AMT control method, device and equipment after vehicle engine is turned off and storage medium

Abstract

A control method, device and equipment of an AMT after vehicle flameout coasting, and a computer readable storage medium, comprising: when it is determined that a target vehicle does not meet a flameout coasting condition, a flameout exit instruction is received, and a flameout mode of the flameout exit instruction is determined; if it is determined that the flameout mode is a flameout coasting exit mode, whether a reverse drag condition is met is determined according to obtained running state information of the target vehicle; if it is determined that the reverse drag condition is met, an engine, a transmission auxiliary gearbox gear position and a clutch are controlled to make the target vehicle exit a flameout coasting state; if it is determined that the reverse drag condition is not met, a starter is controlled to make the target vehicle exit the flameout coasting state, thereby solving a technical problem in the related art that a vehicle cannot safely exit flameout coasting in the case of neutral coasting flameout, and achieving an effect of safely exiting flameout coasting of the vehicle.

Description

Technical Field

[0001] This application relates to the field of transmission control, specifically to a control method, device, equipment, and computer-readable storage medium for an automated manual transmission (AMT) after a vehicle has been turned off and is coasting. Background Technology

[0002] In commercial vehicle operation scenarios such as long-haul transportation and urban logistics distribution, vehicles frequently traverse flat roads and gentle slopes with a gradient of ≤±3%, resulting in numerous opportunities for coasting due to inertia and presenting significant potential for energy conservation and consumption reduction. Traditional vehicles continuously idle while coasting in gear, leading to inefficient fuel consumption. To improve fuel economy, the industry commonly employs neutral coasting mode to reduce energy consumption. However, intelligent engine shutdown coasting technology can completely shut off the engine during coasting, relying on vehicle inertia and the battery to maintain basic power supply to the vehicle. Compared to conventional coasting mode, this technology offers significant energy savings and is one of the core technological directions for cost reduction and efficiency improvement in commercial vehicles. However, current methods do not allow vehicles to safely exit the engine-off coasting state when coasting in neutral with the engine off. Summary of the Invention

[0003] This application provides a control method, device, equipment, and computer-readable storage medium for an AMT (Automated Manual Transmission) after a vehicle has been coasted with the engine off. This can solve the technical problem in the prior art that the vehicle cannot safely exit the coasting state when it is coasting in neutral with the engine off.

[0004] In a first aspect, embodiments of this application provide a control method for an automated manual transmission (AMT) after a vehicle has been coasted with its engine off, including: When it is determined that the target vehicle does not meet the conditions for coasting with the engine off, an exit shutdown command is received, and the shutdown mode of the exit shutdown command is determined. If the engine shutdown mode is determined to be exiting the engine shutdown coasting mode, the anti-towing conditions are determined based on the obtained operating status information of the target vehicle. If the anti-towing conditions are determined to be met, the engine, transmission auxiliary gearbox, and clutch are controlled to cause the target vehicle to exit the coasting state with the engine off. If it is determined that the anti-towing condition is not met, the starter motor is controlled to cause the target vehicle to exit the coasting state with the engine off.

[0005] In conjunction with the first aspect, in one implementation, after determining the shutdown mode based on the first operating status information of the target vehicle upon receiving a request to exit the engine shutdown command, the method further includes: If the engine shutdown mode is determined to be only exiting coasting mode without exiting neutral mode, the engine will be turned to restart according to the starter mode.

[0006] In conjunction with the first aspect, in one implementation, determining whether the anti-towing condition is met based on the obtained operating status information of the target vehicle includes: The system acquires the gear information of the target vehicle before it exits the coasting mode, the gear information of the target vehicle after it exits the coasting mode, the current vehicle speed, the vehicle load, the current accelerator pedal opening, the status of the transmission and clutch, and the air supply pressure. If the gear information before the vehicle exits the coasting mode and the gear information after exiting the coasting mode belong to the same shift sequence, the current vehicle speed is greater than the first preset vehicle speed, the vehicle load is greater than the first preset load threshold, the current accelerator pedal opening is less than the preset opening threshold, the gearbox and clutch are in a safe state, and the air supply pressure is greater than the pressure threshold, then the anti-towing condition is determined to be met.

[0007] In conjunction with the first aspect, in one embodiment, controlling the engine, the auxiliary gearbox, and the clutch to cause the target vehicle to exit the coasting state with the engine off includes: Controls the interruption of power connection between the engine and the clutch; Control the gear shift of the auxiliary gearbox and synchronize the speeds at both ends; Control the clutch to engage slowly, transmitting power from the output shaft to the engine; When the engine speed reaches the target speed, a reverse drag signal is sent to the engine control unit to restart the engine, so that the target vehicle can exit the coasting state with the engine off.

[0008] In conjunction with the first aspect, in one embodiment, controlling the starter motor to cause the target vehicle to exit the coasting state with the engine off includes: By receiving the starter motor start command, the starter motor is controlled to operate; When it is detected that the motor of the starter motor is working and the engine speed reaches the target speed, the target vehicle is taken out of the coasting state with the engine off.

[0009] In conjunction with the first aspect, in one embodiment, after the controlled clutch slowly engages to transmit power from the output shaft to the engine, the method further includes: If the engine speed is not detected to reach the target speed point within the first preset time period, the starter motor is controlled to cause the target vehicle to exit the coasting state with the engine off.

[0010] In conjunction with the first aspect, after controlling the starter motor as described in one embodiment, the method further includes: If the engine speed is not detected to reach the target speed point within the second preset time period, the engine, transmission auxiliary gear and clutch are controlled to make the target vehicle exit the coasting state with the engine off.

[0011] In conjunction with the first aspect, in one implementation, after determining the shutdown mode of the exit shutdown command, the method further includes: If it is determined that the engine shutdown mode is to exit coasting without exiting neutral mode, then the starter motor is controlled to cause the target vehicle to exit the coasting state.

[0012] Secondly, embodiments of this application provide a control device for an automated manual transmission (AMT) after a vehicle has been turned off and is coasting. The control device for the AMT after a vehicle has been turned off and is coasting includes: The receiving and determining module is used to receive an exit shutdown command when it is determined that the target vehicle does not meet the conditions for coasting with the engine off, and to determine the shutdown mode of the exit shutdown command. The determination module is used to determine whether the anti-towing condition is met based on the obtained operating status information of the target vehicle when the engine shutdown mode is determined to be exiting the engine shutdown coasting mode. The first control module is used to control the engine, the gearbox auxiliary gear and the clutch if it is determined that the anti-towing condition is met, so as to make the target vehicle exit the coasting state with the engine off. The second control module is used to control the starter motor if it is determined that the anti-towing condition is not met, so as to cause the target vehicle to exit the coasting state with the engine off.

[0013] Thirdly, embodiments of this application provide a control device for an automated manual transmission (AMT) after a vehicle has been turned off and coasted. The control device includes a processor, a memory, and a control program for the AMT after the vehicle has been turned off and coasted, which is stored in the memory and can be executed by the processor. When the control program for the AMT after the vehicle has been turned off and coasted is executed by the processor, it implements the steps of the control method for the AMT after the vehicle has been turned off and coasted as described above.

[0014] Fourthly, embodiments of this application provide a computer-readable storage medium storing a control program for an automated manual transmission (AMT) after a vehicle has been turned off and is coasting. When the control program for the AMT after a vehicle has been turned off and is executed by a processor, it implements the steps of the control method for the AMT after a vehicle has been turned off and is coasting as described above.

[0015] The beneficial effects of the technical solutions provided in this application include: When the target vehicle does not meet the conditions for coasting with the engine off, an exit shutdown command is received, and the shutdown mode of the exit shutdown command is determined. If the shutdown mode is determined to be the exit shutdown coasting mode, the anti-towing condition is determined based on the obtained operating status information of the target vehicle. If the anti-towing condition is met, the engine, transmission auxiliary gear, and clutch are controlled to allow the target vehicle to exit the coasting state with the engine off. If the anti-towing condition is not met, the starter motor is controlled to allow the target vehicle to exit the coasting state with the engine off. This solves the technical problem in related technologies where the vehicle cannot safely exit the coasting state with the engine off when coasting in neutral, and achieves the effect of safely exiting the coasting state with the engine off. Attached Figure Description

[0016] Figure 1 This is a flowchart illustrating the first embodiment of the AMT control method for a vehicle coasting after engine shutdown, as described in this application. Figure 2 This is a schematic diagram of the functional modules of an embodiment of the AMT control device for coasting after the vehicle is turned off, according to this application. Figure 3 This is a schematic diagram of the hardware structure of the AMT control device after the vehicle is turned off and coasting, as described in the embodiments of this application. Detailed Implementation

[0017] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0018] First, some of the technical terms used in this application will be explained to help those skilled in the art understand this application.

[0019] PDCU (Powertrain Control Unit): A controller that controls and coordinates the various controllers of the powertrain. In some control systems, it is also called VCU. In this application, it is mainly responsible for the overall coordination and status management of coasting with the engine off.

[0020] TCU (Transmission Control Unit): Responsible for clutch control, gear selection, and reverse drag / starter switching.

[0021] ECU (Engine Control Unit): Responsible for engine ignition, shutdown, and starter control.

[0022] AMT (Automated Manual Transmission): A semi-automatic transmission that uses a controller to control shift forks and clutch pressure plate. Due to its simple structure and low cost, it is often used in heavy commercial vehicles.

[0023] MPCC (Model Predictive Contour Control): An autonomous driving control algorithm that uses information such as map slope, road conditions ahead, and cruise status to control the throttle and pedal for vehicle speed and cruise, as well as the gear shift and coasting control of the transmission.

[0024] J1939 (communication protocol): is a recommended standard of the Society of Automotive Engineers (SAE) and a commonly used protocol in CAN communication development. It provides a standard architecture for communication between electronic components in medium and heavy-duty road vehicles.

[0025] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0026] In a first aspect, embodiments of this application provide a control method for an AMT (Automated Manual Transmission) after a vehicle has been turned off and is coasting.

[0027] In one embodiment, reference is made to Figure 1 , Figure 1 This is a flowchart illustrating the first embodiment of the AMT control method for a vehicle coasting after engine shutdown, as described in this application. Figure 1 As shown, the control method of AMT after the vehicle is turned off and coasting includes: As an example, when the target vehicle is cruising, the MPCC (Multi-Level Control Unit) uses map, vehicle speed, and gear information to determine if the road conditions ahead and the current state meet the requirements for coasting. The engine can be shut off during coasting to save fuel. At this time, the PDCU (Planet Control Unit) sends periodic message signals to the bus via J1939: a request for neutral and a flag indicating permission to enter coasting with the engine off. The TCU (Transmission Control Unit) receives the neutral command and permission flag on the J1939 bus and performs clutch and gear control to achieve neutral: first, the clutch disengages, interrupting the powertrain; after disengagement, the auxiliary gearbox returns to neutral; after returning to neutral, the transmission is in neutral. After completing this process, the TCU sends a neutral signal message via the J1939 bus and, after a short delay, re-engages the clutch to reset the clutch diaphragm spring. Upon receiving the neutral signal from the TCU, the EECU (Engine Control Unit) shuts off the engine. At this stage, the target vehicle has entered coasting with the engine off and continues to coast.

[0028] Step S10: When the target vehicle does not meet the conditions for coasting with the engine off, a shutdown command is received, and the shutdown mode of the shutdown command is determined. As an example, if the target vehicle does not meet the conditions for coasting with the engine off, a request to exit the engine shutdown command is received from the PDCU. The engine shutdown mode is determined based on the exit shutdown command. The engine shutdown mode includes exiting the coasting with the engine off mode and exiting the coasting with the engine off mode without disengaging from neutral. For example, the target vehicle's status information is obtained, and the engine shutdown mode is determined based on this information. The engine shutdown mode includes exiting the coasting with the engine off mode without disengaging from neutral and exiting the coasting with the engine off mode. The status information includes engine status information, transmission status information, accelerator pedal opening information, and safety interlock information. For example, if the engine speed has reached the idle threshold (e.g., >600 rpm) and the stable operation flag is "true", the transmission synchronizer is not ready or the difference between the input shaft speed and the target gear speed is too large, the accelerator pedal opening is less than the first threshold, the system detects certain non-fatal faults (e.g., air pressure is slightly low but sufficient to keep the engine running, not enough to engage gears), or the brake pedal is depressed, it is determined that the engine should only be exited without exiting neutral mode. Exiting the engine-only-without-exiting-neutral mode is indicated by the TCU maintaining neutral, and the ECU maintains engine idle speed fuel injection without engaging the clutch. If the engine restart success flag is "true", the transmission target gear synchronization is completed, and the clutch engagement conditions are met, the accelerator pedal opening is greater than the second threshold (indicating that the driver urgently needs power) or the preset coasting end conditions are met (e.g., uphill prediction ahead), the system is fault-free, and the air pressure and voltage are within the normal gear engagement range, then it is determined that the engine-off coasting mode should be exited.

[0029] Step S20: If it is determined that the engine shutdown mode is to exit the engine shutdown coasting mode, determine whether the anti-towing condition is met based on the obtained operating status information of the target vehicle. As an example, if the engine shutdown mode is determined to be exiting the engine shutdown coasting mode, the operating status information of the target vehicle is obtained. Based on the obtained operating status information of the target vehicle, it is determined whether the anti-towing conditions are met. The operating status information includes the gear information of the target vehicle before exiting the engine shutdown coasting mode, the gear information of the target vehicle after exiting the engine shutdown coasting mode, the current vehicle speed, the vehicle load, the current accelerator pedal opening, the status of the transmission and clutch, and the air supply pressure.

[0030] Specifically, determining whether the anti-towing conditions are met based on the obtained operating status information of the target vehicle includes: obtaining the gear information of the target vehicle before exiting the coasting mode, the gear information of the target vehicle after exiting the coasting mode, the current vehicle speed, the vehicle load, the current accelerator pedal opening, the status of the transmission and clutch, and the air supply pressure; if the gear information before exiting the coasting mode and the gear information after exiting the coasting mode belong to the same shift sequence, the current vehicle speed is greater than a first preset vehicle speed, the vehicle load is greater than a first preset load threshold, the current accelerator pedal opening is less than a preset opening threshold, the status of the transmission and clutch is a safe state, and the air supply pressure is greater than a pressure threshold, then the anti-towing conditions are determined to be met.

[0031] As an example, based on the gearbox gear s1 before entering the coasting phase (this gear is recorded by the program when entering the coasting phase), and the target gear s2 to be entered after exiting the coasting phase, the first condition for reverse towing is met when the recorded gear s1 and the target gear s2 are in the same shift sequence. Based on the current vehicle speed v and the vehicle load m calculated in the current program, the second condition for reverse towing is met when both v and m are greater than a certain threshold. The TCU receives the accelerator pedal signal, and when it determines that the driver is not pressing the accelerator suddenly, the third condition for reverse towing is met. The TCU internally diagnoses hardware faults and transmission air supply pressure. When there are no clutch or gear-related faults and the air supply pressure is greater than a certain threshold, the fourth condition for reverse towing is met.

[0032] Step S30: If it is determined that the anti-towing condition is met, then the engine, transmission auxiliary gearbox, and clutch are controlled to cause the target vehicle to exit the coasting state with the engine off. As an example, once the anti-towing conditions are met, the anti-towing start permission flag is triggered. At this point, the TCU determines that anti-towing start is possible and executes the anti-towing procedure: First, the engine and clutch are disconnected. Then, the transmission auxiliary gearbox is engaged. The speeds at both ends of the auxiliary gearbox are synchronized through the hardware synchronization process of the transmission auxiliary gearbox synchronizer. At this point, the transmission power chain is engaged. Then, the clutch is slowly engaged, and the power from the output shaft is transmitted to the engine through the clutch's forward pressure, thus increasing the engine speed. The speed of the clutch's forward pressure affects the delay of the entire anti-towing engine start. If it is too slow, the power recovery delay is relatively high from when the driver intends to exit the engine by pressing the accelerator or brake until the engine completes the anti-towing. If the clutch's forward pressure is too fast, the instantaneous drag from the engine to the entire vehicle during anti-towing will be too obvious, and a noticeable jerk can be felt in the cab. Therefore, the speed of the clutch's forward pressure is optimized through calibration testing. When the clutch is pressed forward to engage reverse drag, the TCU will start sending a reverse drag signal to the EECU via the bus when the engine speed reaches the first speed point n1. When the engine speed reaches the second speed point n2, the TCU will stop sending the reverse drag signal. At this point, the engine reverse drag is successfully completed, and after the engine speed stabilizes, normal driving begins, causing the target vehicle to exit the coasting state with the engine off.

[0033] Specifically, after the control clutch slowly engages and transmits power from the output shaft to the engine, the method further includes: if the engine speed is not detected to reach the target speed point within a first preset time period, then controlling the starter motor to cause the target vehicle to exit the coasting state with the engine off.

[0034] As an example, if the transmission's auxiliary gear shift time exceeds a certain threshold t2 without shifting, or the clutch depressurization time exceeds a certain threshold t3 without successful anti-drag, and the engine speed does not meet the condition of reaching speed point n1, the TCU determines that the anti-drag step has failed. The TCU sends a starter motor start command via the communication bus. After receiving the start command, the ECU controls the starter motor to start the engine. The TCU will stop sending commands only when it detects that the engine speed has reached a certain speed threshold n1, or when the time it takes to send the starter motor start command exceeds a certain threshold t1. At this point, the engine restart is complete, and the transmission shifts into gear to drive, causing the target vehicle to exit the coasting state with the engine off.

[0035] Step S40: If it is determined that the anti-towing condition is not met, the starter motor is controlled to cause the target vehicle to exit the coasting state with the engine off.

[0036] As an example, if the TCU determines that the anti-towing conditions are not met, it will initiate starter motor activation: the TCU sends a starter motor activation command via the communication bus. Upon receiving the command, the ECU controls the starter motor to start the engine. The TCU will only stop sending commands when it detects that the engine speed has reached a certain threshold speed n1, or when the time since the TCU sent the starter motor activation command exceeds a certain threshold t1. At this point, the engine restart is complete, and the transmission shifts into gear to engage driving, thus removing the vehicle from the coasting state.

[0037] Specifically, after determining the engine shutdown mode of the exit shutdown command, the method further includes: if the engine shutdown mode is determined to be exiting the engine shutdown coasting mode without exiting the neutral mode, then controlling the starter motor to cause the target vehicle to exit the engine shutdown coasting state.

[0038] As an example, when the TCU only exits the engine-off coasting state, the PDCU will simply change the previously sent permission to enter engine-off coasting to "No," while maintaining the neutral gear request. Upon receiving this command, the TCU will send a starter motor start command to the bus, starting the engine and changing the vehicle from engine-off coasting to neutral coasting. Subsequently, when the PDCU requests to exit neutral coasting, the TCU receives the command, engages a gear, and the vehicle returns to normal driving mode, thus exiting the engine-off coasting state.

[0039] Specifically, if it is determined that the anti-towing condition is not met, after controlling the starter motor, the method further includes: if it is detected that the engine speed has not reached the target speed point within a second preset time period, then controlling the engine, the gearbox auxiliary gear and the clutch to make the target vehicle exit the coasting state with the engine off.

[0040] As an example, if the TCU sends a starter start command via the communication bus for more than a certain time threshold t4 and the engine speed is still zero, the TCU determines that the starter has failed. At this point, the TCU controls the transmission to enter a forced reverse-dragging procedure. First, the engine and clutch are disconnected. Then, the transmission's auxiliary gearbox is engaged. The speeds at both ends of the auxiliary gearbox are synchronized through a hardware synchronization process using the auxiliary gearbox synchronizer. At this point, the transmission powertrain is engaged. Then, the clutch is slowly engaged, and the power from the output shaft is transmitted to the engine through the clutch's forward pressure, raising the engine speed. The speed of the clutch's forward pressure affects the delay of the entire reverse-dragging engine start-up. If it is too slow, the power recovery delay is high from when the driver intends to exit the engine by pressing the accelerator or brake until the engine completes the reverse-dragging. If the clutch's forward pressure is too fast, the instantaneous drag from the engine to the vehicle during reverse-dragging will be too obvious, causing a noticeable jolt in the passenger compartment. Therefore, the speed of the clutch's forward pressure is optimized through calibration testing. When the clutch is pressed forward to engage reverse drag, the TCU will start sending a reverse drag signal to the EECU via the bus when the engine speed reaches the first speed point n1. When the engine speed reaches the second speed point n2, the TCU will stop sending the reverse drag signal. At this point, the engine reverse drag is successfully completed, and after the engine speed stabilizes, normal driving begins, causing the target vehicle to exit the coasting state with the engine off.

[0041] In this embodiment, when it is determined that the target vehicle does not meet the conditions for coasting with the engine off, an exit shutdown command is received, and the shutdown mode of the exit shutdown command is determined. If the shutdown mode is determined to be the exit shutdown coasting mode, the anti-towing condition is determined based on the obtained operating status information of the target vehicle. If the anti-towing condition is determined to be met, the engine, transmission auxiliary gear, and clutch are controlled to allow the target vehicle to exit the coasting state with the engine off. If the anti-towing condition is determined not to be met, the starter motor is controlled to allow the target vehicle to exit the coasting state with the engine off. This solves the technical problem in related technologies where the vehicle cannot safely exit the coasting state with the engine off when coasting in neutral, and achieves the effect of safely exiting the coasting state with the engine off.

[0042] Secondly, embodiments of this application also provide a control device for an AMT (Automated Manual Transmission) after a vehicle has been turned off and is coasting.

[0043] In one embodiment, reference is made to Figure 2 , Figure 2 This is a functional module diagram of an embodiment of the AMT control device for coasting after the vehicle is turned off, according to this application. Figure 2 As shown, the AMT control device after the vehicle is coasting with the engine off includes: The receiving and determining module 10 is used to receive an exit shutdown command when the target vehicle does not meet the conditions for coasting with the engine off, and to determine the shutdown mode of the exit shutdown command. The determination module 20 is used to determine whether the anti-towing condition is met based on the obtained operating status information of the target vehicle when the engine shutdown mode is determined to be exiting the engine shutdown coasting mode. The first control module 30 is used to control the engine, the gearbox auxiliary gear and the clutch if it is determined that the anti-towing condition is met, so as to make the target vehicle exit the coasting state with the engine off. The second control module 40 is used to control the starter motor if it is determined that the anti-towing condition is not met, so as to cause the target vehicle to exit the coasting state with the engine off.

[0044] Furthermore, in one embodiment, the determining module 20 is configured to: The system acquires the gear information of the target vehicle before it exits the coasting mode, the gear information of the target vehicle after it exits the coasting mode, the current vehicle speed, the vehicle load, the current accelerator pedal opening, the status of the transmission and clutch, and the air supply pressure. If the gear information before the vehicle exits the coasting mode and the gear information after exiting the coasting mode belong to the same shift sequence, the current vehicle speed is greater than the first preset vehicle speed, the vehicle load is greater than the first preset load threshold, the current accelerator pedal opening is less than the preset opening threshold, the gearbox and clutch are in a safe state, and the air supply pressure is greater than the pressure threshold, then the anti-towing condition is determined to be met.

[0045] Furthermore, in one embodiment, the first control module 30 is used for: Controls the interruption of power connection between the engine and the clutch; Control the gear shift of the auxiliary gearbox and synchronize the speeds at both ends; Control the clutch to engage slowly, transmitting power from the output shaft to the engine; When the engine speed reaches the target speed, a reverse drag signal is sent to the engine control unit to restart the engine, so that the target vehicle can exit the coasting state with the engine off.

[0046] Furthermore, in one embodiment, the second control module 40 is used for: By receiving the starter motor start command, the starter motor is controlled to operate; When it is detected that the motor of the starter motor is working and the engine speed reaches the target speed, the target vehicle is taken out of the coasting state with the engine off.

[0047] Furthermore, in one embodiment, the AMT control device after the vehicle has been turned off and is coasting further includes a new module for: If the engine speed is not detected to reach the target speed point within the first preset time period, the starter motor is controlled to cause the target vehicle to exit the coasting state with the engine off.

[0048] Furthermore, in one embodiment, the AMT control device after the vehicle has been turned off and is coasting further includes a new module for: If it is determined that the anti-drag condition is not met, after controlling the starter motor, the method further includes: If the engine speed is not detected to reach the target speed point within the second preset time period, the engine, transmission auxiliary gear and clutch are controlled to make the target vehicle exit the coasting state with the engine off.

[0049] Furthermore, in one embodiment, the AMT control device after the vehicle has been turned off and is coasting further includes a new module for: If it is determined that the engine shutdown mode is to exit coasting without exiting neutral mode, then the starter motor is controlled to cause the target vehicle to exit the coasting state.

[0050] The functions of each module in the AMT control device after the vehicle is turned off and coasting correspond to the steps in the AMT control method embodiment after the vehicle is turned off and coasting. Their functions and implementation processes will not be described in detail here.

[0051] Thirdly, embodiments of this application provide a control device for an AMT (Automated Manual Transmission) after a vehicle has been turned off and is coasting. The control device for the AMT after a vehicle has been turned off and is coasting can be a personal computer (PC), a laptop computer, a server, or other devices with data processing capabilities.

[0052] Reference Figure 3 , Figure 3 This is a schematic diagram of the hardware structure of the AMT control device after the vehicle is turned off and coasting, as described in an embodiment of this application. In this embodiment, the AMT control device after the vehicle is turned off and coasting may include a processor, a memory, a communication interface, and a communication bus.

[0053] The communication bus can be of any type and is used to interconnect the processor, memory, and communication interface.

[0054] The communication interface includes input / output (I / O) interfaces, physical interfaces, and logical interfaces. These interfaces enable interconnection of internal components within the AMT control equipment after the vehicle has turned off and is coasting. They also enable interconnection between the AMT control equipment and other devices (such as other computing devices or user equipment) after the vehicle has turned off and is coasting. Physical interfaces can be Ethernet interfaces, fiber optic interfaces, ATM interfaces, etc.; user equipment can be displays, keyboards, etc.

[0055] Memory can be various types of storage media, such as random access memory (RAM), read-only memory (ROM), non-volatile RAM (NVRAM), flash memory, optical storage, hard disk, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), etc.

[0056] The processor can be a general-purpose processor, which can call the control program for the AMT (Automated Manual Transmission) after the vehicle is turned off and coasting, stored in the memory, and execute the control method for the AMT after the vehicle is turned off and coasting provided in the embodiments of this application. For example, the general-purpose processor can be a central processing unit (CPU). The method executed when the control program for the AMT after the vehicle is turned off and coasting is called can refer to the various embodiments of the control method for the AMT after the vehicle is turned off and coasting provided in this application, and will not be repeated here.

[0057] Those skilled in the art will understand that Figure 3 The hardware structure shown does not constitute a limitation of this application and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0058] Fourthly, embodiments of this application also provide a computer-readable storage medium.

[0059] The present application provides a computer-readable storage medium storing a control program for an automated manual transmission (AMT) after a vehicle has been turned off and is coasting. When the control program for the AMT after a vehicle has been turned off and is executed by a processor, it implements the steps of the control method for the AMT after a vehicle has been turned off and is coasting as described above.

[0060] The method implemented when the AMT control program is executed after the vehicle is turned off and coasting can be referred to in various embodiments of the AMT control method after the vehicle is turned off and coasting in this application, and will not be repeated here.

[0061] It should be noted that the sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0062] The terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such process, method, product, or apparatus. The terms "first," "second," and "third," etc., are used to distinguish different objects, etc., and do not indicate a sequence, nor do they limit "first," "second," and "third" to different types.

[0063] In the description of the embodiments of this application, terms such as "exemplary," "for example," or "for instance" are used to indicate examples, illustrations, or explanations. Any embodiment or design described as "exemplary," "for example," or "for instance" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary," "for example," or "for instance" is intended to present the relevant concepts in a concrete manner.

[0064] In the description of the embodiments of this application, unless otherwise stated, " / " means "or". For example, A / B can mean A or B. The "and / or" in the text is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of this application, "multiple" means two or more.

[0065] In some processes described in the embodiments of this application, multiple operations or steps are included in a specific order. However, it should be understood that these operations or steps may not be executed in the order they appear in the embodiments of this application, or they may be executed in parallel. The sequence number of the operation is only used to distinguish different operations, and the sequence number itself does not represent any execution order. In addition, these processes may include more or fewer operations, and these operations or steps may be executed sequentially or in parallel, and these operations or steps may be combined.

[0066] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes several instructions to cause a terminal device to execute the methods described in the various embodiments of this application.

[0067] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A control method for an AMT (Automated Manual Transmission) after a vehicle has been turned off and is coasting, characterized in that, include: When the target vehicle does not meet the conditions for coasting with the engine off, an exit shutdown command is received, and the shutdown mode of the exit shutdown command is determined. If the engine shutdown mode is determined to be exiting the engine shutdown coasting mode, the anti-towing conditions are determined based on the obtained operating status information of the target vehicle. If the anti-towing conditions are determined to be met, the engine, transmission auxiliary gearbox, and clutch are controlled to cause the target vehicle to exit the coasting state with the engine off. If it is determined that the anti-towing condition is not met, the starter motor is controlled to cause the target vehicle to exit the coasting state with the engine off.

2. The control method of AMT after vehicle engine shutdown and coasting as described in claim 1, characterized in that, The step of determining whether the anti-towing conditions are met based on the obtained operating status information of the target vehicle includes: The system acquires the gear information of the target vehicle before it exits the coasting mode, the gear information of the target vehicle after it exits the coasting mode, the current vehicle speed, the vehicle load, the current accelerator pedal opening, the status of the transmission and clutch, and the air supply pressure. If the gear information before the vehicle exits the coasting mode and the gear information after exiting the coasting mode belong to the same shift sequence, the current vehicle speed is greater than the first preset vehicle speed, the vehicle load is greater than the first preset load threshold, the current accelerator pedal opening is less than the preset opening threshold, the gearbox and clutch are in a safe state, and the air supply pressure is greater than the pressure threshold, then the anti-towing condition is determined to be met.

3. The AMT control method after vehicle engine shutdown and coasting as described in claim 1, characterized in that, The control of the engine, transmission auxiliary gear, and clutch to cause the target vehicle to exit the coasting state with the engine off includes: Controls the interruption of power connection between the engine and the clutch; Control the gear shift of the auxiliary gearbox and synchronize the speeds at both ends; Control the clutch to engage slowly, transmitting power from the output shaft to the engine; When the engine speed reaches the target speed, a reverse drag signal is sent to the engine control unit to restart the engine, so that the target vehicle can exit the coasting state with the engine off.

4. The AMT control method after vehicle engine shutdown and coasting as described in claim 1, characterized in that, Controlling the starter motor to remove the target vehicle from the coasting state with the engine off includes: By receiving the starter motor start command, the starter motor is controlled to operate; When it is detected that the motor of the starter motor is working and the engine speed reaches the target speed, the target vehicle is taken out of the coasting state with the engine off.

5. The AMT control method after vehicle engine shutdown and coasting as described in claim 3, characterized in that, After the control clutch slowly engages and transmits power from the output shaft to the engine, it also includes: If the engine speed is not detected to reach the target speed point within the first preset time period, the starter motor is controlled to cause the target vehicle to exit the coasting state with the engine off.

6. The AMT control method after vehicle engine shutdown and coasting as described in claim 1, characterized in that, After controlling the starter motor, the following is also included: If the engine speed is not detected to reach the target speed point within the second preset time period, the engine, transmission auxiliary gear and clutch are controlled to make the target vehicle exit the coasting state with the engine off.

7. The AMT control method after vehicle engine shutdown and coasting as described in claim 1, characterized in that, After determining the shutdown mode of the exit shutdown command, the process further includes: If it is determined that the engine shutdown mode is to exit coasting without exiting neutral mode, then the starter motor is controlled to cause the target vehicle to exit the coasting state.

8. A control device for an AMT (Automated Manual Transmission) after a vehicle has been turned off and is coasting, characterized in that, The AMT control device after the vehicle is turned off and coasting includes: The receiving and determining module is used to receive an exit shutdown command when it is determined that the target vehicle does not meet the conditions for coasting with the engine off, and to determine the shutdown mode of the exit shutdown command. The determination module is used to determine whether the anti-towing condition is met based on the obtained operating status information of the target vehicle when the engine shutdown mode is determined to be exiting the engine shutdown coasting mode. The first control module is used to control the engine, the gearbox auxiliary gear and the clutch if it is determined that the anti-towing condition is met, so as to make the target vehicle exit the coasting state with the engine off. The second control module is used to control the starter motor if it is determined that the anti-towing condition is not met, so as to cause the target vehicle to exit the coasting state with the engine off.

9. A control device for an AMT (Automated Manual Transmission) after a vehicle has been turned off and is coasting, characterized in that, The control device for the AMT after vehicle engine shutdown and coasting includes a processor, a memory, and a control program for the AMT after vehicle engine shutdown and coasting stored in the memory and executable by the processor, wherein when the control program for the AMT after vehicle engine shutdown and coasting is executed by the processor, the steps of the control method for the AMT after vehicle engine shutdown and coasting as described in any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a control program for the AMT (Automated Manual Transmission) after the vehicle is turned off and coasting, wherein when the control program for the AMT after the vehicle is turned off and coasting is executed by a processor, the steps of the control method for the AMT after the vehicle is turned off and coasting as described in any one of claims 1 to 7 are implemented.

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