A torque control method, device and system for new energy buses

Abstract

The present invention discloses a torque control method for a new energy bus, comprising the following steps: obtaining the slope information of the ramp on which the vehicle is located and the current vehicle accelerator pedal opening information; determining the normal torque of the vehicle when traveling on a horizontal road according to the current vehicle accelerator pedal opening information of the ramp on which the vehicle is located; superimposing the normal torque and the calibrated torque to obtain the current vehicle target torque of the ramp on which the vehicle is located, and using the current vehicle target torque to control the motor output torque. The present application can adjust the output torque value according to the slope of the current road on which the vehicle is located and the current accelerator pedal opening, so that the torque output of the whole vehicle changes according to the slope of the current road on which the vehicle is currently located, so that the vehicle has a relatively similar driving and riding experience at different slopes, avoiding changes in the driving and riding experience due to changes in the road slope, and improving comfort.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle torque control, and in particular to a torque control method, device and system for a new energy bus. Background Art

[0002] With the rapid development of new energy vehicle technology, new energy buses are increasingly used in urban public transportation, long-distance passenger transportation and other fields. New energy buses rely on motor drive, and their torque output directly determines the vehicle's power performance. When a vehicle is driving under different road conditions, especially when driving on a slope, the demand for torque is quite different from that on a horizontal road. The existing torque control system usually adjusts the vehicle's torque output through the driver's operation of the accelerator pedal. This method cannot automatically adapt to the changes in torque demand caused by different slopes, especially when starting the vehicle uphill or downhill, which can easily lead to insufficient power or excess power, affecting the vehicle's driving stability and ride comfort. At the same time, when the vehicle is on an uphill road, the driver can only judge whether the current vehicle can continue to move forward based on experience. Summary of the invention

[0003] The purpose of the present invention is to provide a torque control method, device and system for a new energy bus, which are used to solve the problem in the prior art that the vehicle torque control when driving on a slope is insufficient to cope with different slopes and driving conditions.

[0004] The purpose of the present invention can be achieved by the following technical solutions:

[0005] A torque control method for a new energy bus comprises the following steps:

[0006] S10, obtaining the slope information of the ramp on which the vehicle is located and the current accelerator pedal opening information of the vehicle;

[0007] S20, determining the normal torque of the vehicle when traveling on a horizontal road according to the current accelerator pedal opening information of the vehicle on the slope where the vehicle is located;

[0008] S30, superimposing the normal torque and the calibrated torque to obtain a current vehicle target torque for the slope on which the vehicle is located, and using the current vehicle target torque to control the motor output torque.

[0009] As a further solution of the present invention: the method for determining the normal torque of the vehicle when traveling on a horizontal road in step S20 is: according to the current vehicle accelerator pedal opening information of the slope on which the vehicle is located, the accelerator pedal opening information of the vehicle on the horizontal road that is consistent with the current vehicle accelerator pedal opening information is obtained, and the vehicle controller of the vehicle determines the required normal torque according to the accelerator pedal opening information and the engine speed; wherein the normal torque is Torque_H.

[0010] As a further solution of the present invention: when the vehicle is driving on a slope, the calculation formula for superimposing the conventional torque and the calibrated torque in step S30 is: Torque_out1= Torque_H+k* Torque_H, wherein the calibrated torque is k* Torque_H, k is the slope torque coefficient, k is an integer value, and Torque_out1 is the current vehicle calculated torque;

[0011] According to the current vehicle calculated torque Torque_out1 and the maximum torque Torque_Max allowed by the current vehicle, the current vehicle target torque of the vehicle on the slope is output as: Torque_out2=Min{Torque_Max, Torque_out1}.

[0012] As a further solution of the present invention: when the conventional torque and the calibrated torque are superimposed, a method for pre-determining whether the maximum slope allowed by the vehicle is exceeded is: obtaining the real-time slope value of the slope on which the vehicle is located, and the vehicle controller of the vehicle determines whether the real-time slope value exceeds a set threshold value. If it exceeds the set threshold value, it is determined that the maximum slope allowed by the vehicle is exceeded; otherwise, the slope of the slope on which the vehicle is located does not exceed the maximum slope allowed by the vehicle.

[0013] As a further solution of the present invention: a maximum torque coefficient Kmax of the maximum allowable slope of the vehicle is preset. When the slope of the slope on which the vehicle is located exceeds the maximum allowable slope value, the torque coefficient k=Kmax, wherein Kmax is an integer value.

[0014] As a further solution of the present invention: when it is determined that the maximum slope allowed by the vehicle is exceeded, the vehicle controller of the vehicle sends a prompt message to the display module and issues a warning prompt.

[0015] A system using the torque control method for a new energy bus as described above includes:

[0016] A slope detection device, used to obtain the slope information of the slope on which the vehicle is located;

[0017] The throttle opening sensor is used to obtain the current vehicle throttle pedal opening information of the slope on which the vehicle is located;

[0018] A vehicle controller, the vehicle controller is connected to the slope detection device and the throttle opening sensor respectively, and is used to determine the normal torque of the vehicle when traveling on a horizontal road according to the current vehicle throttle pedal opening information, and to superimpose the normal torque and the calibrated torque to obtain the current vehicle target torque on the slope where the vehicle is located;

[0019] A motor controller connected to the vehicle controller and controlling the motor controller to output a current vehicle target torque of the motor through the vehicle controller;

[0020] When the slope information of the slope on which the vehicle is located obtained by the slope detection device exceeds a predetermined threshold value, the vehicle controller controls the alarm device to issue a prompt message that the slope exceeds the maximum slope allowed by the vehicle.

[0021] As a further solution of the present invention: the slope detection device includes a slope state detection module for obtaining the slope information of the slope on which the vehicle is located, and feeding it back to the slope data processing module. The slope data processing module sends the slope information of the slope on which the vehicle is located to the vehicle controller through the slope communication module.

[0022] As a further solution of the present invention: the alarm device includes a warning communication module and a display module, and the vehicle controller sends a prompt message of exceeding the maximum slope allowed by the vehicle to the display module through the warning communication module.

[0023] A device using the torque control method of a new energy bus as described above comprises:

[0024] An acquisition unit, used to acquire the slope information of the slope on which the vehicle is located and the current vehicle accelerator pedal opening information;

[0025] A determination unit, configured to determine a normal torque of the vehicle traveling on a horizontal road according to current vehicle accelerator pedal opening information of the slope on which the vehicle is located, and to superimpose the normal torque and the calibrated torque to obtain a current vehicle target torque of the slope on which the vehicle is located;

[0026] A control unit, used to control the motor output torque using the current vehicle target torque;

[0027] The alarm unit is used to issue an alarm prompt when the control unit determines that the maximum slope allowed by the vehicle is exceeded.

[0028] The present invention has at least the following beneficial effects:

[0029] (1) The output torque value can be adjusted according to the slope of the road the vehicle is currently on and the current accelerator pedal opening, so that the torque output of the whole vehicle changes according to the slope of the road the vehicle is currently on, so that a smaller torque can be output on a flat road or a low-slope road to meet the driving demand, and a larger torque can be output on an uphill road to meet the driving demand, so that the vehicle has a relatively similar driving and riding experience on different slopes, avoiding changes in driving and riding experience due to changes in road slope, and improving comfort;

[0030] (2) This application can make reasonable judgments on the slope information of the road on which the vehicle is located. When the slope information exceeds the maximum slope allowed by the vehicle, the maximum value within a reasonable range is used for calculation to ensure that the vehicle can travel normally;

[0031] (3) When the vehicle is on an uphill road and the slope exceeds the maximum allowable slope of the vehicle, the driver will be reminded so that the driver can have a certain understanding of the vehicle status under the current slope conditions and be notified in advance of possible situations such as slipping, thereby improving driving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The present invention will be further described below in conjunction with the accompanying drawings.

[0033] Figure 1 It is a flow chart of a torque control method of a new energy bus of the present invention;

[0034] Figure 2 is a flow chart of another torque control method for a new energy bus of the present invention;

[0035] Figure 3 It is a framework diagram of a torque control system of a new energy bus of the present invention;

[0036] Figure 4 It is a schematic diagram of a torque control device for a new energy bus of the present invention;

[0037] Figure 5 It is a schematic diagram of another torque control device for a new energy bus of the present invention.

[0038] In the figure: 100, vehicle controller; 200, slope detection device; 201, slope state detection module; 202, slope data processing module; 203, slope communication module; 300, throttle opening sensor; 400, motor controller; 401, motor; 500, alarm device; 501, warning communication module; 502, display module; 600, control unit; 601, acquisition unit; 602, determination unit; 603, alarm unit; 700, processor; 701, memory; 702, interface circuit. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] In the description of the present invention, it should be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention; in the description of the present invention, the meaning of "multiple" and "several" is at least two, for example two, three, etc., unless otherwise clearly and specifically defined.

[0041] See also Figure 1 As shown, the present invention is a torque control method for a new energy bus, comprising the following steps:

[0042] S10. Obtaining the slope information of the slope on which the vehicle is located and the current accelerator pedal opening information of the vehicle.

[0043] In the above step S10, the slope information of the slope on which the vehicle is located can be obtained through the slope state detection module 201. For example, the slope state detection module 201 can be a slope sensor, and the obtained slope information can accurately upload the specific slope value of the current uphill or downhill situation of the vehicle to the vehicle controller 100; the current vehicle throttle pedal opening information of the slope on which the vehicle is located can be obtained through the throttle opening sensor 300. When the vehicle is driving on a horizontal road, uphill or downhill, the driver controls the acceleration and deceleration of the vehicle by stepping on the throttle pedal. The change in the throttle pedal opening will directly affect the power output of the engine, and then adjust the torque output of the vehicle. However, when the vehicle is driving on a slope, controlling the vehicle torque output only by stepping on the throttle pedal cannot automatically adapt to the changes in torque demand brought about by different slopes, especially when the vehicle starts on uphill or downhill slopes, it is easy to cause insufficient power or excessive power, affecting the driving stability and ride comfort of the vehicle.

[0044] S20. Determine the normal torque of the vehicle when traveling on a horizontal road according to the current accelerator pedal opening information of the vehicle on the slope where the vehicle is located.

[0045] In the above step S20, the method for determining the normal torque of the vehicle when traveling on a horizontal road is as follows: according to the current vehicle accelerator pedal opening information of the slope on which the vehicle is located, the accelerator pedal opening information of the horizontal road on which the vehicle is located that is consistent with the current vehicle accelerator pedal opening information is obtained, and the vehicle controller 100 of the vehicle determines the required normal torque according to the accelerator pedal opening information and the engine speed; wherein the normal torque is Torque_H; in this step, when the vehicle is traveling on a horizontal road, uphill or downhill, the vehicle is in the same accelerator pedal opening size, which can reflect the normal torque of the vehicle during driving.

[0046] S30 , superimposing the normal torque and the calibrated torque to obtain the current vehicle target torque of the slope on which the vehicle is located, and using the current vehicle target torque to control the output torque of the motor 401 .

[0047] In the above step S30, when the vehicle is traveling on an uphill or downhill slope, the vehicle cannot meet the torque demand changes caused by different slopes by only using conventional torque output. By superimposing conventional torque and calibrated torque, torque compensation is performed on the basis of conventional torque, thereby compensating for the torque difference caused by the vehicle's driving slope. The calibrated torque can be calibrated according to the current throttle opening size and the slope size, that is, the acquisition of the calibrated torque is directly affected by the current throttle opening size and the slope size, so that different calibrated torques can be obtained at different slopes and different throttle openings.

[0048] When the vehicle is traveling on a slope, the calculation formula for superimposing the conventional torque and the calibrated torque in the above step S30 is: Torque_out1= Torque_H+k* Torque_H, wherein the calibrated torque is k* Torque_H, k is the slope torque coefficient, k is an integer value, and Torque_out1 is the current vehicle calculated torque; based on the current vehicle calculated torque Torque_out1 and the maximum torque Torque_Max allowed by the current vehicle, the current vehicle target torque of the slope on which the vehicle is located is output as: Torque_out2=Min{Torque_Max, Torque_out1}.

[0049] In the above calculation process for obtaining the current vehicle target torque, the torque calculation value Torque_out1 which is the superposition of the conventional torque and the calibrated torque can be calculated in advance by the vehicle controller 100. However, during the driving of the vehicle, there is a limit design protection of the maximum torque Torque_Max allowed by the current vehicle. The maximum torque Torque_Max allowed by the current vehicle can be obtained by the vehicle controller 100 by comprehensively analyzing the current status of various components of the vehicle. It is necessary to compare the superimposed torque calculation value Torque_out1 with the maximum torque Torque_Max allowed by the current vehicle in order to obtain the smaller value of Min{Torque_Max, Torque_out1} and output it as the current vehicle target torque Torque_out2, so as to ensure that the output torque of the motor 401 does not exceed its design limit or safety range during the actual operation of the vehicle.

[0050] In the above process of obtaining the superimposed torque calculation value Torque_out1, K in the calibrated torque k* Torque_H is the value of the slope torque coefficient, which represents the calibration value under the current road slope of the vehicle and the current throttle pedal opening. The slope and the throttle opening have a preset relationship or a corresponding relationship, and different slopes can correspond to different throttle openings. In one implementation, the correspondence between the calibrated torque demand k value under different road slopes and different throttle pedal openings of the vehicle is shown in Table 1.

[0051]

[0052] It should be understood that the size of the k value is not clearly written in the table. The actual value of the slope torque coefficient k needs to be calibrated according to different vehicle states. Usually, if the slope information is uphill, and the greater the slope, the slope torque coefficient k is set to a positive integer and the value is larger, thereby solving the problem of insufficient power for the vehicle to travel uphill; if the slope information is downhill, and the greater the slope, the slope torque coefficient k is set to a negative integer and the value is smaller, thereby solving the problem of excess power for the vehicle to travel downhill; after the calibration of the correspondence between the k values ​​for different slopes and different throttle pedal opening requirements is completed, the correspondence can be stored in the vehicle controller 100 in a tabular form, and the table output can be performed when used.

[0053] This control method can be used to adjust the output torque value according to the slope of the road the vehicle is currently on and the current accelerator pedal opening, so that the torque output of the entire vehicle changes according to the slope of the road the vehicle is currently on. As a result, a smaller torque can be output on a flat road or a low-slope road to meet driving needs, and a larger torque can be output on an uphill road to meet driving needs, so that the vehicle has a more similar driving and riding experience on different slopes, avoiding changes in driving and riding experience due to changes in road slope, and improving comfort.

[0054] In the process of using this control method, combined with Figure 2 As shown, when the conventional torque and the calibrated torque are superimposed, the method for pre-determining whether the maximum slope allowed by the vehicle is exceeded is: obtaining the real-time slope value of the slope on which the vehicle is located, and the vehicle controller 100 of the vehicle determines whether the real-time slope value exceeds the set threshold value. If it exceeds the set threshold value, it is determined that the maximum slope allowed by the vehicle is exceeded. Conversely, the slope of the slope on which the vehicle is located does not exceed the maximum slope allowed by the vehicle. The present application can make a reasonable judgment on the slope information of the road on which the vehicle is located. When the slope information exceeds the set maximum slope allowed by the vehicle, the maximum value within a reasonable range is used for calculation, which can ensure that the vehicle can drive normally.

[0055] In the above determination process, when it is determined that the maximum slope allowed by the vehicle is exceeded, the method for obtaining the current vehicle target torque of the slope on which the vehicle is located in step S30 is: presetting the maximum torque coefficient Kmax of the maximum allowable slope of the vehicle, when the slope of the slope on which the vehicle is located exceeds the maximum allowable slope value, the torque coefficient k=Kmax, wherein the Kmax is an integer value; the slope torque coefficient k in the calibrated torque k* Torque_H is taken as the set maximum torque coefficient Kmax, the conventional torque and the calibrated torque are superimposed, and the current vehicle target torque of the slope on which the vehicle is located is obtained by the following calculation formula: Torque_out1=Torque_H+k* Torque_H, Torque_out2=Min{Torque_Max, Torque_out1}; it can be understood that when the slope of the slope on which the vehicle is located exceeds the maximum allowable slope value, the slope torque coefficient k value no longer changes, and the current vehicle target torque is obtained by calculating the maximum torque coefficient Kmax.

[0056] When it is determined that the maximum slope allowed by the vehicle is exceeded, the vehicle controller 100 of the vehicle will send a prompt message to the display module 502 and issue an alarm prompt; for example, when the slope of the vehicle on an uphill road exceeds the maximum slope allowed by the vehicle, the driver will be reminded so that the driver has a certain understanding of the vehicle status under the current slope conditions, and will be given early warning of possible situations such as slipping, thereby improving driving safety.

[0057] like Figure 3 As shown, the present invention also provides a system adopting a torque control method for a new energy bus as described above, including a slope detection device 200, a throttle opening sensor 300, a vehicle controller 100 and a motor controller 400, wherein the slope detection device 200 is used to obtain the slope information of the slope on which the vehicle is located; the throttle opening sensor 300 is used to obtain the current vehicle throttle pedal opening information of the slope on which the vehicle is located; the vehicle controller 100 is connected to the slope detection device 200 and the throttle opening sensor 300 respectively, and is used to determine the normal torque of the vehicle traveling on a horizontal road according to the current vehicle throttle pedal opening information, and superimpose the normal torque and the calibrated torque to obtain the current vehicle target torque of the slope on which the vehicle is located; the motor controller 400 is connected to the vehicle controller 100, and controls the motor controller 400 to output the current vehicle target torque of the motor 401 through the vehicle controller 100.

[0058] The vehicle controller 100 in the control system can be called a vehicle control unit 600, which is used to realize the core control function of the vehicle and is the core control component of the vehicle. By collecting signals from other components (such as the accelerator pedal, brake pedal, sensor, etc.), and controlling the actions of the lower-level component controllers according to the collected signals, the vehicle is driven to travel normally. The functions of the vehicle controller 100 include, for example, driving torque control, optimal control of braking energy, energy management of the vehicle, maintenance and management of the controller area network, fault diagnosis and processing, vehicle status monitoring, etc. For example, the vehicle controller 100 can collect the state of the throttle opening by stepping on the accelerator pedal. For another example, the slope state detection module 201 included in the slope detection device 200 is used to obtain the slope information of the slope where the vehicle is located, and feedback to the slope data processing module 202. The slope data processing module 202 sends the slope information of the slope where the vehicle is located to the vehicle controller 100 through the slope communication module 203. The vehicle controller 100 can collect the slope information of the road condition where the vehicle is located through the slope state detection module 201.

[0059] The motor controller 400 may also be referred to as the motor 401 control unit 600, and is used to control the output torque of the motor 401. Figure 3 As shown, the motor controller 400 is connected to the motor 401 to control the output torque of the motor 401 .

[0060] Among them, when the slope detection device 200 obtains that the slope information of the slope on which the vehicle is located exceeds the predetermined threshold information, the vehicle controller 100 controls the alarm device 500 to issue a prompt information that the slope exceeds the maximum slope allowed by the vehicle. The alarm device 500 includes a warning communication module 501 and a display module 502. The vehicle controller 100 sends the prompt information that the slope exceeds the maximum slope allowed by the vehicle to the display module 502 through the warning communication module 501; when the slope of the uphill road on which the vehicle is located exceeds the maximum slope allowed by the vehicle, the driver is reminded so that the driver has a certain understanding of the vehicle status under the current slope conditions, and is given early warning notification for possible conditions such as slipping, thereby improving driving safety.

[0061] This control system can adjust the output torque value according to the slope of the current road the vehicle is on and the current accelerator pedal opening, so that the torque output of the whole vehicle changes according to the slope of the current road the vehicle is on. As a result, a smaller torque can be output on flat roads or low-slope roads to meet driving needs, and a larger torque can be output on uphill roads to meet driving needs, so that the vehicle has a more similar driving and riding experience on different slopes, avoiding changes in driving and riding experience due to changes in road slope, and improving comfort.

[0062] like Figure 4As shown, the present invention also provides a device for adopting a torque control method for a new energy bus as described above, including an acquisition unit 601, a determination unit 602, a control unit 600 and an alarm unit 603; the acquisition unit 601 is used to acquire the slope information of the slope on which the vehicle is located and the current vehicle accelerator pedal opening information; the determination unit 602 is used to determine the normal torque of the vehicle when traveling on a horizontal road according to the current vehicle accelerator pedal opening information on the slope on which the vehicle is located, and superimpose the normal torque and the calibrated torque to obtain the current vehicle target torque on the slope on which the vehicle is located; the control unit 600 is used to control the output torque of the motor 401 using the current vehicle target torque; the alarm unit 603 is used to issue an alarm prompt when the control unit 600 determines that the maximum slope prompt information allowed by the vehicle is exceeded.

[0063] The methods of the operations performed by the above-mentioned units may be specifically referred to the above-mentioned method embodiments, which will not be described in detail here.

[0064] The division of the various units of the above control device is only a division of logical functions. In actual implementation, they can be fully or partially integrated into one physical entity, or physically separated. And these units can be all implemented in the form of software called by the processor 700; or all implemented in the form of hardware; or some units can be implemented in the form of software called by the processor 700, and some units can be implemented in the form of hardware. In another implementation, please refer to Figure 5 , which is a schematic diagram of another torque control device for a new energy bus of the present invention, the torque control device includes a processor 700 and an interface circuit 702, the processor 700 is used to obtain the slope information of the slope where the vehicle is located and the current vehicle accelerator pedal opening information through the interface circuit 702, and execute the above torque control method for a new energy bus, and the processor 700 may be one or more. The device may also include a memory 701, and the processor 700 may implement the above torque control method by calling the program stored in the memory 701.

[0065] Based on the same inventive concept, an embodiment of the present application further provides a computer-readable storage medium, which includes a program. When the program is called by the processor 700, the processor 700 implements the above torque control method.

[0066] It should be understood that all or part of the steps of implementing the above method embodiment can be completed by hardware related to program instructions, and the above program can be stored in a computer-readable storage medium. When the program code is called by the processor 700, the processor 700 is used to execute the method executed by the UE in the above method embodiment. The embodiment of the present invention does not limit the form and quantity of the memory 701 and the processor 700. For example, the memory 701 can be a CPU or other processor 700 that can call a program, and the memory 701 can be a read-only memory (ROM), a random access memory (RAM), a disk or an optical disk, and other media that can store program codes.

[0067] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A torque control method for a new energy bus, characterized in that: The following steps are involved: S10, obtaining the slope information of the ramp on which the vehicle is located and the current accelerator pedal opening information of the vehicle; S20, determining the normal torque of the vehicle when traveling on a horizontal road according to the current vehicle accelerator pedal opening information of the ramp on which the vehicle is located, wherein the method for determining the normal torque of the vehicle when traveling on a horizontal road is as follows: obtaining the accelerator pedal opening information of the horizontal road on which the vehicle is located that is consistent with the current vehicle accelerator pedal opening information according to the current vehicle accelerator pedal opening information, wherein the vehicle controller (100) of the vehicle determines the required normal torque according to the accelerator pedal opening information and the engine speed; wherein the normal torque is Torque_H; S30, superimposing the normal torque and the calibrated torque to obtain the current vehicle target torque of the slope on which the vehicle is located, and using the current vehicle target torque to control the output torque of the motor (401); when the vehicle is traveling on a slope, the calculation formula for superimposing the normal torque and the calibrated torque in this step is: Torque_out1= Torque_H+k* Torque_H, wherein the calibrated torque is k*Torque_H, k is the slope torque coefficient, and k is an integer value, and Torque_out1 is the current vehicle calculated torque; According to the current vehicle calculated torque Torque_out1 and the maximum torque Torque_Max allowed by the current vehicle, the current vehicle target torque of the vehicle on the slope is output as: Torque_out2=Min{Torque_Max, Torque_out1}.

2. The torque control method for a new energy bus according to claim 1, characterized in that: When the conventional torque and the calibrated torque are superimposed, a method for pre-judging whether the maximum slope allowed by the vehicle is exceeded is as follows: obtaining the real-time slope value of the slope on which the vehicle is located, and the vehicle controller (100) of the vehicle determines whether the real-time slope value exceeds a set threshold value. If the real-time slope value exceeds the set threshold value, it is determined that the maximum slope allowed by the vehicle is exceeded. Otherwise, the slope of the slope on which the vehicle is located does not exceed the maximum slope allowed by the vehicle.

3. The torque control method for a new energy bus according to claim 2 is characterized in that: A maximum torque coefficient Kmax of the maximum allowable slope of the vehicle is preset. When the slope of the slope on which the vehicle is located exceeds the maximum allowable slope value, the torque coefficient k=Kmax, wherein Kmax is an integer value.

4. The torque control method for a new energy bus according to claim 3 is characterized in that: When it is determined that the maximum slope allowed by the vehicle is exceeded, the vehicle controller (100) of the vehicle sends a prompt message to the display module (502) and issues a warning prompt.

5. A system using a torque control method for a new energy bus as claimed in claim 1, characterized in that: include: A slope detection device (200) is used to obtain slope information of a slope on which a vehicle is located; A throttle opening sensor (300), used to obtain current vehicle throttle pedal opening information on the slope on which the vehicle is located; A vehicle controller (100), the vehicle controller (100) being connected to the slope detection device (200) and the throttle opening sensor (300) respectively, and being used to determine the normal torque of the vehicle when traveling on a horizontal road according to the current vehicle throttle pedal opening information, and to superimpose the normal torque and the calibrated torque to obtain the current vehicle target torque on the slope where the vehicle is located; A motor controller (400) is connected to the vehicle controller (100) and controls the motor controller (400) to output a current vehicle target torque of the motor (401) through the vehicle controller (100); When the slope detection device (200) obtains slope information of the slope on which the vehicle is located that exceeds a predetermined threshold value, the vehicle controller (100) controls the alarm device (500) to issue a prompt message that the slope exceeds the maximum slope allowed by the vehicle.

6. The system according to claim 5, characterized in that The slope detection device (200) includes a slope state detection module (201) for acquiring slope information of the slope on which the vehicle is located, and feeding back the information to a slope data processing module (202); the slope data processing module (202) sends the acquired slope information of the slope on which the vehicle is located to the vehicle controller (100) via a slope communication module (203).

7. The system according to claim 5, characterized in that The alarm device (500) comprises a warning communication module (501) and a display module (502), and the vehicle controller (100) sends a prompt message of exceeding the maximum slope allowed by the vehicle to the display module (502) via the warning communication module (501).

8. A device using the torque control method for a new energy bus as claimed in claim 1, characterized in that: include: An acquisition unit (601) is used to acquire the slope information of the slope on which the vehicle is located and the current vehicle accelerator pedal opening information; A determination unit (602) is used to determine the normal torque of the vehicle when traveling on a horizontal road according to the current vehicle accelerator pedal opening information of the ramp on which the vehicle is located, and to superimpose the normal torque and the calibrated torque to obtain the current vehicle target torque of the ramp on which the vehicle is located; A control unit (600) is used to control the output torque of the motor (401) using the current vehicle target torque; The alarm unit (603) is used to issue an alarm prompt when the control unit (600) determines that the maximum slope allowed by the vehicle is exceeded.

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