Flow electromagnetic valve opening current learning method and device

Abstract

The application provides a flow electromagnetic valve opening current learning method and device. In the method, whether the vehicle meets a preset learning activation condition is determined according to the current vehicle speed and the working state of the hybrid transmission. When the vehicle meets the preset learning activation condition, the current of the flow electromagnetic valve is controlled to be at an absolute intermediate position, and the shift fork is pushed to an endpoint 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 is determined that the flow electromagnetic valve is opened, and the flow appears. At this time, the current of the flow electromagnetic valve is determined as the opening current of the flow electromagnetic valve learned this time. In this way, based on the learned opening current, the controller can accurately identify the characteristics of the flow electromagnetic valve, thereby reducing the difficulty of low-speed control of the shift fork and effectively reducing the phenomenon of gear engagement end impact or gear removal failure.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of transmission, in particular, relates to a flow electromagnetic valve opening current learning method and device, a storage medium and equipment. BACKGROUND

[0002] The hybrid transmission is a gearbox specially designed for hybrid electric vehicles. At present, the gear execution mode of the hybrid transmission is various, including the proportional electromagnetic valve control, flow electromagnetic valve control and BLDC (Brushless Direct Current Motor) motor control used from the traditional transmission. Among them, the flow electromagnetic valve as a gear actuator has great application advantages due to its low cost, simple control and stable shift fork movement.

[0003] Accurate identification of the relationship between the flow Q and the current I of the flow electromagnetic valve is the basic guarantee of the above advantages. The QI characteristics of the flow electromagnetic valve involve two important parameters, namely the positive flow opening current and the negative flow opening current. When the current of the flow electromagnetic valve is greater than the positive flow opening current, the right opening of the flow electromagnetic valve is opened, the flow is injected into the right oil chamber of the shift fork piston through the flow electromagnetic valve, the piston moves to the left, and the 1st gear can be engaged or the 2nd gear can be disengaged. When the current of the flow electromagnetic valve is less than the negative flow opening current, the right opening of the flow electromagnetic valve is opened, the flow is injected into the left oil chamber of the shift fork piston through the flow electromagnetic valve, the piston moves to the right, and the 2nd gear can be engaged or the 1st gear can be disengaged. However, due to production and manufacturing differences and application losses, the positive flow opening current and the negative flow opening current differ on different components, which makes the low-speed control of the shift fork difficult and prone to end impact or disengagement failure. SUMMARY

[0004] The purpose of the present application is to provide a flow electromagnetic valve opening current learning method and device, a storage medium and equipment, which aims to solve the problem of low-speed control difficulty of the shift fork of the hybrid transmission in the related art, which is prone to end impact or disengagement failure.

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

[0006] In the implementation process, whether the vehicle meets the preset learning activation condition is determined according to the current vehicle speed and the operating state of the hybrid transmission, and in a case where the vehicle meets the preset learning activation condition, the current of the flow electromagnetic valve is controlled to be at the absolute intermediate position, so as to push the shift fork to an end position at 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 is determined that the flow electromagnetic valve is opened and has a flow; at this time, the current of the flow electromagnetic valve is determined as the opening current of the flow electromagnetic valve learned this time. In this way, based on the learned opening current, the controller can accurately identify the characteristics of the flow electromagnetic valve, thereby reducing the difficulty of low-speed control of the shift fork and effectively reducing the phenomenon of end impact or failure to shift gears.

[0007] Further, in some examples, the preset learning activation condition comprises: the vehicle speed being greater than a first speed value and a duration being greater than a target time; the hybrid transmission being fault-free; the hybrid transmission being in a parallel mode; the state of the shift fork being in a gear state and a duration being greater than the target time; the oil temperature of the hybrid transmission being higher than a first temperature value and a duration being greater than the target time; the pressure of the hybrid transmission being greater than a first pressure value and a duration being greater than the target time; and the number of continuous learning of the opening current of the flow electromagnetic valve being not greater than a target number.

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

[0009] Further, in some examples, the controlling of the current of the flow electromagnetic valve to change from the absolute intermediate position at the target change rate according to the current gear comprises: if the current gear is one gear, gradually increasing the current of the flow electromagnetic valve from the absolute intermediate position at the target change rate; and if the current gear is two gears, gradually decreasing the current of the flow electromagnetic valve from the absolute intermediate position at the target change rate.

[0010] In the implementation process described above, a specific way of controlling the current of the flow electromagnetic valve to push the fork to the end position is provided.

[0011] Further, in some examples, further comprising: when the current of the flow electromagnetic valve is greater than the first current value or the current of the flow electromagnetic valve is less than the second current value, exiting the current learning of the flow electromagnetic valve.

[0012] In the implementation process described above, when the current of the flow electromagnetic 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 fork is still not greater than the target movement speed, it indicates that the piston of the hybrid transmission may be at the limit position, at which the controller exits the learning, thereby reducing the waste of learning resources.

[0013] Further, in some examples, further comprising: in the process of controlling the current of the flow electromagnetic valve to change from the absolute intermediate position at the target change rate according to the current gear, monitoring the running state of the vehicle in real time; if it is determined according to the monitoring result that the vehicle satisfies any one of the following preset learning exit conditions, exiting the current learning of the current of the flow electromagnetic valve: the vehicle speed is lower than a second speed value; the hybrid transmission has a fault; the hybrid transmission is in a non-parallel mode; the fork has a demand for gear shifting; the oil temperature of the hybrid transmission is lower than a second temperature value; the pressure of the hybrid transmission is lower than a second pressure value.

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

[0015] Further, in some examples, the current of the flow electromagnetic valve is determined as the opening current of the flow electromagnetic valve learned this time, comprising: if the current gear is one gear, the current of the flow electromagnetic valve is determined as the positive flow opening current of the flow electromagnetic valve learned this time; if the current gear is two gears, the current of the flow electromagnetic valve is determined as the negative flow opening current of the flow electromagnetic valve learned this time.

[0016] In the implementation process described above, a specific way of obtaining the learning values of the positive flow opening current and the negative flow opening current is provided.

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

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

[0019] In a second aspect, the application provides a flow electromagnetic valve opening current learning device, comprising: an acquisition module configured to acquire a current operating state of a vehicle, and determine whether the vehicle meets a preset learning activation condition according to the operating state; the operating state includes a vehicle speed and an operating state of a hybrid transmission of the vehicle; a control module configured to, when the vehicle meets the preset learning activation condition, control a current of a flow electromagnetic valve to change from an absolute intermediate position at a target change rate according to a current gear; the absolute intermediate position is a current value corresponding to a closed position of the flow electromagnetic valve; and a determination module configured to, when an absolute value of a movement speed of a shift fork of the hybrid transmission is greater than a target movement speed, determine a current of the flow electromagnetic valve as an opening current of the flow electromagnetic valve learned this time.

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

[0021] In a fourth aspect, the application provides a computer readable storage medium, and the computer readable storage medium stores instructions, and the instructions make a computer execute the method according to any one of the first aspect when running on the computer.

[0022] In a fifth aspect, the application provides a computer program product, and the computer program product makes a computer execute the method according to any one of the first aspect when running on the computer.

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

[0024] In order to make the above-mentioned purposes, features and advantages of the application more obvious and easy to understand, the following preferred embodiments are specifically described, and the accompanying drawings are described in detail as follows. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments of the application. It should be understood that the following drawings only show some embodiments of the application, and therefore should not be regarded as a limitation on the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor.

[0026] Figure 1 A flowchart of a flow electromagnetic valve opening current learning method provided for an embodiment of the present application;

[0027] Figure 2 A schematic diagram of a typical application scenario of a flow electromagnetic valve as a yoke action execution component provided for an embodiment of the present application;

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

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

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

[0031] The technical solutions in the embodiments of the present application will be described below with reference to 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, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. Meanwhile, in the description of the present application, the terms “first”, “second” and the like are only used for distinguishing description, and cannot be understood as indicating or implying relative importance.

[0033] As described in the background, in the related art, there is a problem that the low-speed control of the yoke of the hybrid transmission is difficult, and the gear engagement end impact or gear disengagement failure is prone to occur. Based on this, the embodiments of the present application provide a flow electromagnetic valve opening current learning scheme to solve the above problems.

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

[0035] As shown in the background, Figure 1 Figure 1 ​is a flowchart of a flow electromagnetic valve opening current learning method provided by an embodiment of the present application. The method can be applied to a controller on a vehicle, such as a vehicle control unit (VCU), a domain controller unit (DCU), and the like. The vehicle is equipped with a hybrid transmission. In the embodiment, the controller learns the opening current of a flow electromagnetic valve in the hybrid transmission during actual vehicle operation, and then accurately controls the flow of the flow electromagnetic valve according to the learned value. The flow electromagnetic valve can be a QPV electromagnetic valve, which is a flow electromagnetic valve whose output is proportional to the control input. Of course, the flow electromagnetic valve can also be other types of flow electromagnetic valves.

[0036] The method comprises:

[0037] In step 101, the current operating state of the vehicle is obtained, and it is determined whether the vehicle meets a preset learning activation condition according to the operating state. The operating state includes the vehicle speed and the working state of the hybrid transmission of the vehicle.

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

[0039] In some embodiments, the preset learning activation condition mentioned in this step can include that the vehicle speed exceeds a first speed value and the duration exceeds a target time; the hybrid transmission is not faulty; the hybrid transmission is in parallel mode; the state of the shift fork is in gear state and the duration exceeds the target time; the oil temperature of the hybrid transmission is higher than a first temperature value and the duration exceeds the target time; the pressure of the hybrid transmission exceeds a first pressure value and the duration exceeds the target time; and the number of continuous learning of the opening current of the flow electromagnetic valve does not exceed a target number.

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

[0041] Step 102, in the case where the vehicle meets preset learning activation conditions, controlling the current of the flow electromagnetic valve to change from an absolute intermediate position at a target change rate according to the current gear; the absolute intermediate position is a current value corresponding to the closed position of the flow electromagnetic valve;

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

[0043] In some embodiments, the controlling the current of the flow electromagnetic valve to change from the absolute intermediate position at the target change rate according to the current gear mentioned in this step can include: if the current gear is one gear, gradually increasing the current of the flow electromagnetic valve from the absolute intermediate position at the target change rate; if the current gear is two gears, gradually reducing the current of the flow electromagnetic valve from the absolute intermediate position at the target change rate. That is, the controller adopts different learning actions according to the current gear, if the current gear is one gear, the controller commands the current of the flow electromagnetic valve to gradually increase from the absolute intermediate position according to a fixed current change gradient, and if the current gear is two gears, the controller commands the current of the flow electromagnetic valve to gradually decrease from the absolute intermediate position according to a fixed current change gradient. The target change rate can be 20 mA / s. In this way, the fork is pushed to the end position with a small current change gradient, which improves the accuracy of the opening current learning value to some extent.

[0044] Step 103, when the absolute value of the movement speed of the fork of the hybrid transmission is greater than the target movement speed, determining the current of the flow electromagnetic valve as the opening current of the flow electromagnetic valve learned this time.

[0045] In the embodiment, after the learning function is activated, the controller controls the current of the flow electromagnetic valve to be at the absolute middle position, and pushes the shift fork to the end position with a small current change gradient. When a slight movement speed of the shift fork is detected, it is determined that the flow electromagnetic valve is opened, and the current is the opening current of the flow electromagnetic valve, thereby completing the learning of the opening current of the flow electromagnetic valve. In this way, based on the learning value, the controller can accurately identify the characteristics of the flow electromagnetic valve, thereby reducing the difficulty of low-speed control of the shift fork and effectively reducing the phenomenon of end impact or failure to shift out of the gear. The target movement speed mentioned in this step can be set according to the detection accuracy of the sensor for detecting the movement speed of the shift fork. Optionally, the target movement speed can be 5 mm / s.

[0046] In some embodiments, the current of the flow electromagnetic valve is determined as the opening current of the flow electromagnetic valve learned this time in this step can include: if the current gear is one gear, the current of the flow electromagnetic valve is determined as the positive flow opening current of the flow electromagnetic valve learned this time; if the current gear is two gears, the current of the flow electromagnetic valve is determined as the negative flow opening current of the flow electromagnetic valve learned this time. That is, taking the target movement speed of 5 mm / s as an example, when the learning function is activated, if the current gear is one gear and the movement speed of the shift fork is greater than 5 mm / s, it is considered that the current command current is the positive flow opening current; if the current gear is two gears and the movement speed of the shift fork is less than -5 mm / s, it is considered that the current command current is the negative flow opening current. In this way, the positive flow opening current and the negative flow opening current of the flow electromagnetic valve are learned.

[0047] In some embodiments, further comprising: when the current of the flow electromagnetic valve is greater than a first current value or the current of the flow electromagnetic valve is less than a second current value, exiting the learning of the opening current of the flow electromagnetic valve this time. That is, when the learning function is activated, if the current gear is one gear, the controller controls the current of the flow electromagnetic valve to gradually increase from the absolute middle position until the current of the flow electromagnetic valve is the first current value; if the current gear is two gears, the controller controls the current of the flow electromagnetic valve to gradually decrease from the absolute middle position until the current of the flow electromagnetic valve is the second current value. When the current of the flow electromagnetic 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 at the limit position, at which the controller exits the learning, thereby reducing the waste of resources consumed by learning. The first current value and the second current value can be set according to the absolute middle position of the flow electromagnetic valve and the needs of specific scenarios. Optionally, when the absolute middle position is 750 mA, the first current value can be 1200 mA, and the second current value can be 300 mA.

[0048] Further, in some embodiments, further comprising: monitoring the running state of the vehicle in real time during the process of changing the current of the flow electromagnetic valve from the absolute intermediate position at the target change rate according to the current gear; and if it is determined according to the monitoring result that the vehicle satisfies any one of the preset learning exit conditions, exiting the current learning of the opening current of the flow electromagnetic valve: the vehicle speed is lower than a second speed value; the hybrid transmission fails; the hybrid transmission is in a non-parallel mode; the shift fork has a demand for gear shifting; the oil temperature of the hybrid transmission is lower than a second temperature value; and the pressure of the hybrid transmission is lower than a second pressure value. That is, during the learning process, the controller monitors the running state of the vehicle in real time, and when the vehicle satisfies any one of the 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 electromagnetic valve. Optionally, the second speed value can be 30 km / h; the second temperature value can be 20°C; and the second pressure value can be 8 bar. Through this setting, the learning of the opening current of the flow electromagnetic valve can be exited at an appropriate time, thereby effectively reducing the waste of resource consumption.

[0049] In the embodiments of the present application, whether the vehicle satisfies the preset learning activation condition is determined according to the current vehicle speed and the working state of the hybrid transmission, and when the vehicle satisfies the preset learning activation condition, the current of the flow electromagnetic valve is controlled to be at the absolute intermediate position, and the shift fork is pushed to the end position at 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 is determined that the flow electromagnetic valve is opened and has a flow. At this time, the current of the flow electromagnetic valve is determined as the opening current of the flow electromagnetic valve learned this time. In this way, based on the learned opening current, the controller can accurately identify the characteristics of the flow electromagnetic valve, thereby reducing the difficulty of low-speed control of the shift fork and effectively reducing the phenomenon of gear shifting end impact or gear shifting failure.

[0050] In order to make a more detailed description of the scheme of the present application, a specific embodiment will be introduced as follows:

[0051] The embodiments provide a learning scheme of the opening current of the flow electromagnetic valve of the hybrid transmission. As shown in Figure 2 , Figure 2 is a schematic diagram of a typical application scene in which the flow electromagnetic valve is used as a shift fork action execution component, and the hybrid transmission shown includes a position sensor 21, a combination of a piston and a shift fork 22, a flow electromagnetic valve 23, a main oil pressure reducing component 24, and an oil filter component 25, wherein the flow electromagnetic valve 23 is a QPV electromagnetic valve. In some scenes, the QI characteristics of the QPV electromagnetic valve are as shown in Figure 3The first characteristic point 31 is (900 mA, 0 mL / min), and the second characteristic point 32 is (600 mA, 0 mL / min), that is, when the electromagnetic valve current is in the range of 750 mA±150 mA, the electromagnetic valve is closed, and no flow passes through; when the electromagnetic valve current is greater than 900 mA, the right opening of the electromagnetic valve is opened, the flow passes through the electromagnetic valve and is injected into the right oil chamber of the shift drum piston, the piston moves to the left, and the first gear can be engaged or the second gear can be disengaged; when the electromagnetic valve current is less than 600 mA, the right opening of the electromagnetic valve is opened, the flow passes through the electromagnetic valve and is injected into the left oil chamber of the shift drum piston, the piston moves to the right, and the second gear can be engaged or the first gear can be disengaged. However, due to manufacturing errors and wear, the above two characteristic points differ on different components, which makes it difficult to control the shift drum at low speed, and the gear engagement end impact or gear disengagement failure is prone to occur. However, the embodiment can effectively solve the above problems by self-learning the opening current of the flow electromagnetic valve.

[0052] The embodiment includes the following workflow:

[0053] S201, learning action activation condition design;

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

[0055] Working condition one: the current shift drum is in the engaged state, and the maintenance time is more than 1s;

[0056] Working condition two: the current transmission oil temperature is higher than 30℃, and the maintenance time is more than 1s;

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

[0058] Working condition four: the current system pressure is more than 10 bar, and the maintenance time is more than 1s;

[0059] Working condition five: the current vehicle speed is more than 50kph, and the maintenance time is more than 1s;

[0060] Working condition six: the current electromagnetic valve opening current continuous learning times is not more than 2 times;

[0061] S202, learning action exit condition design;

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

[0063] Exit condition one: the current shift drum has gear disengagement demand;

[0064] Exit condition two: The current transmission oil temperature is below 20°C;

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

[0066] Exit condition four: The current system pressure is below 8 bar;

[0067] Exit condition five: Current vehicle speed is below 30 kph;

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

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

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

[0074] If the current gear is second gear, the solenoid valve current is commanded to gradually decrease from 750mA at a rate 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 first gear and the shift fork movement speed is greater than 5mm / s, the current command current is considered to be a positive flow start current; if the current gear is second gear and the shift fork movement speed is less than -5mm / s, the current command current is considered to be a negative flow start current.

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

[0078] Corresponding to the embodiments of the aforementioned methods, this application also provides embodiments of a flow solenoid valve opening current learning device and a terminal thereof:

[0079] like Figure 4 As shown, Figure 4 This is a block diagram of a flow solenoid valve opening current learning device provided in an embodiment of this application. The device includes:

[0080] The acquisition module 41 is configured to acquire a current operating state of the vehicle, and determine whether the vehicle meets a preset learning activation condition according to the operating state; the operating state includes a vehicle speed and a working state of a hybrid transmission of the vehicle;

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

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

[0083] The functions and effects of the modules in the above device are specifically described in the implementation process of the corresponding steps in the above method, and will not be repeated here.

[0084] The application also provides an electronic device, please see Figure 5 , Figure 5 The application provides a structural block diagram of an electronic device. The electronic device can 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 the direct connection and communication of the components. The communication interface 520 of the electronic device in the application is used for signaling or data communication with other node devices. The processor 510 can be an integrated circuit chip with signal processing capability.

[0085] The processor 510 described 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 ready-to-program gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. It can implement or execute the disclosed methods, steps and logic block diagrams in the application embodiments. The general-purpose processor can be a microprocessor or the processor 510 can also be any conventional processor.

[0086] The memory 530 can 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 electrically erasable programmable read-only memory (EEPROM), etc. The memory 530 stores computer readable instructions which, when executed by the processor 510, enable the electronic device to perform the above-mentioned Figure 1 The method embodiments relate to each step.

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

[0088] The memory 530, the storage controller, the processor 510, the peripheral interface, and the input / output unit are electrically connected to each other directly or indirectly to achieve data transmission or interaction. For example, these elements can be electrically connected to each other through one or more communication buses 540. The processor 510 is configured 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 / output unit is configured to provide a user with a creation task and create an optional time period or a preset execution time for the task to achieve user interaction with a server. The input / output unit can be, but is not limited to, a mouse, a keyboard, etc.

[0090] It can be understood that Figure 5 The structure shown is only schematic, and the electronic device can include more or fewer components than those shown in the figures, or have a different configuration from that shown in the figures. Figure 5 The components shown in the figures can be implemented in hardware, software, or a combination thereof. Figure 5 The components shown in the figures can be implemented in hardware, software, or a combination thereof. Figure 5 The components shown in the figures can be implemented in hardware, software, or a combination thereof.

[0091] The embodiments of the present application also provide a storage medium, which stores instructions. When the instructions are run on a computer, the computer program is executed by a processor to implement the method of the method embodiments. To avoid repetition, this will not be repeated here.

[0092] The present application also provides a computer program product, which, when run on a computer, causes the computer to execute the method of the method embodiments.

[0093] In several embodiments provided in the present application, it should be understood that the disclosed apparatus and method can also be implemented by other means. The apparatus embodiments described above are only illustrative, for example, the flowcharts and block diagrams in the drawings show the possible implementation architecture, function and operation of the apparatus, method and computer program product according to the embodiments of the present application. In this regard, each block in the flowchart or block diagram can represent a module, a program segment or a part of code, which contains one or more executable instructions for implementing the specified logic function. It should also be noted that in some alternative implementations, the functions noted in the blocks can occur in different order from that shown in the drawings. For example, two consecutive blocks can actually be executed substantially in parallel, and sometimes they can be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagram and / or flowchart, and the combination of blocks in the block diagram and / or flowchart, can be implemented by a dedicated hardware-based system for executing the specified functions or actions, or can be implemented by a combination of dedicated hardware and computer instructions.

[0094] In addition, the functional modules in the various embodiments of the present application can be integrated together to form an independent part, or each module can exist independently, or two or more modules can 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 solutions of the present application can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, and various media that can store program codes.

[0096] The above merely provides an example of the present application and is not intended to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and thus, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings.

[0097] The above merely provides an example of the present application and is not intended to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and thus, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings.

[0098] It should be noted that the relational terms herein such as first and second and the like are used solely to distinguish one from another entity or action without necessarily requiring or implying any actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

Claims

1. A flow electromagnetic valve opening current learning method characterized by comprising: The method comprises the following steps: acquiring the current running state of the vehicle, and determining whether the vehicle meets the preset learning activation condition according to the running state; the running state comprises the vehicle speed and the working state of the hybrid transmission of the vehicle; in the case where the vehicle meets the preset learning activation condition, the current of the flow electromagnetic valve is controlled to change from the absolute intermediate position at a target change rate according to the current gear; the absolute intermediate position is the current value corresponding to the closed position of the flow electromagnetic valve; if the current gear is first gear, the current of the flow electromagnetic valve is gradually increased from the absolute intermediate position at the target change rate; if the current gear is second gear, the current of the flow electromagnetic valve is gradually decreased from the absolute intermediate position at the target change rate; 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 of the flow electromagnetic valve is determined as the opening current of the flow electromagnetic valve learned this time.

2. The method of claim 1, wherein, the preset learning activation condition comprises: the vehicle speed is greater than the first speed value, and the duration is greater than the target time; the hybrid transmission is fault-free; the hybrid transmission is in parallel mode; the state of the shift fork is in-gear state, and the duration is greater than the target time; the oil temperature of the hybrid transmission is higher than the first temperature value, and the duration is greater than the target time; the pressure of the hybrid transmission is greater than the first pressure value, and the duration is greater than the target time; and the number of continuous learning of the opening current of the flow electromagnetic valve is not more than the target number.

3. The method of claim 1, wherein, Further comprising: when the current of the flow electromagnetic valve is greater than the first current value, or the current of the flow electromagnetic valve is less than the second current value, exit this time of learning the opening current of the flow electromagnetic valve.

4. The method of claim 3, wherein, Further comprising: in the process of controlling the current of the flow electromagnetic valve to change from the absolute intermediate position at the target change rate according to the current gear, the running state of the vehicle is monitored in real time; if it is determined according to the monitoring result that the vehicle meets any one of the following preset learning exit conditions, exit this time of learning the opening current of the flow electromagnetic valve: the vehicle speed is lower than the second speed value; the hybrid transmission has a fault; the hybrid transmission is in non-parallel mode; the shift fork has a gear shifting demand; 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.

5. The method of claim 1, wherein, the current of the flow electromagnetic valve is determined as the opening current of the flow electromagnetic valve learned this time, comprising: if the current gear is first gear, the current of the flow electromagnetic valve is determined as the positive flow opening current of the flow electromagnetic valve learned this time; if the current gear is second gear, the current of the flow electromagnetic valve is determined as the negative flow opening current of the flow electromagnetic valve learned this time.

6. The method of claim 3, wherein, the absolute intermediate 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.

7. A flow solenoid valve opening current learning device, characterized in that, The method comprises the following steps: an acquisition module is configured 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 comprises the vehicle speed and the working state of the hybrid transmission of the vehicle; The control module is configured to control the current of the flow electromagnetic valve to change from the absolute intermediate position at a target change rate when the vehicle meets a preset learning activation condition; the absolute intermediate position is a current value corresponding to a closed position of the flow electromagnetic valve; if the current gear is a first gear, the current of the flow electromagnetic valve is gradually increased from the absolute intermediate position at the target change rate; if the current gear is a second gear, the current of the flow electromagnetic valve is gradually decreased from the absolute intermediate position at the target change rate. The determination module is configured to determine the current of the flow electromagnetic valve as the opening current of the flow electromagnetic valve learned this time when the absolute value of the movement speed of the shift fork of the hybrid transmission is greater than a target movement speed.

8. A computer-readable storage medium, characterized in that, A computer program is stored on the computer readable medium, and the computer program is executed by a processor to implement the method according to any one of claims 1 to 6.

9. An electronic device, comprising: A computer program is stored on the computer readable medium, and the computer program is executed by a processor to implement the method according to any one of claims 1 to 6.

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