Flushing method and device for hybrid transmission valve body, storage medium and electronic equipment

Abstract

The invention discloses a flushing method and device for a hybrid transmission valve body, a storage medium and electronic equipment. The method comprises the steps that in the running process of the hybrid power vehicle, running condition information of the hybrid power vehicle is obtained, the hybrid power vehicle at least comprises a hybrid transmission, and the hybrid transmission at least comprises a transmission oil loop composed of a transmission oil pan, an oil pump and a pressure release valve; the running state of an oil pump is controlled based on the driving condition information so as to flush the pressure release valve, a flushing result is obtained, the oil pump flushes the pressure release valve by controlling the flowing state of transmission oil in a transmission oil loop, and the flushing result is used for showing that the blockage degree of the pressure release valve is smaller than the blockage degree of the pressure release valve before flushing. The technical problem that in the prior art, the flushing efficiency of the valve body in the hybrid transmission is low is solved.

Description

Technical Field

[0001] The present invention relates to the field of transmission valve body flushing, and in particular to a hybrid transmission valve body flushing method, device, storage medium and electronic equipment. Background Art

[0002] The pressure relief valve in the hybrid transmission of a hybrid vehicle may become clogged due to oil, impurities, etc. The pressure relief valve needs to be cleaned or cleared to ensure the normal operation of the pressure relief valve, that is, the valve body in the hybrid transmission needs to be flushed. By flushing the pressure relief valve, the possibility of clogging or damage to the pressure relief valve can be effectively reduced, the service life of the hybrid transmission can be extended, and the performance and reliability of the vehicle can be improved.

[0003] At present, in the related art, flushing the valve body in a hybrid transmission usually requires disassembling the hybrid transmission, or an additional solenoid valve for flushing the pressure relief valve needs to be provided in the hybrid transmission. In addition, flushing the valve body in the hybrid transmission requires the vehicle to be in a stopped or just started stage, and the time range for performing the flushing is relatively limited, resulting in low efficiency in flushing the valve body in the hybrid transmission.

[0004] To address the above-mentioned problems, no effective solution has been proposed yet. Summary of the invention

[0005] The embodiments of the present invention provide a method, device, storage medium and electronic device for flushing a hybrid transmission valve body, so as to at least solve the technical problem of low efficiency in flushing a valve body in a hybrid transmission in the related art.

[0006] According to one aspect of an embodiment of the present invention, a method for flushing a hybrid transmission valve body is provided, comprising: obtaining driving condition information of the hybrid vehicle during driving of the hybrid vehicle, wherein the hybrid vehicle includes at least a hybrid transmission, and the hybrid transmission includes at least a transmission oil circuit consisting of a transmission oil pan, an oil pump and a pressure relief valve; controlling the operating state of the oil pump based on the driving condition information to flush the pressure relief valve and obtain a flushing result, wherein the oil pump flushes the pressure relief valve by controlling the flow state of the transmission oil in the transmission oil circuit, and the flushing result is used to indicate that the blockage degree of the pressure relief valve is less than the blockage degree of the pressure relief valve before flushing.

[0007] Optionally, the operating state of the oil pump is controlled based on the driving condition information to flush the pressure relief valve to obtain a flushing result, including: obtaining a preset valve body flushing entry condition and a preset valve body flushing exit condition, wherein the preset valve body flushing entry condition is used to indicate a preset control condition for triggering flushing of the pressure relief valve, and the preset valve body flushing exit condition is used to indicate a preset control condition for terminating flushing of the pressure relief valve; based on the driving condition information, the preset valve body flushing entry condition and the preset valve body flushing exit condition, the operating state of the oil pump is controlled to flush the pressure relief valve.

[0008] Optionally, the operating state of the oil pump includes at least: the rotation direction and rotation speed of the oil pump; based on driving condition information, preset valve body flushing entry conditions and preset valve body flushing exit conditions, controlling the operating state of the oil pump to flush the pressure relief valve, including: determining a target duty cycle signal based on driving condition information, preset valve body flushing entry conditions and preset valve body flushing exit conditions; based on the target duty cycle information, controlling the rotation direction and rotation speed of the oil pump, wherein the rotation direction is used to control the flow direction of the transmission oil, and the rotation speed is used to control the flow speed of the transmission oil.

[0009] Optionally, the preset valve body flushing entry condition includes at least: the clutch in the hybrid transmission is in an engaged state and the clutch transmission torque is less than a first preset torque threshold, the engaged state being used to indicate that the engine and hybrid transmission in the hybrid vehicle are in an engaged state.

[0010] Optionally, the preset valve body flushing exit condition includes at least one of the following: the clutch in the hybrid transmission is in a disengaged state, the clutch's transmission torque demand is greater than a second preset torque threshold, and the flushing time for flushing the pressure relief valve is greater than a preset time threshold, wherein the disengaged state is used to indicate that the engine and hybrid transmission in the hybrid vehicle are in a disengaged state, and the second preset torque threshold is greater than the first preset torque threshold.

[0011] Optionally, based on driving condition information, preset valve body flushing entry conditions and preset valve body flushing exit conditions, the operating state of the oil pump is controlled to flush the pressure relief valve, including: based on driving condition information, preset valve body flushing entry conditions and preset valve body flushing exit conditions, the operating state of the oil pump and the opening and closing state of the throttle hole in the pressure relief valve are controlled to flush the pressure relief valve, wherein the opening and closing state of the throttle hole is used to change the hydraulic pressure of the transmission oil flowing through the pressure relief valve.

[0012] According to another aspect of an embodiment of the present invention, a flushing device for a hybrid transmission valve body is also provided, comprising: an acquisition module, used to acquire driving condition information of a hybrid vehicle during driving of the hybrid vehicle, wherein the hybrid vehicle includes at least a hybrid transmission, and the hybrid transmission includes at least a transmission oil circuit consisting of a transmission oil pan, an oil pump and a pressure relief valve; a control module, used to control the operating state of the oil pump based on the driving condition information to flush the pressure relief valve and obtain a flushing result, wherein the oil pump flushes the pressure relief valve by controlling the flow state of the transmission oil in the transmission oil circuit, and the flushing result is used to indicate that the blockage degree of the pressure relief valve is less than the blockage degree of the pressure relief valve before flushing.

[0013] According to another aspect of an embodiment of the present invention, there is further provided an electronic device, comprising: a memory storing an executable program; and a processor for running the program, wherein the method in each embodiment of the present invention is executed when the program is running.

[0014] According to another aspect of an embodiment of the present invention, a computer-readable storage medium is provided. The computer-readable storage medium includes a stored executable program, wherein when the executable program is running, the device where the computer-readable storage medium is located is controlled to execute the methods in various embodiments of the present invention.

[0015] According to another aspect of an embodiment of the present invention, a computer program product is provided, including a computer program. When the computer program is executed by a processor, the method in each embodiment of the present invention is implemented.

[0016] According to another aspect of an embodiment of the present invention, a computer program product is provided, including a non-volatile computer-readable storage medium, wherein the non-volatile computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method in each embodiment of the present invention is implemented.

[0017] According to another aspect of the embodiments of the present invention, a computer program is further provided. When the computer program is executed by a processor, the methods in the embodiments of the present invention are implemented.

[0018] In an embodiment of the present invention, a method for flushing a hybrid transmission valve body is provided, comprising: obtaining driving condition information of the hybrid vehicle during driving of the hybrid vehicle, wherein the hybrid vehicle includes at least a hybrid transmission, and the hybrid transmission includes at least a transmission oil circuit consisting of a transmission oil pan, an oil pump and a pressure relief valve; controlling the operating state of the oil pump based on the driving condition information to flush the pressure relief valve and obtain a flushing result, wherein the oil pump flushes the pressure relief valve by controlling the flow state of the transmission oil in the transmission oil circuit, and the flushing result is used to indicate that the blockage degree of the pressure relief valve is less than the blockage degree of the pressure relief valve before flushing. It is easy to notice that the present application proposes that the operating state of the oil pump in the transmission can be controlled based on the driving condition information of the hybrid vehicle to flush the pressure relief valve. This can be performed during normal driving of the vehicle, and there is no need to provide an additional flushing device in the hybrid transmission. The oil pump controls the flow state of the transmission oil in the transmission oil circuit to flush the pressure relief valve, thereby removing impurities and dirt in the pressure relief valve and maintaining the normal working state of the pressure relief valve. This can effectively ensure the normal operation of the hybrid transmission, extend the service life of the pressure relief valve and the hybrid transmission, and improve the overall performance and reliability of the hybrid vehicle, thereby solving the technical problem of low efficiency in flushing the valve body in the hybrid transmission in the related art. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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:

[0020] Figure 1 is a flow chart of a method for flushing a hybrid transmission valve body according to an embodiment of the present invention;

[0021] Figure 2 is a schematic diagram of a partial structure of an optional hybrid transmission according to an embodiment of the present invention;

[0022] Figure 3 is a schematic diagram of an optional corresponding relationship between the opening area of ​​a throttle hole and the pressure in the clutch inner cavity according to an embodiment of the present invention;

[0023] Figure 4 is a flow chart of an optional hybrid transmission valve body flushing method according to an embodiment of the present invention;

[0024] Figure 5 is a schematic diagram of a flushing device for a hybrid transmission valve body according to an embodiment of the present invention. DETAILED DESCRIPTION

[0025] 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.

[0026] 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 data used in this way can be interchanged 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.

[0027] According to an embodiment of the present invention, an embodiment of a method for flushing a hybrid transmission valve body is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a 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.

[0028] Figure 1 is a flow chart of a method for flushing a hybrid transmission valve body according to an embodiment of the present invention. Figure 1 As shown, the method comprises the following steps:

[0029] Step S102, while the hybrid vehicle is traveling, obtaining driving condition information of the hybrid vehicle.

[0030] The hybrid vehicle at least includes a hybrid transmission, and the hybrid transmission at least includes a transmission oil circuit consisting of a transmission oil pan, an oil pump and a pressure relief valve.

[0031] The above-mentioned hybrid vehicle may refer to a vehicle equipped with both an engine and an electric motor, which can automatically switch to use the engine and / or the electric motor to drive the vehicle according to different situations during driving. According to the different ratios and working modes of the electric motor and the engine, hybrid vehicles can be divided into parallel hybrid vehicles, section hybrid vehicles and series hybrid vehicles, wherein a parallel hybrid vehicle may refer to an engine and an electric motor connected to the wheels at the same time, and the engine and the electric motor can work independently or in coordination, the engine is mainly used for high-speed driving or long-distance driving, and the electric motor is mainly used for low-speed driving or starting acceleration; a section hybrid vehicle may refer to an engine that is mainly used for generating electricity, supplying power to the electric motor through a generator, and the electric motor then drives the vehicle, the engine and the electric motor can work independently or in coordination to improve fuel economy and reduce emissions; a series hybrid vehicle may refer to an engine that is only used for generating electricity, supplying power to the electric motor through a generator, and the electric motor directly drives the wheels, which can greatly reduce the fuel consumption and emissions of the engine. In actual use, a hybrid vehicle can automatically switch the working mode of the engine and the electric motor according to driving conditions to achieve better fuel efficiency and performance. The specific type of the above-mentioned hybrid vehicle can be determined according to actual needs and is not limited here.

[0032] The above-mentioned driving condition information may refer to various data and parameters of a hybrid vehicle during driving, which are used to indicate the operating status, performance and efficiency of the vehicle. The driving condition information may include but is not limited to the vehicle's engine operating status, motor operating status, energy flow status, vehicle speed and acceleration, energy utilization rate, transmission operating status, vehicle mileage information, etc., wherein the engine operating status may include engine speed, throttle opening, fuel consumption, etc.; the motor operating status may include motor output power, battery power, charging status, etc.; the energy flow status may include energy conversion and utilization, such as the conversion of engine output power into power to drive the vehicle, the supply of electrical energy, etc.; the vehicle speed and acceleration may include the real-time speed and acceleration of the vehicle; the energy utilization rate may include fuel consumption rate, battery charge and discharge efficiency, etc., the transmission operating status may include various operating parameters of the transmission, etc. The above-mentioned driving condition information may be determined according to actual needs and is not limited here.

[0033] The above-mentioned hybrid transmission may refer to a transmission installed on a hybrid vehicle that can adapt to the output of the engine and the electric motor. It can adjust the output power of the internal combustion engine and the electric motor according to the vehicle's driving state and driving requirements, and integrate the power output of the engine and the electric motor to the wheels, thereby achieving more efficient energy utilization and a smoother driving experience. The specific type and structure of the hybrid transmission can be determined according to actual needs and is not limited here.

[0034] The above-mentioned transmission oil pan may refer to a container for holding transmission oil in a hybrid transmission. The transmission oil pan may be located at the bottom of the transmission, storing transmission oil and protecting internal parts. The transmission oil pan may be made of metal or aluminum alloy to ensure that the transmission oil does not leak, protect transmission parts, reduce friction and wear, and extend the service life of the transmission.

[0035] The above-mentioned oil pump may refer to a device for transmitting lubricating oil and coolant in a hybrid transmission. The oil pump extracts lubricating oil and coolant from the oil tank and sends them to the transmission by rotation or pressure pump to ensure lubrication and cooling of various components inside the transmission. The oil pump may be an electric oil pump, etc. The specific type of the oil pump can be determined according to actual needs and is not limited here.

[0036] The above-mentioned pressure relief valve may refer to a mechanical valve body that controls the release of oil pressure during the operation of the hybrid transmission. The pressure relief valve may control the oil pressure in the hydraulic system by adjusting the opening and closing of the valve, that is, the valve body in the hybrid transmission that needs to be flushed in this application.

[0037] The above-mentioned transmission oil circuit may refer to a transmission oil flow circuit composed of a transmission oil pan, an oil pump and a pressure relief valve. The transmission oil may flow from the transmission oil pan through the oil pump, then through the pressure relief valve, and finally return to the transmission oil pan to form a transmission oil flow circuit. The specific transmission oil circuit may also be determined according to actual needs and is not limited here.

[0038] In an optional embodiment, driving condition information of the hybrid vehicle can be obtained during the driving of the hybrid vehicle. A transmission oil pan, an oil pump and a pressure relief valve are installed in the hybrid transmission. The oil pump circulates the transmission oil to various components and keeps the oil pressure stable. The pressure relief valve is used to adjust the oil pressure to ensure the normal operation of the transmission. When the transmission is working, the transmission oil will flow to various components for lubrication and cooling, and will also take away the heat generated by the friction of the components. Specifically, the driving condition information of the hybrid vehicle can be obtained, and the working state of the hybrid transmission can be monitored by sensors, which may include parameters such as the speed, oil temperature, and oil pressure of the transmission. Through the above steps, it is possible to obtain the driving condition information of the hybrid vehicle during the driving of the hybrid vehicle, thereby providing data support for the subsequent control of the operating state of the oil pump in the hybrid transmission.

[0039] Step S104, controlling the operating state of the oil pump based on the driving condition information to flush the pressure relief valve and obtain a flushing result.

[0040] The oil pump flushes the pressure relief valve by controlling the flow state of the transmission oil in the transmission oil circuit, and the flushing result is used to indicate that the blockage degree of the pressure relief valve is less than the blockage degree of the pressure relief valve before flushing.

[0041] In an optional embodiment, the running state of the oil pump can be controlled based on the driving condition information to realize flushing of the pressure relief valve. Specifically, the driving condition information of the vehicle can be collected in real time through the vehicle's sensors and control unit, including data such as vehicle speed, throttle opening, and engine speed. Based on the collected driving condition information, the system can analyze and evaluate whether the necessary conditions for executing the flushing step are met and the degree of blockage of the pressure relief valve to determine whether a flushing operation is required. Based on the results of the analysis, the running state of the oil pump can be controlled to flush the pressure relief valve by adjusting the flow state of the transmission oil in the transmission oil circuit. The oil pump controls the flow state of the transmission oil to flush the flowing transmission oil through the pressure relief valve, removes impurities and blockages in the pressure relief valve, and ensures the normal operation of the pressure relief valve. After the flushing operation is completed, the system can also re-detect the blockage degree of the pressure relief valve through the sensor and control unit to ensure that the blockage degree of the pressure relief valve after flushing is less than the blockage degree before flushing. Through the above steps, the pressure relief valve can be flushed in time according to the vehicle's driving condition information to ensure the normal operation of the pressure relief valve and improve the performance and life of the transmission. Feedback and adjustments can also be made based on the flushing results to achieve effective management and maintenance of the pressure relief valve.

[0042] In an embodiment of the present invention, a method for flushing a hybrid transmission valve body is provided, comprising: obtaining driving condition information of the hybrid vehicle during driving of the hybrid vehicle, wherein the hybrid vehicle includes at least a hybrid transmission, and the hybrid transmission includes at least a transmission oil circuit consisting of a transmission oil pan, an oil pump and a pressure relief valve; controlling the operating state of the oil pump based on the driving condition information to flush the pressure relief valve and obtain a flushing result, wherein the oil pump flushes the pressure relief valve by controlling the flow state of the transmission oil in the transmission oil circuit, and the flushing result is used to indicate that the blockage degree of the pressure relief valve is less than the blockage degree of the pressure relief valve before flushing. It is easy to notice that the present application proposes that the operating state of the oil pump in the transmission can be controlled based on the driving condition information of the hybrid vehicle to flush the pressure relief valve. This can be performed during normal driving of the vehicle, and there is no need to provide an additional flushing device in the hybrid transmission. The oil pump controls the flow state of the transmission oil in the transmission oil circuit to flush the pressure relief valve, thereby removing impurities and dirt in the pressure relief valve and maintaining the normal working state of the pressure relief valve. This can effectively ensure the normal operation of the hybrid transmission, extend the service life of the pressure relief valve and the hybrid transmission, and improve the overall performance and reliability of the hybrid vehicle, thereby solving the technical problem of low efficiency in flushing the valve body in the hybrid transmission in the related art.

[0043] Optionally, the operating state of the oil pump is controlled based on the driving condition information to flush the pressure relief valve to obtain a flushing result, including: obtaining a preset valve body flushing entry condition and a preset valve body flushing exit condition, wherein the preset valve body flushing entry condition is used to indicate a preset control condition for triggering flushing of the pressure relief valve, and the preset valve body flushing exit condition is used to indicate a preset control condition for terminating flushing of the pressure relief valve; based on the driving condition information, the preset valve body flushing entry condition and the preset valve body flushing exit condition, the operating state of the oil pump is controlled to flush the pressure relief valve.

[0044] In an optional embodiment, a preset valve body flushing entry condition and a preset valve body flushing exit condition can be obtained, and a condition for triggering flushing of the pressure relief valve, i.e., a preset valve body flushing entry condition, can be preset. Relevant driving condition information, such as vehicle speed, oil temperature, and other data, can be obtained through a sensor to determine when the pressure relief valve needs to be flushed. A preset valve body flushing exit condition can also be set, i.e., a preset condition for stopping flushing of the pressure relief valve, to ensure the effectiveness and safety of the flushing process. Further, based on the driving condition information, the preset valve body flushing entry condition, and the preset valve body flushing exit condition, the running state of the oil pump can be controlled to flush the pressure relief valve. Specifically, when the preset valve body flushing entry condition is met, the oil pump is controlled to start and the transmission oil is injected into the pressure relief valve for flushing. At the same time, the driving condition information can be monitored, and when the preset valve body flushing exit condition is met, the oil pump is stopped to end the flushing process of the pressure relief valve, so that the hybrid transmission valve body can be effectively flushed by driving condition information, setting the preset flushing condition, and controlling the running state of the oil pump, thereby ensuring the normal operation of the hybrid transmission valve body and extending the service life.

[0045] Optionally, the operating state of the oil pump includes at least: the rotation direction and rotation speed of the oil pump; based on driving condition information, preset valve body flushing entry conditions and preset valve body flushing exit conditions, controlling the operating state of the oil pump to flush the pressure relief valve, including: determining a target duty cycle signal based on driving condition information, preset valve body flushing entry conditions and preset valve body flushing exit conditions; based on the target duty cycle information, controlling the rotation direction and rotation speed of the oil pump, wherein the rotation direction is used to control the flow direction of the transmission oil, and the rotation speed is used to control the flow speed of the transmission oil.

[0046] In an optional embodiment, a target duty cycle signal can be calculated based on driving condition information, preset valve body flushing entry conditions and preset valve body flushing exit conditions, which can be the ratio of opening time to closing time in the oil pump working cycle; then, according to the target duty cycle information, valve body flushing can be achieved by controlling the rotation direction and rotation speed of the oil pump. The rotation direction is used to control the flow direction of the transmission oil. For example, high-frequency change of the rotation direction can achieve repeated and vibratory impact on the blockage in the pressure relief valve, or forward rotation can be set for flushing the valve body, and reverse rotation can be used to discharge waste liquid; the rotation speed can be used to control the flow speed of the transmission oil, and the impact strength on the blockage in the pressure relief valve can be achieved. The rotation speed can be adjusted as needed to control the flushing effect. Through the above steps, the operating state of the oil pump can be controlled during the flushing process of the hybrid transmission valve body to ensure the effect and stability of the valve body flushing.

[0047] Optionally, the preset valve body flushing entry condition includes at least: the clutch in the hybrid transmission is in an engaged state and the clutch transmission torque is less than a first preset torque threshold, the engaged state being used to indicate that the engine and hybrid transmission in the hybrid vehicle are in an engaged state.

[0048] The first preset torque threshold mentioned above may refer to a preset threshold for measuring the transmission torque of the clutch. For example, the first preset torque threshold may be set to 50 N·m. The first preset torque threshold may be determined according to actual needs and is not limited here.

[0049] In an optional embodiment, the setting of a preset valve body flushing entry condition can ensure that the valve body is flushed under appropriate circumstances. The preset valve body flushing entry condition can at least include the following conditions: the clutch in the hybrid transmission is in an engaged state and the clutch transmission torque is less than a first preset torque threshold, wherein the clutch in the hybrid transmission is in an engaged state, which can indicate that the engine and the hybrid transmission in the hybrid vehicle are in an engaged state, that is, the power of the engine can be transmitted to the transmission. In this case, the oil pump will control the transmission oil to flow into the clutch oil circuit. Combined with the structure and position relationship of the pressure relief valve in the transmission, the condition for controlling the oil pump to flush the pressure relief valve is met at this time; the clutch transmission torque is less than the first preset torque threshold, which can indicate that the transmission is working under a low load state. At this time, it is more suitable to flush the pressure relief valve. By triggering the valve body flushing by the size of the clutch transmission torque, unnecessary flushing operations under high load conditions can be avoided, saving energy and reducing costs. The setting of the preset valve body flushing entry condition can ensure that the valve body is flushed at an appropriate time and under appropriate conditions, improve the performance and reliability of the hybrid transmission system, and extend the service life of the hybrid transmission system.

[0050] Optionally, the preset valve body flushing exit condition includes at least one of the following: the clutch in the hybrid transmission is in a disengaged state, the clutch's transmission torque demand is greater than a second preset torque threshold, and the flushing time for flushing the pressure relief valve is greater than a preset time threshold, wherein the disengaged state is used to indicate that the engine and hybrid transmission in the hybrid vehicle are in a disengaged state, and the second preset torque threshold is greater than the first preset torque threshold.

[0051] The aforementioned transfer torque demand may refer to the transfer torque required by the vehicle sent by the vehicle control system to the clutch.

[0052] The second preset torque threshold mentioned above may refer to a preset threshold for measuring the transmission torque requirement of the clutch. For example, the second preset torque threshold may be set to 80 N·m. The second preset torque threshold may be determined according to actual needs and is not limited here.

[0053] In an optional embodiment, the setting of a preset valve body flushing exit condition can ensure that the hybrid transmission valve body exits the flushing state at an appropriate time to ensure the normal operation and performance of the hybrid vehicle. The preset valve body flushing exit condition can include at least one of the following: when the clutch in the hybrid transmission is in a disengaged state, the valve body will exit the flushing state. This is because in the clutch disengaged state, there is no torque transmitted between the engine and the hybrid transmission. Combined with the structure and position relationship of the pressure relief valve in the transmission, it is suitable to continue the flushing operation at this time; when the transmission torque demand of the clutch is greater than the second preset torque threshold, the valve body will also exit the flushing state, which can avoid continuous flushing under high load conditions and protect the normal operation of the hybrid transmission; when the flushing time of the pressure relief valve is greater than the preset time threshold, the valve body can also exit the flushing process, which can prevent the flushing operation from being too long, avoid wasting resources and possible adverse effects. Through the above settings, it can be ensured that the hybrid transmission valve body exits the flushing state under appropriate conditions, improve the efficiency and reliability of the system, and ensure the stability and performance of the hybrid vehicle.

[0054] Optionally, based on driving condition information, preset valve body flushing entry conditions and preset valve body flushing exit conditions, the operating state of the oil pump is controlled to flush the pressure relief valve, including: based on driving condition information, preset valve body flushing entry conditions and preset valve body flushing exit conditions, the operating state of the oil pump and the opening and closing state of the throttle hole in the pressure relief valve are controlled to flush the pressure relief valve, wherein the opening and closing state of the throttle hole is used to change the hydraulic pressure of the transmission oil flowing through the pressure relief valve.

[0055] In an optional embodiment, during the flushing process of the hybrid transmission valve body, the operating state of the oil pump and the opening and closing state of the throttle hole in the pressure relief valve can be controlled based on the driving condition information, the preset valve body flushing entry condition and the preset valve body flushing exit condition to flush the pressure relief valve. Specifically, the operating state of the oil pump can be controlled according to the driving condition information and the set flushing conditions, and the opening and closing state of the throttle hole in the pressure relief valve can be controlled to change the liquid pressure of the transmission oil flowing through the pressure relief valve. According to the flushing entry condition and exit condition of the pressure relief valve, the pressure relief valve is flushed by controlling the operating state of the oil pump and the opening and closing state of the throttle hole to remove possible dirt or impurities and ensure the normal operation of the pressure relief valve. By flushing the pressure relief valve based on the driving condition information and the preset conditions, the normal operation of the pressure relief valve can be ensured, the efficiency and reliability of the hybrid transmission can be improved, and the service life of the hybrid transmission can be extended. At the same time, the possibility of failure can also be reduced, and the overall performance and driving experience of the vehicle can be improved.

[0056] The technical solution proposed in this application is explained below in combination with an optional application scenario. This application relates to a hybrid transmission valve body flushing method. In recent years, the clutch action execution control scheme of the oil pump direct control clutch has been widely used due to its relatively low cost, low power consumption, short development cycle and other advantages. For this clutch execution scheme, a pressure relief valve is added to its clutch oil circuit to throttle the oil leakage path from the oil pump to the clutch execution oil chamber, which can further reduce the oil pump power consumption in the torque range. The throttling area of ​​the pressure relief valve is related to the pressure of the clutch execution oil chamber. When the pressure in the execution oil chamber is lower than the opening pressure of the pressure relief valve, the throttle hole is in a closed state. When the pressure in the execution oil chamber is higher than the opening pressure of the pressure relief valve, the throttle hole is opened, and the oil in the oil pan flows back to the oil pan through the oil pump, the oil circuit, and the pressure relief valve to form a loop. The addition of the pressure relief valve can achieve a lower flow demand to establish a higher clutch execution oil chamber pressure; when the throttle hole opening is small, due to the cleanliness of the oil, it is easy to cause the throttle hole to be blocked, and the pressure and flow are unstable, which causes the clutch to be unable to form a stable engagement state.

[0057] The present application proposes a valve body flushing method for a hybrid transmission. In view of the above-mentioned cleanliness problem, a special cleaning strategy is designed to achieve cleaning of the inside of the valve body to help achieve stable pressure and flow control of the clutch execution oil chamber. The clutch execution operation scheme can be composed of three parts: a clutch oil circuit, a pressure relief valve, and a hydraulic oil pump. When the clutch needs to be engaged, a duty cycle command is sent to the oil pump controller to achieve forward rotation of the oil pump. When the pressure is lower than the pressure relief pressure of the pressure relief valve, the pressure relief valve is closed and the oil pump flow is completely injected into the clutch oil chamber. When the pressure is higher than the pressure relief valve pressure, the pressure relief valve is opened and throttling is achieved through the throttle hole of the pressure relief valve. The clutch pressure is then controlled. There is a corresponding relationship between the clutch pressure build-up pressure and the duty cycle. When the duty cycle is small, less than and far from 0%, a larger valve body throttle hole area can be achieved. When the duty cycle is large, less than and close to 0%, the throttle hole can be closed. This feature can be used to design a special valve body flushing action to clean the valve body and achieve long-term and stable pressure control.

[0058] It can be seen from the above description that rapid valve body movement can shake off contaminants in the valve body, and a larger flow rate can take away contaminants in the valve body. According to the above analysis, the hybrid transmission valve body flushing scheme can be designed as follows: The valve body flushing function activation condition design can judge the working state of the clutch. When the following working state conditions are met, the flushing action can be performed. The following working conditions are in the relationship between: the current hybrid system is in parallel state, the clutch transmission torque is less than 50Nm, the accelerator pedal opening is higher than 10%, the transmission oil temperature is higher than 60°C, the continuous mileage exceeds 100 kilometers or the clutch remains engaged for more than 60 minutes. The above valve body flushing function activation conditions can also be determined according to actual needs and are not limited here.

[0059] The valve body flushing function exit condition design, when the following working conditions are met, the valve body flushing function is exited, the following working conditions are in an or relationship, and may include: the clutch transmission torque demand is higher than 80Nm, the pressure fluctuation caused by the valve body flushing process may affect the clutch torque transmission, so when the clutch transmission torque demand changes, the valve body flushing function needs to be exited; the clutch controller receives a separation command, the clutch receives a separation command, the current working state no longer has the conditions for flushing, so the valve body flushing function needs to be exited; the clutch execution system fails, the current working state no longer has the conditions for flushing, and the valve body flushing function needs to be exited; the actual pressure of the clutch is too low during the flushing process, and the flushing action causes the actual pressure of the clutch to be too low during the flushing process, and continuing the action may cause the clutch pressure to further decrease, so the valve body flushing function needs to be exited; the valve body flushing action is completed, and the flushing function is exited.

[0060] The valve body flushing action design may include taking the duty cycle corresponding to the current clutch demand pressure as the starting duty cycle A and -100% duty cycle as the target duty cycle B, and performing square wave control, so that the throttle hole is opened and closed three times while ensuring the clutch engagement pressure. During this process, the valve core fluctuates up and down due to pressure changes, and the flow rate also fluctuates up and down. Any stolen goods stuck in the valve body will be carried away by the oil flowing through the valve body. The above flushing process can also be determined according to actual needs and is not limited here.

[0061] Figure 2 is a schematic diagram of a partial structure of an optional hybrid transmission according to an embodiment of the present invention, such as Figure 2 As shown, an optional connection relationship between the clutch, pressure relief valve, oil pump, one-way valve, back valve and transmission oil pan in a hybrid transmission is demonstrated. The multiple transmission oil pans shown in the figure may actually be one.

[0062] Figure 3 It is a schematic diagram of an optional corresponding relationship between the throttle hole opening area and the clutch inner cavity pressure according to an embodiment of the present invention, showing an optional corresponding relationship between the throttle hole opening area and the clutch inner cavity pressure, so that the appropriate throttle hole opening area can be determined based on the clutch inner cavity pressure to achieve more efficient flushing of the pressure relief valve.

[0063] Figure 4 is a flow chart of an optional hybrid transmission valve body flushing method according to an embodiment of the present invention, such as Figure 4 As shown, it includes: step S402, obtaining the driving condition information of the hybrid vehicle during the driving of the hybrid vehicle; step S404, obtaining the preset valve body flushing entry condition and the preset valve body flushing exit condition; step S406, based on the driving condition information, the preset valve body flushing entry condition and the preset valve body flushing exit condition, controlling the operating state of the oil pump and the opening and closing state of the throttle hole in the pressure relief valve to flush the pressure relief valve and obtain the flushing result.

[0064] According to another aspect of an embodiment of the present invention, a hybrid transmission valve body flushing device is also provided, which can execute the hybrid transmission valve body flushing method of the above embodiment. The specific implementation method and preferred application scenario are the same as the above embodiment and will not be repeated here.

[0065] Figure 5 is a schematic diagram of a flushing device for a hybrid transmission valve body according to an embodiment of the present application, such as Figure 5 As shown, the device includes the following: an acquisition module 502 and a control module 504 .

[0066] Among them, the acquisition module is used to obtain the driving condition information of the hybrid vehicle during the driving of the hybrid vehicle, wherein the hybrid vehicle includes at least a hybrid transmission, and the hybrid transmission includes at least a transmission oil circuit composed of a transmission oil pan, an oil pump and a pressure relief valve; the control module is used to control the operating state of the oil pump based on the driving condition information to flush the pressure relief valve and obtain a flushing result, wherein the oil pump flushes the pressure relief valve by controlling the flow state of the transmission oil in the transmission oil circuit, and the flushing result is used to indicate that the blockage degree of the pressure relief valve is less than the blockage degree of the pressure relief valve before flushing.

[0067] Among them, the control module is also used to obtain a preset valve body flushing entry condition and a preset valve body flushing exit condition, wherein the preset valve body flushing entry condition is used to indicate a preset control condition for triggering flushing of the pressure relief valve, and the preset valve body flushing exit condition is used to indicate a preset control condition for terminating flushing of the pressure relief valve; based on the driving condition information, the preset valve body flushing entry condition and the preset valve body flushing exit condition, the operating state of the oil pump is controlled to flush the pressure relief valve.

[0068] Among them, the operating state of the oil pump includes at least: the rotation direction and rotation speed of the oil pump; the control module is also used to determine the target duty cycle signal based on driving condition information, preset valve body flushing entry conditions and preset valve body flushing exit conditions; based on the target duty cycle information, the rotation direction and rotation speed of the oil pump are controlled, wherein the rotation direction is used to control the flow direction of the transmission oil, and the rotation speed is used to control the flow speed of the transmission oil.

[0069] Among them, the preset valve body flushing entry conditions at least include: the clutch in the hybrid transmission is in an engaged state and the clutch transmission torque is less than a first preset torque threshold, and the engaged state is used to indicate that the engine and hybrid transmission in the hybrid vehicle are in an engaged state.

[0070] Among them, the preset valve body flushing exit conditions include at least one of the following: the clutch in the hybrid transmission is in a disengaged state, the clutch's transmission torque demand is greater than a second preset torque threshold, and the flushing time for flushing the pressure relief valve is greater than a preset time threshold, wherein the disengaged state is used to indicate that the engine and hybrid transmission in the hybrid vehicle are in a disengaged state, and the second preset torque threshold is greater than the first preset torque threshold.

[0071] Among them, the control module is also used to control the operating state of the oil pump and the opening and closing state of the throttle hole in the pressure relief valve based on driving condition information, preset valve body flushing entry conditions and preset valve body flushing exit conditions to flush the pressure relief valve, wherein the opening and closing state of the throttle hole is used to change the hydraulic pressure of the transmission oil flowing through the pressure relief valve.

[0072] An embodiment of the present application further provides an electronic device, comprising: a memory storing an executable program; and a processor for running the program, wherein the program executes the methods in various embodiments of the present invention when running.

[0073] The above-mentioned memory may refer to a device inside a computer for storing data and programs, and may include memory, hard disk, etc., wherein the memory may be used to temporarily store running programs and data, the hard disk may be used to store programs and data for a long time, and the memory may be used to enable the computer to read and write data, and execute programs; the above-mentioned processor may be responsible for executing instructions in computer programs and performing data processing, and may be responsible for controlling and executing various operations, including arithmetic operations, logical operations, data transmission, etc.

[0074] An embodiment of the present application further provides a computer-readable storage medium, which includes a stored executable program, wherein when the executable program is running, the device where the computer-readable storage medium is located is controlled to execute the methods in various embodiments of the present invention.

[0075] The above-mentioned computer storage medium may refer to a medium in a computer memory used to store certain discontinuous physical quantities. Computer storage media mainly include semiconductors, magnetic cores, magnetic drums, magnetic tapes, laser disks, etc.; the stored program included in the computer-readable storage medium may be a set of instructions that can be recognized and executed by a computer, running on an electronic computer, and is an information tool that meets certain needs of people.

[0076] An embodiment of the present application further provides a computer program product, including a computer program, which implements the methods in various embodiments of the present invention when executed by a processor.

[0077] The above-mentioned computer program product may refer to a software program that has been written, tested and released and can be run on a computer or other device. The computer program product may include an application, an operating system, tool software, etc., which is used to implement specific functions or solve specific problems.

[0078] An embodiment of the present application further provides a computer program product, including a non-volatile computer-readable storage medium, wherein the non-volatile computer-readable storage medium is used to store a computer program, and when the computer program is executed by a processor, the method in each embodiment of the present invention is implemented.

[0079] The above-mentioned non-volatile computer-readable storage medium may refer to a medium for storing data. The non-volatile computer-readable storage medium can keep the data from being lost when the power is off, and can be used to store long-term data, such as operating systems, applications, and user files. The non-volatile storage medium may include hard disk drives, solid-state drives, optical disks, and flash memory storage devices, etc.

[0080] The embodiments of the present application further provide a computer program, which implements the methods in the above-mentioned embodiments of the present invention when executed by a processor.

[0081] The above-mentioned computer program may refer to a collection of instructions used to tell a computer to perform a specific task or operation. A computer program may be written by a programmer using a specific programming language and may include algorithms, data structures, logic, and control flows. A computer program may be used for a variety of purposes, including application software, operating systems, and the like.

[0082] 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.

[0083] In the several embodiments provided in this 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.

[0084] 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.

[0085] 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.

[0086] 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. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, server or 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, disk or optical disk, etc. Various media that can store program codes.

[0087] 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 method for flushing a hybrid transmission valve body, characterized in that: include: Acquiring driving condition information of the hybrid vehicle during driving of the hybrid vehicle, wherein the hybrid vehicle at least includes a hybrid transmission, and the hybrid transmission at least includes a transmission oil circuit consisting of a transmission oil pan, an oil pump, and a pressure relief valve; The operating state of the oil pump is controlled based on the driving condition information to flush the pressure relief valve to obtain a flushing result, wherein the oil pump flushes the pressure relief valve by controlling the flow state of the transmission oil in the transmission oil circuit, and the flushing result is used to indicate that the blockage degree of the pressure relief valve is less than the blockage degree of the pressure relief valve before flushing.

2. The method for flushing a hybrid transmission valve body according to claim 1, characterized in that: Controlling the operating state of the oil pump based on the driving condition information to flush the pressure relief valve and obtain a flushing result includes: Acquire a preset valve body flushing entry condition and a preset valve body flushing exit condition, wherein the preset valve body flushing entry condition is used to indicate a preset control condition for triggering flushing of the pressure relief valve, and the preset valve body flushing exit condition is used to indicate a preset control condition for terminating flushing of the pressure relief valve; Based on the driving condition information, the preset valve body flushing entry condition and the preset valve body flushing exit condition, the operating state of the oil pump is controlled to flush the pressure relief valve.

3. The method for flushing a hybrid transmission valve body according to claim 2, characterized in that: The running state of the oil pump includes at least: the rotation direction and the rotation speed of the oil pump; based on the driving condition information, the preset valve body flushing entry condition and the preset valve body flushing exit condition, the running state of the oil pump is controlled to flush the pressure relief valve, including: determining a target duty cycle signal based on the driving condition information, the preset valve body flushing entry condition, and the preset valve body flushing exit condition; Based on the target duty cycle information, the rotation direction and the rotation speed of the oil pump are controlled, wherein the rotation direction is used to control the flow direction of the transmission oil, and the rotation speed is used to control the flow speed of the transmission oil.

4. The method for flushing a hybrid transmission valve body according to claim 2, characterized in that: The preset valve body flushing entry condition includes at least: the clutch in the hybrid transmission is in an engaged state and the transmission torque of the clutch is less than a first preset torque threshold, and the engaged state is used to indicate that the engine in the hybrid vehicle and the hybrid transmission are in an engaged state.

5. The method for flushing a hybrid transmission valve body according to claim 2, characterized in that: The preset valve body flushing exit condition includes at least one of the following: the clutch in the hybrid transmission is in a disengaged state, the transmission torque demand of the clutch is greater than a second preset torque threshold, and the flushing time for flushing the pressure relief valve is greater than a preset time threshold, wherein the disengaged state is used to indicate that the engine and the hybrid transmission in the hybrid vehicle are in a disengaged state, and the second preset torque threshold is greater than the first preset torque threshold.

6. The method for flushing a hybrid transmission valve body according to claim 2, characterized in that: Based on the driving condition information, the preset valve body flushing entry condition and the preset valve body flushing exit condition, controlling the operating state of the oil pump to flush the pressure relief valve includes: Based on the driving condition information, the preset valve body flushing entry condition and the preset valve body flushing exit condition, the operating state of the oil pump and the opening and closing state of the throttle hole in the pressure relief valve are controlled to flush the pressure relief valve, wherein the opening and closing state of the throttle hole is used to change the hydraulic pressure of the transmission oil flowing through the pressure relief valve.

7. A flushing device for a hybrid transmission valve body, characterized in that: include: an acquisition module, configured to acquire driving condition information of the hybrid vehicle during driving of the hybrid vehicle, wherein the hybrid vehicle at least includes a hybrid transmission, and the hybrid transmission at least includes a transmission oil circuit consisting of a transmission oil pan, an oil pump, and a pressure relief valve; A control module is used to control the operating state of the oil pump based on the driving condition information to flush the pressure relief valve and obtain a flushing result, wherein the oil pump flushes the pressure relief valve by controlling the flow state of the transmission oil in the transmission oil circuit, and the flushing result is used to indicate that the blockage degree of the pressure relief valve is less than the blockage degree of the pressure relief valve before flushing.

8. An electronic device, characterized in that: include: A memory storing an executable program; A processor is used to run the program, wherein the program, when running, executes the hybrid transmission valve body flushing method as claimed in any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a stored executable program, wherein when the executable program is running, the device where the storage medium is located is controlled to execute the hybrid transmission valve body flushing method according to any one of claims 1 to 6.

10. A computer program product, characterized in that The invention comprises a computer program, which, when executed by a processor, implements the flushing method of the hybrid transmission valve body according to any one of claims 1 to 6.

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