Start-stop smooth control method, system, vehicle and equipment of heavy-duty vehicle
By dynamically controlling the motor's sleep mode based on the vehicle's parking status and load, the problem of jerking and impact during start-stop operation of heavy-duty vehicles has been solved, achieving smooth start-stop and improving driving safety and experience.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- ANHUI DEEPWAY TECHNOLOGY CO LTD
- Filing Date
- 2026-06-08
- Publication Date
- 2026-07-14
AI Technical Summary
Heavy-duty vehicles suffer from severe jerking and impact during start-stop operations. Traditional systems experience sudden torque changes during start-stop of the motor under heavy load conditions, leading to increased vehicle wear and poor adaptability of start-stop modes, which affects the driving experience.
Based on the vehicle's parking status and load, the motor's sleep mode is dynamically controlled. The motor torque is reduced through shallow, semi-deep, or deep sleep modes, and the motor torque is increased in combination with load control to optimize start-stop smoothness.
It improves the smoothness of starting and stopping heavy-duty vehicles, enhances driving safety and experience, reduces component wear, and optimizes power consumption.
Smart Images
Figure CN122379547A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of vehicle control technology, and in particular to a method, system, vehicle, and equipment for smooth start-stop control of heavy-duty vehicles. Background Technology
[0002] Currently, new energy heavy-duty trucks have been gradually applied to heavy-duty transportation scenarios. However, in practical applications, the following technical defects exist: First, the start-stop jerking and impact are severe under heavy loads. Under heavy load conditions, the torque of the motor changes abruptly at the moment of start-stop without a gradual transition, resulting in obvious jerking of the vehicle. Traditional systems bear instantaneous impact loads, and long-term use can easily aggravate component wear and loosening, shortening the service life of the core components of the vehicle. Second, the adaptability of the start-stop mode is poor. Existing solutions use a uniform sleep-wake logic for different vehicle loads and parking durations. This leads to frequent deep start-stops during short stops, further amplifying the transmission impact, while the motor remains in a shallow sleep state during long stops, causing unnecessary power consumption and affecting the driving experience. Summary of the Invention
[0003] Therefore, it is necessary to provide a method, system, vehicle, and equipment for smooth start-stop control of heavy-duty vehicles to address the aforementioned technical problems. This method can determine the motor sleep mode based on the vehicle's parking status and combine it with load dynamic control to increase or decrease torque, thereby improving the smoothness of start-stop of heavy-duty vehicles and enhancing driving safety and experience.
[0004] Firstly, a method for smooth start-stop control of heavy-duty vehicles is provided, including: Obtain the vehicle's load, speed, and brake pedal status; Based on the vehicle speed and brake pedal status, determine whether the vehicle has stopped; If so, determine whether the heavy-load start-stop smooth control conditions are met based on the load. If the conditions are met, the parking state of the vehicle is determined based on the duration of the brake pedal state, wherein the parking state includes short stop, medium stop and long stop. Based on the parking status, the motor is controlled to enter the corresponding sleep mode, and based on the load, the motor torque is controlled to decrease to zero. When a wake-up signal is received, low-temperature preheating and high-pressure precharging are performed, and the motor torque is increased according to the load. At the same time, the gearbox is pre-adjusted to complete the vehicle start-up.
[0005] In some examples, determining whether the vehicle has stopped based on the vehicle speed and the brake pedal state includes: When the vehicle speed is zero and the brake pedal is detected to be depressed, the vehicle is determined to be stopped.
[0006] In some examples, determining whether the heavy-load start-stop smooth control conditions are met based on the load includes: If the load is greater than the load threshold, the heavy load start-stop smooth control condition is determined to be met.
[0007] In some examples, determining the vehicle's parking state based on the duration of the brake pedal state includes: When the duration is less than the first time threshold, the vehicle is determined to be in a short stop state; When the duration exceeds the second time threshold, the vehicle is determined to be in a long-term stopped state. When the duration is between the first time threshold and the second time threshold, the vehicle is determined to be in a stopped state, wherein the first time threshold is less than the second time threshold.
[0008] In some examples, controlling the motor to enter a corresponding sleep mode based on the parking state includes: When the vehicle is in a short stop state, the control motor enters a shallow sleep mode; When the vehicle is in a stopped state, the control motor enters a semi-deep sleep mode; When the vehicle is in a long-term parked state, the control motor enters a deep sleep mode.
[0009] In some examples, it also includes: Real-time monitoring of battery current, motor torque fluctuations, and transmission system vibration data; If any of the battery current, motor torque fluctuations, or transmission system vibration data becomes abnormal, torque correction will be performed.
[0010] In some examples, it also includes: If the number of abnormal occurrences exceeds the preset limit, the system will switch to manual start / stop mode and issue a fault warning.
[0011] Secondly, a start-stop smooth control system for heavy-duty vehicles is provided, including: The acquisition module is used to acquire the vehicle's load, speed, and brake pedal status. The first judgment module is used to determine whether the vehicle has stopped based on the vehicle speed and the brake pedal status. The second judgment module is used to determine whether the heavy load start-stop smooth control conditions are met when the vehicle is parked, based on the load. The determination module is used to determine the parking state of the vehicle based on the duration of the brake pedal state when the heavy-load start-stop smooth control conditions are met. The parking state includes short stop, medium stop and long stop. The sleep control module is used to control the motor to enter the corresponding sleep mode according to the parking state, and to control the motor torque to decrease to zero according to the load. The wake-up control module is used to perform low-temperature preheating and high-pressure precharging when a wake-up signal is received, and to control the motor torque to increase according to the load, while controlling the gearbox to pre-adjust the gear to complete the vehicle start-up.
[0012] Thirdly, a vehicle is provided, comprising: a start-stop smooth control system for a heavy-duty vehicle as described in the second aspect above.
[0013] Fourthly, a computer device is provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, it implements the steps of the start-stop smooth control method for heavy-duty vehicles described in the first aspect and any possible implementation of the first aspect.
[0014] The embodiments of this application first acquire the vehicle's load, speed, and brake pedal status. Then, based on the speed and brake pedal status, it is determined whether the vehicle is stopped. If so, based on the load, it is determined whether the heavy-load start-stop smooth control conditions are met. If met, the vehicle's stopping state is determined based on the duration of the brake pedal status, where stopping states include short-stop, medium-stop, and long-stop states. Then, based on the stopping state, the motor is controlled to enter the corresponding sleep mode, and the motor torque is controlled to decrease to zero based on the load. When a wake-up signal is received, low-temperature preheating and high-voltage precharging are performed, and the motor torque is controlled to increase based on the load, while the transmission is pre-adjusted to complete the vehicle start-up. Therefore, the motor sleep mode can be determined based on the vehicle's stopping state, and the torque increase or decrease can be dynamically controlled based on the load, thereby improving the start-stop smoothness of heavy-load vehicles and enhancing driving safety and experience. Attached Figure Description
[0015] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 A flowchart of a start-stop smooth control method for heavy-duty vehicles provided in an embodiment of this application; Figure 2 A structural block diagram of a start-stop smooth control system for heavy-duty vehicles provided in this application embodiment; Figure 3 A structural block diagram of a computer device provided in an embodiment of this application. Detailed Implementation
[0016] The present application will now be described in further detail with reference to the embodiments and accompanying drawings. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the application. Furthermore, it should be noted that, for ease of description, only the parts relevant to the application are shown in the accompanying drawings.
[0017] It should be noted that, unless otherwise specified, the embodiments and features of the embodiments in this application can be combined with each other. The present application will now be described in detail with reference to the accompanying drawings and embodiments.
[0018] The following describes in detail, with reference to the accompanying drawings, a method, system, vehicle, and equipment for smooth start-stop control of heavy-duty vehicles according to embodiments of this application.
[0019] Figure 1 This is a flowchart of a start-stop smooth control method for a heavy-duty vehicle according to an embodiment of this application. Figure 1 As shown, the start-stop smooth control method for heavy-duty vehicles according to an embodiment of this application includes the following steps: S101: Obtain the vehicle's load, speed, and brake pedal status.
[0020] The load is collected in real time by a load sensor, the vehicle speed is collected in real time by a vehicle speed sensor, and the brake pedal status is obtained in real time by a brake pedal opening sensor.
[0021] S102: Determine whether the vehicle has stopped based on the vehicle speed and the brake pedal status.
[0022] In one embodiment of this application, determining whether the vehicle is stopped based on the vehicle speed and the brake pedal state includes: when the vehicle speed is zero and the brake pedal is detected to be depressed, determining that the vehicle is currently stopped.
[0023] S103: If so, determine whether the heavy-load start-stop smooth control conditions are met based on the load.
[0024] In one embodiment of this application, determining whether the heavy-load start-stop smooth control condition is met based on the load includes: if the load is greater than the load threshold, determining that the heavy-load start-stop smooth control condition is met.
[0025] In one specific example, the load threshold is set to 70% of the rated load. That is, when the vehicle's load is ≥ 70% of the rated load, it is determined to be a heavy-load condition, meeting the conditions for heavy-load start-stop smooth control, and automatic heavy-load start-stop smooth control is implemented. Otherwise, the conventional start-stop control mode is used. In other examples, the load threshold can be set according to actual needs.
[0026] S104: If satisfied, the parking state of the vehicle is determined based on the duration of the brake pedal state, wherein the parking state includes a short stop, a medium stop, and a long stop.
[0027] In one embodiment of this application, determining the parking state of the vehicle based on the duration of the brake pedal state includes: determining that the vehicle is in a short stop state when the duration is less than a first time threshold; determining that the vehicle is in a long stop state when the duration is greater than a second time threshold; and determining that the vehicle is in a medium stop state when the duration is between the first time threshold and the second time threshold, wherein the first time threshold is less than the second time threshold.
[0028] Specifically, based on the duration of brake pedal depression, the vehicle's stopping state is divided into the three types mentioned above. In a specific example, if the first time threshold is set to 10 seconds and the second time threshold is set to 30 seconds, then when the brake pedal depression duration is less than 10 seconds, the vehicle is determined to be in a short stop state; when the brake pedal depression duration is greater than 30 seconds, the vehicle is determined to be in a long stop state; and when the brake pedal depression duration is between 10 and 30 seconds, the vehicle is determined to be in a medium stop state. In other examples, the first and second time thresholds can be set according to actual needs.
[0029] S105: Based on the parking status, control the motor to enter the corresponding sleep mode, and based on the load, control the motor torque to decrease to zero.
[0030] In one embodiment of this application, controlling the motor to enter a corresponding sleep mode according to the parking state includes: controlling the motor to enter a shallow sleep mode when the vehicle is in a short stop state; controlling the motor to enter a semi-deep sleep mode when the vehicle is in a medium stop state; and controlling the motor to enter a deep sleep mode when the vehicle is in a long stop state.
[0031] Specifically, when entering shallow sleep mode, the high-voltage pre-charge state and basic torque are maintained in standby mode, and the core high-voltage power supply is not cut off, with a wake-up response time ≤0.2s; when entering semi-deep sleep mode, unnecessary low-voltage power supply is reduced, and the high-voltage system remains in standby mode; when entering deep sleep mode, unnecessary high-voltage and low-voltage power supply is cut off, and only the parking and monitoring systems are powered, with a wake-up response time ≤0.5s. It should be noted that the above 0.2s and 0.5s are only examples, and in other examples, the wake-up response time can be set according to actual needs.
[0032] Next, the Vehicle Control Unit (VCU) sends a torque reduction command to the Motor Control Unit (MCU) and dynamically adjusts the torque reduction gradient according to the vehicle's load. The greater the load, the smaller the reduction gradient, thereby controlling the motor torque to drop linearly and smoothly to 0. At the same time, the VCU, in conjunction with the Transmission Control Unit (TCU), adjusts the transmission ratio to synchronously match the electric drive axle speed and eliminate the speed difference in the transmission system. After the motor torque drops to 0, the electronic parking brake system is triggered to assist in locking the wheels to ensure that the vehicle is completely stationary and prevents it from rolling under heavy load.
[0033] S106: When a wake-up signal is received, perform low-temperature preheating and high-pressure precharging, and control the motor torque to increase according to the load, while controlling the gearbox to pre-adjust the gear to complete the vehicle start-up.
[0034] Upon receiving a wake-up signal from the release of the brake pedal or the pressing of the accelerator pedal, the Battery Management System (BMS) first performs low-temperature preheating and high-voltage precharging. Specifically, when the battery temperature is <0℃ or the motor temperature is <5℃, the heating module is activated first to preheat the battery until the temperature reaches the preset threshold, such as 5℃~35℃ for the battery and 10℃~40℃ for the motor, before high-voltage precharging is completed. Then, the MCU selects the torque increment gradient according to the vehicle's load and gradually increases the output torque. At the same time, the TCU pre-adjusts the gearbox and synchronizes the engine speed, ensuring precise matching between torque output and load and driving resistance, thereby achieving a smooth start without any sudden shocks.
[0035] It should be noted that the temperature thresholds for the battery and motor mentioned above are merely illustrative; in specific examples, they can be set according to actual needs.
[0036] In one embodiment of this application, the method further includes: real-time monitoring of battery current, motor torque fluctuations, and transmission system vibration data; if any of the battery current, motor torque fluctuations, and transmission system vibration data becomes abnormal, torque correction is performed.
[0037] In one embodiment of this application, the method further includes: if the number of abnormal occurrences exceeds a preset number, switching to manual start / stop mode and issuing a fault warning.
[0038] Specifically, if any abnormality is detected in the battery current, motor torque fluctuation, or transmission system vibration data, the torque correction algorithm will be immediately activated to dynamically reduce the torque gradient and extend the transition time. If the number of abnormalities exceeds the preset number, such as 3 times, the system will automatically switch to manual start-stop mode and issue fault warnings through instrument reminders and other means to ensure driving safety.
[0039] According to the start-stop smooth control method for heavy-duty vehicles in this application embodiment, the vehicle's load, speed, and brake pedal status are first acquired. Then, based on the vehicle speed and brake pedal status, it is determined whether the vehicle is stopped. If so, the load is used to determine whether the heavy-duty start-stop smooth control conditions are met. If met, the vehicle's stopping state is determined based on the duration of the brake pedal status, where stopping states include short-stop, medium-stop, and long-stop states. Then, based on the stopping state, the motor is controlled to enter the corresponding sleep mode, and the motor torque is controlled to decrease to zero based on the load. When a wake-up signal is received, low-temperature preheating and high-voltage pre-charging are performed, and the motor torque is controlled to increase based on the load. Simultaneously, the gearbox is controlled to pre-adjust the gear to complete vehicle startup. Therefore, the motor sleep mode can be determined based on the vehicle's stopping state, and the torque increase or decrease can be dynamically controlled based on the load, thereby improving the start-stop smoothness of heavy-duty vehicles and enhancing driving safety and experience.
[0040] Figure 2 This is a structural block diagram of a start-stop smooth control system for a heavy-duty vehicle according to an embodiment of this application. Figure 2 As shown, a start-stop smooth control system for a heavy-duty vehicle according to an embodiment of this application includes: an acquisition module 210, a first judgment module 220, a second judgment module 230, a determination module 240, a sleep control module 250, and a wake-up control module 260, wherein: The acquisition module 210 is used to acquire the vehicle's load, speed, and brake pedal status. The first judgment module 220 is used to determine whether the vehicle has stopped based on the vehicle speed and the brake pedal status. The second judgment module 230 is used to determine whether the heavy load start-stop smooth control conditions are met based on the load when the vehicle is parked. The determining module 240 is used to determine the parking state of the vehicle based on the duration of the brake pedal state when the heavy-load start-stop smooth control conditions are met. The parking state includes a short stop state, a medium stop state, and a long stop state. The sleep control module 250 is used to control the motor to enter the corresponding sleep mode according to the parking state, and to control the motor torque to decrease to zero according to the load. The wake-up control module 260 is used to perform low-temperature preheating and high-pressure precharging when a wake-up signal is received, and to control the motor torque to increase according to the load, while controlling the gearbox to pre-adjust the gear to complete the vehicle start-up.
[0041] According to the start-stop smooth control system for heavy-duty vehicles in this application embodiment, the vehicle's load, speed, and brake pedal status are first acquired. Then, based on the vehicle speed and brake pedal status, it is determined whether the vehicle is stopped. If so, the load is used to determine whether the heavy-duty start-stop smooth control conditions are met. If met, the vehicle's stopping state is determined based on the duration of the brake pedal status, where stopping states include short-stop, medium-stop, and long-stop states. Then, based on the stopping state, the motor is controlled to enter the corresponding sleep mode, and the motor torque is controlled to decrease to zero based on the load. When a wake-up signal is received, low-temperature preheating and high-voltage precharging are performed, and the motor torque is controlled to increase based on the load. Simultaneously, the gearbox is controlled to pre-adjust the gear to complete vehicle startup. Therefore, the motor sleep mode can be determined based on the vehicle's stopping state, and the torque increase or decrease can be dynamically controlled based on the load, thereby improving the start-stop smoothness of heavy-duty vehicles and enhancing driving safety and experience.
[0042] Specific limitations regarding the start-stop smoothness control system for heavy-duty vehicles can be found in the above description of the start-stop smoothness control method for heavy-duty vehicles, and will not be repeated here. Each module of the aforementioned start-stop smoothness control system for heavy-duty vehicles can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in or independent of the processor in a computer device in hardware form, or stored in the memory of a computer device in software form, so that the processor can call and execute the corresponding operations of each module.
[0043] Furthermore, a vehicle is provided, comprising: a start-stop smooth control system for a heavy-duty vehicle according to any of the above embodiments. The vehicle first acquires its load, speed, and brake pedal status; then, based on the speed and brake pedal status, it determines whether the vehicle is stopped; if so, it determines whether the heavy-duty start-stop smooth control conditions are met based on the load; if met, it determines the vehicle's stopping state based on the duration of the brake pedal status, wherein the stopping state includes short-stop, medium-stop, and long-stop states; then, based on the stopping state, it controls the motor to enter the corresponding sleep mode, and controls the motor torque to decrease to zero based on the load; when a wake-up signal is received, it performs low-temperature preheating and high-voltage precharging, and controls the motor torque to increase based on the load, while simultaneously controlling the transmission to pre-adjust the gear to complete vehicle startup. Thus, the motor sleep mode can be determined based on the vehicle's stopping state, and the torque increase or decrease can be dynamically controlled in conjunction with the load, thereby improving the start-stop smoothness of the heavy-duty vehicle and enhancing driving safety and experience.
[0044] Furthermore, other components and functions of the vehicle according to the embodiments of this application are known to those skilled in the art and will not be described in detail here.
[0045] In one embodiment, a computer device is provided. Figure 3 This is a structural block diagram of the computer device provided in the embodiments of this application, with reference to... Figure 3 The computer device includes a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the aforementioned embodiment of the start-stop smooth control method for heavy-duty vehicles. For example, it executes: acquiring the vehicle's load, speed, and brake pedal status; Based on the vehicle speed and brake pedal status, determine whether the vehicle has stopped; If so, determine whether the heavy-load start-stop smooth control conditions are met based on the load. If the conditions are met, the parking state of the vehicle is determined based on the duration of the brake pedal state, wherein the parking state includes short stop, medium stop and long stop. Based on the parking status, the motor is controlled to enter the corresponding sleep mode, and based on the load, the motor torque is controlled to decrease to zero. When a wake-up signal is received, low-temperature preheating and high-pressure precharging are performed, and the motor torque is increased according to the load. At the same time, the gearbox is pre-adjusted to complete the vehicle start-up.
[0046] This application also provides a computer-readable storage medium storing a computer program. When the processor executes the computer program, it implements the aforementioned embodiment of the start-stop smooth control method for heavy-duty vehicles. For example, it executes: acquiring the vehicle's load, speed, and brake pedal status; Based on the vehicle speed and brake pedal status, determine whether the vehicle has stopped; If so, determine whether the heavy-load start-stop smooth control conditions are met based on the load. If the conditions are met, the parking state of the vehicle is determined based on the duration of the brake pedal state, wherein the parking state includes short stop, medium stop and long stop. Based on the parking status, the motor is controlled to enter the corresponding sleep mode, and based on the load, the motor torque is controlled to decrease to zero. When a wake-up signal is received, low-temperature preheating and high-pressure precharging are performed, and the motor torque is increased according to the load. At the same time, the gearbox is pre-adjusted to complete the vehicle start-up.
[0047] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the methods described above. Any references to memory, storage, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, or optical storage, etc. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc.
[0048] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0049] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.
Claims
1. A method for smooth start-stop control of heavy-duty vehicles, characterized in that, include: Obtain the vehicle's load, speed, and brake pedal status; Based on the vehicle speed and brake pedal status, determine whether the vehicle has stopped; If so, determine whether the heavy-load start-stop smooth control conditions are met based on the load. If the conditions are met, the parking state of the vehicle is determined based on the duration of the brake pedal state, wherein the parking state includes short stop, medium stop and long stop. Based on the parking status, the motor is controlled to enter the corresponding sleep mode, and based on the load, the motor torque is controlled to decrease to zero. When a wake-up signal is received, low-temperature preheating and high-pressure precharging are performed, and the motor torque is increased according to the load. At the same time, the gearbox is pre-adjusted to complete the vehicle start-up.
2. The start-stop smooth control method for heavy-duty vehicles according to claim 1, characterized in that, The step of determining whether the vehicle has stopped based on the vehicle speed and brake pedal status includes: When the vehicle speed is zero and the brake pedal is detected to be depressed, the vehicle is determined to be stopped.
3. The start-stop smooth control method for heavy-duty vehicles according to claim 1, characterized in that, The step of determining whether the heavy-load start-stop smooth control conditions are met based on the load includes: If the load is greater than the load threshold, the heavy load start-stop smooth control condition is determined to be met.
4. The start-stop smooth control method for heavy-duty vehicles according to claim 1, characterized in that, Determining the vehicle's parking state based on the duration of the brake pedal state includes: When the duration is less than the first time threshold, the vehicle is determined to be in a short stop state; When the duration exceeds the second time threshold, the vehicle is determined to be in a long-term stopped state. When the duration is between the first time threshold and the second time threshold, the vehicle is determined to be in a stopped state, wherein the first time threshold is less than the second time threshold.
5. The start-stop smooth control method for heavy-duty vehicles according to claim 1, characterized in that, The step of controlling the motor to enter the corresponding sleep mode according to the parking state includes: When the vehicle is in a short stop state, the control motor enters a shallow sleep mode; When the vehicle is in a stopped state, the control motor enters a semi-deep sleep mode; When the vehicle is in a long-term parked state, the control motor enters a deep sleep mode.
6. The start-stop smooth control method for heavy-duty vehicles according to any one of claims 1-5, characterized in that, Also includes: Real-time monitoring of battery current, motor torque fluctuations, and transmission system vibration data; If any of the battery current, motor torque fluctuations, or transmission system vibration data becomes abnormal, torque correction will be performed.
7. The start-stop smooth control method for heavy-duty vehicles according to claim 6, characterized in that, Also includes: If the number of abnormal occurrences exceeds the preset limit, the system will switch to manual start / stop mode and issue a fault warning.
8. A start-stop smooth control system for heavy-duty vehicles, characterized in that, include: The acquisition module is used to acquire the vehicle's load, speed, and brake pedal status. The first judgment module is used to determine whether the vehicle has stopped based on the vehicle speed and the brake pedal status. The second judgment module is used to determine whether the heavy load start-stop smooth control conditions are met when the vehicle is parked, based on the load. The determination module is used to determine the parking state of the vehicle based on the duration of the brake pedal state when the heavy-load start-stop smooth control conditions are met. The parking state includes short stop, medium stop and long stop. The sleep control module is used to control the motor to enter the corresponding sleep mode according to the parking state, and to control the motor torque to decrease to zero according to the load. The wake-up control module is used to perform low-temperature preheating and high-pressure precharging when a wake-up signal is received, and to control the motor torque to increase according to the load, while controlling the gearbox to pre-adjust the gear to complete the vehicle start-up.
9. A vehicle, characterized in that, include: The start-stop smooth control system for heavy-duty vehicles according to claim 8.
10. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the start-stop smooth control method for heavy-duty vehicles according to any one of claims 1-7.