A starting control method and device for an AMT vehicle

Abstract

The application discloses a starting control method and device for an AMT vehicle. When the engine is in a starting state and a request of engaging a forward gear is received, a starting gear is determined based on an intake pressure of the engine, a vehicle weight and a slope signal, the starting gear is engaged, and a current rotating speed of the engine is adjusted to be greater than a preset rotating speed according to the intake pressure. When a vehicle starting signal is received, a throttle opening degree is detected. A clutch engagement speed and an engagement depth are adjusted according to the intake pressure, the throttle opening degree and the starting gear so that a transmission input shaft rotating speed is greater than a target rotating speed, and after the current rotating speed of the engine is adjusted to be greater than the target rotating speed according to the intake pressure, it is determined that the AMT vehicle starts successfully. The starting gear can be adjusted according to the intake pressure, the adjusted starting gear can make the vehicle start steadily, and the vehicle will not stall due to low intake pressure, so that the user experience is improved.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and in particular to a starting control method and device for an AMT vehicle. Background Technology

[0002] In recent years, the use of automated mechanical transmissions (AMT) in the domestic commercial vehicle market has been increasing. This is because AMT does not require driver operation and can improve fuel economy. It can be seen that commercial vehicles equipped with AMT have good development prospects.

[0003] Currently, during the AMT (Automated Manual Transmission) start-up process, the clutch engagement primarily raises the transmission input shaft speed until the engine speed and transmission input shaft speed are synchronized. Once synchronized, the engine speed is controlled to increase, thus starting the vehicle. However, in high-altitude environments (atmospheric pressure is around 100 kPa in plains areas, but may drop to 70 kPa or lower at high altitudes; air pressure is negatively correlated with altitude, with lower pressure at higher altitudes), the engine intake pressure is lower. During a high-throttle start-up, the engine speed may drop too low during the synchronization phase, potentially causing stalling or even a poor user experience.

[0004] Therefore, how to improve the user experience has become an urgent problem to be solved in this field. Summary of the Invention

[0005] This application provides a starting control method and device for AMT vehicles, with the aim of improving the user experience.

[0006] To achieve the above objectives, this application provides the following technical solution:

[0007] A starting control method for an AMT vehicle, comprising:

[0008] When the engine is running and a request to engage a forward gear is received, the starting gear is determined based on the engine's intake pressure, vehicle weight, and gradient signals, and the gear is engaged. The engine's current speed is adjusted to be greater than a preset speed based on the intake pressure.

[0009] When a vehicle start signal is received, the throttle opening is detected;

[0010] The AMT vehicle starts successfully after adjusting the engagement speed and engagement depth of the clutch based on the intake pressure, the throttle opening, and the starting gear to make the transmission input shaft speed greater than the target speed, and after adjusting the current engine speed based on the intake pressure to be greater than the target speed; the target speed is greater than the preset speed.

[0011] Optionally, the step of collecting and determining the starting gear based on engine intake pressure, vehicle weight, and gradient signals includes:

[0012] Collect engine intake pressure, vehicle weight, and gradient signals;

[0013] Based on the preset correspondence between the vehicle weight and the slope signal and the starting gear, the starting gear corresponding to the vehicle weight and the slope signal is obtained;

[0014] When the intake pressure is not greater than a preset threshold, the starting gear is determined as the first gear;

[0015] When the intake pressure is greater than the preset threshold, the starting gear is determined to remain unchanged.

[0016] Optionally, adjusting the current engine speed to be greater than a preset speed based on the intake pressure includes:

[0017] If the intake pressure is greater than a preset threshold, the current engine speed will not be adjusted.

[0018] If the intake pressure is not greater than the preset threshold, the current speed of the engine is controlled to increase until the current speed of the engine is greater than the preset speed.

[0019] Optionally, determining that the AMT vehicle has successfully started includes adjusting the clutch engagement speed and engagement depth according to the intake pressure, the throttle opening, and the starting gear to make the transmission input shaft speed greater than the target speed, and adjusting the current engine speed according to the intake pressure to be greater than the target speed.

[0020] The engine speed limit is determined based on the throttle opening and the starting gear, and the engine speed is controlled to increase until the engine speed limit is reached; the engine speed limit is greater than the preset speed.

[0021] The clutch engagement speed is adjusted to slow engagement based on the intake pressure, and the clutch position is adjusted to a preset friction point position so that the gearbox input shaft speed is greater than the target preset speed.

[0022] When the current engine speed matches the transmission input shaft speed, the clutch is quickly engaged according to the intake pressure to make the transmission input shaft speed greater than the target speed. After adjusting the current engine speed according to the intake pressure to be greater than the target speed, the AMT vehicle is determined to have started successfully; the target speed is greater than the target preset speed.

[0023] Optionally, determining the limiting speed based on the throttle opening and the starting gear includes:

[0024] Based on the preset correspondence between the throttle opening and the starting gear and the engine speed, the engine speed corresponding to the throttle opening and the starting gear is obtained, and the engine speed is determined as the limit speed.

[0025] A starting control device for an AMT vehicle, comprising:

[0026] The transmission electronic control unit is used to collect and determine the starting gear based on the engine intake pressure, vehicle weight and slope signals when the engine is running and a request to engage a forward gear is received, and to engage the gear to the starting gear. It is also used to detect the throttle opening when a vehicle start signal is received. Furthermore, it is used to adjust the clutch engagement speed and engagement depth according to the intake pressure, the throttle opening and the starting gear to make the transmission input shaft speed greater than the target speed.

[0027] The engine electronic control unit is used to adjust the current engine speed to be greater than a preset speed based on the intake pressure, and to determine that the AMT vehicle has started successfully after adjusting the current engine speed to be greater than the target speed based on the intake pressure; the target speed is greater than the preset speed.

[0028] Optionally, the transmission electronic control unit collects and determines the starting gear based on engine intake pressure, vehicle weight, and gradient signals, specifically for:

[0029] Collect engine intake pressure, vehicle weight, and gradient signals;

[0030] Based on the preset correspondence between the vehicle weight and the slope signal and the starting gear, the starting gear corresponding to the vehicle weight and the slope signal is obtained;

[0031] When the intake pressure is not greater than a preset threshold, the starting gear is determined as the first gear;

[0032] When the intake pressure is greater than the preset threshold, the starting gear is determined to remain unchanged.

[0033] Optionally, the engine electronic control unit adjusts the current engine speed to be greater than a preset speed based on the intake pressure, specifically for:

[0034] If the intake pressure is greater than a preset threshold, the current engine speed will not be adjusted.

[0035] If the intake pressure is not greater than the preset threshold, the current speed of the engine is controlled to increase until the current speed of the engine is greater than the preset speed.

[0036] Optionally, the transmission electronic control unit adjusts the clutch engagement speed and engagement depth according to the intake pressure, the throttle opening, and the starting gear to make the transmission input shaft speed greater than the target speed, and the engine electronic control unit adjusts the current engine speed according to the intake pressure to be greater than the target speed, and then determines that the AMT vehicle has started successfully. Specifically, this is used for:

[0037] The transmission electronic control unit determines the speed limit based on the throttle opening and the starting gear, and the engine electronic control unit controls the current engine speed to rise until the speed limit is reached; the speed limit is greater than the preset speed.

[0038] The transmission electronic control unit adjusts the clutch engagement speed to slow engagement and the clutch position to a preset friction point position based on the intake pressure, so that the transmission input shaft speed is greater than the target preset speed.

[0039] When the current engine speed matches the transmission input shaft speed, the transmission electronic control unit controls the clutch to engage quickly based on the intake pressure, so that the transmission input shaft speed is greater than the target speed. After the engine electronic control unit adjusts the current engine speed to be greater than the target speed based on the intake pressure, it determines that the AMT vehicle has started successfully; the target speed is greater than the target preset speed.

[0040] Optionally, the engine electronic control unit determines the speed limit based on the throttle opening and the starting gear, specifically for:

[0041] Based on the preset correspondence between the throttle opening and the starting gear and the engine speed, the engine speed corresponding to the throttle opening and the starting gear is obtained, and the engine speed is determined as the limit speed.

[0042] The technical solution provided in this application, when the engine is running and a request to engage a forward gear is received, collects and determines the starting gear based on the engine's intake air pressure, vehicle weight, and slope signals, and engages the gear. It also adjusts the engine's current speed to be higher than a preset speed based on the intake air pressure. When a vehicle start signal is received, the throttle opening is detected. Based on the intake air pressure, throttle opening, and starting gear, the clutch engagement speed and engagement depth are adjusted to ensure the transmission input shaft speed is higher than the target speed. After adjusting the engine's current speed to be higher than the target speed based on the intake air pressure, the AMT vehicle is confirmed to have started successfully. The ability to adjust the starting gear based on intake air pressure allows for a smooth start, preventing stalling due to low intake air pressure, thus improving the user experience. Attached Figure Description

[0043] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0044] Figure 1 A flowchart illustrating a starting control method for an AMT vehicle provided in this application embodiment;

[0045] Figure 2 A flowchart illustrating a method for determining the starting gear according to an embodiment of this application;

[0046] Figure 3 A flowchart illustrating a method for adjusting rotational speed according to an embodiment of this application;

[0047] Figure 4 A schematic diagram illustrating the starting process of an AMT vehicle provided in an embodiment of this application;

[0048] Figure 5 This is a schematic diagram of the architecture of a starting control device for an AMT vehicle provided in an embodiment of this application. Detailed Implementation

[0049] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0050] In this application, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0051] like Figure 1 The diagram shows a flowchart of a starting control method for an AMT vehicle provided in an embodiment of this application. The method is applied to an electronic control unit (ECU), which includes a transmission ECU and an engine ECU, and includes the following steps:

[0052] S101: When the engine is running and a request to engage a forward gear is received, the engine intake pressure, vehicle weight, and slope signals are collected and the starting gear is determined and engaged. The engine speed is adjusted to be greater than the preset speed based on the intake pressure.

[0053] Among them, the vehicle weight indicates the current weight of the vehicle, and the slope signal indicates the slope the vehicle is on (e.g., 15°).

[0054] It should be noted that once the starting gear is engaged, the starting gear will be displayed on the instrument panel.

[0055] Understandably, before receiving a request to shift to drive, when the engine start signal is received (i.e., the driver turns the key to start the engine), the engine control unit (ECU) controls the engine to start and maintains the engine at idle speed (e.g., 550 rpm), and the instrument panel displays neutral.

[0056] Optionally, the transmission control unit (TCU) can receive the intake pressure from the engine by receiving CAN messages.

[0057] It should be noted that the starting gear is determined by collecting and using signals of engine intake pressure, vehicle weight, and slope. Specifically, different vehicle weights, slope information, and intake pressures correspond to different starting gears. Therefore, it is necessary to determine the starting gear based on the vehicle weight, slope information, and intake pressure.

[0058] It is important to emphasize that the engine's current speed should be adjusted to be higher than the preset speed based on the intake pressure. Specifically, if the intake pressure is relatively low, the TCU needs to adjust the speed to be higher. If the speed is too low, it will lead to insufficient power and cause the vehicle to stall. For example, if the original speed is 500 rpm, the speed should be increased to 600 rpm or higher.

[0059] Optionally, in another embodiment of this application, a specific implementation of step S101, which involves collecting and determining the starting gear based on engine intake pressure, vehicle weight, and slope signals, is as follows: Figure 2 As shown, it includes the following steps:

[0060] S201: Collects engine intake pressure, vehicle weight, and gradient signals.

[0061] This involves collecting signals of engine intake pressure, vehicle weight, and gradient to determine the appropriate starting gear, thus preventing the vehicle from starting unsuccessfully due to incorrect gear selection.

[0062] S202: Based on the preset correspondence between vehicle weight and slope signals and starting gear, obtain the starting gear corresponding to the vehicle weight and slope signals.

[0063] The preset correspondence between vehicle weight and slope signals and starting gear can be shown in Table 1.

[0064] Table 1

[0065] First slope signal First starting gear Second starting gear Second slope signal Second starting gear Third starting gear

[0066] It should be noted that the contents shown in Table 1 are for illustrative purposes only.

[0067] Specifically, assuming the slope signals are -10%, -6%, -3%, and 3%, and the vehicle weights are 10,000 kg, 30,000 kg, and 50,000 kg, the preset correspondence between vehicle weight, slope signals, and starting gear is shown in Table 2.

[0068] Table 2

[0069] -10％ 5 4 3 -6％ 5 4 3 -3％ 4 3 2 3％ 4 3 2

[0070] It should be noted that the contents shown in Table 2 are for illustrative purposes only.

[0071] S203: When the intake pressure is not greater than the preset threshold, the starting gear is set to the first gear.

[0072] In particular, the intake pressure in a high-altitude environment will be lower than that in a plain environment.

[0073] Understandably, when the intake pressure is not greater than the preset threshold, the starting gear will be lower, meaning the first gear is lower than the starting gear. Selecting a lower starting gear makes the AMT vehicle more stable when starting.

[0074] Optionally, the preset threshold can be selected according to the actual situation, and no specific restrictions are imposed here.

[0075] S204: When the intake pressure is greater than the preset threshold, the starting gear is determined to remain unchanged.

[0076] It is understandable that when the intake pressure is greater than the preset threshold, it means that the vehicle is in a flat environment. At this time, there will be no problem of low intake pressure causing the vehicle to start unsteadily. Therefore, the starting gear remains unchanged.

[0077] Optionally, in another embodiment of this application, a specific implementation of step S101, which adjusts the current engine speed to be greater than a preset speed based on the intake pressure, includes the following steps:

[0078] If the intake pressure is greater than the preset threshold, the current engine speed will not be adjusted.

[0079] Understandably, when the intake pressure is greater than the preset threshold, the intake pressure is higher and the power is sufficient, so there will be no phenomenon of insufficient power causing the vehicle to stall. Therefore, the current engine speed is not adjusted.

[0080] If the intake pressure is not greater than the preset threshold, the engine speed will be controlled to increase until the engine speed is greater than the preset speed.

[0081] It should be noted that when the intake pressure is not greater than the preset threshold, the intake pressure is low and the power is insufficient. At this time, the engine speed needs to be increased to avoid the vehicle stalling due to insufficient power. Therefore, the ECU controls the current engine speed to increase.

[0082] S102: When a vehicle start signal is received, the throttle opening is detected.

[0083] The vehicle start signal is the signal for the user to release the brake and press the accelerator.

[0084] Optionally, the throttle opening indicator shows the opening of the throttle pedal.

[0085] S103: After adjusting the clutch engagement speed and engagement depth according to the intake pressure, throttle opening and starting gear to make the transmission input shaft speed greater than the target speed, and after adjusting the current engine speed according to the intake pressure to be greater than the target speed, the AMT vehicle is confirmed to have started successfully.

[0086] The target speed is greater than the preset speed.

[0087] Understandably, the TCU adjusts the clutch engagement speed and engagement depth based on intake pressure, throttle opening, and starting gear. Specifically, the clutch engagement speed is adjusted differently depending on the situation. The clutch engagement speed can be adjusted to fast or slow engagement according to the actual situation, and adjusting the engagement depth is equivalent to adjusting the position of the clutch relative to the friction point.

[0088] It should be noted that the ECU adjusts the engine's current speed to be greater than the target speed based on the intake pressure. Specifically, the engine's current speed is adjusted according to different situations, but the final current engine speed is greater than the target speed.

[0089] Optionally, in another embodiment of this application, one specific implementation of step S103 is as follows: Figure 3 As shown, it includes the following steps:

[0090] S301: Determines the speed limit based on throttle opening and starting gear, and controls the engine's current speed to rise until the speed limit is reached.

[0091] Among them, the rotational speed is limited to be greater than the preset rotational speed.

[0092] It should be noted that the engine speed limit is determined based on the throttle opening and the starting gear. Since different throttle openings and different starting gears correspond to different engine speed limits, such as slow acceleration and hard acceleration (kickdown), and 2nd gear and 3rd gear, the engine speed limit needs to be determined first.

[0093] Understandably, the TCU sends the engine's control mode and speed limit to the ECU via CAN messages, so that the ECU can control the engine's current speed to increase according to the control mode and speed limit. Specifically, the control mode is the same for all of them, such as speed control mode, torque control mode, and speed limit control mode.

[0094] S302: Adjust the clutch engagement speed to slow engagement based on the intake air pressure, and adjust the clutch position to the preset friction point position so that the gearbox input shaft speed is greater than the target preset speed.

[0095] Specifically, the clutch engagement speed is adjusted to slow engagement based on the intake air pressure, and the clutch position is adjusted to the preset friction point position, so that the transmission input shaft speed slowly increases until the transmission input shaft speed is greater than the target preset speed.

[0096] S303: When the current engine speed matches the transmission input shaft speed, the clutch is quickly engaged based on the intake pressure to make the transmission input shaft speed greater than the target speed. After adjusting the current engine speed to be greater than the target speed based on the intake pressure, the AMT vehicle is confirmed to have started successfully.

[0097] The target speed is greater than the target preset speed.

[0098] Understandably, when the engine's current speed matches the transmission input shaft speed, the AMT vehicle has a certain speed. The clutch is quickly engaged based on the intake pressure to rapidly increase the transmission input shaft speed until it exceeds the target speed.

[0099] For details, please refer to Figure 4 The starting process of an AMT vehicle includes slow clutch engagement, fast clutch engagement to increase the transmission input shaft speed, and controlling the increase of the engine's current speed.

[0100] Optionally, in another embodiment of this application, a specific implementation of determining the speed limit based on the throttle opening and starting gear in step S103 includes the following steps:

[0101] Based on the preset correspondence between throttle opening and starting gear and engine speed, the engine speed corresponding to the throttle opening and starting gear is obtained, and the speed is determined as the limit speed.

[0102] Specifically, assuming the throttle opening is 30%, 60%, and 100%, and the starting gear is 1st, 2nd, 3rd, and 4th, the preset correspondence between throttle opening, starting gear, and engine speed is shown in Table 3.

[0103] Table 3

[0104] 1st gear 720 740 800 2nd gear 730 750 810 3rd gear 740 760 820 4 gears 750 770 830

[0105] It should be noted that the content in Table 3 above is for illustrative purposes only.

[0106] In summary, when the engine is running and a request to engage a forward gear is received, the system collects and determines the starting gear based on engine intake pressure, vehicle weight, and gradient signals, engages the gear, and adjusts the engine's current speed to be higher than a preset speed based on the intake pressure. When a vehicle start signal is received, the throttle opening is detected. The clutch engagement speed and depth are adjusted based on the intake pressure, throttle opening, and starting gear to ensure the transmission input shaft speed is higher than the target speed. After adjusting the engine's current speed to be higher than the target speed based on the intake pressure, the AMT vehicle is confirmed to have started successfully. In this implementation, the starting gear can be adjusted based on the intake pressure, allowing for a smooth start and preventing stalling due to low intake pressure, thus improving the user experience.

[0107] like Figure 5 The diagram shown is a schematic of the architecture of a starting control device for an AMT vehicle provided in an embodiment of this application. The starting control device (i.e., the electronic control unit) includes a transmission electronic control unit 100 and an engine electronic control unit 200.

[0108] The transmission electronic control unit 100 is used to collect and determine the starting gear based on the engine intake pressure, vehicle weight and slope signals when the engine is running and a request to engage a forward gear is received, and to engage the starting gear. It is also used to detect the throttle opening when a vehicle start signal is received. Furthermore, it is used to adjust the clutch engagement speed and engagement depth according to the intake pressure, throttle opening and starting gear to make the transmission input shaft speed greater than the target speed.

[0109] The transmission electronic control unit 100 is used to collect and determine the starting gear based on the engine intake pressure, vehicle weight, and slope signals. Specifically, it is used to: collect the engine intake pressure, vehicle weight, and slope signals; obtain the starting gear corresponding to the vehicle weight and slope signals based on the preset correspondence between the vehicle weight and slope signals and the starting gear; determine the starting gear as the first gear when the intake pressure is not greater than a preset threshold; and determine the starting gear to remain unchanged when the intake pressure is greater than the preset threshold.

[0110] The engine electronic control unit 200 is used to adjust the current engine speed according to the intake pressure to be greater than the preset speed, and to determine that the AMT vehicle has started successfully after adjusting the current engine speed according to the intake pressure to be greater than the target speed; the target speed is greater than the preset speed.

[0111] The engine electronic control unit 200 is used to adjust the current engine speed to be greater than a preset speed according to the intake pressure. Specifically, if the intake pressure is greater than a preset threshold, the current engine speed is not adjusted; if the intake pressure is not greater than the preset threshold, the current engine speed is controlled to increase until the current engine speed is greater than the preset speed.

[0112] The transmission electronic control unit 100 is used to adjust the clutch engagement speed and engagement depth according to the intake pressure, throttle opening, and starting gear to ensure that the transmission input shaft speed is greater than the target speed. The engine electronic control unit 200 is used to determine that the AMT vehicle has successfully started after adjusting the current engine speed according to the intake pressure to be greater than the target speed. Specifically, the transmission electronic control unit determines the speed limit according to the throttle opening and starting gear; the engine electronic control unit controls the current engine speed to rise until it reaches the speed limit; the speed limit is greater than the preset speed; the transmission electronic control unit adjusts the clutch engagement speed to slow engagement and adjusts the clutch position to the preset friction point position according to the intake pressure to ensure that the transmission input shaft speed is greater than the target preset speed; when the current engine speed matches the transmission input shaft speed, the transmission electronic control unit controls the clutch to engage quickly according to the intake pressure to ensure that the transmission input shaft speed is greater than the target speed; and the engine electronic control unit determines that the AMT vehicle has successfully started after adjusting the current engine speed according to the intake pressure to be greater than the target speed; the target speed is greater than the target preset speed.

[0113] The engine electronic control unit 200 is used to determine the limiting speed based on the throttle opening and starting gear. Specifically, it is used to: obtain the engine speed corresponding to the throttle opening and starting gear based on the preset correspondence between the throttle opening, starting gear and engine speed, and determine the speed as the limiting speed.

[0114] In summary, when the engine is running and a request to engage a forward gear is received, the system collects and determines the starting gear based on engine intake pressure, vehicle weight, and gradient signals, engages the gear, and adjusts the engine's current speed to be higher than a preset speed based on the intake pressure. When a vehicle start signal is received, the throttle opening is detected. The clutch engagement speed and depth are adjusted based on the intake pressure, throttle opening, and starting gear to ensure the transmission input shaft speed is higher than the target speed. After adjusting the engine's current speed to be higher than the target speed based on the intake pressure, the AMT vehicle is confirmed to have started successfully. In this implementation, the starting gear can be adjusted based on the intake pressure, allowing for a smooth start and preventing stalling due to low intake pressure, thus improving the user experience.

[0115] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0116] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A starting control method for an AMT vehicle, characterized in that, include: When the engine is running and a request to engage a forward gear is received, the starting gear is determined based on the engine's intake pressure, vehicle weight, and gradient signals, and the gear is engaged. The engine's current speed is adjusted to be greater than a preset speed based on the intake pressure. When a vehicle start signal is received, the throttle opening is detected; The AMT vehicle starts successfully after adjusting the clutch engagement speed and engagement depth according to the intake pressure, the throttle opening and the starting gear to make the transmission input shaft speed greater than the target speed, and adjusting the current engine speed according to the intake pressure to be greater than the target speed. The target rotational speed is greater than the preset rotational speed; The step of collecting and determining the starting gear based on engine intake pressure, vehicle weight, and slope signals includes: Collect engine intake pressure, vehicle weight, and gradient signals; Based on the preset correspondence between the vehicle weight and the slope signal and the starting gear, the starting gear corresponding to the vehicle weight and the slope signal is obtained; When the intake pressure is not greater than a preset threshold, the starting gear is determined as the first gear; When the intake pressure is greater than the preset threshold, the starting gear is determined to remain unchanged; The step of adjusting the current engine speed to be greater than a preset speed based on the intake pressure includes: If the intake pressure is greater than a preset threshold, the current engine speed will not be adjusted. If the intake pressure is not greater than the preset threshold, the current speed of the engine is controlled to increase until the current speed of the engine is greater than the preset speed.

2. The method according to claim 1, characterized in that, The step of adjusting the clutch engagement speed and engagement depth according to the intake pressure, the throttle opening, and the starting gear to make the transmission input shaft speed greater than the target speed, and adjusting the current engine speed according to the intake pressure to be greater than the target speed, to determine that the AMT vehicle has started successfully includes: The engine speed limit is determined based on the throttle opening and the starting gear, and the engine speed is controlled to increase until the engine speed limit is reached; the engine speed limit is greater than the preset engine speed. The clutch engagement speed is adjusted to slow engagement based on the intake pressure, and the clutch position is adjusted to a preset friction point position so that the gearbox input shaft speed is greater than the target preset speed. When the current engine speed matches the transmission input shaft speed, the clutch is quickly engaged according to the intake pressure to make the transmission input shaft speed greater than the target speed. After adjusting the current engine speed according to the intake pressure to be greater than the target speed, the AMT vehicle is determined to have started successfully; the target speed is greater than the target preset speed.

3. The method according to claim 2, characterized in that, The step of determining the speed limit based on the throttle opening and the starting gear includes: Based on the preset correspondence between the throttle opening and the starting gear and the engine speed, the engine speed corresponding to the throttle opening and the starting gear is obtained, and the engine speed is determined as the limit speed.

4. A starting control device for an AMT vehicle, characterized in that, include: The transmission electronic control unit is used to collect and determine the starting gear based on the engine intake pressure, vehicle weight and slope signals when the engine is running and a request to engage a forward gear is received, and to engage the gear to the starting gear. It is also used to detect the throttle opening when a vehicle start signal is received. Furthermore, it is used to adjust the clutch engagement speed and engagement depth according to the intake pressure, the throttle opening and the starting gear to make the transmission input shaft speed greater than the target speed. The engine electronic control unit is used to adjust the current engine speed to be greater than a preset speed based on the intake pressure, and to determine that the AMT vehicle has started successfully after adjusting the current engine speed to be greater than the target speed based on the intake pressure; the target speed is greater than the preset speed. The transmission electronic control unit collects and determines the starting gear based on engine intake pressure, vehicle weight, and gradient signals, specifically for: Collect engine intake pressure, vehicle weight, and gradient signals; Based on the preset correspondence between the vehicle weight and the slope signal and the starting gear, the starting gear corresponding to the vehicle weight and the slope signal is obtained; When the intake pressure is not greater than a preset threshold, the starting gear is determined as the first gear; When the intake pressure is greater than the preset threshold, the starting gear is determined to remain unchanged; Specifically, the engine electronic control unit adjusts the current engine speed to be greater than a preset speed based on the intake pressure, and is used for: If the intake pressure is greater than a preset threshold, the current engine speed will not be adjusted. If the intake pressure is not greater than the preset threshold, the current speed of the engine is controlled to increase until the current speed of the engine is greater than the preset speed.

5. The apparatus according to claim 4, characterized in that, The transmission electronic control unit adjusts the clutch engagement speed and engagement depth based on the intake pressure, throttle opening, and starting gear to ensure the transmission input shaft speed is greater than the target speed. The engine electronic control unit adjusts the engine's current speed based on the intake pressure to be greater than the target speed. After this adjustment, the AMT vehicle is confirmed to have successfully started. Specifically, this is used for: The transmission electronic control unit determines the speed limit based on the throttle opening and the starting gear, and the engine electronic control unit controls the current engine speed to rise until the speed limit is reached; the speed limit is greater than the preset speed. The transmission electronic control unit adjusts the clutch engagement speed to slow engagement and the clutch position to a preset friction point position based on the intake pressure, so that the transmission input shaft speed is greater than the target preset speed. When the current engine speed matches the transmission input shaft speed, the transmission electronic control unit controls the clutch to engage quickly based on the intake pressure, so that the transmission input shaft speed is greater than the target speed. After the engine electronic control unit adjusts the current engine speed to be greater than the target speed based on the intake pressure, it determines that the AMT vehicle has started successfully; the target speed is greater than the target preset speed.

6. The apparatus according to claim 5, characterized in that, The engine electronic control unit determines the speed limit based on the throttle opening and the starting gear, specifically for: Based on the preset correspondence between the throttle opening and the starting gear and the engine speed, the engine speed corresponding to the throttle opening and the starting gear is obtained, and the engine speed is determined as the limit speed.

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