WO2023131292A1

WO2023131292A1 - Control method and apparatus for transmission of new energy vehicle, vehicle, and storage medium

Info

Publication number: WO2023131292A1
Application number: PCT/CN2023/070988
Authority: WO
Inventors: 张博; 刘帅
Original assignee: 长城汽车股份有限公司
Priority date: 2022-01-07
Filing date: 2023-01-06
Publication date: 2023-07-13
Also published as: CN115111359A; CN115111359B

Abstract

A control method and apparatus for a transmission of a new energy vehicle, a vehicle, and a storage medium. The method comprises: when not detecting transmission gear information from prior to the previous vehicle dormancy, and when gear self-learning fails after not detecting the transmission gear information from prior to the previous vehicle dormancy, obtaining a current logic gear of the vehicle and the current depth of an accelerator pedal being depressed, and receiving a current transmission fault signal and a current transmission controller state signal sent by a transmission controller; and if the current logic gear is a forward gear or a reverse gear, if the current depth of the accelerator pedal being depressed is greater than a preset depth threshold, if the transmission does not have a first preset fault currently, if the transmission controller does not have a second preset fault currently, and if the transmission gear information from prior to the previous vehicle dormancy is still not detected currently, controlling the transmission to perform emergency upshifting. In the control method, when a user has a need to move urgently and the vehicle meets an emergency upshifting condition, the vehicle can move urgently, thereby meeting the user's need to move urgently.

Description

Control method, device, vehicle and storage medium of new energy vehicle gearbox

This patent application claims the priority of Chinese Patent Application No. CN 202210017701.0 filed on January 7, 2022. The disclosure of the prior application is incorporated by reference in its entirety into this application.

technical field

The present application relates to the technical field of new energy vehicles, and in particular to a control method, device, vehicle and storage medium for a gearbox of a new energy vehicle.

Background technique

New energy vehicles usually refer to vehicles that use unconventional vehicle fuels as their power source; or, refer to vehicles that use conventional vehicle fuels but use new on-board power devices. New energy vehicles include hybrid vehicles, pure electric vehicles, fuel cell electric vehicles and other new energy vehicles.

When the new energy vehicle is started, it will release the dormant state, and then detect the gear information of the gearbox before the vehicle is dormant. If the gear information is lost, the vehicle controller will request the gearbox controller to perform gear self-learning. Through gear self-learning, the vehicle controller can learn the gear information of the gearbox. However, some situations can cause the gear self-learning to fail; for example, the gear self-learning timeout, the vehicle moves during the gear self-learning process, and the gearbox internal gear jams during the gear self-learning process. If the gear self-learning fails, the gear information of the gearbox cannot be obtained, resulting in the vehicle being unable to drive.

technical problem

The present application provides a new energy vehicle gearbox control method, device, vehicle and storage medium to solve the problem that the gear information of the gearbox before the vehicle sleeps is lost and the gear self-learning fails, resulting in the vehicle being unable to drive.

technical solution

In a first aspect, the present application provides a method for controlling a gearbox of a new energy vehicle, the method comprising:

After the vehicle sleep state is released, when the transmission gear information before the vehicle sleep is not detected, and the gear self-learning fails after the transmission gear information before the vehicle sleep is not detected, the current logical gear of the vehicle is obtained and the current depth of the accelerator pedal being stepped on, and receive the current transmission fault signal and the current transmission controller status signal sent by the transmission controller of the vehicle;

When the following conditions are met, the transmission is controlled to shift into gear in an emergency: the current logical gear is a forward gear or a reverse gear, the current depth of the accelerator pedal being depressed is greater than the preset depth threshold, and the current gear shift is determined by the current transmission failure signal The gearbox does not have the first preset fault, and the current gearbox controller status signal determines that the current gearbox controller does not have the second preset fault, and the gearbox gear information before the vehicle sleep has not yet been detected.

In a possible implementation, after the vehicle sleep state is released, when the transmission gear information before the vehicle sleep is not detected, and the gear position self-learning fails after the transmission gear information before the vehicle sleep is not detected When , the control method of the new energy vehicle gearbox also includes:

Obtain the current engine state, current vehicle speed and current actual vehicle torque;

When the following conditions are met, the gearbox is controlled to shift gears in an emergency: the current logical gear is a forward gear or a reverse gear, the depth of the current accelerator pedal being depressed is greater than the preset depth threshold, the current gearbox does not have the first preset fault, The current transmission controller does not have the second preset fault, the current transmission gear information before the vehicle sleep has not been detected, the current engine state is in the starting state, the current vehicle speed is not greater than the preset vehicle speed threshold and the current vehicle actual torque is not greater than Preset torque threshold.

In a possible implementation manner, the gearbox is a two-speed gearbox;

Control transmission emergency shift, including:

Control the transmission into 1st or 2nd gear.

In a possible implementation manner, when the transmission is controlled to enter gears in an emergency, it enters the second gear.

In a possible implementation manner, the number of gears of the gearbox is at least three; when the gearbox is controlled to shift gears in an emergency, the highest gear is entered.

In a possible implementation, the method for controlling the gearbox of the new energy vehicle further includes:

During the entire life cycle of the vehicle, record the number of emergency shifts of the gearbox;

When the number of emergency shifts of the gearbox is controlled to be greater than the preset times threshold, the emergency shift of the gearbox is prohibited.

In a possible implementation manner, when the number of times of controlling the gearbox for emergency shifting is greater than a preset times threshold, the current gear information of the gearbox is recorded.

In a possible implementation manner, controlling the gearbox for emergency gear shifting includes:

An emergency shift request is sent to the transmission controller; wherein, the emergency shift request is used to instruct the transmission controller to control the transmission emergency shift.

In a possible implementation manner, when the gearbox controller receives an emergency gear shift request, the gearbox controller controls the power unit to drive the shift fork of the gearbox to move to a preset position.

In a possible implementation manner, the vehicle is a hybrid vehicle, the gearbox is a rear axle gearbox of the hybrid vehicle, and the power unit is a rear axle motor of the hybrid vehicle.

In a possible implementation, when the vehicle is a hybrid vehicle, the gearbox is a rear axle gearbox of the hybrid vehicle, and the gearbox controller is a rear axle gearbox controller of the hybrid vehicle;

When the vehicle is a pure electric vehicle, the gearbox is a gearbox of the pure electric vehicle, and the gearbox controller is a gearbox controller of the pure electric vehicle.

In a second aspect, the present application provides a control device for a gearbox of a new energy vehicle, the control device includes:

The detection module is used to obtain the vehicle gear information when the transmission gear information before the vehicle sleep is not detected after the vehicle sleep state is released, and the gear self-learning fails after the transmission gear information before the vehicle sleep is not detected. The current logical gear and the current depth of the accelerator pedal being stepped on, and receive the current transmission fault signal and the current transmission controller status signal sent by the transmission controller of the vehicle;

The control module is configured to control the transmission to shift gears in an emergency when the following conditions are met: the current logical gear is a forward gear or a reverse gear, the depth at which the current accelerator pedal is depressed is greater than a preset depth threshold, and the current transmission through the current transmission The fault signal determines that the current gearbox does not have the first preset fault, and the current gearbox controller status signal determines that the current gearbox controller does not have the second preset fault, and the gearbox gear information before the vehicle sleep has not yet been detected .

In a possible implementation, the detection module is also used to:

After the vehicle hibernation state is released, when the transmission gear information before the vehicle hibernation is not detected, and the gear self-learning fails after the transmission gear information before the vehicle hibernation is not detected, the current engine status and current vehicle speed are acquired. and the current actual vehicle torque;

Correspondingly, the control module is specifically used for:

In a possible implementation manner, the gearbox is a two-speed gearbox;

The control module is used specifically for:

Control the transmission into 1st or 2nd gear.

In a possible implementation, the control device for the gearbox of the new energy vehicle further includes:

The recording module is used to record the number of emergency gear shifting of the control gearbox during the entire life cycle of the vehicle; when the number of emergency gear shifting of the control gearbox is greater than the preset number of thresholds, the emergency gear shifting of the gearbox is prohibited.

In a possible implementation manner, the control module is specifically used for:

In a third aspect, the present application provides an electronic device, which includes a memory, a processor, and a computer program stored in the memory and operable on the processor, and the processor executes the computer program When implementing the steps of the method for controlling the transmission of a new energy vehicle described in the first aspect or any possible implementation manner of the first aspect.

In a fourth aspect, the present application provides a vehicle, which includes the electronic device as described in the third aspect.

In a fifth aspect, the present application provides a computer-readable storage medium, the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, any one of the above first aspect or the first aspect is implemented. Possible implementations are the steps of the control method for the gearbox of a new energy vehicle.

Beneficial effect

The control method, device, vehicle and storage medium of the new energy vehicle gearbox provided by this application, after the vehicle is released from the dormant state, when the transmission gear information before the vehicle is dormant is not detected, and when the vehicle is not detected before the dormant state When the gear self-learning of the transmission gear information fails, if it is detected that the current logical gear is a forward gear or a reverse gear, and the current accelerator pedal is depressed to a depth greater than the preset depth threshold, it is determined that the user has an emergency travel demand; if If it is detected that the current gearbox does not have the first preset fault, the current gearbox controller does not have the second preset fault, and the gear information of the gearbox before the vehicle sleeps is still not detected, then it is determined that the vehicle meets the emergency shift driving condition ; At this time, the gearbox can be controlled to enter gears in an emergency, so that when the gear information of the gearbox before the vehicle sleeps is lost and the gear self-learning fails, when the user has an emergency travel demand and the vehicle meets the driving conditions for emergency gears , the vehicle can be started in an emergency to meet the user's emergency travel needs.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the accompanying drawings that need to be used in the descriptions of the embodiments or the prior art will be briefly introduced below. Obviously, the accompanying drawings in the following description are only for the present application For some embodiments, those of ordinary skill in the art can also obtain other drawings based on these drawings without paying creative efforts.

Fig. 1 is a flow chart of the implementation of the control method of the new energy vehicle gearbox provided by the embodiment of the present application;

Fig. 2 is a schematic structural diagram of a control device for a new energy vehicle gearbox provided in an embodiment of the present application;

Fig. 3 is a schematic diagram of an electronic device provided in an embodiment of the present application.

Embodiments of the present invention

In the following description, specific details such as specific system structures and technologies are presented for the purpose of illustration rather than limitation, so as to thoroughly understand the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.

In order to make the purpose, technical solution and advantages of the present application clearer, the following will describe with reference to the accompanying drawings and specific implementation methods.

Referring to FIG. 1 , it shows a flow chart of a control method for a new energy vehicle gearbox provided by an embodiment of the present application. The execution body of the method may be an electronic device, and the electronic device may be a vehicle controller of a vehicle. In this embodiment, the method for controlling the gearbox of a new energy vehicle includes two steps, S101 and S102, which are described in detail as follows.

In S101, after the vehicle sleep state is released, when the transmission gear information before the vehicle sleep is not detected, and the gear self-learning fails after the transmission gear information before the vehicle sleep is not detected, obtain the vehicle's The current logical gear and the current depth of the accelerator pedal being depressed, and receive the current transmission fault signal and the current transmission controller status signal sent by the transmission controller of the vehicle.

Before the vehicle sleeps every time, that is, before each engine is turned off, the gearbox will usually switch to the N gear, and the vehicle will save the gear information of the gearbox before the sleep, that is, the gear of the gear lever of the gearbox before the sleep.

When the vehicle restarts, it will release the hibernation state, and then detect the transmission gear information before the vehicle hibernation. If the gearbox gear information before the vehicle sleep is not detected, it is determined that the gearbox gear information is lost, and the current gear of the gearbox is unknown at this time, that is, unknown.

When it is determined that the gearbox gear information is lost, the vehicle controller will request the gearbox controller to perform gear self-learning. Through gear self-learning, the gearbox controller can learn the gear information of the gearbox. However, during the gear self-learning process, if the vehicle moves or the internal gears of the gearbox are stuck, for example, the tooth-to-tooth phenomenon, etc., the gear self-learning will be interrupted. Both the interruption of gear self-learning and the timeout of gear self-learning will be judged as failure of gear self-learning. If the gear self-learning fails, the gear information of the gearbox cannot be learned.

In this case, S101 detects whether the user has a travel demand and whether the vehicle meets the emergency travel conditions; thus, when the user has a travel demand and the vehicle meets the emergency travel conditions, the gearbox shifts into gear in an emergency and the vehicle starts in an emergency , to meet the travel needs of users.

Among them, the logical gear is the gear identified by the vehicle controller according to the current vehicle state and determined according to the identification strategy. The vehicle controller can make a comprehensive judgment based on the obtained target gear, brake pedal status signal, vehicle speed signal, shift lock status signal, etc. to determine the logical gear. The logical gear can be displayed in the instrument panel.

The depth to which the accelerator pedal is currently depressed can be detected by the corresponding sensor.

The gearbox controller can detect whether the gearbox is faulty in real time, generate a gearbox fault signal, and send the gearbox fault signal to the vehicle controller. The vehicle controller can judge whether the gearbox is currently faulty and determine the type of fault according to the current gearbox fault signal.

The gearbox controller can also detect its own state in real time, generate a gearbox controller status signal, and send the gearbox controller status signal to the vehicle controller. The vehicle controller can determine the current state of the transmission controller according to the current state signal of the transmission controller.

In S102, when the following conditions are met, the gearbox is controlled to shift gears urgently: the current logical gear is a forward gear or a reverse gear, the depth of the current accelerator pedal being depressed is greater than the preset depth threshold, and is determined by the current gearbox fault signal The current gearbox does not have the first preset fault, and the current gearbox controller status signal determines that the current gearbox controller does not have the second preset fault, and the gearbox gear information before the vehicle sleep has not yet been detected.

The first preset fault is a higher-level fault among gearbox faults, which can affect the emergency shifting of the gearbox. The first preset fault may include all faults except information faults and warning faults. When the gearbox has the first preset fault, it means that there is a high-level fault in the gearbox, and at this time the gearbox cannot enter gears in an emergency.

Exemplarily, if the current gearbox fault signal is information, warning or no fault, it is determined that the current gearbox does not have the first preset fault; otherwise, it is determined that the current gearbox has the first preset fault. Among them, information is used to indicate information-type faults, such as some information errors, etc., and warning is used to indicate alarm-type faults.

The second preset fault is a higher-level fault among the faults of the gearbox controller, which can also affect the emergency shifting of the gearbox.

Exemplarily, if the current gearbox controller status signal is normal, it is determined that the current gearbox controller is in a normal state, and there is no second preset fault; wherein, normal is used to indicate that the gearbox controller status is normal; when the gearbox When the controller is in normal state, it can control the gearbox to perform emergency gear shifting.

The first preset fault and the second preset fault can be calibrated according to actual needs.

If the current logical gear is a forward gear or a reverse gear, and the current depth of the accelerator pedal being depressed is greater than the preset depth threshold, it means that the current driver has a travel demand and the driver wants the vehicle to be able to drive. Wherein, the preset depth threshold can be calibrated according to actual requirements.

If it is determined by the current gearbox fault signal that the current gearbox does not have the first preset fault, and it is determined by the current gearbox controller status signal that the current gearbox controller does not have the second preset fault, it means that the current gearbox meets the emergency gear shift conditions of.

When the following conditions are met, the transmission can be controlled to enter gears in an emergency: the current logical gear is forward or reverse, the depth of the current accelerator pedal is greater than the preset depth threshold, and the current transmission is determined by the current transmission failure signal The gearbox does not have the first preset fault, and it is determined through the current gearbox controller status signal that the current gearbox controller does not have the second preset fault, and the gearbox gear information before the vehicle sleep has not yet been detected.

If the gearbox gear information before the vehicle sleep can be detected at this time, there is no need to control the gearbox for emergency shifting; at this time, the gear of the gearbox can be controlled according to the normal startup process of the vehicle, so that the vehicle can run normally. When any one of the following conditions is not met, the emergency gear shift request will not be triggered, and the gearbox will not be controlled for emergency gear shifting: the current logical gear is neither a forward gear nor a reverse gear, and the current accelerator pedal is depressed The depth is not greater than the preset depth threshold, and the current gearbox fault signal determines that the current gearbox has a first preset fault, or the current gearbox controller status signal determines that the current gearbox controller has a second preset fault.

In the control method composed of S101 and S102, after the vehicle sleep state is released, when the transmission gear information before the vehicle sleep is not detected, and after the transmission gear information before the vehicle sleep is not detected, the gear self-learning When it fails, if it is detected that the current logical gear is forward gear or reverse gear, and the depth of the current accelerator pedal being depressed is greater than the preset depth threshold, it is determined that the user has an urgent travel demand; if it is detected that the current gearbox does not have the first preset If there is no fault, the current gearbox controller does not have the second preset fault, and the gearbox gear information before the vehicle sleep is still not detected, it is determined that the vehicle meets the driving conditions for emergency shifting; at this time, the gearbox can be controlled for emergency shifting , so that when the gear information of the gearbox before the vehicle sleeps is lost and the gear self-learning fails, when the user has an emergency travel demand and the vehicle meets the emergency driving conditions, the vehicle can be started in an emergency, thereby satisfying the user emergency travel needs.

In a possible implementation, after the vehicle sleep state is released, when the transmission gear information before the vehicle sleep is not detected, and the gear position self-learning fails after the transmission gear information before the vehicle sleep is not detected , the control method of the new energy vehicle gearbox also includes the following steps:

In order to improve driving safety, in addition to considering the factors mentioned in the previous embodiment (that is, the embodiment composed of S101 and S102), this embodiment further considers the current engine state, current the vehicle speed and the current actual torque of the vehicle.

If the current vehicle speed is greater than the preset vehicle speed threshold, or the current actual torque of the vehicle is greater than the preset torque threshold, a safety accident may be caused; therefore, the gearbox will not be controlled for emergency shifting. Wherein, the preset vehicle speed threshold and the preset torque threshold can be obtained through calibration under the premise of considering safety.

When the drive system of a new energy vehicle consists of an engine (generally an internal combustion engine) and a motor, the motor can provide power alone for the vehicle to run after the emergency start. In this embodiment, the engine is limited to be in the starting state, so as to provide another guarantee for the power of the vehicle. When the motor is abnormal and cannot output power, if the engine is in the starting state, it can provide power for the vehicle to ensure that the vehicle can start driving after an emergency start; and, even if the motor is not abnormal, the vehicle power when the engine is started The power of the vehicle is more abundant when it is not started, and the driving of the vehicle is more stable.

In this embodiment, when any one of the following conditions is not satisfied, the emergency shift request will not be triggered, and the emergency shift of the gearbox will not be controlled: the current logical gear is neither a forward gear nor a reverse gear, The current accelerator pedal is depressed to a depth not greater than the preset depth threshold, the current gearbox has the first preset fault, the current gearbox controller has the second preset fault, and the current gearbox gear information before the vehicle sleeps is detected, The current engine state is not started, the current vehicle speed is greater than the preset vehicle speed threshold, or the current actual vehicle torque is greater than the preset torque threshold.

In this embodiment, on the basis of comprehensive consideration of whether the driver has a travel demand and whether the vehicle meets the conditions for emergency gear shifting, the control method is further optimized in consideration of safety and stability.

In a possible implementation, the gearbox is a two-speed gearbox;

Controlling the emergency gear shifting of the gearbox includes the following steps:

Control the gearbox to enter 1st gear or 2nd gear.

In this embodiment, the gearbox is a two-speed gearbox, and its gears include 1st and 2nd gears; at this time, controlling the gearbox to enter gears in an emergency may be to control the gearbox to enter 1st gear or 2nd gear.

In a preferred embodiment of this embodiment, for a two-speed gearbox, controlling the gearbox to enter gears in an emergency includes controlling the gearbox to enter the second gear. For a two-speed gearbox, controlling the gearbox to enter the second gear in an emergency has a greater fault tolerance rate, so it is preferred to enter the second gear.

When the gearbox is a first-gear gearbox, the emergency gear shift of the control gearbox can be used to enter the first gear for the control gearbox. The gearbox can also be other multi-speed gearboxes, which is not specifically limited here. Controlling the gearbox to enter gears in an emergency can be to control the gearbox to enter any gear. In a preferred embodiment, controlling the gearbox for emergency shifting may be controlling the gearbox to enter the highest gear.

In a possible implementation, the method for controlling the gearbox of a new energy vehicle further includes the following steps:

When the transmission is controlled for emergency shifting, the transmission gear information is unknown, that is, the position of the shift fork in the transmission is unknown. In order to ensure the success of the emergency shift, the transmission controller will request a continuous force for a period of time; within this period of time, the motor will always output torque to push the shift fork to the corresponding gear position. This period of time will generally be longer than the actual time required for the shift fork. Exemplarily, assume that the duration of this period is 5 seconds; if the position of the shift fork is very close to the position of the target gear, the shift fork will reach the position of the target gear after 1 second; however, at this time The motor is still delivering torque, pushing the shift fork; this causes wear where the shift fork is in the target gear.

When the number of emergency shifts of the gearbox is controlled too much, it will cause the hard stop point of the gearbox to wear, and may cause hidden dangers in the shifting function of the vehicle. Therefore, in this embodiment, during the entire life cycle of the vehicle, record the number of times the emergency shift of the gearbox is controlled; driver. It can be reminded by lighting the corresponding signal lamp, or by sending information to the driver's mobile phone terminal. Wherein, the preset times threshold can be set according to actual requirements.

In a preferred embodiment of this embodiment, when the number of times the gearbox is controlled to shift in emergency is greater than the preset number threshold, the emergency shift of the gearbox is prohibited, and the gear information of the current gearbox is recorded at the same time. In order to detect the gearbox gear information when starting next time, there is no need to judge whether emergency gear shifting is possible.

In this embodiment, during the entire life cycle of the vehicle, when it is detected that the number of emergency shifts of the gearbox is greater than the preset number threshold, the emergency shift of the gearbox is prohibited, so as to protect the internal components of the gearbox from excessive wear and tear.

In a possible implementation manner, controlling the emergency shifting of the gearbox includes the following steps:

The vehicle controller can instruct the transmission controller to control the transmission for emergency gear shifting by sending an emergency gear shift request to the gearbox controller.

When the gearbox is controlled to enter gears in an emergency, the motor corresponding to the gearbox outputs a certain torque to push the shift fork in the gearbox to move to the desired position.

In this embodiment, the method for controlling the gearbox can be applied to a rear axle gearbox of a hybrid vehicle, and can also be applied to a gearbox of a pure electric vehicle. Of course, it can also be applied to the gearbox of any other applicable vehicle, and there is no specific limitation here. Among them, the gearbox of a pure electric vehicle does not distinguish between the front axle and the rear axle.

When the gearbox control method provided in this embodiment is applied to the rear axle gearbox of the hybrid vehicle, the corresponding motor is the rear axle motor of the hybrid vehicle, and the corresponding vehicle actual torque is the actual torque of the rear axle of the hybrid vehicle.

It should be understood that in the above embodiments, the serial numbers of the steps do not mean the order of execution; the execution order of the steps should be determined by their functions and internal logic, and the serial numbers of the steps should not constitute any guarantee for the implementation process of the present application. limited.

The following are device implementations of the present application, and for details that are not described in detail, reference may be made to the above corresponding method implementations.

Fig. 2 is a schematic structural diagram of a control device for a gearbox of a new energy vehicle provided by an embodiment of the present application. For ease of illustration, only the parts relevant to the present application are shown in the figure.

As shown in FIG. 2 , the control device 30 of the new energy vehicle gearbox includes a detection module 31 and a control module 32 .

The detection module 31 is used to obtain the gear position self-learning after the vehicle sleep state is released, when the transmission gear information before the vehicle sleep is not detected, and the gear position self-learning fails after the transmission gear information before the vehicle sleep is not detected. The current logical gear of the vehicle and the current depth of the accelerator pedal being stepped on, and receive the current transmission fault signal and the current transmission controller status signal sent by the transmission controller of the vehicle;

The control module 32 is used to control the transmission to shift gears in an emergency when the following conditions are met: the current logical gear is a forward gear or a reverse gear; The gearbox fault signal determines that the current gearbox does not have the first preset fault, and the current gearbox controller status signal determines that the current gearbox controller does not have the second preset fault, and the gearbox gear before the vehicle sleep has not yet been detected information.

In this embodiment, the control device, through the detection module and the control module, after the vehicle sleep state is released, when the transmission gear information before the vehicle sleep is not detected, and the transmission gear information before the vehicle sleep is not detected When the information rear gear self-learning fails, if it is detected that the current logical gear is a forward gear or a reverse gear, and the current accelerator pedal is depressed to a depth greater than the preset depth threshold, it is determined that the user has an urgent travel demand; If there is no first preset fault in the transmission box, no second preset fault in the current gearbox controller, and the gear information of the gearbox before the vehicle sleep is still not detected, it is determined that the vehicle meets the emergency driving conditions; at this time, the transmission can be controlled Gearbox emergency shifting, so that when the gear information of the gearbox before the vehicle sleeps is lost and the gear self-learning fails, when the user has an emergency travel demand and the vehicle meets the emergency driving conditions, the control device can control The vehicle starts in an emergency to meet the user's emergency travel needs.

In a possible implementation manner, the detection module 31 is also used for:

Correspondingly, the control module 32 is specifically used for:

In a possible implementation manner, the gearbox is a two-speed gearbox;

The control module 32 is specifically used for:

Control the transmission into 1st or 2nd gear.

In a possible implementation manner, the control device for the gearbox of the new energy vehicle further includes:

In a possible implementation manner, the control module 32 is specifically used for:

The present application also provides a computer program product, which has a program code, and when the program code runs in a corresponding processor, controller, computing device or electronic device, it executes the implementation of any one of the above-mentioned new energy vehicle gearbox control methods Steps in the manner, such as S101 and S102 shown in FIG. 1 . Those skilled in the art should understand that the methods and corresponding devices proposed in the embodiments of the present application can be implemented in various forms of hardware, software, firmware, dedicated processors or combinations thereof. Special purpose processors may include Application Specific Integrated Circuits (ASICs), Reduced Instruction Set Computers (RISCs), and/or Field Programmable Gate Arrays (FPGAs). The methods and devices proposed in the various embodiments of the present application are preferably implemented as a combination of hardware and software. The software is preferably installed as an application program on the program storage device. It is typically a computer platform based machine having hardware, such as one or more central processing units (CPUs), random access memory (RAM), and one or more input/output (I/O) interfaces. An operating system is also typically installed on the computer platform. Various procedures and functions described herein may be part of the application program, or a part thereof may be executed by the operating system.

Fig. 3 is a schematic diagram of an electronic device provided by the present application. As shown in FIG. 3 , the electronic device 4 includes: a processor 40 , a memory 41 , and a computer program 42 stored in the memory 41 and operable on the processor 40 . When the processor 40 executes the computer program 42, it implements the steps in the above-mentioned embodiments of the control method of each new energy vehicle gearbox, such as S101 and S102 shown in FIG. 1 . Alternatively, when the processor 40 executes the computer program 42, it realizes the functions of the modules/units in the above-mentioned device implementations, for example, the functions of the modules 31 and 32 shown in FIG. 2 .

Exemplarily, the computer program 42 can be divided into one or more modules/units; for example, the computer program 42 can be divided into the modules 31 and 32 shown in FIG. 2 . These modules/units may be stored in the memory 41 and executed by the processor 40 to complete/implement the solutions provided in this application. These modules/units may be a series of computer program instruction segments capable of accomplishing specific functions, and these instruction segments can describe the execution process of the computer program 42 in the electronic device 4 .

The electronic device 4 may be a device such as a vehicle controller. The electronic device 4 may include, but is not limited to, a processor 40 and a memory 41 . Those skilled in the art can understand that FIG. 3 is only an example of the electronic device 4 and does not constitute a limitation to the electronic device 4 . Electronic device 4 may include more or fewer components than shown in FIG. 3 , or combine certain components, or different components. For example, the electronic device 4 may also include an input and output device, a network access device, a bus, and the like.

The processor 40 can be a central processing unit (Central Processing Unit, CPU), and can also be other general-purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), Field Programmable Gate Array (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any other conventional processor or the like.

The storage 41 may be an internal storage unit of the electronic device 4 , such as a hard disk or memory of the electronic device 4 . The memory 41 can also be an external storage device of the electronic device 4, such as a plug-in hard disk equipped on the electronic device 4, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD) card, a flash memory card (Flash Card) and so on. Further, the memory 41 may also include both an internal storage unit of the electronic device 4 and an external storage device. The memory 41 is capable of storing a computer program 42 and other programs and data required by the electronic device 4 . The memory 41 is also capable of temporarily storing data that has been output or will be output.

Corresponding to the above-mentioned electronic equipment, the present application also provides a vehicle, the vehicle includes the above-mentioned electronic equipment, and the beneficial effect produced by it is the same as that of the above-mentioned electronic equipment.

Those skilled in the art can clearly understand that, for convenience and brevity of description, only the division of the above functional units and modules is used as an example for illustration. In practical applications, the above function allocation can be completed by different functional units or modules according to needs, that is, the internal structure of the device is divided into different functional units or modules to complete all or part of the functions described above. Each functional unit and module in the implementation manner may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the protection scope of the present application. For the specific working process of the units and modules in the above-mentioned device, reference may be made to the corresponding process in the foregoing method implementation manner, and details are not repeated here.

In the foregoing implementation manners, the descriptions of each implementation manner have their own emphases, and for parts that are not detailed or recorded in a certain implementation manner, refer to the relevant descriptions of other implementation manners.

Those skilled in the art can appreciate that the units and algorithm steps of the examples described in the various embodiments disclosed in the present application can be realized by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions for each specific application, but these implementation methods should not be regarded as exceeding the scope of the present application.

In the implementation manners provided in this application, it should be understood that the disclosed device/electronic equipment and method may be implemented in other ways. For example, the apparatus/electronic device embodiments described above are illustrative only. For example, the division of modules or units is only a logical function division, and there may be other division methods in actual implementation. For example, several units or components may be combined or integrated into another system, or some features may be omitted, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

The units described above as separate components may or may not be physically separated, and the components shown as units may or may not be physical units. That is, the above components and units may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the technical solution provided by this embodiment.

If the integrated module/unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present application implements all or part of the procedures in the above-mentioned method implementations, which may be completed by controlling related hardware through computer programs. The computer program can be stored in a computer-readable storage medium, and when the computer program is executed by the processor, it can realize the steps of the above-mentioned implementation methods of each new energy vehicle transmission control method. Wherein, the computer program includes computer program code, and the computer program code may be in the form of source code, object code, executable file or some intermediate form. The computer-readable medium may include: any entity or device capable of carrying the computer program code, a recording medium, a USB flash drive, a removable hard disk, a magnetic disk, an optical disk, a computer memory, and a read-only memory (Read-Only Memory, ROM) , random access memory (Random Access Memory, RAM), electric carrier signal, telecommunication signal and software distribution medium, etc. It should be noted that the content contained in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, computer readable media exclude electrical carrier signals and telecommunication signals under legislative and patent practice.

Furthermore, the embodiments shown in the drawings of the present application or the features of the various embodiments mentioned in this specification should not be understood as independent features of each other. Rather, each feature described in one example of an embodiment can be combined with one or more desired features from other embodiments to produce other embodiments that are not described in words or with reference to the figures.

The above-mentioned embodiments are only used to illustrate the technical solutions of the present application, not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still apply to the foregoing embodiments Modifications to the technical solutions recorded in the method, or equivalent replacement of some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the application, and should be included in the Within the protection scope of this application.

Claims

A control method for a gearbox of a new energy vehicle, characterized by comprising:

After the vehicle sleep state is released, when the transmission gear information before the vehicle sleep is not detected, and the gear self-learning fails after the transmission gear information before the vehicle sleep is not detected, the current logic of the vehicle is acquired The gear position and the current depth of the accelerator pedal being stepped on, and receive the current transmission fault signal and the current transmission controller status signal sent by the transmission controller of the vehicle;

When the following conditions are met, the transmission is controlled to shift into gear in an emergency: the current logical gear is a forward gear or a reverse gear; The gearbox does not have the first preset fault, and it is determined by the current gearbox controller status signal that the gearbox controller does not have the second preset fault, and the gearbox gear information before the vehicle sleep has not yet been detected.
The control method of the new energy vehicle gearbox according to claim 1, characterized in that, after the vehicle sleep state is released, when the gear information of the gearbox before the vehicle sleep is not detected, and the gear information before the vehicle sleep is not detected When the gear position self-learning after the transmission gear information fails, the control method of the new energy vehicle transmission further includes:

Obtain the current engine state, current vehicle speed and current actual vehicle torque;

When the following conditions are met, the gearbox is controlled to shift gears urgently: the current logical gear is forward gear or reverse gear, the current depth of the accelerator pedal being depressed is greater than the preset depth threshold, and the current gearbox does not have the first gear. Preset fault, the current transmission controller does not have the second preset fault, the transmission gear information before the vehicle sleep has not yet been detected, the current engine state is on, and the current vehicle speed is not greater than the preset vehicle speed threshold and the current actual vehicle torque is not greater than the preset torque threshold.
The method for controlling a new energy vehicle gearbox according to claim 1, wherein the gearbox is a two-speed gearbox;

The control of the emergency shifting of the gearbox includes:

Control the gearbox to enter 1st gear or 2nd gear.
The method for controlling the gearbox of a new energy vehicle according to claim 3, wherein when the gearbox is controlled to shift into gear in an emergency, it enters the second gear.
The control method of the gearbox of a new energy vehicle according to claim 1, characterized in that, the number of gears of the gearbox is at least three; when the gearbox is controlled to enter a gear in an emergency, it enters the highest gear.
The control method of the new energy vehicle gearbox according to claim 1, wherein the control method of the new energy vehicle gearbox further comprises:

During the entire life cycle of the vehicle, record the number of emergency shifts of the gearbox;

When the number of times of controlling the gearbox for emergency gear shifting is greater than a preset times threshold, the gearbox is prohibited for emergency gear shifting.
The method for controlling the gearbox of a new energy vehicle according to claim 6, wherein when the number of emergency gear shifts of the gearbox is controlled to be greater than a preset times threshold, the current gear information of the gearbox is recorded .
The method for controlling the gearbox of a new energy vehicle according to claim 1, wherein the controlling the emergency shift of the gearbox includes:

Sending an emergency shift request to the transmission controller; wherein, the emergency shift request is used to instruct the transmission controller to control the transmission emergency shift.
The method for controlling the gearbox of a new energy vehicle according to claim 8, wherein when the gearbox controller receives an emergency shift request, the gearbox controller controls the power unit to drive the gearbox The fork moves to the preset position.
The method for controlling a gearbox of a new energy vehicle according to claim 9, wherein the vehicle is a hybrid vehicle, the gearbox is a rear axle gearbox of the hybrid vehicle, and the power unit is the Rear axle motors for hybrid vehicles.
The method for controlling a gearbox of a new energy vehicle according to any one of claims 1 to 9, wherein when the vehicle is a hybrid vehicle, the gearbox is a rear axle gearbox of the hybrid vehicle , the gearbox controller is a rear axle gearbox controller of the hybrid vehicle;

When the vehicle is a pure electric vehicle, the gearbox is a gearbox of the pure electric vehicle, and the gearbox controller is a gearbox controller of the pure electric vehicle.
A control device for a new energy vehicle gearbox, characterized in that it includes:

The detection module is used to obtain all gear information when the transmission gear information before vehicle dormancy is not detected after the vehicle dormancy state is released, and the gear position self-learning fails after the transmission gear information before vehicle dormancy is not detected. The current logical gear of the vehicle and the current depth of the accelerator pedal being stepped on, and receive the current transmission fault signal and the current transmission controller status signal sent by the transmission controller of the vehicle;

The control module is configured to control the transmission to shift gears in an emergency when the following conditions are met: the current logical gear is a forward gear or a reverse gear, the depth at which the current accelerator pedal is depressed is greater than a preset depth threshold, and the current transmission through the current transmission It is determined by the fault signal that there is no first preset fault in the current gearbox, and it is determined by the current gearbox controller status signal that there is no second preset fault in the current gearbox controller, and the shift before the vehicle sleep has not yet been detected Box gear information.
An electronic device, comprising a memory, a processor, and a computer program stored in the memory and operable on the processor, characterized in that the above claim 1 is realized when the processor executes the computer program The steps of the control method for the new energy vehicle gearbox described in any one of 11 to 11.
A vehicle characterized by comprising the control device according to claim 12.
A computer-readable storage medium, the computer-readable storage medium stores a computer program, characterized in that, when the computer program is executed by a processor, it realizes the new energy vehicle described in any one of claims 1 to 11 above Steps of a control method of a gearbox.