate array, etc.

[0116] Those skilled in the art will understand that all or part of the steps in the method of the above embodiment can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium. When the program is executed, it includes one or a combination of the steps of the method embodiment.

[0117] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A vehicle speed limiting method, characterized in that: The following steps are involved: Determine whether the current vehicle meets the speed limit activation conditions; If the current vehicle meets the driving speed limit activation condition, the driving speed limit system is activated, and the current vehicle speed and accelerator pedal opening are obtained, and a current vehicle speed correction value is determined based on the current vehicle speed, and a target vehicle speed limit is determined based on the current vehicle speed correction value, a preset minimum vehicle speed limit, and a preset maximum vehicle speed limit; A speed limit strategy is determined according to the current vehicle speed, the accelerator pedal opening, and the target vehicle speed limit, and speed limit processing is performed on the current vehicle according to the speed limit strategy.

2. The method according to claim 1, characterized in that The determining of a speed limit strategy according to the current vehicle speed, the accelerator pedal opening, and the target speed limit, and performing speed limit processing on the current vehicle according to the speed limit strategy, includes: When the current vehicle speed is between a preset motor torque limit start speed and the target limit vehicle speed, converting the current torque to a first limit inhibition torque according to a first inhibition strategy, and controlling the vehicle according to the first limit inhibition torque; When the current vehicle speed is greater than the target limit vehicle speed, the current torque is converted to a second limit restraint torque according to a second restraint strategy, and the vehicle is controlled according to the second limit restraint torque.

3. The method according to claim 1, characterized in that The determining of a speed limit strategy according to the current vehicle speed, the accelerator pedal opening, and the target speed limit, and performing speed limit processing on the current vehicle according to the speed limit strategy, includes: When the accelerator pedal opening is greater than an accelerator pedal opening threshold corresponding to the current vehicle speed, the current driver demand torque is determined, and the vehicle is controlled according to the current driver demand torque.

4. The method according to claim 3, characterized in that After controlling the vehicle according to the current driver demand torque, the method includes: Obtaining the real-time speed of the vehicle; When the real-time vehicle speed is less than a preset hysteresis speed, the current torque is converted to a third limited inhibition torque according to a third inhibition strategy, and the current vehicle is speed-limited according to the third limited inhibition torque.

5. The method according to claim 1, wherein After determining the target vehicle speed limit according to the current vehicle speed correction value, the preset minimum vehicle speed limit, and the preset maximum vehicle speed limit, the method includes: determining whether a target speed limit adjustment instruction from the driver has been received; If a target vehicle speed limit adjustment instruction from the driver is received, the target vehicle speed limit is adjusted according to the target vehicle speed limit adjustment instruction.

6. A vehicle speed limiting device, characterized in that: include: A judgment module is used to judge whether the current vehicle meets the speed limit activation conditions; a determination module, configured to activate the speed limit system when the current vehicle meets the speed limit activation condition, obtain the current vehicle speed and accelerator pedal opening, determine a current vehicle speed correction value based on the current vehicle speed, and determine a target vehicle speed limit based on the current vehicle speed correction value, a preset minimum vehicle speed limit, and a preset maximum vehicle speed limit; The speed limit module is used to determine a speed limit strategy according to the current vehicle speed, the accelerator pedal opening and the target speed limit, and perform speed limit processing on the current vehicle according to the speed limit strategy.

7. The device according to claim 6, characterized in that The speed limiting module includes: a first control unit configured to, when the current vehicle speed is between a preset motor torque limit start speed and the target speed limit, convert the current torque to a first limit inhibition torque according to a first inhibition strategy, and control the vehicle according to the first limit inhibition torque; The second control unit is configured to, when the current vehicle speed is greater than the target limit vehicle speed, convert the current torque to a second limit restraint torque according to a second restraint strategy, and control the vehicle according to the second limit restraint torque.

8. The device according to claim 6, characterized in that The speed limiting module includes: The third control unit is configured to determine the current driver demand torque when the accelerator pedal opening is greater than an accelerator pedal opening threshold corresponding to the current vehicle speed, and control the vehicle according to the current driver demand torque.

9. A vehicle, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the vehicle speed limiting method according to any one of claims 1 to 5.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: The program is executed by a processor to implement the vehicle speed limiting method according to any one of claims 1 to 5.

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