Transmission power-on and power-off control method, device, equipment and readable storage medium

Abstract

A transmission power-on and power-off control method, device, equipment, and readable storage medium. The transmission power-on and power-off control method includes: when a vehicle transmission detects a motor or transmission fault during power-on, if the transmission power-on duration is less than a first preset duration, and the fault does not disappear after the fault occurs for a second preset duration, then the fault is reported; when the vehicle transmission detects a communication fault between the transmission controller and the motor controller during power-off, if the last acquired motor speed is higher than a preset speed, then the current motor speed is estimated based on the last acquired motor speed and a preset decrease rate; if the current motor speed is lower than the preset speed, and the current vehicle speed is lower than the preset speed, and the motor has completed active discharge, then after receiving a sleep signal for a third preset duration, the transmission controller executes the power-off process. Through this application, the experience during vehicle power-on and the safety during vehicle power-off can be improved.

Description

Technical Field

[0001] The present application relates to the field of transmission control technology, and in particular to a transmission power-on and power-off control method, device, equipment, and readable storage medium. Background Art

[0002] Currently, the powertrain of a pure electric commercial vehicle consists of components such as a high-voltage battery, a vehicle controller, a transmission system, and a motor system. Each system has its own power-on and power-off control strategy, with the vehicle controller responsible for overall control and confirmation of the power-on and power-off processes for each system. The vehicle controller and transmission controller typically form a Controller Area Network (CAN) bus for the vehicle's powertrain. The transmission controller and motor controller form independent CAN subnets, and these communicate with each other through CAN to complete the vehicle's power-on and power-off processes.

[0003] However, current transmission power-on and power-off processes suffer from issues such as poor user experience and insufficient safety. For example, due to varying electrical architectures and vehicle configurations, existing transmission controllers are prone to false fault reports during power-on, disrupting the vehicle's normal power-on process and resulting in a poor power-on experience. Furthermore, during power-off, communication failures are handled poorly or inadequately, resulting in insufficient safety during power-off. Summary of the Invention

[0004] The present application provides a transmission power on and off control method, device, equipment and readable storage medium, aiming to solve the technical problems of poor experience and low safety in the current transmission power on and off process.

[0005] In a first aspect, an embodiment of the present application provides a method for controlling power on and off of a transmission, the method comprising:

[0006] When the vehicle transmission detects a motor or transmission fault during power-on, if the transmission power-on duration is less than a first preset duration and the fault does not disappear after a second preset duration, the fault is reported;

[0007] When the vehicle transmission detects a communication failure between the transmission controller and the motor controller during power-off, if the last acquired motor speed is higher than the preset speed, the current motor speed is estimated based on the last acquired motor speed and the preset deceleration rate;

[0008] If the current motor speed is lower than the preset speed, the current vehicle speed is lower than the preset speed, and the motor has completed active discharge, the transmission controller executes the power-off process after receiving the sleep signal for the third preset time.

[0009] Optionally, the transmission power on and off control method further includes:

[0010] When the vehicle transmission detects a communication failure between the transmission controller and the motor controller during power-on, if the vehicle is in a parked charging state, the communication failure between the transmission controller and the motor controller is shielded.

[0011] Optionally, the gearbox power-on process includes:

[0012] When the transmission controller detects the ON gear wake-up signal, the transmission controller wakes up and performs initialization;

[0013] Monitoring the interval between the transmission controller receiving communication messages from the vehicle controller, the motor controller, and the handle controller; reporting a communication fault if the interval exceeds a fourth preset time, or if no communication message is received within a preset message period;

[0014] Check whether the gearbox is in neutral;

[0015] If the gearbox is in neutral, the gearbox controller sends a high-voltage permission instruction to the vehicle controller, and the gearbox is powered on.

[0016] If the transmission gear is not in neutral, the transmission controller sends a command to the shift mechanism to switch to neutral. After the command is executed, if switching to neutral is unsuccessful, the transmission controller reports a shift mechanism stuck fault.

[0017] Optionally, after the instruction is executed, if the shift to neutral gear fails, the transmission controller reports a shift mechanism stuck fault, including:

[0018] The transmission controller sends a high-voltage permission instruction to the vehicle controller;

[0019] After the vehicle is high-pressure, the transmission controller does not respond to the torque request of the accelerator pedal. The transmission controller requests the motor controller to output a preset jitter torque. After the fifth preset time, the transmission controller again sends a command to the shift mechanism to shift to neutral.

[0020] After the command is executed, if the shift to neutral is successful, the shift mechanism stuck fault is eliminated, the transmission controller is allowed to respond to the torque request of the accelerator pedal, and the transmission power-on is completed.

[0021] Optionally, the gearbox power-off process includes:

[0022] When the transmission controller detects that the ON gear signal is lost, the communication between the transmission controller, the vehicle controller and the motor controller is checked.

[0023] Optionally, the transmission power on and off control method further includes:

[0024] When the vehicle transmission detects that the communication between the transmission controller, the vehicle controller and the motor controller is normal during the power-off process, if the current motor speed is lower than the preset speed, and the current vehicle speed is lower than the preset speed, and the motor has completed active discharge, then after receiving the sleep signal for the third preset time, the transmission controller executes the power-off process.

[0025] Optionally, the transmission power on and off control method further includes:

[0026] When the vehicle transmission detects a communication failure between the transmission controller and the vehicle controller during power-off, and the communication between the transmission controller and the motor controller is normal, the transmission controller sends an active discharge instruction to the motor controller;

[0027] If the current motor speed is lower than the preset speed, the current vehicle speed is lower than the preset speed, and the motor has completed active discharge, the transmission controller executes the power-off process after receiving the sleep signal for the third preset time.

[0028] In a second aspect, an embodiment of the present application provides a transmission power on / off control device, the transmission power on / off control device comprising:

[0029] A power-on module, configured to report a fault when a motor or gearbox fault is detected during the power-on process of the vehicle gearbox, if the gearbox power-on duration is less than a first preset duration and the fault does not disappear after a second preset duration;

[0030] an estimation module for, when a communication failure between a transmission controller and a motor controller is detected during a power-off process of a vehicle transmission, estimating a current motor speed based on the last acquired motor speed and a preset descent rate if the last acquired motor speed is higher than a preset speed;

[0031] The power-off module is used to execute the power-off process by the transmission controller after receiving the sleep signal for the third preset time if the current motor speed is lower than the preset speed, the current vehicle speed is lower than the preset speed, and the motor has completed active discharge.

[0032] In a third aspect, an embodiment of the present application provides a transmission power on and off control device, which includes a processor, a memory, and a transmission power on and off control program stored in the memory and executable by the processor. When the transmission power on and off control program is executed by the processor, the steps of the transmission power on and off control method described above are implemented.

[0033] In a fourth aspect, an embodiment of the present application provides a readable storage medium, on which a transmission power on and off control program is stored. When the transmission power on and off control program is executed by a processor, the steps of the transmission power on and off control method described above are implemented.

[0034] The beneficial effects of the technical solutions provided in the embodiments of the present application include:

[0035] In an embodiment of the present application, when a vehicle transmission detects a motor or transmission fault during power-up, if the transmission power-up duration is less than a first preset duration and the fault persists after a second preset duration, the fault is reported. When a vehicle transmission detects a communication failure between the transmission controller and the motor controller during power-down, if the last acquired motor speed is higher than a preset speed, the current motor speed is estimated based on the last acquired motor speed and a preset deceleration rate. If the current motor speed is lower than the preset speed, the current vehicle speed is lower than the preset speed, and the motor has completed active discharge, the transmission controller executes a power-down process after receiving a sleep signal for a third preset duration. By delaying the reporting of motor or transmission faults during power-up, the transmission controller can avoid falsely reporting unnecessary faults due to a short period of time without receiving communication messages, thereby improving the user experience during vehicle power-up. During power-down, in the event of a communication failure between the transmission controller and the motor controller, the transmission controller delays power-down to avoid powering down while the motor speed is still high, thereby improving safety during power-down. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a flow chart of an embodiment of a method for controlling power on and off of a transmission according to the present application;

[0037] Figure 2 This is a schematic diagram of the power-on process of an embodiment of the transmission power-on and power-off control method of the present application;

[0038] Figure 3 This is another power-on process diagram of an embodiment of the transmission power-on and power-off control method of the present application;

[0039] Figure 4 This is a functional module diagram of an embodiment of the transmission power-on and power-off control device of the present application;

[0040] Figure 5 This is a schematic diagram of the hardware structure of the gearbox up and down electrical control device involved in the embodiment of this application. DETAILED DESCRIPTION

[0041] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 this application.

[0042] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0043] In a first aspect, an embodiment of the present application provides a method for controlling power on and off of a transmission.

[0044] In one embodiment, referring to Figure 1 , Figure 1 This is a flow chart of an embodiment of the transmission power-on and power-off control method of the present application. Figure 1 As shown, the transmission power-on and power-off control method includes:

[0045] Step S10: When the vehicle transmission detects a motor or transmission fault during power-on, if the transmission power-on time is less than a first preset time and the fault does not disappear after a second preset time, the fault is reported.

[0046] In this embodiment, during the vehicle transmission power-up process, various motor or transmission faults may be detected. However, some faults are false alarms caused by the transmission controller not receiving communication messages within a short period of time. Therefore, by setting the transmission power-up duration to be less than a first preset duration, such as 2 seconds, and the fault not disappearing after a second preset duration (the second preset duration can be set according to specific needs), various motor or transmission faults detected during the transmission power-up process are reported with a short delay. If the fault disappears after the second preset duration, it is considered a false alarm. If the fault does not disappear after the second preset duration, it is considered not a false alarm and the fault is reported. This prevents the transmission controller from falsely reporting unnecessary faults due to a short period of time without receiving communication messages, thereby improving the user experience during the vehicle power-up process. At the same time, real and serious faults are still reported after a short delay, thereby ensuring safety during the vehicle power-up process.

[0047] In step S20, when the vehicle transmission detects a communication failure between the transmission controller and the motor controller during power-off, if the last motor speed obtained is higher than the preset speed, the current motor speed is estimated based on the last motor speed obtained and the preset deceleration rate.

[0048] In this embodiment, if a communication failure is detected between the transmission controller and the motor controller during the power-off process of the vehicle transmission, the transmission controller will not receive the relevant status information about the motor sent by the motor controller, and will not be able to know the current motor speed. At this time, the current motor speed may still be relatively high. If the transmission controller rashly executes the power-off process, safety problems may arise. By estimating the current motor speed based on the last acquired motor speed and a preset descent rate, determining whether to execute the power-off process based on the estimated current motor speed, the vehicle safety is ensured when the transmission controller executes the power-off process.

[0049] In step S30 , if the current motor speed is lower than the preset speed, the current vehicle speed is lower than the preset speed, and the motor has completed active discharge, the transmission controller executes the power-off process after receiving the sleep signal for the third preset time.

[0050] In this embodiment, if the current motor speed is lower than a preset speed, such as 50 RPM (Revolutions Per Minute), and the current vehicle speed is lower than a preset speed, such as 2 km / h (kilometers per hour), and the motor has completed active discharge, that is, the prerequisites for safe power-off of the transmission are met, after receiving the sleep signal for a third preset time, if it is detected that the ON gear signal is lost, that is, the voltage of the ON gear is less than 9 volts, after 120-160 milliseconds, the transmission controller executes the power-off process, and the transmission controller enters the sleep state after storing the relevant status data.

[0051] In this embodiment, during the power-on process of the vehicle transmission, various motor or transmission faults may be detected. However, some faults are false alarm faults caused by the transmission controller not receiving the communication message in a short period of time. Therefore, by setting the power-on time of the transmission to be less than the first preset time, the first preset time is, for example, 2 seconds, and the fault does not disappear after the fault occurs for the second preset time, the second preset time can be set according to specific needs, that is, during the power-on process of the transmission, various motor or transmission faults detected are reported with a short delay, thereby avoiding the transmission controller from falsely reporting unnecessary faults due to not receiving the communication message in a short period of time, which can improve the experience during the vehicle power-on process. At the same time, real and serious faults will still be reported after a short delay, which can ensure the safety of the vehicle power-on process. During the power-off process of the vehicle transmission, if a communication failure is detected between the transmission controller and the motor controller, then The transmission controller will not receive the relevant status information about the motor sent by the motor controller, and will not be able to know the current motor speed. At this time, the current motor speed may still be high. If the transmission controller rashly executes the power-off process, it may cause safety problems. The current motor speed is estimated based on the last acquired motor speed and the preset decrease rate, and the power-off process is determined based on the estimated current motor speed to ensure the vehicle safety when the transmission controller executes the power-off. If the current motor speed is lower than the preset speed, and the current vehicle speed is less than the preset speed, and the motor has completed active discharge, that is, the prerequisites for safe power-off of the transmission are met, after receiving the sleep signal for the third preset time, the transmission controller executes the power-off process. In response to the communication failure between the transmission controller and the motor controller, the transmission is delayed to avoid powering off when the motor speed is still high, thereby improving the safety of the vehicle during power-off.

[0052] Furthermore, in one embodiment, the transmission power on and off control method further includes:

[0053] When the vehicle transmission detects a communication failure between the transmission controller and the motor controller during power-on, if the vehicle is in a parked charging state, the communication failure between the transmission controller and the motor controller is shielded.

[0054] In this embodiment, when the vehicle is powered on while charging, the motor controller often enters a dormant state, which makes it easy for the vehicle transmission to detect a communication failure between the transmission controller and the motor controller during the power-on process. However, the communication failure between the transmission controller and the motor controller does not have a substantial impact on the power-on process and charging status of the vehicle transmission. If the communication failure between the transmission controller and the motor controller is displayed on the instrument, it may cause trouble to the user. Therefore, in this case, shielding the communication failure between the transmission controller and the motor controller can improve the power-on experience of the vehicle during charging.

[0055] Furthermore, in one embodiment, referring to Figure 2 , Figure 2 This is a schematic diagram of the power-on process of an embodiment of the gearbox power-on and power-off control method of this application. Figure 2 As shown, the gearbox power-on process includes:

[0056] Step S01: When the transmission controller detects an ON gear wake-up signal, the transmission controller wakes up and performs initialization;

[0057] Step S02: monitoring the interval between the transmission controller receiving communication messages from the vehicle controller, the motor controller, and the handle controller; if the interval exceeds a fourth preset time, or if no communication message is received within a preset message period, reporting a communication fault;

[0058] Step S03, detecting whether the gearbox is in neutral;

[0059] Step S04: If the gearbox is in neutral, the gearbox controller sends a high voltage permission instruction to the vehicle controller, and the gearbox is powered on.

[0060] Step S05: If the transmission gear is not in neutral, the transmission controller sends a command to the shift mechanism to switch to neutral. After the command is executed, if the shift to neutral is unsuccessful, the transmission controller reports a shift mechanism stuck fault.

[0061] In this embodiment, when the vehicle is stationary, the low-voltage switch is turned on, and the main switch of the low-voltage battery mechanical power supply is closed to supply 24 volts of low voltage electricity. At this time, the transmission controller is still in a dormant state. When the vehicle is started through the START gear or the ON gear, the transmission controller begins to enter the power-on wake-up process. The transmission controller starts to wake up when it detects that the hard-wired ON gear signal voltage is ≥10.5 volts. After waking up, the transmission controller performs initialization, reads the stored relevant status data, etc. After waking up, the transmission controller starts to send communication messages within 200 milliseconds, and monitors the interval between the transmission controller receiving communication messages from the vehicle controller, motor controller and handle controller. If the interval exceeds 2 seconds, or no communication message is received for more than 50 message cycles, a communication fault is reported. After waking up, the transmission controller also detects whether the gear signal is in neutral. If the transmission gear is in neutral, the transmission controller sends a high-voltage permission instruction to the vehicle controller, and the transmission is powered on. If the transmission gear is not in neutral, the transmission controller sends a switch-to-neutral instruction to the shift mechanism. After the instruction is executed, if the switch to neutral is unsuccessful, the transmission controller reports a shift mechanism stuck fault. It can be understood that after the instruction is executed, if the switch to neutral is successful, the transmission controller sends a high-voltage permission instruction to the vehicle controller, and the transmission is powered on.

[0062] Furthermore, in one embodiment, referring to Figure 3 , Figure 3 This is another power-on flow chart of an embodiment of the transmission power-on and power-off control method of the present application. Figure 3 As shown, after the instruction is executed, if the shift to neutral gear fails, the transmission controller reports a shift mechanism stuck fault, including:

[0063] Step S06: The transmission controller sends a high-voltage permission instruction to the vehicle controller;

[0064] Step S07: After the vehicle is high-pressure, the transmission controller does not respond to the torque request of the accelerator pedal. The transmission controller requests the motor controller to output a preset jitter torque. After a fifth preset time, the transmission controller again sends a command to the shift mechanism to shift to neutral.

[0065] Step S08: After the instruction is executed, if the shift to neutral is successful, the gear shift mechanism stuck fault is eliminated, the transmission controller allows the response to the torque request of the accelerator pedal, and the transmission is powered on.

[0066] In this embodiment, if the shift to neutral is unsuccessful, the vehicle is currently generally prohibited from applying high pressure when it is not in neutral. In this case, the present application sends a high pressure permission instruction to the vehicle controller through the transmission controller. After the vehicle applies high pressure, the transmission controller does not respond to the torque request of the accelerator pedal, so that no safety hazard occurs. However, the transmission controller can request the motor controller to output a preset jitter torque of the motor. Specifically, the motor is first requested to output 20 Nm of torque for 50 milliseconds, and then the motor is requested to output -20 Nm of torque for 50 milliseconds, and repeated 3 times. Then the transmission controller sends a switch to neutral instruction to the shift mechanism again, so that the shift mechanism stuck fault can be easily eliminated. After the instruction is executed, if the shift to neutral is successful, the shift mechanism stuck fault is eliminated, the transmission controller allows the response to the torque request of the accelerator pedal, and the transmission is powered on, which can better solve the problem of the vehicle being unable to apply high pressure when it is not in neutral and the shift mechanism being stuck.

[0067] Furthermore, in one embodiment, the gearbox power-off process includes:

[0068] When the transmission controller detects that the ON gear signal is lost, the communication between the transmission controller, the vehicle controller and the motor controller is checked.

[0069] In this embodiment, specifically, when the transmission controller detects that the voltage of the ON gear is less than 9 volts, the communication between the transmission controller, the vehicle controller and the motor controller is detected to determine whether the communication between the transmission controller, the vehicle controller and the motor controller is normal.

[0070] Furthermore, in one embodiment, the transmission power on and off control method further includes:

[0071] When the vehicle transmission detects that the communication between the transmission controller, the vehicle controller and the motor controller is normal during the power-off process, if the current motor speed is lower than the preset speed, and the current vehicle speed is lower than the preset speed, and the motor has completed active discharge, then after receiving the sleep signal for the third preset time, the transmission controller executes the power-off process.

[0072] In this embodiment, when the vehicle transmission detects that the communication between the transmission controller, the vehicle controller and the motor controller is normal during the power-off process, the normal transmission power-off process is executed. When all the prerequisites for safe power-off of the transmission are met, the transmission controller executes the power-off process after receiving the sleep signal for the third preset time.

[0073] Furthermore, in one embodiment, the transmission power on and off control method further includes:

[0074] When the vehicle transmission detects a communication failure between the transmission controller and the vehicle controller during power-off, and the communication between the transmission controller and the motor controller is normal, the transmission controller sends an active discharge instruction to the motor controller;

[0075] If the current motor speed is lower than the preset speed, the current vehicle speed is lower than the preset speed, and the motor has completed active discharge, the transmission controller executes the power-off process after receiving the sleep signal for the third preset time.

[0076] In this embodiment, the transmission controller usually sends an active discharge instruction to the motor controller, which is an action executed by the transmission controller after receiving the active discharge instruction from the vehicle controller. That is, the transmission controller needs to be controlled by the vehicle controller and has no right to actively send an active discharge instruction to the motor controller. However, when the vehicle transmission detects a communication failure between the transmission controller and the vehicle controller during the power-off process, and the communication between the transmission controller and the motor controller is normal, the transmission controller cannot receive the active discharge instruction from the vehicle controller. Usually in this case, the motor will perform passive discharge, but the passive discharge time is slow, usually taking 2-3 minutes. If a person accidentally comes into contact with high voltage electricity during this process, a safety hazard will arise. In this case, the present application uses the transmission controller to overstep its authority and actively send an active discharge instruction to the motor controller. The active discharge speed is very fast, usually within 3 seconds, which can greatly reduce the probability of people accidentally coming into contact with high voltage electricity and improve the safety of the vehicle during the power-off process.

[0077] In a second aspect, an embodiment of the present application also provides a transmission power control device.

[0078] In one embodiment, referring to Figure 4 , Figure 4 This is a functional module diagram of an embodiment of the transmission power control device of the present application, as shown in FIG. Figure 4 As shown, the transmission power control device includes:

[0079] The power-on module 10 is configured to report a fault when a motor or gearbox fault is detected during the power-on process of the vehicle gearbox, if the gearbox power-on duration is less than a first preset duration and the fault does not disappear after a second preset duration occurs;

[0080] an estimating module 20 for, when a communication failure between a transmission controller and a motor controller is detected during a power-off process of a vehicle transmission, estimating a current motor speed based on the last acquired motor speed and a preset deceleration rate if the last acquired motor speed is higher than a preset speed;

[0081] The power-off module 30 is used to execute the power-off process by the transmission controller after receiving the sleep signal for a third preset time if the current motor speed is lower than the preset speed, the current vehicle speed is lower than the preset speed, and the motor has completed active discharge.

[0082] Furthermore, in one embodiment, the transmission power on and off control device further includes a power on fault shielding module for:

[0083] When the vehicle transmission detects a communication failure between the transmission controller and the motor controller during power-on, if the vehicle is in a parked charging state, the communication failure between the transmission controller and the motor controller is shielded.

[0084] Furthermore, in one embodiment, the gearbox power-on process includes:

[0085] When the transmission controller detects the ON gear wake-up signal, the transmission controller wakes up and performs initialization;

[0086] Monitoring the interval between the transmission controller receiving communication messages from the vehicle controller, the motor controller, and the handle controller; reporting a communication fault if the interval exceeds a fourth preset time, or if no communication message is received within a preset message period;

[0087] Check whether the gearbox is in neutral;

[0088] If the gearbox is in neutral, the gearbox controller sends a high-voltage permission instruction to the vehicle controller, and the gearbox is powered on.

[0089] If the transmission gear is not in neutral, the transmission controller sends a command to the shift mechanism to switch to neutral. After the command is executed, if switching to neutral is unsuccessful, the transmission controller reports a shift mechanism stuck fault.

[0090] Furthermore, in one embodiment, the transmission power up and down control device further includes an upper high voltage switching neutral module, which is used to:

[0091] The transmission controller sends a high-voltage permission instruction to the vehicle controller;

[0092] After the vehicle is high-pressure, the transmission controller does not respond to the torque request of the accelerator pedal. The transmission controller requests the motor controller to output a preset jitter torque. After the fifth preset time, the transmission controller again sends a command to the shift mechanism to shift to neutral.

[0093] After the command is executed, if the shift to neutral is successful, the shift mechanism stuck fault is eliminated, the transmission controller is allowed to respond to the torque request of the accelerator pedal, and the transmission power-on is completed.

[0094] Furthermore, in one embodiment, the gearbox power-off process includes:

[0095] When the transmission controller detects that the ON gear signal is lost, the communication between the transmission controller, the vehicle controller and the motor controller is checked.

[0096] Furthermore, in one embodiment, the transmission power on and off control device further includes a normal power off module, which is used to:

[0097] When the vehicle transmission detects that the communication between the transmission controller, the vehicle controller and the motor controller is normal during the power-off process, if the current motor speed is lower than the preset speed, and the current vehicle speed is lower than the preset speed, and the motor has completed active discharge, then after receiving the sleep signal for the third preset time, the transmission controller executes the power-off process.

[0098] Furthermore, in one embodiment, the transmission power on / off control device further includes an overriding active discharge module for:

[0099] When the vehicle transmission detects a communication failure between the transmission controller and the vehicle controller during power-off, and the communication between the transmission controller and the motor controller is normal, the transmission controller sends an active discharge instruction to the motor controller;

[0100] If the current motor speed is lower than the preset speed, the current vehicle speed is lower than the preset speed, and the motor has completed active discharge, the transmission controller executes the power-off process after receiving the sleep signal for the third preset time.

[0101] Among them, the functional implementation of each module in the above-mentioned transmission power on and off control device corresponds to the various steps in the above-mentioned transmission power on and off control method embodiment, and its functions and implementation processes are no longer repeated here.

[0102] In a third aspect, an embodiment of the present application provides a transmission power control device.

[0103] Reference Figure 5 , Figure 5 Schematic diagram of the hardware structure of the transmission power on / off control device involved in the embodiment of the present application. In the embodiment of the present application, the transmission power on / off control device may include a processor, a memory, a communication interface and a communication bus.

[0104] The communication bus may be of any type and is used to interconnect the processor, memory, and communication interface.

[0105] Communication interfaces include input / output (I / O) interfaces, physical interfaces, and logical interfaces. These interfaces interconnect components within the transmission power control device, as well as interfaces that connect the transmission power control device to other devices (such as other computing devices or user devices). Physical interfaces can include Ethernet, fiber optic, and ATM interfaces; user devices can include displays and keyboards.

[0106] The 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.

[0107] The processor may be a general-purpose processor that can call a transmission power-on / off control program stored in a memory and execute the transmission power-on / off control method provided in the embodiments of the present application. For example, the general-purpose processor may be a central processing unit (CPU). The method executed when the transmission power-on / off control program is called can be referenced to the various embodiments of the transmission power-on / off control method of the present application and will not be further described here.

[0108] Those skilled in the art will understand that Figure 5 The hardware structure shown in the figure does not constitute a limitation to the present application and may include more or fewer components than shown in the figure, or a combination of certain components, or a different arrangement of components.

[0109] In a fourth aspect, an embodiment of the present application also provides a readable storage medium.

[0110] The readable storage medium of the present application stores a transmission power on and off control program, wherein when the transmission power on and off control program is executed by the processor, the steps of the transmission power on and off control method as described above are implemented.

[0111] Among them, the method implemented when the transmission power on and off control program is executed can refer to the various embodiments of the transmission power on and off control method of this application, and will not be repeated here.

[0112] It should be noted that the serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0113] The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices. The terms "first", "second" and "third" are used to distinguish different objects, etc., and do not represent a sequence, nor do they limit the "first", "second" and "third" to different types.

[0114] In the description of the embodiments of this application, the words "exemplary," "for example," or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary," "for example," or "for example" in the embodiments of this application should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary," "for example," or "for example" is intended to present the relevant concepts in a concrete manner.

[0115] In the description of the embodiments of the present application, unless otherwise specified, “ / ” means or, for example, A / B can mean A or B; “and / or” in the text is merely a description of the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, “multiple” refers to two or more than two.

[0116] In some processes described in the embodiments of the present application, multiple operations or steps are included that appear in a specific order. However, it should be understood that these operations or steps may not be performed in the order in which they appear in the embodiments of the present application or may be performed in parallel. The sequence numbers of the operations are only used to distinguish between different operations, and the sequence numbers themselves do not represent any order of execution. In addition, these processes may include more or fewer operations, and these operations or steps may be performed in sequence or in parallel, and these operations or steps may be combined.

[0117] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus the necessary general hardware platform, of course, it 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 the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes a number of instructions for enabling a terminal device to execute the methods described in each embodiment of the present application.

[0118] The above are only preferred embodiments of the present application and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A method for controlling power on and off of a gearbox, characterized in that: The transmission power on and off control method includes: When the vehicle transmission detects a motor or transmission fault during power-on, if the transmission power-on duration is less than a first preset duration and the fault does not disappear after a second preset duration, the fault is reported; When the vehicle transmission detects a communication failure between the transmission controller and the motor controller during power-off, if the last acquired motor speed is higher than the preset speed, the current motor speed is estimated based on the last acquired motor speed and the preset deceleration rate; If the current motor speed is lower than the preset speed, the current vehicle speed is lower than the preset speed, and the motor has completed active discharge, the transmission controller executes the power-off process after receiving the sleep signal for the third preset time.

2. The transmission power-on and power-off control method according to claim 1, characterized in that: The transmission power on and off control method further includes: When the vehicle transmission detects a communication failure between the transmission controller and the motor controller during power-on, if the vehicle is in a parked charging state, the communication failure between the transmission controller and the motor controller is shielded.

3. The transmission power-on and power-off control method according to claim 1, characterized in that: The gearbox power-on process includes: When the transmission controller detects the ON gear wake-up signal, the transmission controller wakes up and performs initialization; Monitoring the interval between the transmission controller receiving communication messages from the vehicle controller, the motor controller, and the handle controller; reporting a communication fault if the interval exceeds a fourth preset time, or if no communication message is received within a preset message period; Check whether the gearbox is in neutral; If the gearbox is in neutral, the gearbox controller sends a high-voltage permission instruction to the vehicle controller, and the gearbox is powered on. If the transmission gear is not in neutral, the transmission controller sends a command to the shift mechanism to switch to neutral. After the command is executed, if switching to neutral is unsuccessful, the transmission controller reports a shift mechanism stuck fault.

4. The transmission power-on and power-off control method according to claim 3, characterized in that: After the instruction is executed, if the shift to neutral gear fails, the transmission controller reports a shift mechanism stuck fault, including: The transmission controller sends a high-voltage permission instruction to the vehicle controller; After the vehicle is high-pressure, the transmission controller does not respond to the torque request of the accelerator pedal. The transmission controller requests the motor controller to output a preset jitter torque. After the fifth preset time, the transmission controller again sends a command to the shift mechanism to shift to neutral. After the command is executed, if the shift to neutral is successful, the shift mechanism stuck fault is eliminated, the transmission controller is allowed to respond to the torque request of the accelerator pedal, and the transmission power-on is completed.

5. The transmission power-on and power-off control method according to claim 1, characterized in that: The gearbox power-off process includes: When the transmission controller detects that the ON gear signal is lost, the communication between the transmission controller, the vehicle controller and the motor controller is checked.

6. The transmission power-on and power-off control method according to claim 1, characterized in that: The transmission power on and off control method further includes: When the vehicle transmission detects that the communication between the transmission controller, the vehicle controller and the motor controller is normal during the power-off process, if the current motor speed is lower than the preset speed, and the current vehicle speed is lower than the preset speed, and the motor has completed active discharge, then after receiving the sleep signal for the third preset time, the transmission controller executes the power-off process.

7. The transmission power-on and power-off control method according to claim 1, characterized in that: The transmission power on and off control method further includes: When the vehicle transmission detects a communication failure between the transmission controller and the vehicle controller during power-off, and the communication between the transmission controller and the motor controller is normal, the transmission controller sends an active discharge instruction to the motor controller; If the current motor speed is lower than the preset speed, the current vehicle speed is lower than the preset speed, and the motor has completed active discharge, the transmission controller executes the power-off process after receiving the sleep signal for the third preset time.

8. A gearbox power control device, characterized in that: The gearbox power on and off control device includes: A power-on module, configured to report a fault when a motor or gearbox fault is detected during the power-on process of the vehicle gearbox, if the gearbox power-on duration is less than a first preset duration and the fault does not disappear after a second preset duration; an estimation module for, when a communication failure between a transmission controller and a motor controller is detected during a power-off process of a vehicle transmission, estimating a current motor speed based on the last acquired motor speed and a preset descent rate if the last acquired motor speed is higher than a preset speed; The power-off module is used to execute the power-off process by the transmission controller after receiving the sleep signal for the third preset time if the current motor speed is lower than the preset speed, the current vehicle speed is lower than the preset speed, and the motor has completed active discharge.

9. A gearbox power control device, characterized in that: The transmission power on and off control device includes a processor, a memory, and a transmission power on and off control program stored in the memory and executable by the processor. When the transmission power on and off control program is executed by the processor, the steps of the transmission power on and off control method according to any one of claims 1 to 7 are implemented.

10. A readable storage medium, characterized in that: The readable storage medium stores a transmission power on / off control program, wherein when the transmission power on / off control program is executed by the processor, the steps of the transmission power on / off control method according to any one of claims 1 to 7 are implemented.

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