Method and device for flushing a hybrid transmission valve body, storage medium and electronic device

Abstract

This invention discloses a method, apparatus, storage medium, and electronic device for flushing a hybrid transmission valve body. The method includes: acquiring driving status information of the hybrid vehicle during operation, wherein the hybrid vehicle includes at least a hybrid transmission, and the hybrid transmission includes at least a transmission fluid 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 status information to flush the pressure relief valve, and obtaining a flushing result, wherein the oil pump flushes the pressure relief valve by controlling the flow state of the transmission fluid in the transmission fluid circuit, and the flushing result indicates that the degree of blockage of the pressure relief valve is less than the degree of blockage before flushing. This invention solves the technical problem of low efficiency in flushing valve bodies in hybrid transmissions in related technologies.

Description

Technical Field

[0001] This invention relates to the field of transmission valve body flushing, and more specifically, to a method, apparatus, storage medium, and electronic device for flushing a hybrid transmission valve body. Background Technology

[0002] The pressure relief valve in the hybrid transmission of a hybrid vehicle can become clogged due to oil, impurities, etc. It needs to be cleaned or rinsed to ensure its proper functioning. This involves flushing the valve body in the hybrid transmission. By flushing the pressure relief valve, the possibility of blockage or damage can be effectively reduced, extending the service life of the hybrid transmission and improving the performance and reliability of the vehicle.

[0003] Currently, the relevant technologies for flushing valve bodies in hybrid transmissions usually require disassembling the hybrid transmission or installing an additional solenoid valve in the hybrid transmission to flush the pressure relief valve. Furthermore, flushing valve bodies in hybrid transmissions requires the vehicle to be stopped or just starting, and the time range for flushing is relatively limited, resulting in low efficiency in flushing valve bodies in hybrid transmissions.

[0004] There is currently no effective solution to the above problems. Summary of the Invention

[0005] This invention provides a method, apparatus, storage medium, and electronic device for flushing valve bodies in hybrid transmissions, to at least solve the technical problem of low efficiency in flushing valve bodies in hybrid transmissions in related technologies.

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

[0007] Optionally, the operating state of the oil pump is controlled based on driving condition information to flush the pressure relief valve and obtain flushing results, including: acquiring preset valve body flushing entry conditions and preset valve body flushing exit conditions, wherein the preset valve body flushing entry conditions are used to indicate the pre-set conditions for controlling the pressure relief valve to trigger flushing, and the preset valve body flushing exit conditions are used to indicate the pre-set conditions for controlling the pressure relief valve to stop flushing; 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.

[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 includes: determining a target duty cycle signal based on driving condition information, preset valve body flushing entry conditions and preset valve body flushing exit conditions; and controlling the rotation direction and rotation speed of the oil pump based on the target duty cycle information, wherein the rotation direction is used to control the flow direction of the transmission fluid and the rotation speed is used to control the flow speed of the transmission fluid.

[0009] Optionally, the preset valve body flushing entry conditions include at least: the clutch in the hybrid transmission is engaged and the transmission torque of the clutch is less than a first preset torque threshold, where the engagement state indicates that the engine and hybrid transmission in the hybrid vehicle are engaged.

[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 transmission torque demand of the clutch is greater than a second preset torque threshold, and the flushing duration of flushing the pressure relief valve is greater than a preset duration 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 a 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. This includes: 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 and the opening / closing state of the throttle orifice in the pressure relief valve to flush the pressure relief valve. The opening / closing state of the throttle orifice is used to change the hydraulic pressure of the transmission oil flowing through the pressure relief valve.

[0012] According to another aspect of the present invention, a flushing device for a hybrid transmission valve body is also provided, comprising: an acquisition module for acquiring driving status information of the hybrid vehicle during driving, 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; and a control module for controlling the operating state of the oil pump based on the driving status 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 degree of blockage of the pressure relief valve is less than the degree of blockage of the pressure relief valve before flushing.

[0013] According to another aspect of the present invention, an electronic device is also provided, comprising: a memory storing an executable program; and a processor for running the program, wherein the program executes the methods of various embodiments of the present invention during runtime.

[0014] According to another aspect of the present invention, a computer-readable storage medium is also provided, the computer-readable storage medium including a stored executable program, wherein, when the executable program is executed, it controls the device where the computer-readable storage medium is located to perform the methods of various embodiments of the present invention.

[0015] According to another aspect of the present invention, a computer program product is also provided, including a computer program that, when executed by a processor, implements the methods of various embodiments of the present invention.

[0016] According to another aspect of the present invention, a computer program product is also provided, including a non-volatile computer-readable storage medium storing a computer program that, when executed by a processor, implements the methods of various embodiments of the present invention.

[0017] According to another aspect of the present invention, a computer program is also provided, which, when executed by a processor, implements the methods of the various embodiments of the present invention.

[0018] In this embodiment of the invention, a flushing method for a hybrid transmission valve body is provided, comprising: acquiring driving status information of the hybrid vehicle during driving, 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 status information to flush the pressure relief valve, and obtaining 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 degree of blockage of the pressure relief valve is less than the degree of blockage of the pressure relief valve before flushing. It is noteworthy that this application proposes to control the operating state of the oil pump in the transmission based on the driving status information of the hybrid vehicle to flush the pressure relief valve. This can be performed during normal vehicle operation without the need for an additional flushing device in the hybrid transmission. By controlling the flow state of the transmission fluid in the transmission fluid circuit, the oil pump flushes the pressure relief valve, removing impurities and dirt from it and maintaining its normal operating condition. This effectively ensures the normal operation of the hybrid transmission, extends the service life of the pressure relief valve and the hybrid transmission, and improves the overall performance and reliability of the hybrid vehicle. Thus, it solves the technical problem of low efficiency in flushing valve bodies in hybrid transmissions in related technologies. Attached Figure Description

[0019] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

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

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

[0022] Figure 3 This is a schematic diagram showing the relationship between the optional throttle orifice opening area and the clutch internal pressure according to an embodiment of the present invention;

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

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

[0025] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort 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, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0027] According to an embodiment of the present invention, an embodiment of a flushing method for a hybrid transmission valve body is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0028] Figure 1 This is a flowchart of a flushing method for a hybrid transmission valve body according to an embodiment of the present invention, such as... Figure 1 As shown, the method includes the following steps:

[0029] Step S102: During the operation of the hybrid vehicle, obtain the driving status information of the hybrid vehicle.

[0030] Hybrid vehicles include 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.

[0031] The aforementioned hybrid vehicles refer to vehicles equipped with both an engine and an electric motor. During driving, they can automatically switch between using the engine and / or the electric motor to drive the vehicle depending on different conditions. Based on the ratio and operating mode of the electric motor and engine, hybrid vehicles can be divided into parallel hybrid vehicles, road hybrid vehicles, and series hybrid vehicles. Parallel hybrid vehicles refer to vehicles where both the engine and electric motor are connected to the wheels. The engine and electric motor can work independently or collaboratively. The engine is mainly used for high-speed driving or long-distance driving, while the electric motor is mainly used for low-speed driving or acceleration. Road hybrid vehicles refer to vehicles where the engine is mainly used to generate electricity, which powers the electric motor via a generator, and the electric motor then drives the vehicle. The engine and electric motor can work independently or collaboratively to improve fuel economy and reduce emissions. Series hybrid vehicles refer to vehicles where the engine is only used to generate electricity, which powers the electric motor via a generator, and the electric motor directly drives the wheels. This can significantly reduce engine fuel consumption and emissions. In actual use, hybrid vehicles can automatically switch the operating modes of the engine and electric motor according to driving conditions to achieve better fuel efficiency and performance. The specific type of hybrid vehicle mentioned above can be determined according to actual needs and is not limited here.

[0032] The aforementioned driving status information refers to various data and parameters of a hybrid vehicle during operation, used to represent the vehicle's operating status, performance, and efficiency. This driving status information may include, but is not limited to, engine operating status, electric motor operating status, energy flow, vehicle speed and acceleration, energy utilization rate, transmission operating status, and vehicle mileage information. Engine operating status may include engine speed, throttle opening, and fuel consumption; electric motor operating status may include electric motor output power, battery charge, and charging status; energy flow may include energy conversion and utilization, such as the conversion of engine output power into power to drive the vehicle and the supply of electrical energy; vehicle speed and acceleration may include the vehicle's real-time speed and acceleration; energy utilization rate may include fuel consumption rate and battery charging and discharging efficiency; and transmission operating status may include various transmission operating parameters. The aforementioned driving status information can be determined according to actual needs and is not limited here.

[0033] The aforementioned hybrid transmission can refer to a transmission installed in 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 status and driving needs, 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 are not limited here.

[0034] The aforementioned transmission oil pan can refer to the container used to hold transmission fluid in a hybrid transmission. The transmission oil pan can be located at the bottom of the transmission and serves to store transmission fluid and protect internal parts. The transmission oil pan can be made of metal or aluminum alloy to ensure that the transmission fluid does not leak, protect transmission parts, reduce friction and wear, and extend the service life of the transmission.

[0035] The aforementioned oil pump can refer to a device in a hybrid transmission used to transfer lubricating oil and coolant. The oil pump draws lubricating oil and coolant from the oil tank and delivers them to the transmission by means of rotation or pressure pumping, so as to ensure the lubrication and cooling of various internal components of the transmission. The oil pump can be an electric oil pump, etc. The specific type of oil pump can be determined according to actual needs, and is not limited here.

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

[0037] The aforementioned transmission fluid circuit can refer to the transmission fluid flow circuit consisting of the transmission oil pan, oil pump, and pressure relief valve. The transmission fluid can flow from the transmission oil pan through the oil pump, then through the pressure relief valve, and finally back to the transmission oil pan to form the transmission fluid flow circuit. The specific transmission fluid circuit can be determined according to actual needs, and is not limited here.

[0038] In one optional embodiment, during the operation of the hybrid vehicle, driving status information of the hybrid vehicle can be acquired. The hybrid transmission is equipped with a transmission oil pan, an oil pump, and a pressure relief valve. The oil pump circulates transmission oil to various components and maintains stable oil pressure. The pressure relief valve is used to regulate oil pressure to ensure normal operation of the transmission. When the transmission is working, the transmission oil flows to various components for lubrication and cooling, and also carries away the heat generated by component friction. Specifically, driving status information of the hybrid vehicle can be acquired. The operating status of the hybrid transmission can be monitored by sensors, including parameters such as transmission speed, oil temperature, and oil pressure. Through the above steps, driving status information of the hybrid vehicle can be acquired during operation, providing data support for subsequent control of the operating status of the oil pump in the hybrid transmission.

[0039] Step S104: Control the operating status of the oil pump based on the driving condition information to flush the pressure relief valve and obtain the 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. The flushing result indicates that the degree of blockage of the pressure relief valve is less than that before flushing.

[0041] In one optional embodiment, the operating state of the oil pump can be controlled based on driving condition information to flush the pressure relief valve. Specifically, the vehicle's driving condition information, including vehicle speed, throttle opening, and engine speed, can be collected in real time through vehicle sensors and control units. Based on the collected driving condition information, the system can analyze and evaluate whether the necessary conditions for performing the flushing step are met and the degree of blockage in the pressure relief valve, determining whether a flushing operation is necessary. Based on the analysis results, the operating state of the oil pump can be controlled to flush the pressure relief valve by adjusting the flow state of the transmission fluid in the transmission fluid circuit. The oil pump controls the flow of transmission fluid, flushing it through the pressure relief valve to remove impurities and blockages, ensuring its proper functioning. After flushing, the system uses sensors and a control unit to re-detect the degree of blockage, ensuring it is less clogged than before. These steps allow for timely flushing based on vehicle driving conditions, guaranteeing proper valve operation, improving transmission performance and lifespan, and providing feedback and adjustments based on flushing results for effective management and maintenance of the pressure relief valve.

[0042] In this embodiment of the invention, a flushing method for a hybrid transmission valve body is provided, comprising: acquiring driving status information of the hybrid vehicle during driving, 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 status information to flush the pressure relief valve, and obtaining 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 degree of blockage of the pressure relief valve is less than the degree of blockage of the pressure relief valve before flushing. It is noteworthy that this application proposes to control the operating state of the oil pump in the transmission based on the driving status information of the hybrid vehicle to flush the pressure relief valve. This can be performed during normal vehicle operation without the need for an additional flushing device in the hybrid transmission. By controlling the flow state of the transmission fluid in the transmission fluid circuit, the oil pump flushes the pressure relief valve, removing impurities and dirt from it and maintaining its normal operating condition. This effectively ensures the normal operation of the hybrid transmission, extends the service life of the pressure relief valve and the hybrid transmission, and improves the overall performance and reliability of the hybrid vehicle. Thus, it solves the technical problem of low efficiency in flushing valve bodies in hybrid transmissions in related technologies.

[0043] Optionally, the operating state of the oil pump is controlled based on driving condition information to flush the pressure relief valve and obtain flushing results, including: acquiring preset valve body flushing entry conditions and preset valve body flushing exit conditions, wherein the preset valve body flushing entry conditions are used to indicate the pre-set conditions for controlling the pressure relief valve to trigger flushing, and the preset valve body flushing exit conditions are used to indicate the pre-set conditions for controlling the pressure relief valve to stop flushing; 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.

[0044] In one optional embodiment, preset valve body flushing entry and exit conditions can be obtained. Conditions for triggering flushing of the pressure relief valve can be pre-set, i.e., preset valve body flushing entry conditions. Relevant driving condition information, such as vehicle speed and oil temperature, can be obtained through sensors to determine when flushing of the pressure relief valve is necessary. Preset valve body flushing exit conditions can also be set, i.e., pre-set conditions for stopping flushing of the pressure relief valve, to ensure the effectiveness and safety of the flushing process. Furthermore, based on driving condition information, preset valve body flushing entry and exit conditions, the operating 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 started to inject transmission fluid into the pressure relief valve for flushing. Simultaneously, driving condition information can be monitored, and when the preset valve body flushing exit condition is reached, the oil pump operation is stopped, ending the flushing process of the pressure relief valve. Thus, by using driving condition information, setting preset flushing conditions, and controlling the operating state of the oil pump, the hybrid transmission valve body can be effectively flushed, ensuring its normal operation and extending its 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 includes: determining a target duty cycle signal based on driving condition information, preset valve body flushing entry conditions and preset valve body flushing exit conditions; and controlling the rotation direction and rotation speed of the oil pump based on the target duty cycle information, wherein the rotation direction is used to control the flow direction of the transmission fluid and the rotation speed is used to control the flow speed of the transmission fluid.

[0046] In one 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. This can be the ratio of the opening time to the closing time within the oil pump's working cycle. Then, based on the target duty cycle information, valve body flushing can be achieved by controlling the rotation direction and speed of the oil pump. The rotation direction controls the flow direction of the transmission fluid; for example, high-frequency changes in rotation direction can achieve repeated vibrational impact on blockages in the pressure relief valve, or forward rotation can be set to flush the valve body, and reverse rotation to discharge waste fluid. The rotation speed controls the flow rate of the transmission fluid and the impact force on blockages in the pressure relief valve. The rotation speed can be adjusted as needed to control the flushing effect. Through these steps, the operating status of the oil pump can be controlled during the flushing process of the hybrid transmission valve body, ensuring the effectiveness and stability of the valve body flushing.

[0047] Optionally, the preset valve body flushing entry conditions include at least: the clutch in the hybrid transmission is engaged and the transmission torque of the clutch is less than a first preset torque threshold, where the engagement state indicates that the engine and hybrid transmission in the hybrid vehicle are engaged.

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

[0049] In one optional embodiment, setting preset valve body flushing entry conditions can ensure that valve body flushing is performed under appropriate conditions. The preset valve body flushing entry conditions can include at least the following conditions: the clutch in the hybrid transmission is engaged and the transmission torque of the clutch is less than a first preset torque threshold. The clutch being engaged indicates that the engine and hybrid transmission in the hybrid vehicle are engaged, meaning the engine's power can be transmitted to the transmission. In this case, the oil pump controls the flow of transmission fluid into the clutch oil circuit. Considering the structure and position of the pressure relief valve in the transmission, the conditions for controlling the oil pump to flush the pressure relief valve are met. The clutch transmission torque being less than the first preset torque threshold indicates that the transmission is operating under low load, which is more suitable for flushing the pressure relief valve. Triggering valve body flushing by controlling the magnitude of the clutch transmission torque avoids unnecessary flushing operations under high load conditions, saving energy and reducing costs. Setting preset valve body flushing entry conditions ensures that valve body flushing is performed under appropriate time and conditions, improving the performance and reliability of the hybrid transmission system and extending its service life.

[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 transmission torque demand of the clutch is greater than a second preset torque threshold, and the flushing duration of flushing the pressure relief valve is greater than a preset duration 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 a first preset torque threshold.

[0051] The aforementioned torque transmission requirement can refer to the torque required by the vehicle control system to be transmitted to the clutch.

[0052] The aforementioned second preset torque threshold can refer to a pre-set threshold used to measure the torque transmission requirements of the clutch. For example, the second preset torque threshold can be set to 80 N·m. The second preset torque threshold can be determined according to actual needs, and is not limited here.

[0053] In one optional embodiment, setting a preset valve body flushing exit condition can ensure that the hybrid transmission valve body exits the flushing state at an appropriate time to guarantee 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 when the clutch is disengaged, there is no torque transmission between the engine and the hybrid transmission. Considering the structure and position of the pressure relief valve in the transmission, it is suitable to continue the flushing operation at this time. When the torque requirement of the clutch is greater than a 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 exceeds a preset time threshold, the valve body can also exit the flushing process, which can prevent excessively long flushing operations, avoid wasting resources and potential adverse effects. Through the above settings, it can be ensured that the hybrid transmission valve body exits the flushing state under appropriate conditions, improving the efficiency and reliability of the system and ensuring 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. This includes: 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 and the opening / closing state of the throttle orifice in the pressure relief valve to flush the pressure relief valve. The opening / closing state of the throttle orifice is used to change the hydraulic pressure of the transmission oil flowing through the pressure relief valve.

[0055] In one 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 orifice in the pressure relief valve can be controlled based on driving condition information, preset valve body flushing entry conditions, and preset valve body flushing exit conditions to flush the pressure relief valve. Specifically, the operating state of the oil pump can be controlled according to driving condition information and set flushing conditions, and the opening and closing state of the throttle orifice in the pressure relief valve can be controlled to change the fluid pressure of the transmission oil flowing through the pressure relief valve. According to the flushing entry and exit conditions 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 orifice to remove any dirt or impurities that may exist, ensuring the normal operation of the pressure relief valve. By flushing the pressure relief valve based on driving condition information and preset conditions, the normal operation of the pressure relief valve can be ensured, improving the efficiency and reliability of the hybrid transmission, extending the service life of the hybrid transmission, reducing the possibility of failure, and improving the overall performance and driving experience of the vehicle.

[0056] The technical solution proposed in this application is described below in conjunction with an optional application scenario. This application relates to a valve body flushing method for a hybrid-specific transmission. In recent years, the clutch action execution control scheme of the direct-controlled oil pump clutch has been widely used due to its advantages such as relatively low cost, low power consumption, and short development cycle. For this clutch execution scheme, a pressure relief valve is added to its clutch oil circuit to throttle the oil discharge path from the oil pump to the clutch execution oil chamber, which can further reduce the power consumption of the oil pump 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 throttling orifice is in the closed state. When the pressure in the execution oil chamber is higher than the opening pressure of the pressure relief valve, the throttling orifice opens, and the oil in the oil pan flows back to the oil pan through the oil pump, oil circuit, and pressure relief valve, forming a loop. The addition of the pressure relief valve can achieve a higher clutch execution oil chamber pressure with a lower flow requirement. When the opening of the throttling orifice is small, due to the cleanliness of the oil, the throttling orifice is easily blocked, resulting in unstable pressure and flow, which in turn causes the clutch to fail to form a stable engagement state.

[0057] This application proposes a valve body flushing method for a hybrid transmission. Addressing the aforementioned cleanliness issues, a dedicated cleaning strategy is designed to clean the internal structure of the valve body, thereby helping to achieve stable pressure and flow control in the clutch actuator oil chamber. The clutch operation scheme consists of three parts: the clutch oil circuit, the pressure relief valve, and the hydraulic oil pump. When clutch engagement is required, a duty cycle command is sent to the oil pump controller to induce forward rotation of the oil pump. When the pressure is lower than the pressure relief valve's relief pressure, the valve closes, and the oil pump flow is fully injected into the clutch oil chamber. When the pressure is higher than the pressure relief valve's pressure, the valve opens, achieving throttling through the pressure relief valve's throttling orifice, thus controlling the clutch pressure. There is a corresponding relationship between the clutch build-up pressure and the duty cycle. When the duty cycle is small, less than and far from 0%, a larger valve body throttling orifice area can be achieved; when the duty cycle is large, less than and close to 0%, the throttling orifice can be closed. Utilizing this characteristic, a dedicated valve body flushing action can be designed to clean the valve body, achieving long-term, stable pressure control.

[0058] As described above, rapid valve body movement can shake off contaminants within the valve body, and a larger flow rate can remove contaminants. Based on the above analysis, a hybrid transmission valve body flushing scheme can be designed as follows: The valve body flushing function activation condition design can determine the clutch working state. When the following working state conditions are met, the flushing action can be performed. The following working conditions are related as follows: the current hybrid system is in parallel, the clutch transmission torque is less than 50 Nm, the accelerator pedal opening is greater than 10%, the transmission oil temperature is greater than 60℃, the continuous driving 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 is designed to exit under the following conditions (which are either one or the other): 1. The clutch torque requirement exceeds 80 Nm. Pressure fluctuations during the flushing process may affect clutch torque transmission, so the function must exit when this requirement changes. 2. The clutch controller receives a disengagement command, and the current operating state no longer meets the flushing requirements, thus the function must exit. 3. The clutch actuator malfunctions, and the current operating state no longer meets the flushing requirements, thus the function must exit. 4. The actual clutch pressure is too low during flushing. Continuing the flushing process may further reduce the clutch pressure, so the function must exit. 5. The flushing process ends, and the function exits.

[0060] The valve body flushing action design may include using the duty cycle corresponding to the current clutch demand pressure as the initial duty cycle A, and -100% duty cycle as the target duty cycle B, and performing square wave control. In this way, while ensuring the clutch engagement pressure, the throttle orifice opens and closes three times. During this process, due to the pressure change, the valve core fluctuates up and down, and the flow rate also fluctuates up and down. The dirt 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 This 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 The figure shows an optional connection between the clutch, pressure relief valve, oil pump, one-way valve, back valve and transmission oil pan in a hybrid transmission. The multiple transmission oil pans shown in the figure can actually be a single unit.

[0062] Figure 3 This is a schematic diagram illustrating an optional relationship between the orifice opening area and the clutch internal pressure according to an embodiment of the present invention. It shows an optional relationship between the orifice opening area and the clutch internal pressure, thereby allowing the appropriate orifice opening area to be determined based on the clutch internal pressure, achieving more efficient flushing of the pressure relief valve.

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

[0064] According to another aspect of the present invention, a flushing device for a hybrid transmission valve body is also provided. This device can perform the flushing method for the hybrid transmission valve body described in the above embodiments. The specific implementation method and preferred application scenarios are the same as those described in the above embodiments, and will not be repeated here.

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

[0066] The acquisition module is used to acquire driving status information of the hybrid vehicle during operation. 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. The control module is used to control the operating state of the oil pump based on the driving status information to flush the pressure relief valve and obtain the flushing result. The oil pump flushes the pressure relief valve by controlling the flow state of the transmission oil in the transmission oil circuit. The flushing result is used to indicate that the degree of blockage of the pressure relief valve is less than the degree of blockage of the pressure relief valve before flushing.

[0067] The control module is also used to acquire preset valve body flushing entry conditions and preset valve body flushing exit conditions. The preset valve body flushing entry conditions represent the pre-set conditions for triggering flushing of the pressure relief valve by the control, and the preset valve body flushing exit conditions represent the pre-set conditions for stopping flushing of the pressure relief valve by the control. Based on the driving status information, the preset valve body flushing entry conditions and the preset valve body flushing exit conditions, the module controls the operating status of the oil pump to flush the pressure relief valve.

[0068] The operating status 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; and to control the rotation direction and rotation speed of the oil pump based on the target duty cycle information, wherein the rotation direction is used to control the flow direction of the transmission fluid and the rotation speed is used to control the flow speed of the transmission fluid.

[0069] The preset valve body flushing entry conditions include 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. The engaged state is used to indicate that the engine and hybrid transmission in the hybrid vehicle are in an engaged state.

[0070] 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 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. The disengaged state indicates that the engine and hybrid transmission in the hybrid vehicle are in a disengaged state, and the second preset torque threshold is greater than a first preset torque threshold.

[0071] The control module is also used to control the operating status of the oil pump and the opening and closing status of the throttle orifice in the pressure relief valve based on driving status information, preset valve body flushing entry conditions and preset valve body flushing exit conditions, so as to flush the pressure relief valve. The opening and closing status of the throttle orifice is used to change the hydraulic pressure of the transmission oil flowing through the pressure relief valve.

[0072] Embodiments of this application also provide an electronic device, including: 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 during runtime.

[0073] The aforementioned memory can refer to devices inside a computer used to store data and programs, including RAM, hard disks, etc. RAM can be used to temporarily store running programs and data, while hard disks can be used to store programs and data long-term. Memory enables the computer to read and write data and execute programs. The aforementioned processor is responsible for executing instructions in computer programs and performing data processing. It can also be responsible for controlling and executing various operations, including arithmetic operations, logical operations, and data transmission.

[0074] Embodiments of this application also provide a computer-readable storage medium including a stored executable program, wherein, when the executable program is executed, it controls the device where the computer-readable storage medium is located to perform the methods of various embodiments of the present invention.

[0075] The aforementioned computer storage media can refer to the media used in computer memory to store certain discontinuous physical quantities. Computer storage media mainly include semiconductors, magnetic cores, magnetic drums, magnetic tapes, laser discs, etc. Computer-readable storage media include stored programs, which can be a set of instructions that a computer can recognize and execute, running on an electronic computer to meet certain information needs.

[0076] Embodiments of this application also provide a computer program product, including a computer program that, when executed by a processor, implements the methods of various embodiments of the present invention.

[0077] The aforementioned computer program products can refer to software programs that have been written, tested, and released, and can run on computers or other devices. Computer program products can include application programs, operating systems, utility software, etc., used to achieve specific functions or solve specific problems.

[0078] Embodiments of this application also provide a computer program product, including a non-volatile computer-readable storage medium for storing a computer program that, when executed by a processor, implements the methods in various embodiments of the present invention.

[0079] The aforementioned non-volatile computer-readable storage medium can refer to a medium for storing data. Non-volatile computer-readable storage media can retain data without loss when power is off and can be used to store long-term data, such as operating systems, applications, and user files. Non-volatile storage media can include hard disk drives, solid-state drives, optical disks, and flash memory storage devices, etc.

[0080] Embodiments of this application also provide a computer program that, when executed by a processor, implements the methods described in the various embodiments of the present invention.

[0081] The aforementioned computer program can refer to a set of instructions used to tell the computer to perform specific tasks or operations. Computer programs can be written by programmers using specific programming languages ​​and can include algorithms, data structures, logic, and control flow. Computer programs can be used for a variety of purposes, including application software, operating systems, etc.

[0082] In the above embodiments of the present invention, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer 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. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.

[0084] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0085] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0086] If the integrated unit is implemented as 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. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0087] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A flushing method for a hybrid transmission valve body, characterized in that, include: During the operation of the hybrid vehicle, the driving status information of the hybrid vehicle is acquired, 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. The operating state of the oil pump is controlled based on the driving condition information to flush the pressure relief valve and obtain a flushing result. The oil pump flushes the pressure relief valve by controlling the flow state of the transmission fluid in the transmission fluid circuit. The flushing result is used to indicate that the degree of blockage of the pressure relief valve is less than the degree of blockage of the pressure relief valve before flushing. The method further includes: obtaining preset valve body flushing entry conditions, wherein the preset valve body flushing entry conditions are used to represent the pre-set conditions for triggering flushing of the pressure relief valve by control, and the preset valve body flushing entry conditions include 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, wherein the engaged state is used to represent that the engine and the hybrid transmission in the hybrid vehicle are in an engaged state.

2. The flushing method for the hybrid transmission valve body according to claim 1, characterized in that, Based on the driving condition information, the operating state of the oil pump is controlled to flush the pressure relief valve, and the flushing result includes: Obtain a preset valve body flushing exit condition, wherein the preset valve body flushing exit condition is used to represent a pre-set condition for controlling the cessation of flushing of the pressure relief valve; Based on the driving status information, the preset valve body flushing entry conditions, and the preset valve body flushing exit conditions, the operating state of the oil pump is controlled to flush the pressure relief valve.

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

4. The flushing method for the 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 requirement of the clutch is greater than a second preset torque threshold, and the flushing duration of flushing the pressure relief valve is greater than a preset duration 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.

5. The flushing method for the hybrid transmission valve body according to claim 2, characterized in that, Based on the driving status 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, including: Based on the driving status 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 orifice in the pressure relief valve are controlled to flush the pressure relief valve. The opening and closing state of the throttle orifice is used to change the hydraulic pressure of the transmission oil flowing through the pressure relief valve.

6. A flushing device for a hybrid transmission valve body, characterized in that, include: The acquisition module is used to acquire driving status information of the hybrid vehicle during driving, 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. 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. The oil pump flushes the pressure relief valve by controlling the flow state of the transmission oil in the transmission oil circuit. The flushing result is used to indicate that the degree of blockage of the pressure relief valve is less than the degree of blockage of the pressure relief valve before flushing. The control module is also used to acquire preset valve body flushing entry conditions, wherein the preset valve body flushing entry conditions are used to represent the conditions for the pre-set control to trigger flushing of the pressure relief valve, and the preset valve body flushing entry conditions include 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, wherein the engaged state is used to represent that the engine and the hybrid transmission in the hybrid vehicle are in an engaged state.

7. An electronic device, characterized in that, include: Memory, which stores executable programs; A processor for running the program, wherein the program, when running, performs the flushing method for the hybrid transmission valve body according to any one of claims 1 to 5.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored executable program, wherein, when the executable program is executed, it controls the device on which the storage medium is located to perform the flushing method for the hybrid transmission valve body according to any one of claims 1 to 5.

9. A computer program product, characterized in that, Includes a computer program that, when executed by a processor, implements the flushing method for the hybrid transmission valve body according to any one of claims 1 to 5.

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