Oil pump control system and automobile

Abstract

The invention discloses an oil pump control system and an automobile, and relates to the technical field of control, the oil pump control system comprises a first controller, a pump body, a first motor, a second controller, a second motor and a clutch; the first motor is used for receiving a first driving control signal output by the first controller and driving the pump body to extract liquid; the second motor is used for receiving a second driving control signal output by the second controller and driving the pump body to extract liquid; the clutch is in transmission connection with the pump body and the second motor. When the first controller and / or the first motor breaks down, the clutch conducts a connection path between the second motor and the pump body, so that the second motor drives the pump body to extract liquid; and when the first controller and the first motor do not fail, the clutch disconnects a connection path between the second motor and the pump body, so that the first motor drives the pump body to extract liquid. The problem that an electric drive system is overheated and shut down due to the fact that the electric drive system lacks the necessary cooling and lubricating effect of lubricating oil is solved, and user experience is improved.

Description

Technical Field

[0001] The present invention relates to the field of control technology, and particularly to an oil pump control system and an automobile. Background Art

[0002] With the rapid development and wide application of oil-cooled electric drive systems, the electronic oil pump, as one of its key components, has also been widely used. The traditional structure of the electronic oil pump mainly consists of three parts: an oil pump controller, an oil pump motor, and a pump body. The rotational driving force of the pump body completely comes from the oil pump motor. Although this design performs well under normal working conditions, its performance and reliability face challenges in extreme ambient temperatures or when the system fails.

[0003] In the domestic market, the required working environment temperature range for a whole vehicle is from -40°C to 85°C. Especially in a low-temperature environment, the viscosity of the lubricating oil significantly increases, resulting in an increase in fluid resistance. At this time, due to power limitations, the electronic oil pump may not be able to start normally or can only pump out a small amount of oil, unable to meet the requirements of the electric drive system. In addition, if the oil pump controller or the oil pump motor of the electronic oil pump fails, the entire electronic oil pump will stop working, which will cause the electric drive system to overheat and shut down due to the lack of the necessary cooling and lubricating effect of the lubricating oil, seriously affecting the driving experience and may cause mechanical damage. Summary of the Invention

[0004] The main purpose of the present invention is to propose an oil pump control system and an automobile, aiming to improve the problem that the electric drive system overheats and shuts down due to the lack of the necessary cooling and lubricating effect of the lubricating oil, and enhance the user experience.

[0005] To achieve the above object, the present invention proposes an oil pump control system, and the oil pump control system includes:

[0006] A first controller;

[0007] A pump body for extracting liquid;

[0008] A first motor electrically connected to the first controller, the first motor being configured to receive a first drive control signal output by the first controller and drive the pump body to extract liquid;

[0009] A second controller;

[0010] A second motor electrically connected to the second controller, the second motor being configured to receive a second drive control signal output by the second controller and drive the pump body to extract liquid;

[0011] A clutch electrically connected to the first controller and respectively in transmission connection with the pump body and the second motor;

[0012] When the first controller and / or the first motor fails, the clutch connects the connection path between the second motor and the pump body, so that the second motor drives the pump body to extract liquid;

[0013] When neither the first controller nor the first motor fails, the clutch disconnects the connection path between the second motor and the pump body, so that the first motor drives the pump body to extract liquid.

[0014] In one embodiment, an elastic component is provided between the pump body and the clutch, and the pump body, the elastic component and the clutch are movably connected;

[0015] A solenoid valve, wherein a controlled end of the solenoid valve is connected to the first controller, a first end of the solenoid valve is connected to the pump body, and a second end of the solenoid valve is connected to the clutch;

[0016] The solenoid valve is used to close the liquid flow path between the pump body and the clutch when the first controller and / or the first motor fails, so that the clutch can conduct the connection path between the second motor and the pump body in the natural state of the elastic component;

[0017] And it is used to open the liquid flow path between the pump body and the clutch when neither the first controller nor the first motor fails, so that the clutch can disconnect the connection path between the second motor and the pump body under the elastic force of the elastic component.

[0018] In one embodiment, a first gear is provided at one end of the clutch, the clutch is movably connected to the first gear, a second gear is meshed on the first gear, and the second motor drives the second gear to rotate;

[0019] When the first controller and / or the first motor fails, the solenoid valve closes the liquid flow path between the pump body and the clutch, so that the clutch is in transmission connection with the first gear in the natural state of the elastic component, and the connection path between the second motor and the pump body through the second gear is connected;

[0020] When neither the first controller nor the first motor fails, the solenoid valve opens the liquid flow path between the pump body and the clutch, so that the clutch is disengaged from the first gear under the elastic force of the elastic component, thereby disconnecting the connection path between the second motor and the pump body via the second gear.

[0021] In one embodiment, the first motor comprises an oil pump motor, and the first controller comprises an oil pump controller;

[0022] And / or, the second motor includes a driving motor, and the second controller includes a driving motor controller.

[0023] In one embodiment, the first controller includes a first main controller and a first communication module, and the second controller includes a second main controller and a second communication module, wherein the first main controller and the second main controller are communicatively connected via the first communication module and the second communication module.

[0024] In one embodiment, the first main controller is configured to detect parameters of the first motor, and when determining that the first motor fails according to the parameters of the first motor, output a fault signal to the second communication module via the first communication module;

[0025] The second main controller is configured to receive the fault signal via the second communication module, and when determining that the first motor fails according to the fault signal, output the second drive control signal to the second motor so that the second motor drives the pump body.

[0026] In one embodiment, the first main controller sends a communication signal to the second communication module at a preset frequency via the first communication module so that the second main controller receives the communication signal;

[0027] The second main controller is configured to determine that the first main controller fails when the communication signal is not received within a preset time period, and output the second drive control signal to the second motor to control the second motor to stop driving the pump body.

[0028] In one embodiment, after the second main controller outputs the second drive control signal to the second motor, when the second main controller receives the communication signal again, the second main controller stops outputting the second control drive signal so that the first motor drives the pump body to extract liquid.

[0029] In one embodiment, the oil pump control system further includes:

[0030] A temperature detection module, connected to the first controller, configured to detect a temperature parameter of the first motor and output a corresponding temperature detection signal to the first controller;

[0031] The first controller is further configured to adjust a duty cycle of the second drive control signal when determining that the temperature of the first motor exceeds a preset temperature threshold according to the temperature detection signal, so as to reduce the rotation speed of the first motor.

[0032] The present invention further provides an automobile, including the oil pump control system described above.

[0033] The present invention proposes an oil pump control system, which includes a first controller, a pump body, a first motor, a second controller and a clutch, wherein the pump body is used to extract liquid; the first motor is electrically connected to the first controller, and the first motor is used to receive a first drive control signal output by the first controller and drive the pump body to extract liquid; the second motor is electrically connected to the second controller, and is used to receive a second drive control signal output by the second controller and drive the pump body to extract liquid; the clutch is electrically connected to the first controller and is respectively transmission-connected to the pump body and the second motor; when a fault occurs in the first controller and / or the first motor, the clutch connects the connection path between the second motor and the pump body so that the second motor drives the pump body to extract liquid; when neither the first controller nor the first motor fails, the clutch disconnects the connection path between the second motor and the pump body so that the first motor drives the pump body to extract liquid.

[0034] In actual applications, a redundant design of dual motors (first motor and second motor) and dual controllers (first controller and second controller) is adopted to ensure that the system can still operate normally when any component fails, thereby improving the fault tolerance and reliability of the system. In addition, when the first motor or the first controller fails, the clutch can quickly connect the connection path between the second motor and the pump body, and the second controller controls the second motor to drive the pump body to ensure the continuous supply of lubricating oil, thereby improving the problem of overheating and shutdown of the electric drive system due to lack of necessary cooling and lubrication of lubricating oil, thereby improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0036] Figure 1 A schematic diagram of a module of an embodiment of an oil pump control system of the present invention;

[0037] Figure 2 A schematic diagram of a module of another embodiment of the oil pump control system of the present invention;

[0038] Figure 3 A schematic diagram of a module of another embodiment of the oil pump control system of the present invention;

[0039] Figure 4 This is a module diagram of another embodiment of the oil pump control system of the present invention.

[0040] Description of Figure Numbers:

[0041] 10. First controller; 20. Pump body; 30. First motor; 40. Second controller; 50. Second motor; 60. Clutch; 70. Elastic component; 80. Solenoid valve; 90. First gear; 100. Second gear; 11. Oil pump controller; 31. Oil pump motor; 41. Drive motor controller; 51. Drive motor; 12. First main controller; 13. First communication module; 42. Second main controller; 43. Second communication module; 110. Temperature detection module.

[0042] The realization, functional features and advantages of the present invention will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0043] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0044] It should be noted that in this article, step codes such as S100 and S200 are used. The purpose is to more clearly and briefly express the corresponding content and do not constitute a substantial limitation in sequence. Those skilled in the art may execute S200 first and then S100 during specific implementation, etc., but these should all be within the protection scope of this application.

[0045] With the rapid development and wide application of oil-cooled electric drive systems, electronic oil pumps, as one of their key components, have also been widely used. The traditional structure of an electronic oil pump mainly consists of three parts: an oil pump controller 11, an oil pump motor 31, and a pump body 20. The rotational driving force of the pump body 20 completely comes from the oil pump motor 31. Although this design performs well under normal working conditions, its performance and reliability face challenges under extreme ambient temperatures or when the system fails.

[0046] It should be noted that in an oil-cooled electric drive system, the main task of the electric oil pump is to supply lubricating oil to the following key components: the drive motor 51, the gear transmission device, the bearings, etc. As the core power source of the electric drive system, the drive motor 51 generates a large amount of heat during operation. The lubricating oil flows through the inside of the drive motor 51 through a specific channel to help dissipate heat and reduce friction, ensuring that the drive motor 51 can operate efficiently within a safe working temperature range. The gear transmission device includes components such as the gears in the reducer. These components also generate heat and wear during the power transmission process. The lubricating oil can effectively reduce the friction coefficient of these parts, extend the service life, and take away a part of the heat. The bearings include the bearings inside the motor and the bearings in the gearbox, which are components that work under high load and are prone to generating heat and wear due to friction. The lubricating oil can effectively reduce the friction coefficient of these parts, extend the service life, and take away a part of the heat.

[0047] In the domestic market, the required working environment temperature range for the whole vehicle is -40°C to 85°C. Especially in a low-temperature environment, the viscosity of the lubricating oil increases significantly, resulting in an increase in fluid resistance. At this time, due to power limitations, the electric oil pump may not be able to start normally or can only pump out a small amount of oil, unable to meet the requirements of the electric drive system. In addition, if the oil pump controller 11 or the oil pump motor 31 of the electric oil pump fails, the entire electric oil pump will stop working, which will cause the electric drive system to overheat and shut down due to the lack of the necessary cooling and lubricating effect of the lubricating oil, seriously affecting the driving experience and may cause mechanical damage. In the oil-cooled electric drive system, the main task of the electric oil pump is to supply lubricating oil to the following key components:

[0048] For this reason, referring to Figure 1 , the present invention proposes an oil pump control system, and the oil pump control system includes:

[0049] A first controller 10;

[0050] A pump body 20 for pumping liquid;

[0051] A first motor 30, electrically connected to the first controller 10, and the first motor 30 is used to receive the first drive control signal output by the first controller 10 and drive the pump body 20 to pump liquid;

[0052] A second controller 40;

[0053] A second motor 50, electrically connected to the second controller 40, and the second motor 50 is used to receive the second drive control signal output by the second controller 40 and drive the pump body 20 to pump liquid;

[0054] A clutch 60, electrically connected to the first controller 10, and respectively transmission-connected to the pump body 20 and the second motor 50;

[0055] When a failure occurs in the first controller 10 and / or the first motor 30, the clutch 60 conducts the connection path between the second motor 50 and the pump body 20, so that the second motor 50 drives the pump body 20 to extract liquid.

[0056] When no failure occurs in the first controller 10 and the first motor 30, the clutch 60 disconnects the connection path between the second motor 50 and the pump body 20, so that the first motor 30 drives the pump body 20 to extract liquid.

[0057] In this embodiment, both the first motor 30 and the second motor 50 can be implemented by a brushless DC motor, a permanent magnet synchronous motor, a brushed DC motor, an AC asynchronous motor, etc. The first controller 10 and the second controller 40 can be implemented by a main controller, such as an MCU, a DSP (Digital Signal Process), an FPGA (Field Programmable Gate Array), a PLC, an SOC (System On Chip), etc. The pump body 20 can be implemented by a gear pump, a vane pump, a centrifugal pump, a diaphragm pump, etc. The type of the pump body 20 can be selected according to factors such as the viscosity, temperature, and corrosiveness of the liquid (oil). For example, high-viscosity oil is more suitable for using a gear pump or a screw pump, while corrosive oil may require a diaphragm pump. Different types of pump bodies 20 have different flow rate and pressure ranges, and the pump body 20 that can meet these parameters of the flow rate and pressure can be selected according to actual needs.

[0058] Specifically, under normal working conditions, the first controller 10 sends a first drive control signal to the first motor 30. After receiving the first drive control signal, the first motor 30 starts to operate and directly drives the pump body 20 to work through a mechanical connection. At this time, the second motor 50 does not participate in the work, and the entire system is responsible for driving the pump body 20 to extract lubricating oil by the first motor 30 to supply cooling and lubrication to each key component (such as the drive motor 51, the gearbox, etc.) of the electric drive system. If a failure occurs in the first controller 10 or the first motor 30 (such as overheating, short circuit, etc.), the second controller 40 sends a second drive control signal to the second motor 50. After receiving the second drive control signal, the second motor 50 starts to work and drives the pump body 20 to continue extracting lubricating oil through a mechanical transmission device (such as a gear or a belt), ensuring that even in the case of a failure of the first motor 30 or the first controller 10, the electric drive system can still obtain necessary cooling and lubrication, and avoiding the problem of overheating shutdown caused by lack of lubricating oil.

[0059] It should be noted that the first controller 10 and the second controller 40 can be communicatively connected. For example, data exchange can be carried out through the communication modules and corresponding communication protocols (such as CAN bus, RS-485, Ethernet, etc.) inside the first controller 10 and the second controller 40. For example, the first main controller 12 regularly sends status report signals to the second main controller 42 through the internal communication module. These status report signals can include key parameters such as the operating status, temperature, and current of the first motor 30, or the first controller 10 directly sends the result determined according to these key parameters as a status report signal to the second controller 40. That is, when the first controller 10 determines that the first motor 30 fails, it sends a status report signal indicating the failure of the first motor 30 to the second controller 40, so that the second controller 40 controls the second motor 50 to drive the pump head to work. At the same time, the clutch 60 is controlled by the first controller 10. When the first controller 10 is working properly, the clutch 60 is in the default state, disconnecting the connection path between the second motor 50 and the pump body 20. When the first controller 10 fails, the clutch 60 conducts the connection path between the second motor 50 and the pump body 20. In addition, when the first controller 10 fails, the first controller 10 and the second controller 40 cannot communicate normally. At this time, the second controller 40 directly controls the second motor 50 to drive the pump body 20 to continue pumping lubricating oil through a mechanical transmission device (such as a gear or a belt).

[0060] It can be understood that the oil pump control system can also be provided with a temperature detection module 110 for detecting the actual temperature of the lubricating oil, the ambient temperature, the motor temperature, etc., so that the first controller 10 can judge whether it is in a low-temperature environment through at least one of multiple temperature measurement values, ensuring that the oil pump control system can work normally in a low-temperature environment. For example, the lubricating oil temperature sensor can be installed at a position where it can directly contact the lubricating oil flow, such as the oil pump inlet or inside the fuel tank. The ambient temperature sensor should be placed in a relatively open position that can represent the ambient temperature. The temperature sensor sends the collected data to the first controller 10 or a dedicated monitoring unit. The first controller 10 makes a judgment according to the preset temperature threshold and takes corresponding measures, such as adjusting the motor speed, enabling a standby drive mechanism, etc. When the first controller 10 determines that it is in a low-temperature environment according to the temperature detection signal output by the temperature detection module 110, it means that the viscosity of the lubricating oil increases and the resistance is very large. At this time, the electric oil pump may not be able to start normally at low temperature due to power limitation or can only pump out a small amount of oil, which cannot meet the electric drive demand. Therefore, the second controller 40 directly controls the second motor 50 to drive the pump body 20 to continue pumping lubricating oil through a mechanical transmission device (such as a gear or a belt). Or, the system is equipped with a heating device that can appropriately heat the lubricating oil to prevent the viscosity from being too high.

[0061] In actual applications, a redundant design of dual motors (first motor 30 and second motor 50) and dual controllers (first controller 10 and second controller 40) is adopted to ensure that the system can still operate normally when any component fails, thereby improving the fault tolerance and reliability of the system. In addition, when the first motor 30 or the first controller 10 fails, the clutch 60 can quickly conduct the connection path between the second motor 50 and the pump body 20, and the second controller 40 controls the second motor 50 to drive the pump body 20 to work, ensuring the continuous supply of lubricating oil, improving the problem of overheating and shutdown of the electric drive system due to lack of necessary cooling and lubrication of lubricating oil, thereby improving the user experience.

[0062] In one embodiment, an elastic component 70 is provided between the pump body 20 and the clutch 60, and the pump body 20, the elastic component 70 and the clutch 60 are movably connected;

[0063] A solenoid valve 80, wherein a controlled end of the solenoid valve 80 is connected to the first controller 10, a first end of the solenoid valve 80 is connected to the pump body 20, and a second end of the solenoid valve 80 is connected to the clutch 60;

[0064] The solenoid valve 80 is used to close the liquid flow path between the pump body 20 and the clutch 60 when the first controller 10 and / or the first motor 30 fails, so that the clutch 60 conducts the connection path between the second motor 50 and the pump body 20 in the natural state of the elastic component 70;

[0065] And it is used to open the liquid flow path between the pump body 20 and the clutch 60 when neither the first controller 10 nor the first motor 30 fails, so that the clutch 60 can disconnect the connection path between the second motor 50 and the pump body 20 under the elastic force of the elastic component 70.

[0066] A first gear 90 is provided at one end of the clutch 60, and the clutch 60 is movably connected to the first gear 90. A second gear 100 is meshed with the first gear 90, and the second motor 50 drives the second gear 100 to rotate;

[0067] When the first controller 10 and / or the first motor 30 fails, the solenoid valve 80 closes the liquid flow path between the pump body 20 and the clutch 60, so that the clutch 60 is in transmission connection with the first gear 90 in the natural state of the elastic component 70, and the connection path between the second motor 50 and the pump body 20 via the second gear 100 is opened;

[0068] When neither the first controller 10 nor the first motor 30 fails, the solenoid valve 80 opens the liquid flow path between the pump body 20 and the clutch 60, so that the clutch 60 disengages from the first gear 90 under the elastic force of the elastic component 70, and the connection path between the second motor 50 and the pump body 20 via the second gear 100 is disconnected.

[0069] In this embodiment, the clutch 60 cooperates with the elastic component 70 and, under the control of the first controller 10 and the solenoid valve 80, realizes the switching between the first motor 30 and the second motor 50. The elastic component 70 can be implemented by an elastic member such as a spring that has elastic ability and self-restoring ability. It is responsible for providing elastic force so that the clutch 60 can maintain the state of being engaged with the first gear 90 when the solenoid valve 80 is closed, and push the clutch 60 to disengage from the first gear 90 when the solenoid valve 80 is opened. The solenoid valve 80 is controlled by the first controller 10 and is used to open or close the liquid flow path between the pump body 20 and the clutch 60. When the solenoid valve 80 is opened, the liquid pressure overcomes the elastic force of the elastic component 70, causing the clutch 60 to disengage from the first gear 90; when the solenoid valve 80 is closed, the elastic component 70 returns to its natural state, causing the clutch 60 to engage with the first gear 90. When the clutch 60 is engaged with the first gear 90, since the second gear 100 meshes with the first gear 90, the power of the second motor 50 is transmitted to the pump body 20 through the rotation of the second gear 100 and the first gear 90.

[0070] Specifically, the first controller 10 controls the operation of the first motor 30. The first controller 10 issues a first drive control signal according to the system requirements to drive the first motor 30 to operate. The first motor 30 directly drives the pump body 20 to work through mechanical connection, extracts lubricating oil and supplies it to the electric drive system. Under normal operating conditions, the first controller 10 controls the solenoid valve 80 to open, and part of the pressurized oil flows through the solenoid valve 80 to the clutch 60. These pressurized oil overcome the elastic force of the spring, enabling the clutch 60 to disengage from the gear. At this time, due to the pressure of the oil, the spring is compressed and in a stressed state. The spring attempts to push the clutch 60 towards the gear, but since the pressure of the oil is greater, this "pulling" action of the spring is temporarily offset. The clutch 60 is separated from the first gear 90, and the second motor 50 does not participate in the work. Although the spring is in a compressed state, due to the continuous presence of the oil pressure, the spring cannot push the clutch 60 back onto the first gear 90. Therefore, the connection path between the second motor 50 and the pump body 20 is in a disconnected state. The pump body 20 is driven by the first motor 30 to supply oil to the electric drive system, which is the normal working mode of the electronic oil pump. When the first controller 10 detects a fault in itself or the first motor 30 (such as overheating, short circuit, etc.), it closes the solenoid valve 80. After the solenoid valve 80 is closed, the liquid flow path between the pump body 20 and the clutch 60 is cut off. The elastic component 70 returns to its natural state and pushes the clutch 60 to engage with the first gear 90. At this time, the clutch 60 establishes a transmission connection with the second motor 50 through the meshing relationship between the first gear 90 and the second gear 100. The second motor 50 drives the pump body 20 to work: after receiving the fault signal from the first controller 10, the second controller 40 immediately issues a second drive control signal to start the second motor 50. In this way, the second motor 50 drives the pump body 20 to continue working through the second gear 100, the first gear 90 and the clutch 60, ensuring the continuous supply of lubricating oil.

[0071] Optionally, referring to Figure 2 , the first motor 30 includes an oil pump motor 31, and the first controller 10 includes an oil pump controller 11;

[0072] and / or, the second motor 50 includes a drive motor 51, and the second controller 40 includes a drive motor controller 41.

[0073] In this embodiment, by introducing the drive motor 51 and its controller as a backup drive source, even when the oil pump motor 31 or the oil pump controller 11 fails or in a low-temperature environment, the oil pump control system can still operate normally. That is, once a fault is detected, the drive motor controller 41 can quickly take over the control right and start the drive motor 51 to drive the pump body 20 to work, effectively avoiding the shutdown problem caused by the oil pump failure and ensuring the continuity of the system. And in a low-temperature environment, the viscosity of the lubricating oil increases, and the oil pump motor 31 may not be able to start normally due to insufficient power. At this time, the drive motor 51 usually has a larger starting torque and can more effectively overcome the resistance of the lubricating oil, ensuring that the system can also operate normally under extreme conditions. In addition, by using the existing drive motor 51 and its controller, the cost and complexity of purchasing and installing the second motor 50 and the second controller 40 additionally are avoided. The number of components in the system is reduced, the overall complexity of the system is lowered, and the maintenance and management are made more convenient.

[0074] Through the above settings, by using the drive motor 51 and its controller as a backup drive source, the cost and complexity of purchasing and installing the second motor 50 and the controller additionally are avoided. Whether the oil pump motor 31 fails, the oil pump controller 11 fails or other abnormal situations occur, the oil pump control system can quickly switch to the backup drive mode to ensure that the electric drive system has enough lubricating oil to ensure its normal operation and avoid the overheating shutdown problem caused by the lack of lubricating oil. In this way, the reliability of the oil pump control system is improved.

[0075] In another embodiment, referring to Figure 3 , the first controller 10 includes a first main controller 12 and a first communication module 13, and the second controller 40 includes a second main controller 42 and a second communication module 43. Among them, the first main controller 12 and the second main controller 42 are communicatively connected via the first communication module 13 and the second communication module 43.

[0076] The first main controller 12 is configured to detect the parameters of the first motor 30, and when it determines that the first motor 30 fails according to the parameters of the first motor 30, output a fault signal to the second communication module 43 via the first communication module 13;

[0077] The second main controller 42 is configured to receive the fault signal via the second communication module 43, and when it determines that the first motor 30 fails according to the fault signal, output the second drive control signal to the second motor 50 to make the second motor 50 drive the pump body 20.

[0078] In this embodiment, both the first main controller 12 and the second main controller 42 can be implemented by using the above-mentioned main controller. Both the first communication module 13 and the second communication module 43 can be implemented by using a wireless communication module, such as a WIFI module, a 4G / 5G module, a Bluetooth module, etc., or by using a wired communication module, such as a CAN communication module, a LIN communication module, an RS485 communication module.

[0079] In this embodiment, various types of sensors can be installed on the first motor 30. For example: a temperature sensor (such as a thermistor) is used to monitor the temperature of the first motor 30. A current sensor is used to monitor the motor current. A speed sensor is used to monitor the motor speed. These sensors send the collected data to the first main controller 12 in real time. For example, the temperature sensor sends the current motor temperature once per second. The current sensor continuously monitors the working current of the motor, and the first controller 10 triggers an alarm when it determines that the current of the first motor 30 exceeds the preset current threshold. The speed sensor monitors the speed of the first motor 30 to ensure that it remains within the normal range. It can be understood that a series of fault detection thresholds are preset in the first main controller 12. For example, if the temperature threshold is 80 °C, it is considered that the motor is overheated. If the motor current exceeds 150% of the rated current, it is considered that the motor is overloaded. If the motor speed is lower than the set minimum speed, it is considered that the motor has stalled. The first main controller 12 determines whether a fault occurs according to the sensor data received in real time. Once the first main controller 12 detects any of the above fault conditions, it generates a motor fault signal (one type of fault signal) containing detailed fault information, and sends the generated motor fault signal to the second communication module 43 through the first communication module 13. Assume that the system uses the CAN bus as the communication protocol: the first communication module 13 packs the fault signal into a data frame conforming to the CAN bus format and sends it to the CAN bus. After receiving the data frame from the CAN bus, the second communication module 43 decodes it and passes it to the second main controller 42.

[0080] After receiving the fault signal, the second main controller 42 first verifies the signal to confirm the authenticity of the fault. For example, check the timestamp in the signal to ensure that it is not old data. Verify whether the fault type and specific value are reasonable. Once the fault is confirmed, the second main controller 42 immediately takes action, outputs a second drive control signal to the second motor 50, and starts the standby drive mechanism. At the same time, the first controller 10 controls the solenoid valve 80 to close and does not drive the motor 51, so that the clutch 60 is engaged with the gear under the action of the spring force to establish a transmission connection. When receiving the fault signal, the second motor 50 outputs a second drive control signal to drive the pump body 20 to continue working through the gear transmission device, ensuring the continuous supply of lubricating oil and avoiding the problem of overheating shutdown caused by lack of lubricating oil.

[0081] Through the above process, the first controller 10 can detect in real time whether the first motor 30 fails and notify the second controller 40 in a timely manner, enabling the entire oil pump control system to continue to operate normally in the event of a failure of the first motor 30, thereby improving the reliability and safety of the system.

[0082] In one embodiment, the first main controller 12 sends a communication signal to the second communication module 43 at a preset frequency via the first communication module 13, so that the second main controller 42 can receive the communication signal.

[0083] The second main controller 42 is configured to determine that the first main controller 12 has failed when the communication signal is not received within a preset time period, and output the second drive control signal to the second motor 50 to control the second motor 50 to stop driving the pump body 20.

[0084] After the second main controller 42 outputs the second drive control signal to the second motor 50, when the second main controller 42 receives the communication signal again, the second main controller 42 stops outputting the second control drive signal, so that the first motor 30 drives the pump body 20 to extract liquid.

[0085] In this embodiment, when the first main controller 12 fails, assume that for some reason (such as hardware failure, software crash, etc.), the first main controller 12 cannot continue to send communication signals. This will cause the first communication module 13 to stop sending signals to the second communication module 43. The second main controller 42 detects the loss of the communication signal. For example, the second main controller 42 sets a preset time period (such as 5 seconds). If no communication signal is received within this period, it is considered that the first main controller 12 has failed. Once the loss of the communication signal is detected, the second main controller 42 immediately takes action, starts the second motor 50, and drives the pump body 20 to continue working through the gear transmission device to ensure the continuous supply of lubricating oil. At this time, since the solenoid valve 80 is in the default closed state, when the first controller 10 fails, it cannot output a valid control signal to the solenoid valve 80 to control the solenoid valve 80 to open. Therefore, the solenoid valve 80 does not receive the control signal and returns to the default state, cutting off the liquid flow path between the pump body 20 and the clutch 60. Under the action of the elastic component 70, the clutch 60 is combined with the first gear 90 to establish a transmission connection. In this way, after the second main controller 42 generates a PWM signal (the second drive control signal), it switches to the first main controller 12 and the second motor 50 to drive the pump body 20 to work.

[0086] In addition, assume that after a period of time, the first main controller 12 resumes normal operation and starts sending communication signals again. The second main controller 42 receives the communication signals sent by the first communication module 13 again and confirms that the first main controller 12 has resumed normal operation. The second main controller 42 stops outputting the second drive control signal to stop the second motor 50. At the same time, the first main controller 12 issues an instruction to open the solenoid valve 80 to restore the liquid flow path between the pump body 20 and the clutch 60. The pressurized oil flows through the solenoid valve 80 to the clutch 60, overcoming the spring force to disengage the clutch 60 from the first gear 90 and disconnect the transmission connection. The first motor 30 takes over the operation of the pump body 20 again: the first main controller 12 issues the first drive control signal again to start the first motor 30, so that the first motor 30 directly drives the pump body 20 through mechanical connection to resume normal operation mode.

[0087] It should be noted that assume that due to insufficient battery power or other reasons, the vehicle voltage drops to a relatively low level (for example, below 9V), which will affect the normal operation of the first motor 30. The voltage sensor built in the first main controller 12 detects the too low voltage and triggers the corresponding protection mechanism. When detecting the too low voltage, the first main controller 12 stops sending the drive control signal to the first motor 30 and sends a fault signal to the second communication module 43 through the first communication module 13. After receiving the fault signal, the second main controller 42 immediately starts the second motor 50 as a backup drive source. Although the first motor 30 stops working, the first main controller 12 still maintains communication with the second main controller 42 through the first communication module 13 to ensure real-time update of the system status. When the vehicle voltage returns to the normal level (for example, back above 12V), the first main controller 12 starts sending communication signals again and is ready to take over the control. After receiving the communication signals from the first main controller 12, the second main controller 42 confirms that the voltage has returned to normal and stops outputting the second drive control signal to stop the second motor 50. Since the oil pump controller 11 and the drive motor controller 41 often have independent power paths. For example, the oil pump controller 11 can directly obtain power from the vehicle-mounted battery, while the drive motor controller 41 is powered by a more stable power module (such as a DC-DC converter). This design can ensure that key components (such as the drive motor controller 41) can still obtain a stable working voltage when the battery voltage fluctuates. Thus, in the present invention, when the power supply voltage of the oil pump controller 11 is too low, the drive motor controller 41 controls the drive motor 51 to drive the pump body 20 to extract oil through transmission devices such as gears to ensure that the lubricating oil supply is not affected.

[0088] In addition, when the power connection of the first main controller 12 becomes loose due to vibrations during vehicle driving, resulting in an instantaneous interruption of the supply voltage. The first main controller 12 loses power and is unable to continue sending communication signals. If the second main controller 42 does not receive any communication signals within a preset time, it is considered that the first main controller 12 has failed or the power supply has been interrupted. At this time, the drive source of the oil pump control system is switched to the second controller 40 and the second motor 50 to ensure the continuous supply of lubricating oil. When the vibration stops or the power connection is restored after repeated vibrations, the power supply connection of the first main controller 12 is restored and the power supply returns to normal. The first main controller 12 resumes sending communication signals and prepares to take over control. After receiving the communication signal from the first main controller 12, the second main controller 42 confirms that the power supply has returned to normal and stops outputting the second drive control signal to stop the second motor 50 from working.

[0089] In this embodiment, the design of the oil pump motor 31 usually takes into account the operating characteristics of the oil pump, such as rotational speed, torque requirements, etc., to ensure the best load matching. Although the drive motor 51 can also complete the task, long-term use may cause unnecessary wear and shorten its service life. Therefore, when the oil pump controller 11 is working properly, by switching back to the dedicated oil pump motor 31, there is no need for the drive motor 51 to long-term undertake tasks that are not its main responsibilities, thereby reducing unnecessary mechanical wear and extending the service life of the overall system.

[0090] Through the above settings, in the case of a failure of the first main controller 12, too low vehicle voltage, or power supply interruption due to factors such as vibrations, the loss of communication signals is used to trigger the second main controller 42 to drive the second motor 50, and it is also possible to switch back to the first main controller 12 and the first motor 30. In this way, the problem of overheating shutdown of the electric drive system due to the lack of the necessary cooling and lubrication effect of the lubricating oil is improved, thereby enhancing the user experience.

[0091] In one embodiment, referring to Figure 4 , the oil pump control system further includes:

[0092] A temperature detection module 110, connected to the first controller 10, the temperature detection module 110 is used to detect the temperature parameter of the first motor 30 and output a corresponding temperature detection signal to the first controller 10;

[0093] The first controller 10 is further configured to adjust the duty ratio of the second drive control signal to reduce the rotational speed of the first motor 30 when it determines that the temperature of the first motor 30 exceeds a preset temperature threshold according to the temperature detection signal.

[0094] In this embodiment, the temperature detection module 110 can be implemented by using a thermocouple, a thermistor, an infrared temperature sensor, etc.

[0095] Specifically, the temperature detection module 110 monitors the temperature of the first motor 30 in real time and outputs a corresponding temperature detection signal to the first controller 10. Once the temperature of the first motor 30 exceeds the preset temperature threshold, the first controller 10 will reduce the duty cycle of the output second drive control signal, lower the effective voltage of the first motor 30, and thus reduce the rotational speed of the motor. In this way, by reducing the working load of the motor, the heat generation caused by factors such as friction and excessive current is further reduced. If after a period of time, the temperature of the first motor 30 still does not drop to the safe range, or the temperature shows a continuous upward trend, it indicates that the current speed reduction measures are insufficient to solve the problem. At this time, the first controller 10 needs to report to the second controller 40 through the internal communication module and enable the standby drive mechanism. For example, the first controller 10 sends a motor fault signal to the second controller 40 through the communication module, notifying the second controller 40 that the first motor 30 has an overheating problem. The fault signal usually contains detailed diagnostic information, such as the current temperature, the attempted cooling measures and their effects, etc. After receiving the motor fault signal, the second controller 40 confirms that the first motor 30 indeed has an overheating risk or fault. At the same time, the first controller 10 activates the clutch 60 to conduct the connection path between the second motor 50 and the pump body 20. The second controller 40 outputs a second drive control signal to the second motor 50, starts the second motor 50 and drives the pump body 20 to continue pumping lubricating oil, ensuring that even if the first motor 30 fails or overheats, the entire oil pump control system can still operate normally, providing the necessary cooling and lubrication functions, and preventing the electric drive system from overheating and shutting down due to lack of lubricating oil.

[0096] By monitoring the temperature of the first motor 30 in real time through the temperature detection module 110 and taking measures to reduce the motor speed or enable the standby drive mechanism when the preset temperature threshold is exceeded, the motor is prevented from being damaged due to overheating, thus ensuring the safe operation of the system.

[0097] The present invention also provides an automobile, including the above-mentioned oil pump control system.

[0098] It should be noted that since the automobile of the present invention is based on the above-mentioned oil pump control system, therefore, the embodiments of the automobile of the present invention include all the technical solutions of all the embodiments of the above-mentioned oil pump control system, and the achieved technical effects are also exactly the same, which will not be elaborated here.

[0099] The above are only optional embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made by using the description and drawings of the present invention under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. An oil pump control system, characterized in that: The oil pump control system comprises: a first controller; A pump body, used for pumping liquid; A first motor is electrically connected to the first controller, and the first motor is used to receive a first driving control signal output by the first controller and drive the pump body to extract liquid; A second controller; a second motor, electrically connected to the second controller, and configured to receive a second driving control signal output by the second controller and drive the pump body to extract liquid; A clutch, electrically connected to the first controller, and respectively transmission-connected to the pump body and the second motor; When the first controller and / or the first motor fails, the clutch connects the connection path between the second motor and the pump body, so that the second motor drives the pump body to extract liquid; When neither the first controller nor the first motor fails, the clutch disconnects the connection path between the second motor and the pump body, so that the first motor drives the pump body to extract liquid.

2. The oil pump control system according to claim 1, characterized in that: An elastic component is provided between the pump body and the clutch, and the pump body, the elastic component and the clutch are movably connected; A solenoid valve, wherein a controlled end of the solenoid valve is connected to the first controller, a first end of the solenoid valve is connected to the pump body, and a second end of the solenoid valve is connected to the clutch; The solenoid valve is used to close the liquid flow path between the pump body and the clutch when the first controller and / or the first motor fails, so that the clutch can conduct the connection path between the second motor and the pump body in the natural state of the elastic component; And it is used to open the liquid flow path between the pump body and the clutch when neither the first controller nor the first motor fails, so that the clutch can disconnect the connection path between the second motor and the pump body under the elastic force of the elastic component.

3. The oil pump control system according to claim 2, characterized in that: A first gear is provided at one end of the clutch, the clutch is movably connected to the first gear, a second gear is meshed on the first gear, and the second motor drives the second gear to rotate; When the first controller and / or the first motor fails, the solenoid valve closes the liquid flow path between the pump body and the clutch, so that the clutch is in transmission connection with the first gear in the natural state of the elastic component, and the connection path between the second motor and the pump body through the second gear is connected; When neither the first controller nor the first motor fails, the solenoid valve opens the liquid flow path between the pump body and the clutch, so that the clutch is disengaged from the first gear under the elastic force of the elastic component, thereby disconnecting the connection path between the second motor and the pump body via the second gear.

4. The oil pump control system according to claim 1, characterized in that: The first motor comprises an oil pump motor, and the first controller comprises an oil pump controller; And / or, the second motor includes a drive motor, and the second controller includes a drive motor controller.

5. The oil pump control system according to claim 1, characterized in that: The first controller includes a first main controller and a first communication module, and the second controller includes a second main controller and a second communication module, wherein the first main controller and the second main controller are communicatively connected via the first communication module and the second communication module.

6. The oil pump control system according to claim 5, characterized in that: The first main controller is used to detect the parameters of the first motor, and when determining that the first motor fails according to the parameters of the first motor, output a fault signal to the second communication module via the first communication module; The second main controller is used for receiving the fault signal via the second communication module, and when determining that the first motor is faulty according to the fault signal, outputting the second drive control signal to the second motor so that the second motor drives the pump body.

7. The oil pump control system according to claim 5, characterized in that: The first main controller sends a communication signal to the second communication module at a preset frequency via the first communication module, so that the second main controller receives the communication signal; The second main controller is used to determine that the first main controller has failed when the communication signal is not received within a preset time period, and output the second drive control signal to the second motor to control the second motor to stop driving the pump body.

8. The oil pump control system according to claim 7, characterized in that: After the second main controller outputs the second drive control signal to the second motor, when the second main controller receives the communication signal again, the second main controller stops outputting the second control drive signal to enable the first motor to drive the pump body to extract liquid.

9. The oil pump control system according to any one of claims 1 to 8, characterized in that: The oil pump control system further includes: A temperature detection module connected to the first controller, the temperature detection module is used to detect the temperature parameter of the first motor and output a corresponding temperature detection signal to the first controller; The first controller is further configured to adjust the duty cycle of the second drive control signal to reduce the rotation speed of the first motor when it is determined according to the temperature detection signal that the temperature of the first motor exceeds a preset temperature threshold.

10. An automobile, characterized in that: Comprising the oil pump control system according to any one of claims 1 to 9.

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