Control method, device, vehicle and storage medium of hydraulic system solenoid valve

Abstract

The present invention discloses a control method, device, vehicle and storage medium for a solenoid valve of a hydraulic system, wherein the control method for the solenoid valve of a hydraulic system comprises: obtaining the current working condition data of the hydraulic system in response to the control instruction of the hydraulic system, wherein the current working condition data is used to characterize the current state of the hydraulic system; determining the first output flow of the solenoid valve according to the control instruction and the current working condition data, wherein the first output flow is a calibrated output flow; obtaining the solenoid valve parameters, the hydraulic oil density and the power unit pressure; determining the flow compensation value according to the solenoid valve parameters, the hydraulic oil density and the power unit pressure; determining the target output flow according to the flow compensation value and the first output flow. The present invention solves the technical problem that the control of the output flow of the solenoid valve is not accurate enough when the solenoid valve is controlled by unified standard calibration data.

Description

Technical Field

[0001] The present invention relates to the field of automobile technology, and in particular to a control method, a device, a vehicle and a storage medium for a solenoid valve of a hydraulic system. Background Art

[0002] The hydraulic control system of a dual clutch transmission (DCT) generally includes a main oil control circuit, a clutch control circuit, a clutch lubrication circuit, and a shift control circuit. The main oil control circuit includes a solenoid valve for controlling the flow of hydraulic oil, which is generally controlled based on standard calibration data preset in the controller.

[0003] However, the solenoid valves in the hydraulic system have different control requirements at different operating points. Using uniform standard calibration data to control the solenoid valves will result in inaccurate control of the output flow of the solenoid valves. Summary of the invention

[0004] The embodiments of the present invention provide a control method, device, vehicle and storage medium for a solenoid valve of a hydraulic system, so as to at least solve the technical problem that the control of the output flow of the solenoid valve by using unified standard calibration data will result in inaccurate control.

[0005] According to a first aspect of an embodiment of the present invention, a method for controlling a solenoid valve of a hydraulic system is provided, comprising:

[0006] In response to a control instruction of the hydraulic system, current operating condition data of the hydraulic system is obtained, wherein the current operating condition data is used to characterize the current state of the hydraulic system; a first output flow of the solenoid valve is determined according to the control instruction and the current operating condition data, wherein the first output flow is a calibrated output flow; solenoid valve parameters, hydraulic oil density, and power unit pressure are obtained; a flow compensation value is determined according to the solenoid valve parameters, hydraulic oil density, and power unit pressure; and a target output flow is determined according to the flow compensation value and the first output flow.

[0007] Optionally, the current operating condition data includes oil temperature and current output flow of the solenoid valve.

[0008] Optionally, determining the first output flow of the solenoid valve according to the control instruction and the current operating condition data includes: according to the control instruction and the current operating condition data, querying a preset flow calibration table to determine the first output flow.

[0009] Optionally, the solenoid valve parameters include: valve port flow coefficient, valve port working chamber area gradient, valve core displacement, valve port inlet pressure and valve port outlet pressure.

[0010] Optionally, determining the flow compensation value according to the solenoid valve parameters, the hydraulic oil density and the power unit pressure includes: determining a first sub-compensation value using a first preset formula according to the valve port flow coefficient, the valve port working chamber area gradient, the valve core displacement, the hydraulic oil density, the valve port inlet pressure and the valve port outlet pressure; determining a second sub-compensation value using a second preset formula according to the valve port flow coefficient, the valve port working chamber area gradient, the valve core displacement, the hydraulic oil density, the valve port inlet pressure and the valve port outlet pressure; determining the flow compensation value according to the first sub-compensation value and the second sub-compensation value.

[0011] Optionally, determining the target output flow rate according to the flow compensation value and the first output flow rate includes: summing the first output flow rate and the flow compensation value to determine the target output flow rate.

[0012] Optionally, the control method of the solenoid valve of the hydraulic system also includes: determining the solenoid valve control current according to the target output flow to complete the control of the solenoid valve.

[0013] According to a second aspect of an embodiment of the present invention, there is also provided a control device for a solenoid valve of a hydraulic system, comprising:

[0014] A first acquisition module, the first acquisition module is used to respond to the control instruction of the hydraulic system and acquire the current working condition data of the hydraulic system, wherein the current working condition data is used to characterize the current state of the hydraulic system; a first determination module, the first determination module is used to determine the first output flow of the solenoid valve according to the control instruction and the current working condition data, wherein the first output flow is a calibrated output flow; a second acquisition module, the second acquisition module is used to acquire the solenoid valve parameters, the hydraulic oil density, and the power unit pressure; a second determination module, the second determination module is used to determine the flow compensation value according to the solenoid valve parameters, the hydraulic oil density and the power unit pressure; a third determination module, the third determination module is used to determine the target output flow according to the flow compensation value and the first output flow.

[0015] Optionally, the current operating condition data acquired by the first acquisition module includes oil temperature and current output flow of the solenoid valve.

[0016] Optionally, the first determination module is further used to: query a preset flow calibration table to determine the first output flow according to the control instruction and current operating condition data.

[0017] Optionally, the solenoid valve parameters acquired by the second acquisition module include: valve port flow coefficient, valve port working chamber area gradient, valve core displacement, valve port inlet pressure and valve port outlet pressure.

[0018] Optionally, the second determination module is also used to: determine the first sub-compensation value using a first preset formula according to the valve flow coefficient, the valve working chamber area gradient, the valve core displacement, the hydraulic oil density, the valve inlet pressure and the valve outlet pressure; determine the second sub-compensation value using a second preset formula according to the valve flow coefficient, the valve working chamber area gradient, the valve core displacement, the hydraulic oil density, the valve inlet pressure and the valve outlet pressure; determine the flow compensation value according to the first sub-compensation value and the second sub-compensation value.

[0019] Optionally, the third determination module is further used to: sum the first output flow and the flow compensation value to determine the target output flow.

[0020] Optionally, the control device of the solenoid valve of the hydraulic system further includes a control module, and the control module is used to determine the solenoid valve control current according to the target output flow to complete the control of the solenoid valve.

[0021] According to a third aspect of an embodiment of the present invention, a vehicle is also provided, the vehicle comprising a memory and a processor, the memory storing a computer program, and the processor being configured to run the computer program to execute the control method of the hydraulic system solenoid valve in any one of the above-mentioned first aspects.

[0022] According to a fourth aspect of an embodiment of the present invention, a non-volatile storage medium is also provided, in which a computer program is stored, wherein the computer program is configured to execute the control method of the hydraulic system solenoid valve in any one of the above-mentioned first aspects when running on a computer or a processor.

[0023] In an embodiment of the present invention, first respond to the control instruction of the hydraulic system, obtain the current working condition data of the hydraulic system, wherein the current working condition data is used to characterize the current state of the hydraulic system, then determine the first output flow of the solenoid valve according to the control instruction and the current working condition data, wherein the first output flow is the calibrated output flow, then obtain the solenoid valve parameters, hydraulic oil density, and power unit pressure, then determine the flow compensation value according to the solenoid valve parameters, hydraulic oil density, and power unit pressure, and finally determine the target output flow according to the flow compensation value and the first output flow. By compensating the calibrated output flow and completing the subsequent control of the solenoid valve according to the target output flow obtained by compensation, the technical problem that the output flow of the solenoid valve is not accurately controlled when the solenoid valve is controlled by using unified standard calibration data can be solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0025] Figure 1is a flow chart of a method for controlling a solenoid valve of a hydraulic system according to one embodiment of the present invention;

[0026] Figure 2 is a schematic diagram of a hydraulic system provided according to one embodiment of the present invention;

[0027] Figure 3 1 is a structural block diagram of a control device for a solenoid valve of a hydraulic system according to one embodiment of the present invention. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0029] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0030] According to an embodiment of the present invention, an embodiment of a control method for a solenoid valve of a hydraulic system is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system containing at least one set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0031] The method embodiment can also be executed in an electronic device including a memory and a processor, a similar control device or a vehicle-mounted terminal. Taking a vehicle-mounted terminal as an example, the vehicle-mounted terminal may include one or more processors and a memory for storing data. Optionally, the vehicle-mounted terminal may also include a communication device and a display device for communication functions. It can be understood by those of ordinary skill in the art that the above structural description is only illustrative and does not limit the structure of the vehicle-mounted terminal. For example, the vehicle-mounted terminal may also include more or fewer components than the above structural description, or have a configuration different from the above structural description.

[0032] The processor may include one or more processing units. For example, the processor may include a central processing unit (CPU), a graphics processing unit (GPU), a digital signal processing (DSP) chip, a microcontroller unit (MCU), a field-programmable gate array (FPGA), a neural network processor (NPU), a tensor processing unit (TPU), an artificial intelligence (AI) type processor, and the like. Among them, different processing units may be independent components or integrated into one or more processors. In some instances, the electronic device may also include one or more processors.

[0033] The memory can be used to store computer programs, such as storing a computer program corresponding to the control method of the hydraulic system solenoid valve in the embodiment of the present invention. The processor implements the control method of the hydraulic system solenoid valve by running the computer program stored in the memory. The memory may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory may further include a memory remotely arranged relative to the processor, and these remote memories may be connected to the electronic device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0034] The communication device is used to receive or send data via a network. The specific examples of the above-mentioned network may include a wireless network provided by a communication provider of the mobile terminal. In one example, the communication device includes a network adapter (network interface controller, NIC), which can be connected to other network devices through a base station so as to communicate with the Internet. In one example, the communication device can be a radio frequency (radio frequency, RF) module, which is used to communicate with the Internet wirelessly. In some embodiments of the present solution, the communication device is used to connect to mobile devices such as mobile phones and tablets, and instructions can be sent to the vehicle-mounted terminal through the mobile device.

[0035] The display device may be, for example, a touch screen type liquid crystal display (LCD) and a touch display (also referred to as a "touch screen" or "touch display screen"). The liquid crystal display may enable a user to interact with a user interface of the vehicle-mounted terminal. In some embodiments, the vehicle-mounted terminal has a graphical user interface (GUI), and a user may interact with the GUI by finger contact and / or gestures on a touch-sensitive surface. The human-computer interaction function here may include a vehicle gear shifting function, and executable instructions for executing the human-computer interaction function are configured / stored in a computer program product or a readable storage medium executable by one or more processors.

[0036] Figure 1 FIG. 1 is a flow chart of a method for controlling a solenoid valve of a hydraulic system according to one embodiment of the present invention. Figure 1 As shown, the method can be applied to a vehicle, and the hydraulic system can be a hydraulic control system of a dual-clutch automatic transmission, comprising the following steps:

[0037] Step S101, in response to a control instruction of the hydraulic system, obtaining current working condition data of the hydraulic system.

[0038] Among them, the current working condition data is used to characterize the current state of the hydraulic system.

[0039] Specifically, the control instructions include but are not limited to shift instructions and clutch state switching instructions. When the dual-clutch automatic transmission hydraulic control system receives the control instruction, it first obtains the current working condition data of the hydraulic system, which is the basis for the hydraulic system to perform subsequent actions.

[0040] Optionally, in some embodiments of the present invention, the current working condition data includes oil temperature and current output flow of the solenoid valve. The oil temperature is the temperature of the hydraulic oil in the hydraulic system, and the solenoid valve refers to the solenoid valve that controls the flow of the hydraulic oil in the hydraulic system.

[0041] Step S102, determining the first output flow of the solenoid valve according to the control instruction and the current working condition data.

[0042] The first output flow is a calibrated output flow.

[0043] Specifically, the calibrated output flow has a preset corresponding relationship with the control instruction and the current operating condition data. After the control instruction and the current operating condition data are obtained, the first output flow can be directly determined according to the control instruction and the current operating condition data.

[0044] It should be noted that the vehicle controller only writes the calibration data of the solenoid valve under the preset standard operating point. The calibrated output flow corresponding to the operating point not written in the controller is obtained by the first compensation based on the data corresponding to the standard operating point. The compensation value of the first compensation is to test the output flow and pressure of the solenoid valve under different working conditions, perform data statistics on the test results, and generate a compensation value based on the standard working condition data. The compensation value obtained only by statistics is not accurate enough, so the first output flow is not accurate enough.

[0045] It should be noted that the calibration data of the solenoid valve at the preset standard operating point written into the above controller is obtained by the solenoid valve manufacturer through batch calibration of the solenoid valve, and the influence of the characteristics of each valve body on the output flow is not considered.

[0046] Step S103, obtaining solenoid valve parameters, hydraulic oil density, and power unit pressure.

[0047] Specifically, the power unit is a unit for supplying oil in a hydraulic system, and may include an oil tank, an oil pump, an accumulator, and an oil supply circuit. The power unit pressure is the oil pressure of the oil supply circuit in the power unit.

[0048] Step S104, determining a flow compensation value according to the solenoid valve parameters, the hydraulic oil density and the power unit pressure.

[0049] Specifically, the flow compensation value can be calculated using a preset formula, with the solenoid valve parameters, hydraulic oil density and power unit pressure serving as parameters of the preset formula, and the flow compensation value serving as an output result of the preset formula.

[0050] It should be noted that the electromagnetic valve parameters and the hydraulic oil density are used as parameters of the preset formula, and the inherent characteristics of the electromagnetic valve and the inherent characteristics of the hydraulic oil are taken into consideration.

[0051] Step S105, determining the target output flow rate according to the flow compensation value and the first output flow rate.

[0052] Specifically, the second output flow obtained by compensating with the flow compensation value takes into account the inherent characteristics of the solenoid valve and the hydraulic oil, and is more accurate than the first output flow.

[0053] It should be noted that the above-mentioned control method of the solenoid valve of the hydraulic system can also be extended to be applied to small hydraulic control systems other than transmissions.

[0054] In an embodiment of the present invention, first respond to the control instruction of the hydraulic system, obtain the current working condition data of the hydraulic system, wherein the current working condition data is used to characterize the current state of the hydraulic system, then determine the first output flow of the solenoid valve according to the control instruction and the current working condition data, wherein the first output flow is the calibrated output flow, then obtain the solenoid valve parameters, hydraulic oil density, and power unit pressure, then determine the flow compensation value according to the solenoid valve parameters, hydraulic oil density, and power unit pressure, and finally determine the target output flow according to the flow compensation value and the first output flow. By compensating the calibrated output flow and completing the subsequent control of the solenoid valve according to the target output flow obtained by compensation, the technical problem that the output flow of the solenoid valve is not accurately controlled when the solenoid valve is controlled by using unified standard calibration data can be solved.

[0055] Optionally, in some embodiments of the present invention, determining the first output flow of the solenoid valve according to the control instruction and the current operating data includes: querying a preset flow calibration table to determine the first output flow according to the control instruction and the current operating data.

[0056] Specifically, in the preset calibration flow table, two data, the control instruction and the current operating condition data, determine a first output flow.

[0057] It should be noted that in the preset calibration flow table, only the output flow corresponding to the preset standard operating point is the calibration data, and the output flow corresponding to the other operating points is the output flow after the first compensation based on the output flow corresponding to the standard operating point. The compensation value used in the first compensation is the preset compensation value.

[0058] Optionally, the solenoid valve parameters include: valve port flow coefficient, valve port working chamber area gradient, valve core displacement, valve port inlet pressure and valve port outlet pressure.

[0059] It should be noted that the valve port flow coefficient is an indicator for evaluating the flow capacity of the valve. The larger the flow coefficient, the smaller the pressure loss when the fluid flows through the valve. The valve port working cavity area gradient indicates the rate of change of the valve port flow area with the displacement of the valve core.

[0060] Optionally, in step S104, determining the flow compensation value according to the solenoid valve parameters, the hydraulic oil density and the power unit pressure includes:

[0061] Step S1041, determining a first sub-compensation value using a first preset formula according to the valve port flow coefficient, the valve port working chamber area gradient, the valve core displacement, the hydraulic oil density, the valve port inlet pressure and the valve port outlet pressure.

[0062] Specifically, the first preset formula is as follows:

[0063] Q1=

C V WX v (2(P2-P1) / ρ) 1 / 2 -Q e

[0064] Among them, Q1 is the first sub-compensation value, C V is the valve port flow coefficient, W is the valve port working chamber area gradient, X v is the valve core displacement, P1 is the valve outlet pressure, P2 is the valve inlet pressure, Q e is the preset compensation value and a is the compensation coefficient.

[0065] It should be noted that the preset compensation value is a compensation value based on the standard working condition data generated by testing the output flow and pressure of the solenoid valve under different working conditions and statistically analyzing the test results. The corresponding relationship table between the compensation coefficient and the current working condition data is preset in the vehicle controller, and the compensation coefficient is determined by looking up the table based on the current working condition data. Different working condition data determines different compensation coefficients.

[0066] Step S1042, determining a second sub-compensation value using a second preset formula according to the valve port flow coefficient, the valve port working chamber area gradient, the valve core displacement, the hydraulic oil density, the valve port inlet pressure and the valve port outlet pressure.

[0067] Specifically, the second preset formula is as follows:

[0068] Q2=C V WX v (ρ / 2) 1 / 2 ((P S -P1) 1 / 2 +P2 1 / 2 )

[0069] Among them, Q2 is the second sub-compensation value, C V is the valve port flow coefficient, W is the valve port working chamber area gradient, X v is the valve core displacement, P1 is the valve outlet pressure, P2 is the valve inlet pressure, P S is the power unit pressure.

[0070] Step S1043: determining a flow compensation value according to the first sub-compensation value and the second sub-compensation value.

[0071] Specifically, the flow compensation value is the sum of the first sub-compensation value and the second sub-compensation value.

[0072] Optionally, determining the target output flow rate according to the flow compensation value and the first output flow rate includes: summing the first output flow rate and the flow compensation value to determine the target output flow rate.

[0073] Specifically, the target output flow obtained by adding the flow compensation value to the first output flow is the flow that the solenoid valve needs to output under the current working condition.

[0074] Optionally, the control method of the solenoid valve of the hydraulic system also includes: determining the solenoid valve control current according to the target output flow to complete the control of the solenoid valve.

[0075] Specifically, after the target output flow is obtained, the solenoid valve control current is determined according to the target output flow. The solenoid valve control current can control the valve core of the solenoid valve to move to complete the control of the solenoid valve, so that the output flow of the solenoid valve is the target output flow.

[0076] Reference Figure 2 , Figure 2 This is a schematic diagram of a hydraulic system provided according to one embodiment of the present invention, and the hydraulic system includes an oil tank, a motor, a motor cooler, an electric pump, a mechanical oil pump, a main oil circuit pressure regulating valve, a flow regulating valve, an oil shower, a dual clutch transmission cooler, a dual clutch cooling or lubrication circuit, and a separation clutch cooling or lubrication circuit. When the hydraulic system is working, the motor starts, and the motor cooler is used to cool the motor. At the same time, the electric pump and the mechanical oil pump start working to pressurize the entire hydraulic system. The hydraulic oil flows to the flow regulating valve through the dual clutch cooling or lubrication circuit and the separation clutch cooling or lubrication circuit, and after being regulated by the flow regulating valve, it flows to the main oil circuit pressure regulating valve, and finally flows to the clutch for cooling and lubricating the clutch. The oil shower and the dual clutch transmission cooler are conventional settings for the vehicle transmission hydraulic system.

[0077] It should be noted that the hydraulic system solenoid valve control method provided by the present invention can be used for Figure 2 Flow regulating valve in the hydraulic system.

[0078] Through the description of the above implementation methods, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course can also be implemented by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, a magnetic disk, or an optical disk), and includes a number of instructions for enabling a terminal device (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present invention.

[0079] In this embodiment, a control device for a solenoid valve of a hydraulic system is also provided, and the device is used to implement the above-mentioned embodiments and preferred implementation modes, and the descriptions that have been made are not repeated here. As used below, the term "module" can be a combination of software and / or hardware that implements a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and conceivable.

[0080] Figure 3 is a structural block diagram of a control device 200 for a solenoid valve of a hydraulic system according to one embodiment of the present invention. Figure 3 As shown, a control device 200 for a solenoid valve of a hydraulic system is exemplified, and the device includes: a first acquisition module 201, the first acquisition module 201 is used to respond to a control instruction of the hydraulic system and acquire current working condition data of the hydraulic system, wherein the current working condition data is used to characterize the current state of the hydraulic system; a first determination module 202, the first determination module 202 is used to determine a first output flow of the solenoid valve according to the control instruction and the current working condition data, wherein the first output flow is a calibrated output flow; a second acquisition module 203, the second acquisition module 203 is used to acquire solenoid valve parameters, hydraulic oil density, and power unit pressure; a second determination module 204, the second determination module 204 is used to determine a flow compensation value according to the solenoid valve parameters, hydraulic oil density, and power unit pressure; a third determination module 205, the third determination module 205 is used to determine a target output flow according to the flow compensation value and the first output flow.

[0081] Optionally, the current operating condition data acquired by the first acquisition module 201 includes the oil temperature and the current output flow of the solenoid valve.

[0082] Optionally, the first determination module 202 is further used to: query a preset flow calibration table to determine the first output flow according to the control instruction and current operating condition data.

[0083] Optionally, the solenoid valve parameters acquired by the second acquisition module 203 include: valve port flow coefficient, valve port working chamber area gradient, valve core displacement, valve port inlet pressure and valve port outlet pressure.

[0084] Optionally, the second determination module 204 is also used to: determine a first sub-compensation value using a first preset formula according to the valve flow coefficient, the valve working chamber area gradient, the valve core displacement, the hydraulic oil density, the valve inlet pressure and the valve outlet pressure; determine a second sub-compensation value using a second preset formula according to the valve flow coefficient, the valve working chamber area gradient, the valve core displacement, the hydraulic oil density, the valve inlet pressure and the valve outlet pressure; determine the flow compensation value according to the first sub-compensation value and the second sub-compensation value.

[0085] Optionally, the third determination module 205 is further used to: sum the first output flow and the flow compensation value to determine the target output flow.

[0086] Optionally, the control device of the hydraulic system solenoid valve also includes a control module, Figure 3 Not shown in the figure, the control module is connected to the third determination module 205, and the control module is used to determine the solenoid valve control current according to the target output flow to complete the control of the solenoid valve.

[0087] An embodiment of the present invention further provides a vehicle, the vehicle comprising a memory and a processor, the memory storing a computer program, and the processor being configured to run the computer program to execute the control method of the hydraulic system solenoid valve described in any of the above embodiments.

[0088] Optionally, in this embodiment, the processor in the vehicle may be configured to run a computer program to perform the following steps:

[0089] Step S101, in response to a control instruction of the hydraulic system, obtaining current working condition data of the hydraulic system.

[0090] Step S102, determining the first output flow of the solenoid valve according to the control instruction and the current working condition data.

[0091] Step S103, obtaining solenoid valve parameters, hydraulic oil density, and power unit pressure.

[0092] Step S104, determining a flow compensation value according to the solenoid valve parameters, the hydraulic oil density and the power unit pressure.

[0093] Step S105, determining the target output flow rate according to the flow compensation value and the first output flow rate.

[0094] Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments and optional implementation modes, and this embodiment will not be described in detail here.

[0095] An embodiment of the present invention further provides a non-volatile storage medium, in which a computer program is stored, wherein the computer program is configured to execute the steps in the above-mentioned embodiment of the control method of the hydraulic system solenoid valve when running on a computer or a processor.

[0096] Optionally, in this embodiment, the non-volatile storage medium may be configured to store a computer program for performing the following steps:

[0097] Step S101, in response to a control instruction of the hydraulic system, obtaining current working condition data of the hydraulic system.

[0098] Step S102, determining the first output flow of the solenoid valve according to the control instruction and the current working condition data.

[0099] Step S103, obtaining solenoid valve parameters, hydraulic oil density, and power unit pressure.

[0100] Step S104, determining a flow compensation value according to the solenoid valve parameters, the hydraulic oil density and the power unit pressure.

[0101] Step S105, determining the target output flow rate according to the flow compensation value and the first output flow rate.

[0102] Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments and optional implementation modes, and this embodiment will not be described in detail here.

[0103] In the above embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0104] In some embodiments provided in the present application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0105] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0106] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0107] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution 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 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 method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk and other media that can store program codes.

[0108] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A control method for a hydraulic system solenoid valve, applied to a vehicle, characterized in that: include: In response to a control instruction of the hydraulic system, obtaining current working condition data of the hydraulic system, wherein the current working condition data is used to characterize a current state of the hydraulic system; Determine a first output flow rate of the solenoid valve according to the control instruction and the current working condition data, wherein the first output flow rate is a calibrated output flow rate; Obtaining solenoid valve parameters, hydraulic oil density, and power unit pressure, wherein the solenoid valve parameters include: valve port flow coefficient, valve port working chamber area gradient, valve core displacement, valve port inlet pressure, and valve port outlet pressure; Determine a first sub-compensation value using a first preset formula according to a preset compensation value, a compensation coefficient, the valve port flow coefficient, the valve port working chamber area gradient, the valve core displacement, the hydraulic oil density, the valve port inlet pressure, and the valve port outlet pressure; Determine a second sub-compensation value using a second preset formula according to the power unit pressure, the valve port flow coefficient, the valve port working chamber area gradient, the valve core displacement, the hydraulic oil density, the valve port inlet pressure, and the valve port outlet pressure; determining a flow compensation value according to the first sub-compensation value and the second sub-compensation value; A target output flow rate is determined according to the flow compensation value and the first output flow rate.

2. The control method of the hydraulic system solenoid valve according to claim 1, characterized in that: The current operating condition data includes oil temperature and current output flow of the solenoid valve.

3. The control method of the hydraulic system solenoid valve according to claim 1, characterized in that: Determining the first output flow of the solenoid valve according to the control instruction and the current operating condition data includes: According to the control instruction and the current operating condition data, a preset flow calibration table is queried to determine the first output flow.

4. The control method of the hydraulic system solenoid valve according to claim 1, characterized in that: Determining the target output flow rate according to the flow compensation value and the first output flow rate comprises: The first output flow rate and the flow compensation value are summed to determine the target output flow rate.

5. The control method of the hydraulic system solenoid valve according to claim 1, characterized in that: Also includes: The solenoid valve control current is determined according to the target output flow rate to complete the control of the solenoid valve.

6. A control device for a solenoid valve of a hydraulic system, characterized in that: include: a first acquisition module, the first acquisition module being used to acquire current working condition data of the hydraulic system in response to a control instruction of the hydraulic system, wherein the current working condition data is used to characterize a current state of the hydraulic system; A first determining module, the first determining module is used to determine a first output flow of the solenoid valve according to the control instruction and the current operating condition data, wherein the first output flow is a calibrated output flow; A second acquisition module, the second acquisition module is used to acquire solenoid valve parameters, hydraulic oil density, and power unit pressure, wherein the solenoid valve parameters include: valve port flow coefficient, valve port working chamber area gradient, valve core displacement, valve port inlet pressure, and valve port outlet pressure; a second determination module, the second determination module being used to determine a first sub-compensation value using a first preset formula according to a preset compensation value, a compensation coefficient, the valve port flow coefficient, the valve port working chamber area gradient, the valve core displacement, the hydraulic oil density, the valve port inlet pressure, and the valve port outlet pressure; to determine a second sub-compensation value using a second preset formula according to the power unit pressure, the valve port flow coefficient, the valve port working chamber area gradient, the valve core displacement, the hydraulic oil density, the valve port inlet pressure, and the valve port outlet pressure; and to determine a flow compensation value according to the first sub-compensation value and the second sub-compensation value; A third determination module is used to determine a target output flow rate according to the flow compensation value and the first output flow rate.

7. A vehicle comprising a memory and a processor, characterized in that: A computer program is stored in the memory, and the processor is configured to run the computer program to execute the control method of the hydraulic system solenoid valve as described in any one of claims 1 to 5 above.

8. A non-volatile storage medium, characterized in that: The non-volatile storage medium stores a computer program, wherein the computer program is configured to execute the control method of the hydraulic system solenoid valve as described in any one of claims 1 to 5 when running on a computer or a processor.

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