A control method and device for a dual-source electric oil pump for a gearbox

Abstract

The application discloses a control method for a dual-source electric oil pump of a gearbox, and the method comprises the following steps: acquiring handle gear position information and gearbox input and output rotating speed information; judging whether the gearbox is in the N gear state and the gearbox output rotating speed is 0; if yes, the electric oil pump is closed; if not, the electric oil pump is started, working condition information is acquired, and the target rotating speed of the electric oil pump is set according to the working condition information; while the electric oil pump is started, the power supply voltage of a power battery is acquired; if the power supply voltage of the power battery is less than a corresponding threshold value, the input power supply of the electric oil pump is faulty, the input power supply of the electric oil pump is switched from the power battery to a backup battery, the driving motor is controlled to be closed, the gearbox is controlled to return to the N gear, and the rotating speed of the electric oil pump is controlled to be gradually reduced until the electric oil pump is closed; the application subdivides the working condition of the electric oil pump, different control strategies are adopted according to different working conditions, and on the basis of sufficiently reducing energy consumption, the stability and safety of the gearbox are ensured.

Description

Technical Field

[0001] This invention relates to the field of engineering machinery technology, and in particular to a dual-source electric oil pump control method and device for gearboxes. Background Technology

[0002] With the increasing demand for energy conservation and emission reduction in the construction machinery market, an electric fully automatic transmission has been developed to address this need. To achieve uninterrupted power control, the electric fully automatic transmission uses a wet clutch for power transmission. Considering the overall machine requirements, a mechanical pump is no longer used; instead, an electric oil pump provides the necessary pressure and lubrication flow for the fully automatic transmission.

[0003] In the field of automatic transmissions, electric oil pumps are widely used due to their flexible and versatile control methods, simple operation, and energy efficiency. The real-time speed of the electric oil pump is controlled primarily based on target control pressure and oil temperature, according to the cooling and lubrication flow requirements and shifting needs of the automatic transmission. Although power loss of the electric oil pump can be reduced through optimization of the control strategy, the effect is not significant.

[0004] How to meet the requirements of clutch cooling and lubrication flow and gear shifting under different modes, and how to achieve energy-saving control of electric oil pumps under different modes and operating conditions are technical problems that urgently need to be solved in this field. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a dual-source electric oil pump control method and device for gearboxes, thereby solving the technical problem of unsatisfactory power consumption caused by the existing electric oil pump control method.

[0006] In a first aspect, the present invention provides a dual-source electric oil pump control method for a transmission, comprising:

[0007] Obtain the lever gear position information and the gearbox input / output speed information;

[0008] Based on the lever position information and the gearbox input / output speed information, determine whether the gearbox is in neutral (N) and whether the gearbox output speed is 0:

[0009] If so, then shut down the electric oil pump;

[0010] If not, start the electric oil pump, obtain the operating condition information, and set the target speed of the electric oil pump according to the operating condition information.

[0011] Optionally, acquiring operating condition information and setting the target speed of the electric oil pump based on the operating condition information includes:

[0012] Get the controller's position information;

[0013] Determine whether the gearbox is in a shifting state based on the lever position information:

[0014] If the gear shift is in progress, obtain the electric hydraulic pump speed value n corresponding to the flow rate required by the engaged clutch and the clutch to be disengaged during the gear shift process. OC n OG The drive motor output speed n MCU The coefficient k that matches the output speed of the drive motor MCU ;

[0015] Based on the electric oil pump speed value n OC n OG , drive motor output speed n MCU coefficient k MCU Calculate the target rotational speed n EOP :

[0016] n EOP =max{n OC n OG}+k MCU ×n MCU +n min

[0017] If it is in gear, then obtain the output torque T of the drive motor during the gearing process. MCU The coefficient k that matches the output torque of the drive motor T，MCU The overall vehicle speed V TCU The coefficient k that matches the overall vehicle speed V,TCU ;

[0018] Based on the output torque T of the drive motor MCU coefficient k T，MCU Overall vehicle speed V TCU coefficient k V，TCU Calculate the target rotational speed n EOP :

[0019] n EOP =k T,MCU ×T MCU +k V,TCU ×V TCU +n min

[0020] In the formula, n min This is the minimum required speed for the electric oil pump.

[0021] Optionally, during gear shifting, if n MCU <n MCU，Th Let k MCU ×n MCU =0; n MCU，Th This is the threshold value for the output speed of the drive motor;

[0022] During the blocking process, if T MCU <T Th Let k T，MCU ×T MCU =0; if V TCU <V Th Let k V，TCU ×V TCU =0;T Th V is the threshold value for the output torque of the drive motor. Th This is the threshold speed for the entire vehicle.

[0023] Optionally, when starting the electric oil pump, initialize the electric oil pump speed to the minimum required speed n. min .

[0024] Optionally, while starting the electric oil pump, activate the electric oil pump input power fault detection function:

[0025] Obtain the power supply voltage U of the power battery EOP ;

[0026] If U EOP <U Th U Th If the power supply voltage threshold of the power battery is reached, and the electric oil pump input power fails, the input power of the electric oil pump will be switched from the power battery to the backup battery, the drive motor will be shut down, the gearbox will be returned to neutral, and the speed of the electric oil pump will be gradually reduced until it is shut down.

[0027] If U EOP ≥U Th If so, the electric oil pump input power supply is normal.

[0028] In a second aspect, the present invention provides a dual-source electric oil pump control device for a transmission, the device comprising:

[0029] The information acquisition module is used to acquire the gear position information of the lever and the input and output speed information of the gearbox;

[0030] The logic judgment module is used to determine whether the gearbox is in N gear and the gearbox output speed is 0 based on the lever gear position information and the gearbox input and output speed information.

[0031] If the logic execution module is active, it shuts down the electric oil pump; otherwise, it turns on the electric oil pump, acquires operating condition information, and sets the target speed of the electric oil pump based on the operating condition information.

[0032] Optionally, acquiring operating condition information and setting the target speed of the electric oil pump based on the operating condition information includes:

[0033] Get the controller's position information;

[0034] Determine whether the gearbox is in a shifting state based on the lever position information:

[0035] If the gear shift is in progress, obtain the electric hydraulic pump speed value n corresponding to the flow rate required by the engaged clutch and the clutch to be disengaged during the gear shift process. OC n OG The drive motor output speed n MCU The coefficient k that matches the output speed of the drive motor MCU ;

[0036] Based on the electric oil pump speed value n OC n OG , drive motor output speed n MCU coefficient k MCU Calculate the target rotational speed n EOP :

[0037] n EOP =max{n OC n OG}+k MCU ×n MCU +n mmin

[0038] If it is in gear, then obtain the output torque T of the drive motor during the gearing process. MCU The coefficient k that matches the output torque of the drive motor T，MCU The overall vehicle speed V TCU The coefficient k that matches the overall vehicle speed V,TCU ;

[0039] Based on the output torque T of the drive motor MCU coefficient k T，MCU Overall vehicle speed V TCU coefficient k V，TCU Calculate the target rotational speed n EOP :

[0040] n EOP =k T，MCU ×T MCU +k V，TCU ×V TCU +n min

[0041] In the formula, n min This is the minimum required speed for the electric oil pump.

[0042] Optionally, while starting the electric oil pump, activate the electric oil pump input power fault detection function:

[0043] Obtain the power supply voltage U of the power battery EOP ;

[0044] If U EOP <U Th U Th If the power supply voltage threshold of the power battery is reached, and the electric oil pump input power fails, the input power of the electric oil pump will be switched from the power battery to the backup battery, the drive motor will be shut down, the gearbox will be returned to neutral, and the speed of the electric oil pump will be gradually reduced until it is shut down.

[0045] If U EOP ≥U Th If so, the electric oil pump input power supply is normal.

[0046] Thirdly, the present invention provides an electronic device, including a processor and a storage medium;

[0047] The storage medium is used to store instructions;

[0048] The processor is used to perform the steps of the above method according to the instructions.

[0049] Fourthly, the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the above-described method.

[0050] Compared with the prior art, the beneficial effects achieved by the present invention are as follows:

[0051] The present invention provides a dual-source electric oil pump control method and device for a transmission, which subdivides the operating conditions of the electric oil pump, namely whether the transmission is in a safe stationary state or whether the transmission is in a shifting state, and adopts different control strategies for different operating conditions, so as to ensure the stability and safety of the transmission while fully reducing energy consumption. Attached Figure Description

[0052] Figure 1 This is a schematic flowchart of the dual-source electric oil pump control method for a gearbox provided in an embodiment of the present invention;

[0053] Figure 2 This is a schematic diagram of the process for setting the target speed of the electric oil pump based on operating condition information, provided in an embodiment of the present invention.

[0054] Figure 3 This is a connection diagram of the dual-source electric oil pump control device for a gearbox provided in an embodiment of the present invention. Detailed Implementation

[0055] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0056] Example 1:

[0057] like Figure 1 As shown, this embodiment of the invention provides a dual-source electric oil pump control method for a transmission, comprising the following steps:

[0058] Step S1: Obtain the gear position information of the lever and the input and output speed information of the gearbox.

[0059] Step S2: Determine whether the transmission is in neutral (N) and the transmission output speed is 0 based on the lever position information and the transmission input / output speed information.

[0060] If so, the electric oil pump will be shut down. When the transmission is in neutral (N) and the transmission output speed is 0, meaning the transmission is in a safe and stationary state, it indicates that the transmission does not currently require the engagement of the wet clutch and that the bearings and gears do not require lubrication. In this case, a command to shut down the electric oil pump can be sent to stop the electric oil pump's speed and stop the power battery's energy output to the oil pump motor, thus achieving full energy saving.

[0061] If not, start the electric oil pump, obtain operating condition information, and set the target speed of the electric oil pump according to the operating condition information.

[0062] When starting the electric oil pump, and before setting the target speed of the electric oil pump, initialize the speed of the electric oil pump to the minimum required speed n. min n min The rotational speed is determined based on the total flow required by the bearings, gears, and default clutch assembly inside the gearbox.

[0063] like Figure 2 As shown, in this embodiment, obtaining operating condition information and setting the target speed of the electric oil pump based on the operating condition information includes:

[0064] Step S2.1: Obtain the handle's gear position information;

[0065] Step S2.2: Determine whether the gearbox is in shifting mode based on the gear position information of the lever:

[0066] Step S2.2.1: If in gear shifting mode, obtain the electric oil pump speed value n corresponding to the flow rate required by the engaged clutch and the clutch to be disengaged during the gear shifting process. OC、 n OG The drive motor output speed n MCU The coefficient k that matches the output speed of the drive motor MCU ;

[0067] Based on the electric oil pump speed value n OC n OG , drive motor output speed n MCU coefficient k MCU Calculate the target rotational speed n EOP :

[0068] n EOP =max{n OC n OG}+k MCU ×n MCU +n min

[0069] During gear shifting, if n MCU <n MCU，Th Let k MCU ×n MCU =0; n MCU，Th This is the threshold value for the output speed of the drive motor;

[0070] Specifically:

[0071] n OC Speed ​​acquisition: Calculate the required lubrication flow rate (unit: L / min) for this clutch assembly based on the friction coefficient and friction area of ​​the friction plates in the clutch assembly to be engaged. Then, divide the lubrication flow rate by the theoretical displacement (unit: ml / r) of the electric oil pump to obtain the electric oil pump speed value corresponding to the required flow rate.

[0072] n OG Speed ​​acquisition: Calculate the required lubrication flow rate (unit: L / min) for this clutch assembly based on the friction plate coefficient and friction area in the clutch assembly to be disengaged. Then, divide the lubrication flow rate by the theoretical displacement (unit: ml / r) of the electric oil pump to obtain the electric oil pump speed value corresponding to the required flow rate.

[0073] n MCU The motor speed is transmitted in real time by the motor controller via the CAN bus and can be obtained in real time through the TCU communication CAN port.

[0074] k MCU The coefficient matching the output speed of the drive motor can be obtained based on the actual vehicle calibration. The principle is that when the drive motor is at its maximum output speed, the output speed given by the electric oil pump should not exceed the maximum allowable speed of the electric oil pump. The corresponding relationship can be preset as [n MCU，Th The coefficient corresponding to the maximum speed of the drive motor is [0 (maximum speed of electric oil pump - n)]. min- max{n OC n OG}) / Maximum speed of drive motor].

[0075] During gear shifting, the target speed of the electric oil pump is determined comprehensively based on the output speed of the drive motor and the shifting conditions. This can prevent the system pressure and flow rate from dropping excessively due to insufficient fixed flow rate caused by excessively high output speed of the drive motor. Furthermore, setting the target speed according to different clutches that are disengaged and engaged can avoid flow rate differences caused by different clutch capacities.

[0076] Step S2.2.2: If the vehicle is in gear, obtain the output torque T of the drive motor during the gearing process. MCU The coefficient k that matches the output torque of the drive motor T，MCU The overall vehicle speed V TCU The coefficient k that matches the overall vehicle speed V，TCU ;

[0077] Based on the output torque T of the drive motor MCU coefficient k T，MCU Overall vehicle speed V TCU coefficient k V，TCU Calculate the target rotational speed n EOP :

[0078] n EOP =k T，MCU ×T MCU +k V，TCU ×V TCU +n nin

[0079] In the formula, n min This is the minimum required speed for the electric oil pump;

[0080] During the blocking process, if T MCU <T Th Let k T，MCU ×T MCU =0; if V TCU <V Th Let k V，TCU ×V TCU =0;T Th V is the threshold value for the output torque of the drive motor. Th This is the threshold speed for the entire vehicle.

[0081] Specifically:

[0082] T MCU The output torque of the drive motor is sent in real time by the motor controller via the CAN bus and can be obtained in real time through the TCU communication CAN port.

[0083] k T，MCUThe coefficient matching the output torque of the drive motor can be obtained from the actual vehicle calibration. The principle is that when the drive motor outputs maximum torque, the output speed given by the electric oil pump should not exceed the maximum allowable speed of the electric oil pump. The corresponding relationship can be preset as [T]. Th The coefficient corresponding to the maximum output torque of the drive motor is [0 (maximum speed of electric oil pump - n)]. min ( / maximum output torque of the drive motor).

[0084] V TCU The overall vehicle speed is calculated in real time using the output shaft speed sensor signal integrated into the gearbox, along with the drive axle speed ratio and tire radius.

[0085] k V，TCU The coefficient matching the overall vehicle speed can be obtained from actual vehicle calibration. The principle is that at the highest vehicle speed, the output speed given by the electric oil pump should not exceed the maximum allowable speed of the electric oil pump. The corresponding relationship can be preset as [V]. Th The coefficient corresponding to the maximum vehicle speed is [0 (maximum speed of electric oil pump - n)]. min ( / vehicle's maximum speed).

[0086] When the transmission is in gear n EOP The output speed given under various bias conditions shall not exceed the maximum speed allowed by the electric oil pump.

[0087] During the shifting process, the target speed of the electric oil pump is determined by comprehensively considering the output torque of the drive motor and the output speed of the gearbox. This allows the electric oil pump speed to be increased in advance based on the gearbox status, thereby increasing the lubrication and cooling flow and avoiding problems such as excessive transmission oil temperature caused by excessive transmission output torque and churning losses.

[0088] Step S3: Simultaneously with starting the electric oil pump, activate the electric oil pump input power fault detection.

[0089] Obtain the power supply voltage U of the power battery EOP ;

[0090] If U EOP <U Th U Tn If the power supply voltage threshold of the power battery is met, and the input power of the electric oil pump fails, the input power of the electric oil pump will be switched from the power battery to the backup battery, the drive motor will be shut down, the gearbox will be shifted back to neutral (N), and the speed of the electric oil pump will be gradually reduced until it is shut down; the speed of the electric oil pump can be reduced at a predetermined rate or slope.

[0091] If U EOP ≥U Th If so, the electric oil pump input power is normal and no further control is required;

[0092] In the event of an abnormal power supply from the power battery, the system quickly switches to the backup battery (usually a 24V battery) to prevent the electric oil pump from shutting down abnormally. This ensures that the electric oil pump motor gradually slows down, preventing the drive motor from running away when it has the target torque, thus protecting the drive motor.

[0093] Example 2:

[0094] like Figure 3 As shown, this invention provides a dual-source electric oil pump control system for a transmission, comprising a transmission control unit (TCU), a drive motor control unit (MCU), an electric oil pump control unit (EOP), a vehicle control unit (VCU), a power battery, a 24V battery, a gear shift lever, and an output speed sensor. The MCU and EOP are connected to the power battery via a high-voltage wiring harness, the 24V battery is connected to the EOP via a specific wiring harness, and the gear shift lever and output speed sensor are connected to the TCU. Information exchange between the TCU, MCU, EOP, and VCU is accomplished via a CAN bus.

[0095] The transmission control unit (TCU) receives information from the gear shift lever to determine whether the transmission is in a shifting state and the gear information; it outputs information from the speed sensor to calculate the overall vehicle speed; the TCU collects the actual output torque of the drive motor via the bus; the transmission internally provides a pressurized oil source through the EOP to engage the wet clutch and thus achieve power transmission; it collects the real-time speed of the electric oil pump and transmits it via the CAN bus to determine whether it exceeds the output capacity of the electric oil pump; it also collects the transmission input speed and transmits it via the CAN bus to determine the actual operating state of the transmission. The transmission control unit (TCU) performs system control according to the control method provided in Embodiment 1.

[0096] Example 3:

[0097] This invention provides a dual-source electric oil pump control device for a gearbox, the device comprising:

[0098] The information acquisition module is used to acquire the gear position information of the lever and the input and output speed information of the gearbox;

[0099] The logic judgment module is used to determine whether the gearbox is in neutral (N) and the gearbox output speed is 0 based on the gear position information of the lever and the input and output speed information of the gearbox.

[0100] If the logic execution module is active, it shuts down the electric oil pump; otherwise, it turns on the electric oil pump, acquires operating condition information, and sets the target speed of the electric oil pump based on the operating condition information.

[0101] Specifically, obtaining operating condition information and setting the target speed of the electric oil pump based on that information includes:

[0102] Get the controller's position information;

[0103] Determine whether the gearbox is in shifting mode based on the gear position information on the lever:

[0104] If the gear shift is in progress, obtain the electric hydraulic pump speed value n corresponding to the flow rate required by the engaged clutch and the clutch to be disengaged during the gear shift process. OC n OG The drive motor output speed n MCU The coefficient k that matches the output speed of the drive motor MCU ;

[0105] Based on the electric oil pump speed value n OC n OG , drive motor output speed n MCU coefficient k MCU Calculate the target rotational speed n EOP :

[0106] n EOP =max{n OC n OG}+k MCU ×n MCU +n mmin

[0107] If it is in gear, then obtain the output torque T of the drive motor during the gearing process. MCU The coefficient k that matches the output torque of the drive motor T，MCU The overall vehicle speed V TCU The coefficient k that matches the overall vehicle speed V,TCU ;

[0108] Based on the output torque T of the drive motor MCU coefficient k T，MCU Overall vehicle speed V TCU coefficient k V，TCU Calculate the target rotational speed n EOP :

[0109] n EOP =k T,MCU ×T MCU +k V,TCU ×V TCU +n min

[0110] In the formula, n min This is the minimum required speed for the electric oil pump.

[0111] Specifically, while starting the electric oil pump, simultaneously activate the electric oil pump input power fault detection:

[0112] Obtain the power supply voltage U of the power battery EOP ;

[0113] If U EOP <U Th U Tn If the power supply voltage threshold of the power battery is reached, and the electric oil pump input power fails, the input power of the electric oil pump will be switched from the power battery to the backup battery, the drive motor will be shut down, the gearbox will be returned to neutral, and the speed of the electric oil pump will be gradually reduced until it is shut down.

[0114] If U EOP ≥U Th If so, the electric oil pump input power supply is normal.

[0115] Example 4:

[0116] Based on Embodiment 1, this embodiment of the invention provides an electronic device, including a processor and a storage medium;

[0117] Storage media are used to store instructions;

[0118] The processor is used to perform the steps of the above method according to instructions.

[0119] Example 5:

[0120] Based on Embodiment 1, this embodiment of the invention provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the steps of the above-described method.

[0121] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0122] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0123] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0124] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0125] 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 technical principles 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 control method for a dual-source electric oil pump for a transmission, characterized by, include: Obtain the lever gear position information and the gearbox input / output speed information; Based on the lever position information and the gearbox input / output speed information, determine whether the gearbox is in neutral (N) and whether the gearbox output speed is 0: If so, then shut down the electric oil pump; If not, then start the electric oil pump and obtain operating condition information, and set the target speed of the electric oil pump according to the operating condition information, including: Get the controller's position information; Determine whether the gearbox is in a shifting state based on the lever position information: If the gear shift is in progress, obtain the electric hydraulic pump speed values ​​corresponding to the flow rates required for engaging and disengaging the clutches during the gear shift process. The output speed of the drive motor A coefficient that matches the output speed of the drive motor. ; Based on the electric oil pump speed value , drive motor output speed ,coefficient Calculate the target rotational speed : If it is in gear, then the torque output by the drive motor during the gearing process is obtained. The coefficient that matches the output torque of the drive motor Overall vehicle speed The coefficient that matches the overall vehicle speed ; Based on the output torque of the drive motor ,coefficient Overall vehicle speed ,coefficient Calculate the target rotational speed : In the formula, This is the minimum required speed for the electric oil pump.

2. The dual-source electric oil pump control method for a gearbox according to claim 1, characterized in that, During gear shifting, if Then let ; This is the threshold value for the output speed of the drive motor; During the blocking process, if Then let ;like Then let ; The threshold value for the output torque of the drive motor. This is the threshold speed for the entire vehicle.

3. The dual-source electric oil pump control method for a gearbox according to claim 1, characterized in that, initializing the rotational speed of the electric oil pump to the minimum required rotational speed while the electric oil pump is switched on .

4. The control method of a dual-feed electric oil pump for a transmission according to claim 1, characterized by Simultaneously activate the electric oil pump input power fault detection: Acquiring a supply voltage of a power battery ; like , If the power supply voltage threshold of the power battery is reached, and the electric oil pump input power fails, the input power of the electric oil pump will be switched from the power battery to the backup battery, the drive motor will be shut down, the gearbox will be returned to neutral, and the speed of the electric oil pump will be gradually reduced until it is shut down. If then the electric oil pump input power is normal.

5. A dual-source electric oil pump control device for a gearbox, characterized in that, The device includes: The information acquisition module is used to acquire the gear position information of the lever and the input and output speed information of the gearbox; The logic judgment module is used to determine whether the gearbox is in N gear and the gearbox output speed is 0 based on the lever gear position information and the gearbox input and output speed information. The logic execution module, if the condition is met, shuts down the electric oil pump; otherwise, it turns on the electric oil pump, acquires operating condition information, and sets the target speed of the electric oil pump based on the operating condition information, including: Get the controller's position information; Determine whether the gearbox is in a shifting state based on the lever position information: If the gear shift is in progress, obtain the electric hydraulic pump speed values ​​corresponding to the flow rates required for engaging and disengaging the clutches during the gear shift process. Drive motor output speed A coefficient that matches the output speed of the drive motor. ; Based on the electric oil pump speed value , drive motor output speed ,coefficient Calculate the target rotational speed : If it is in gear, then the torque output by the drive motor during the gearing process is obtained. The coefficient that matches the output torque of the drive motor Overall vehicle speed The coefficient that matches the overall vehicle speed ; Based on the output torque of the drive motor ,coefficient Overall vehicle speed ,coefficient Calculate the target rotational speed : In the formula, Nmin is the minimum required speed of the electric oil pump.

6. The dual feed electric oil pump control device for a transmission according to claim 5, characterized by Simultaneously activate the electric oil pump input power fault detection: Acquiring a supply voltage of a power battery ; like , If the power supply voltage threshold of the power battery is reached, and the electric oil pump input power fails, the input power of the electric oil pump will be switched from the power battery to the backup battery, the drive motor will be shut down, the gearbox will be returned to neutral, and the speed of the electric oil pump will be gradually reduced until it is shut down. like If so, the electric oil pump input power supply is normal.

7. An electronic device, characterized in that, Including processor and storage media; The storage medium is used to store instructions; The processor is configured to operate according to the instructions to perform the steps of the method according to any one of claims 1-4.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that, When executed by a processor, the program implements the steps of the method according to any one of claims 1-4.

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