Flow electromagnetic valve opening current learning method and device

Abstract

The invention provides a flow electromagnetic valve opening current learning method and device, and the method comprises the steps: judging whether a vehicle meets a preset learning activation condition or not according to the current speed of the vehicle and the working state of a hybrid transmission, and controlling the current of a flow electromagnetic valve to be at an absolute middle position when the vehicle meets the preset learning activation condition, the shifting fork is pushed to the end point position with a small current change gradient, when the absolute value of the movement speed of the shifting fork is larger than the target movement speed, namely the shifting fork has the slight movement speed, it can be determined that an opening of the flow electromagnetic valve is opened, flow occurs, and at the moment, the current current of the flow electromagnetic valve is determined as the learned opening current of the flow electromagnetic valve. Therefore, based on the learned starting current, the controller can accurately identify the characteristics of the flow electromagnetic valve, so that the low-speed control difficulty of the shifting fork is reduced, and the phenomena of impact at the end of gear engagement or failure of gear disengagement are effectively reduced.

Description

Technical Field

[0001] The present application relates to the technical field of transmissions, and in particular to a method, device, storage medium and equipment for learning the opening current of a flow solenoid valve. Background Art

[0002] A hybrid transmission is a gearbox designed specifically for hybrid vehicles. At present, there are various gear execution methods for hybrid transmissions, including proportional solenoid valve control, flow solenoid valve control, BLDC (Brushless Direct Current Motor) motor control, etc., which are inherited from traditional transmissions. Among them, the flow solenoid valve as a gear actuator has a greater application advantage due to its low cost, simple control, and stable fork movement.

[0003] Accurately identifying the relationship between the flow rate Q and the current I of the flow solenoid valve is the basic guarantee for the above advantages. The QI characteristics of the flow solenoid valve involve two important parameters, namely the positive flow opening current and the negative flow opening current. When the flow solenoid valve current is greater than the positive flow opening current, the right opening of the flow solenoid valve opens, and the flow is injected into the right oil chamber of the fork piston through the flow solenoid valve, and the piston moves to the left, which can be used to engage the first gear or disengage the neutral gear from the second gear; when the flow solenoid valve current is less than the negative flow opening current, the right opening of the flow solenoid valve opens, and the flow is injected into the left oil chamber of the fork piston through the flow solenoid valve, and the piston moves to the right, which can be used to engage the second gear or disengage the neutral gear from the first gear. However, due to manufacturing differences and application losses, the positive flow opening current and the negative flow opening current are different in different components, which makes it difficult to control the fork at low speed, and it is easy to cause the impact of the end of gear engagement or the failure of gear disengagement. Summary of the invention

[0004] The purpose of the present application is to provide a flow solenoid valve opening current learning method, device, storage medium and equipment, aiming to solve the problem that the low-speed control of the hybrid transmission fork is difficult, which is easy to cause gear end impact or gear disengagement failure.

[0005] In a first aspect, the present application provides a flow solenoid valve opening current learning method, comprising: obtaining a current operating state of a vehicle, and judging whether the vehicle meets a preset learning activation condition based on the operating state; the operating state includes a vehicle speed and a working state of a hybrid transmission of the vehicle; when the vehicle meets the preset learning activation condition, controlling the current of the flow solenoid valve to change from an absolute middle position at a target change rate according to the current gear position; the absolute middle position is a current value corresponding to when the flow solenoid valve is in a closed position; when the absolute value of the movement speed of the shift fork of the hybrid transmission is greater than the target movement speed, determining the current current of the flow solenoid valve as the opening current of the flow solenoid valve learned this time.

[0006] In the above implementation process, according to the current vehicle speed and the working state of the hybrid transmission, it is judged whether the vehicle meets the preset learning activation conditions. When the vehicle meets the preset learning activation conditions, the current of the control flow solenoid valve is in the absolute middle position, and the shift fork is pushed to the end position with a small current change gradient. When the absolute value of the movement speed of the shift fork is greater than the target movement speed, that is, when the shift fork has a slight movement speed, it can be determined that the flow solenoid valve is open and flow occurs. At this time, the current current of the flow solenoid valve is determined as the opening current of the flow solenoid valve learned this time. In this way, based on the learned opening current, the controller can accurately identify the characteristics of the flow solenoid valve, thereby reducing the difficulty of low-speed control of the shift fork and effectively reducing the impact of the end of gear shifting or the failure of gear shifting.

[0007] Further, in some examples, the preset learning activation conditions include: the vehicle speed exceeds a first speed value and lasts for a longer period of time than a target time; the hybrid transmission has no faults; the hybrid transmission is in parallel mode; the shift fork is in gear and lasts for a longer period of time than the target time; the oil temperature of the hybrid transmission is higher than a first temperature value and lasts for a longer period of time than the target time; the pressure of the hybrid transmission exceeds a first pressure value and lasts for a longer period of time than the target time; and the number of consecutive learning times of the flow solenoid valve opening current does not exceed the target number of times.

[0008] In the above implementation process, conditions are provided for determining whether the learning action can be activated. By setting the above conditions, the learning of the opening current of the flow solenoid valve can be activated at an appropriate time, thereby effectively improving the learning success rate and the accuracy of the learning value.

[0009] Further, in some examples, the current of the flow solenoid valve controlled according to the current gear changes from the absolute middle position at a target change rate, including: if the current gear is the first gear, the current of the flow solenoid valve is gradually increased from the absolute middle position at the target change rate; if the current gear is the second gear, the current of the flow solenoid valve is gradually decreased from the absolute middle position at the target change rate.

[0010] In the above implementation process, a specific method is provided for controlling the current of the flow solenoid valve to push the shift fork to the end position.

[0011] Furthermore, in some examples, it also includes: when the current of the flow solenoid valve is greater than the first current value, or the current of the flow solenoid valve is less than the second current value, exiting the current learning of the flow solenoid valve opening current.

[0012] In the above implementation process, when the current of the flow solenoid valve is greater than the first current value or less than the second current value, and the absolute value of the movement speed of the shift fork is still not greater than the target movement speed, it indicates that the piston of the hybrid transmission may be in an extreme position. At this time, the controller exits learning, thereby reducing the waste of learning resources.

[0013] Furthermore, in some examples, it also includes: in the process of controlling the current of the flow solenoid valve to change from an absolute middle position at a target change rate according to the current gear position, real-time monitoring of the operating state of the vehicle; if it is determined according to the monitoring result that the vehicle meets any one of the following preset learning exit conditions, exiting the flow solenoid valve opening current learning: the vehicle speed is lower than the second speed value; the hybrid transmission fails; the hybrid transmission is in non-parallel mode; the shift fork has a need to shift out of gear; the oil temperature of the hybrid transmission is lower than the second temperature value; the pressure of the hybrid transmission is lower than the second pressure value.

[0014] In the above implementation process, conditions are provided for determining whether to exit the learning action. By setting the above conditions, the learning of the opening current of the flow solenoid valve can be exited at an appropriate time, thereby effectively reducing the waste of learning resources.

[0015] Further, in some examples, the current current of the flow solenoid valve is determined as the opening current of the flow solenoid valve learned this time, including: if the current gear is the first gear, the current current of the flow solenoid valve is determined as the positive flow opening current of the flow solenoid valve learned this time; if the current gear is the second gear, the current current of the flow solenoid valve is determined as the negative flow opening current of the flow solenoid valve learned this time.

[0016] In the above implementation process, a specific method for obtaining the learning values ​​of the positive flow start current and the negative flow start current is provided.

[0017] Further, in some examples, the absolute middle position is 750 mA; the target change rate is 20 mA / s; the target movement speed is 5 mm / s; the first current value is 1200 mA; and the second current value is 300 mA.

[0018] In the above implementation process, optional values ​​of control parameters involved in the flow solenoid valve opening current learning action are provided to improve the learning accuracy.

[0019] In the second aspect, the present application provides a flow solenoid valve opening current learning device, including: an acquisition module, used to obtain the current operating state of the vehicle, and determine whether the vehicle meets the preset learning activation conditions based on the operating state; the operating state includes the vehicle speed and the working state of the hybrid transmission of the vehicle; a control module, used to control the current of the flow solenoid valve to change from an absolute middle position at a target change rate according to the current gear position when the vehicle meets the preset learning activation conditions; the absolute middle position is the current value corresponding to the flow solenoid valve in the closed position; a determination module, used to determine the current current of the flow solenoid valve as the opening current of the flow solenoid valve learned this time when the absolute value of the movement speed of the hybrid transmission fork is greater than the target movement speed.

[0020] In a third aspect, the present application provides an electronic device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the method described in any one of the first aspects when executing the computer program.

[0021] In a fourth aspect, the present application provides a computer-readable storage medium, on which instructions are stored. When the instructions are executed on a computer, the computer executes the method as described in any one of the first aspects.

[0022] In a fifth aspect, the present application provides a computer program product, which, when running on a computer, enables the computer to execute the method as described in any one of the first aspects.

[0023] Other features and advantages disclosed in the present application will be described in the following description, or some features and advantages can be inferred or determined without doubt from the description, or can be learned by implementing the above-mentioned technology disclosed in the present application.

[0024] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 A flow chart of a flow solenoid valve opening current learning method provided in an embodiment of the present application;

[0027] Figure 2 A schematic diagram of a typical application scenario in which a flow solenoid valve is used as a shift fork action execution component provided in an embodiment of the present application;

[0028] Figure 3 A schematic diagram of the QI characteristics of a QPV solenoid valve provided in an embodiment of the present application;

[0029] Figure 4 A block diagram of a flow solenoid valve opening current learning device provided in an embodiment of the present application;

[0030] Figure 5 A structural block diagram of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0032] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0033] As described in the background technology, in the related art, there is a problem that the low-speed control of the hybrid transmission shift fork is difficult, which easily causes the impact of gear shifting or gear shifting failure. Based on this, the embodiment of the present application provides a flow solenoid valve opening current learning solution to solve the above problem.

[0034] Next, the embodiments of the present application are introduced:

[0035] like Figure 1 As shown, Figure 1This is a flow chart of a flow solenoid valve opening current learning method provided in an embodiment of the present application. The method can be applied to controllers on vehicles, such as vehicle control units (VCU), domain controllers (DCU), etc. The vehicle is equipped with a hybrid transmission. In this embodiment, the controller performs self-learning on the opening current of the flow solenoid valve in the hybrid transmission during the actual vehicle operation, and then accurately realizes the flow control of the flow solenoid valve according to the learning value. The flow solenoid valve here can be a QPV solenoid valve, which is a flow solenoid valve whose output is proportional to the control input. Of course, the flow solenoid valve can also be other types of flow solenoid valves.

[0036] The method comprises:

[0037] Step 101, obtaining the current running state of the vehicle, and judging whether the vehicle meets the preset learning activation condition according to the running state; the running state includes the vehicle speed and the working state of the hybrid transmission of the vehicle;

[0038] In this embodiment, the controller obtains the operating status of the vehicle in real time or periodically to determine whether the learning function can be activated. The operating status of the vehicle includes the vehicle speed and the operating status of the hybrid transmission, such as whether the hybrid transmission system is faulty, system pressure, working mode, oil temperature of the hybrid transmission, the status of the shift fork, etc. These operating states will affect the learning of the opening current of the flow solenoid valve. Therefore, when the operating state of the vehicle meets the preset learning activation conditions, the controller will perform the learning action for the opening current of the flow solenoid valve to improve the learning success rate.

[0039] In some embodiments, the preset learning activation conditions mentioned in this step may include: the vehicle speed exceeds a first speed value and lasts for more than a target time; the hybrid transmission has no faults; the hybrid transmission is in parallel mode; the shift fork is in gear and lasts for more than the target time; the oil temperature of the hybrid transmission is higher than a first temperature value and lasts for more than the target time; the pressure of the hybrid transmission exceeds a first pressure value and lasts for more than the target time; and the number of consecutive learning times of the flow solenoid valve opening current does not exceed the target number.

[0040] That is to say, when the vehicle meets the above seven conditions at the same time, the controller determines that the learning function can be activated, wherein, optionally, the first speed value can be 50km / h; the first temperature value can be 30°C; the first pressure value can be 10bar; the target time can be 1s; and the target number of times can be 2 times. Through this setting, the learning of the flow solenoid valve opening current can be activated at the appropriate time, thereby effectively improving the learning success rate and the accuracy of the learning value.

[0041] Step 102: When the vehicle meets the preset learning activation condition, the current of the flow solenoid valve is controlled to change from an absolute middle position at a target change rate according to the current gear; the absolute middle position is the current value corresponding to when the flow solenoid valve is in a closed position;

[0042] The absolute middle position mentioned in this step is the current value corresponding to the flow solenoid valve in the closed position, that is, when the current of the flow solenoid valve is this current value, even if wear or aging occurs, the flow solenoid valve is always in the closed position. The absolute middle position can be obtained by actual vehicle calibration. Optionally, the absolute middle position is 750mA. This value is obtained by testing the flow solenoid valve mainly used in the current hybrid transmission. Of course, when the hybrid transmission uses flow solenoid valves of different models and specifications, its absolute middle position may also be different.

[0043] In some embodiments, the current of the flow solenoid valve controlled by the current gear changes from the absolute middle position at a target change rate mentioned in this step may include: if the current gear is the first gear, the current of the flow solenoid valve is gradually increased from the absolute middle position at a target change rate; if the current gear is the second gear, the current of the flow solenoid valve is gradually reduced from the absolute middle position at a target change rate. In other words, the controller adopts different learning actions according to the current gear. If the current gear is the first gear, the controller commands the flow solenoid valve current to start from the absolute middle position and gradually increase according to a fixed current change gradient. If the current gear is the second gear, the controller commands the flow solenoid valve current to start from the absolute middle position and gradually decrease according to a fixed current change gradient. Among them, the target change rate can be 20mA / s. In this way, the fork is pushed to the end position with a smaller current change gradient, which improves the accuracy of the opening current learning value to a certain extent.

[0044] Step 103: When the absolute value of the movement speed of the shift fork of the hybrid transmission is greater than the target movement speed, the current current of the flow solenoid valve is determined as the opening current of the flow solenoid valve learned this time.

[0045] In this embodiment, after activating the learning function, the controller controls the current of the flow solenoid valve to be in the absolute middle position, and pushes the shift fork to the end position with a small current change gradient. In this way, when the shift fork is detected to have a slight movement speed, it can be determined that the flow solenoid valve is open and flow occurs. The current current is the opening current of the flow solenoid valve, thereby completing the learning of the opening current of the flow solenoid valve. In this way, based on the learning value, the controller can accurately identify the characteristics of the flow solenoid valve, thereby reducing the difficulty of low-speed control of the shift fork and effectively reducing the impact of the end of gear engagement or the failure of gear disengagement. Among them, the target movement speed mentioned in this step can be set according to the detection accuracy of the sensor used to detect the movement speed of the shift fork. Optionally, the target movement speed can be 5mm / s.

[0046] In some embodiments, the step of determining the current current of the flow solenoid valve as the opening current of the flow solenoid valve learned this time may include: if the current gear is the first gear, determining the current current of the flow solenoid valve as the positive flow opening current of the flow solenoid valve learned this time; if the current gear is the second gear, determining the current current of the flow solenoid valve as the negative flow opening current of the flow solenoid valve learned this time. That is to say, taking the target movement speed of 5mm / s as an example, when the learning function is activated, if the current gear is the first gear and the fork movement speed is greater than 5mm / s, the current command current is considered to be the positive flow opening current, and if the current gear is the second gear and the fork movement speed is less than -5mm / s, the current command current is considered to be the negative flow opening current. In this way, the learning of the positive flow opening current and the negative flow opening current of the flow solenoid valve is achieved.

[0047] In some embodiments, it also includes: when the current of the flow solenoid valve is greater than the first current value, or the current of the flow solenoid valve is less than the second current value, exit the current learning of the flow solenoid valve opening current. That is to say, when the learning function is activated, if the current gear is the first gear, the controller controls the current of the flow solenoid valve to gradually increase from the absolute middle position until the current of the flow solenoid valve is the first current value, and if the current gear is the second gear, the current of the flow solenoid valve of the controller gradually decreases from the absolute middle position until the current of the flow solenoid valve is the second current value. When the current of the flow solenoid valve is greater than the first current value or less than the second current value, and the absolute value of the movement speed of the shift fork is still not greater than the target movement speed, it indicates that the piston of the hybrid transmission may be in the limit position. At this time, the controller exits the learning, thereby reducing the waste of learning consumption resources. Among them, the first current value and the second current value can be set according to the absolute middle position of the flow solenoid valve and the needs of the specific scene. Optionally, when the absolute middle position is 750mA, the first current value can be 1200mA, and the second current value can be 300mA.

[0048] Further, in some embodiments, it also includes: in the process of controlling the current of the flow solenoid valve to change from the absolute middle position at the target change rate according to the current gear, real-time monitoring of the running state of the vehicle; if it is determined according to the monitoring result that the vehicle meets any of the following preset learning exit conditions, exiting the current flow solenoid valve opening current learning: the vehicle speed is lower than the second speed value; the hybrid transmission fails; the hybrid transmission is in non-parallel mode; the shift fork has a need to disengage; the oil temperature of the hybrid transmission is lower than the second temperature value; the pressure of the hybrid transmission is lower than the second pressure value. That is to say, during the learning process, the controller monitors the running state of the vehicle in real time. When the vehicle meets any of the above preset learning exit conditions, it indicates that the learning condition is not met at this time, and the controller exits the learning of the opening current of the flow solenoid valve. Optionally, the second speed value can be 30km / h; the second temperature value can be 20℃; and the second pressure value can be 8bar. Through this setting, the learning of the opening current of the flow solenoid valve can be exited at an appropriate time, thereby effectively reducing the waste of learning resources.

[0049] In the embodiment of the present application, according to the current vehicle speed and the working state of the hybrid transmission, it is determined whether the vehicle meets the preset learning activation conditions. When the vehicle meets the preset learning activation conditions, the current of the control flow solenoid valve is in the absolute middle position, and the shift fork is pushed to the end position with a small current change gradient. When the absolute value of the movement speed of the shift fork is greater than the target movement speed, that is, when the shift fork has a slight movement speed, it can be determined that the flow solenoid valve is open and flow occurs. At this time, the current current of the flow solenoid valve is determined as the opening current of the flow solenoid valve learned this time. In this way, based on the learned opening current, the controller can accurately identify the characteristics of the flow solenoid valve, thereby reducing the difficulty of low-speed control of the shift fork and effectively reducing the occurrence of the impact of the end of gear shifting or the failure of gear shifting.

[0050] In order to explain the solution of this application in more detail, a specific embodiment is introduced below:

[0051] This embodiment provides a hybrid transmission flow solenoid valve opening current learning scheme. Figure 2 As shown, Figure 2 is a schematic diagram of a typical application scenario provided by this embodiment using a flow solenoid valve as a shift fork action execution component, wherein the hybrid transmission shown includes a position sensor 21, a piston and shift fork combination component 22, a flow solenoid valve 23, a main oil pressure reducing component 24 and an oil filter component 25, wherein the flow solenoid valve 23 is a QPV solenoid valve. In some scenarios, the QI characteristics of the QPV solenoid valve are as follows Figure 3As shown, the horizontal axis is the solenoid valve current, in mA; the vertical axis is the solenoid valve flow, in mL / min, the first characteristic point 31 is (900mA, 0mL / min), and the second characteristic point 32 is (600mA, 0mL / min), that is, when the solenoid valve current is within the range of 750mA±150mA, the solenoid valve is closed and no flow passes through. When the solenoid valve current is greater than 900mA, the right opening of the solenoid valve opens, and the flow is injected into the right oil chamber of the shift fork piston through the solenoid valve, and the piston moves to the left, which can achieve the first gear or the neutral gear from the second gear; when the solenoid valve current is less than 600mA, the right opening of the solenoid valve opens, and the flow is injected into the left oil chamber of the shift fork piston through the solenoid valve, and the piston moves to the right, which can achieve the second gear or the neutral gear from the first gear. However, due to manufacturing errors and wear and tear, the above two characteristic points are different in different components, which makes it difficult to control the shift fork at low speed, and it is easy to cause the impact of the end of the gear or the failure of the gear removal. The solution of this embodiment can effectively solve the above problem by self-learning the opening current of the flow solenoid valve.

[0052] This embodiment includes the following workflow:

[0053] S201, design of activation conditions for learning actions;

[0054] Specifically, when the vehicle meets the following working state conditions at the same time, it is determined that the learning action can be activated:

[0055] Working condition 1: The current shift fork is in the gear state and the duration is more than 1s;

[0056] Working condition 2: The current transmission oil temperature is higher than 30°C and the maintenance time exceeds 1s;

[0057] Working status condition three: the current system has no faults;

[0058] Working condition 4: The current system pressure exceeds 10 bar and is maintained for more than 1 second;

[0059] Working condition 5: The current vehicle speed exceeds 50kph and is maintained for more than 1s;

[0060] Working condition six: The current solenoid valve opening current is continuously learned for no more than 2 times;

[0061] S202, learning action exit condition design;

[0062] Specifically, when the vehicle meets any of the following exit conditions, it is determined that the learning action can be exited:

[0063] Exit condition 1: The current shift fork needs to be disengaged;

[0064] Exit condition 2: The current transmission oil temperature is lower than 20℃;

[0065] Exit condition three: The current system fails;

[0066] Exit condition 4: The current system pressure is lower than 8 bar;

[0067] Exit condition 5: current vehicle speed is less than 30kph;

[0068] Exit condition six: the fork movement speed is greater than 5mm / s or less than -5mm / s;

[0069] Exit condition seven: The command current of the solenoid valve is greater than 1200mA or less than 300mA;

[0070] Exit condition eight: The current hybrid transmission is in non-parallel mode;

[0071] S203, learning action design;

[0072] Specifically, when it is determined that the learning action can be activated, the following actions are performed:

[0073] If the current gear is the first gear, the solenoid valve current is commanded to gradually increase from 750mA at a rate of 20mA / s until the solenoid valve current reaches 1200mA;

[0074] If the current gear is the second gear, the solenoid valve current is commanded to gradually decrease from 750mA at a speed of 20mA / s until the solenoid valve current is 300mA;

[0075] S204, learning value judgment;

[0076] Specifically, when the learning action is activated, if the current gear is the first gear and the fork movement speed is greater than 5mm / s, the current command current is considered to be a positive flow start-up current; if the current gear is the second gear and the fork movement speed is less than -5mm / s, the current command current is considered to be a negative flow start-up current.

[0077] This embodiment can be applied to the application scenario where a flow valve is used as a shift fork actuator. Through this embodiment, the opening current of the flow valve can be accurately identified to ensure smooth and accurate gear movement, effectively avoiding the impact at the end of gear engagement or the failure of gear disengagement.

[0078] Corresponding to the embodiments of the aforementioned method, the present application also provides an embodiment of a flow solenoid valve opening current learning device and a terminal used therein:

[0079] like Figure 4 As shown, Figure 4 : is a block diagram of a flow solenoid valve opening current learning device provided in an embodiment of the present application, the device comprising:

[0080] An acquisition module 41 is used to acquire the current running state of the vehicle and determine whether the vehicle meets the preset learning activation condition according to the running state; the running state includes the vehicle speed and the working state of the hybrid transmission of the vehicle;

[0081] A control module 42, configured to control the current of the flow solenoid valve to change from an absolute middle position at a target change rate according to the current gear position when the vehicle meets a preset learning activation condition; the absolute middle position is a current value corresponding to when the flow solenoid valve is in a closed position;

[0082] The determination module 43 is configured to determine the current current of the flow solenoid valve as the opening current of the flow solenoid valve learned this time when the absolute value of the movement speed of the shift fork of the hybrid transmission is greater than the target movement speed.

[0083] The implementation process of the functions and effects of each module in the above-mentioned device is specifically described in the implementation process of the corresponding steps in the above-mentioned method, which will not be repeated here.

[0084] This application also provides an electronic device, see Figure 5 , Figure 5 A block diagram of an electronic device provided in an embodiment of the present application. The electronic device may include a processor 510, a communication interface 520, a memory 530, and at least one communication bus 540. The communication bus 540 is used to realize direct connection and communication between these components. The communication interface 520 of the electronic device in the embodiment of the present application is used to communicate signaling or data with other node devices. The processor 510 may be an integrated circuit chip with signal processing capabilities.

[0085] The processor 510 mentioned above can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor can be a microprocessor or the processor 510 can also be any conventional processor, etc.

[0086] The memory 530 may be, but is not limited to, a random access memory (RAM), a read only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electric erasable programmable read-only memory (EEPROM), etc. The memory 530 stores computer-readable instructions. When the computer-readable instructions are executed by the processor 510, the electronic device can execute the above-mentioned Figure 1 The method embodiment involves various steps.

[0087] Optionally, the electronic device may further include a storage controller and an input / output unit.

[0088] The memory 530, storage controller, processor 510, peripheral interface, input and output unit components are directly or indirectly electrically connected to each other to achieve data transmission or interaction. For example, these components can be electrically connected to each other via one or more communication buses 540. The processor 510 is used to execute executable modules stored in the memory 530, such as software function modules or computer programs included in the electronic device.

[0089] The input and output unit is used to provide users with the task creation and to create a start optional time period or preset execution time for the task to realize the interaction between the user and the server. The input and output unit can be, but is not limited to, a mouse and a keyboard.

[0090] Understandably, Figure 5 The structure shown is for illustration only, and the electronic device may also include Figure 5 More or fewer components as shown, or with Figure 5 Different configurations shown. Figure 5 Each component shown in the figure can be implemented by hardware, software or a combination thereof.

[0091] An embodiment of the present application further provides a storage medium having instructions stored thereon. When the instructions are run on a computer, the computer program is executed by a processor to implement the method described in the method embodiment. To avoid repetition, the method will not be described here.

[0092] The present application also provides a computer program product, which, when executed on a computer, enables the computer to execute the method described in the method embodiment.

[0093] In several embodiments provided in the present application, it should be understood that the disclosed devices and methods can also be implemented in other ways. The device embodiments described above are merely schematic. For example, the flowcharts and block diagrams in the accompanying drawings show the possible architecture, functions and operations of the devices, methods and computer program products according to multiple embodiments of the present application. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of a code, and the module, a program segment or a part of a code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flowchart, and the combination of boxes in the block diagram and / or flowchart can be implemented with a dedicated hardware-based system that performs a specified function or action, or can be implemented with a combination of dedicated hardware and computer instructions.

[0094] In addition, the functional modules in the various embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.

[0095] If the functions are implemented in the form of software function modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium, including several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0096] The above description is only an embodiment of the present application and is not intended to limit the scope of protection of the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0097] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0098] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

Claims

1. A flow solenoid valve opening current learning method, characterized in that: include: Obtaining the current operating state of the vehicle, and determining whether the vehicle meets the preset learning activation conditions according to the operating state; The operating state includes the vehicle speed and the operating state of the hybrid transmission of the vehicle; When the vehicle meets the preset learning activation conditions, the current of the flow solenoid valve is controlled to change from an absolute middle position at a target change rate according to the current gear; the absolute middle position is the current value corresponding to when the flow solenoid valve is in a closed position; When the absolute value of the movement speed of the shift fork of the hybrid transmission is greater than the target movement speed, the current current of the flow solenoid valve is determined as the opening current of the flow solenoid valve learned this time.

2. The method according to claim 1, characterized in that The preset learning activation conditions include: The vehicle speed exceeds the first speed value and the duration exceeds the target time; The hybrid transmission is trouble-free; The hybrid transmission is in parallel mode; The state of the shift fork is in the gear state, and the duration exceeds the target time; The oil temperature of the hybrid transmission is higher than the first temperature value and lasts longer than the target time; The pressure of the hybrid transmission exceeds a first pressure value and lasts longer than the target time; And the number of continuous learning of the flow solenoid valve opening current does not exceed the target number.

3. The method according to claim 1, characterized in that The current of the flow solenoid valve is controlled to change from an absolute middle position at a target change rate according to the current gear position, including: If the current gear is the first gear, the current of the control flow solenoid valve is gradually increased from the absolute middle position at the target change rate; If the current gear is the second gear, the current of the control flow solenoid valve is gradually reduced from the absolute middle position at the target change rate.

4. The method according to claim 3, characterized in that: Also includes: When the current of the flow solenoid valve is greater than the first current value, or the current of the flow solenoid valve is less than the second current value, the current flow solenoid valve opening current learning is exited.

5. The method according to claim 4, characterized in that Also includes: In the process of controlling the current of the flow solenoid valve to change from an absolute middle position at a target change rate according to the current gear position, real-time monitoring of the running state of the vehicle; If the vehicle meets any of the following preset learning exit conditions according to the monitoring results, the flow solenoid valve opening current learning is exited: The vehicle speed is lower than the second speed value; The hybrid transmission is malfunctioning; The hybrid transmission is in non-parallel mode; The shift fork needs to be disengaged; The oil temperature of the hybrid transmission is lower than a second temperature value; The pressure of the hybrid transmission is lower than the second pressure value.

6. The method according to claim 3, characterized in that The step of determining the current current of the flow solenoid valve as the opening current of the flow solenoid valve learned this time includes: If the current gear is the first gear, the current current of the flow solenoid valve is determined as the positive flow opening current of the flow solenoid valve learned this time; If the current gear is the second gear, the current current of the flow solenoid valve is determined as the negative flow opening current of the flow solenoid valve learned this time.

7. The method according to claim 4, characterized in that The absolute middle position is 750 mA; the target change rate is 20 mA / s; the target movement speed is 5 mm / s; the first current value is 1200 mA; and the second current value is 300 mA.

8. A flow solenoid valve opening current learning device, characterized in that: include: An acquisition module, used to acquire the current running state of the vehicle, and determine whether the vehicle meets the preset learning activation condition according to the running state; The operating state includes the vehicle speed and the operating state of the hybrid transmission of the vehicle; A control module, configured to control the current of the flow solenoid valve to change from an absolute middle position at a target change rate according to the current gear position when the vehicle meets a preset learning activation condition; the absolute middle position is a current value corresponding to when the flow solenoid valve is in a closed position; The determination module is used to determine the current current of the flow solenoid valve as the opening current of the flow solenoid valve learned this time when the absolute value of the movement speed of the shift fork of the hybrid transmission is greater than the target movement speed.

9. A computer-readable storage medium, characterized in that: A computer program is stored thereon, and when the computer program is executed by a processor, the method according to any one of claims 1 to 7 is implemented.

10. An electronic device, characterized in that: The method comprises a processor, a memory, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the method according to any one of claims 1 to 7 is implemented.

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