An auxiliary lubrication system and control method

Abstract

The embodiment of the application provides an auxiliary lubrication system and a control method, wherein the auxiliary lubrication system comprises a lubrication system, a heat preservation oil tank system and a lubricating oil conveying control element; the heat preservation oil tank system is provided with a heating device; the lubricating oil conveying control element comprises a first oil pump, a first electromagnetic valve, a second electromagnetic valve and a third electromagnetic valve; the heat preservation oil tank system is arranged above a bearing component of an electric drive of a vehicle, a first opening is arranged below the heat preservation oil tank system, and the first opening is provided with the first electromagnetic valve; the lubrication system, the bearing component of the electric drive and the heat preservation oil tank system are connected through a first oil path, and the first oil path is provided with the first oil pump and the second electromagnetic valve; the lubrication system and a motor of the electric drive are connected through a third oil path, and the third oil path is provided with the first oil pump and the third electromagnetic valve. The auxiliary lubrication system and the control method can ensure that the lubricating oil is at the best working temperature and is conveyed to each component of the vehicle in time.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of automobile lubrication technology, in particular to an auxiliary lubrication system, a control method and device, an electronic device and a computer readable storage medium. BACKGROUND

[0002] The three-in-one electric drive assembly is an important power and transmission component of a new energy vehicle, including a drive motor, a reducer and an inverter. The drive motor is used to provide power for the vehicle, and the reducer is used to transmit power of the drive motor to the wheels.

[0003] The main components of the three-in-one electric drive assembly include a shell, a drive motor stator and rotor, two-stage reducer gears and bearings, etc. The shell wraps the drive motor stator and rotor, two-stage reducer gears and bearings, etc. inside and fills lubricating oil for cooling and lubrication.

[0004] To improve the driving range of the vehicle, the system efficiency of the three-in-one electric drive assembly needs to be improved as much as possible. Common measures to improve system efficiency include using lubricating oil to cool the drive motor and using active lubrication for the reducer gears and bearings. The former improves the cooling efficiency of the motor stator and rotor, and the latter reduces the oil stirring loss of the gears.

[0005] Engineering development practice and lubricating oil characteristics show that low temperature environment has a great impact on the efficiency of the electric drive system. In a low temperature state, the viscosity of the lubricating oil increases and the flowability becomes poor. The electric oil pump cannot timely deliver the lubricating oil to the specified position. High viscosity lubricating oil also causes the load of the electric oil pump to increase, accompanied by gear oil stirring loss, which reduces the efficiency of the entire power transmission system.

[0006] The existing lubrication system is not intelligent enough and cannot timely deliver lubricating oil to the specified position of the electric drive in a low temperature environment. At the same time, it cannot effectively control the temperature of the lubricating oil. SUMMARY

[0007] The purpose of the embodiments of the present application is to provide an auxiliary lubrication system, a control method and device, an electronic device and a computer readable storage medium, to solve at least one of the above technical problems.

[0008] In a first aspect, the embodiments of the present application provide an auxiliary lubrication system, comprising: a lubrication system, a heat preservation oil tank system;

[0009] The lubrication system and the heat preservation oil tank system are provided with a lubricating oil delivery control element;

[0010] The heat preservation oil tank system is provided with a heating device;

[0011] The lubricating oil delivery control element comprises a first oil pump, a first electromagnetic valve, a second electromagnetic valve and a third electromagnetic valve;

[0012] The heat preservation oil tank system is arranged above the bearing component of the electric drive of the vehicle, a first opening is arranged below the heat preservation oil tank system, and the first opening is provided with the first electromagnetic valve;

[0013] The lubricating system and the bearing component of the electric drive are connected through a first oil path;

[0014] The lubricating system and the heat preservation oil tank system are connected through a second oil path;

[0015] The first oil path is provided with the first oil pump and the second electromagnetic valve;

[0016] When the first channel of the second electromagnetic valve is opened, the first oil path is opened;

[0017] When the second channel of the second electromagnetic valve is opened, the second oil path is opened;

[0018] The lubricating system and the motor of the electric drive are connected through a third oil path, and the third oil path is provided with the first oil pump and the third electromagnetic valve.

[0019] In the implementation process, the heat preservation oil tank system is provided with a heating device, which can heat the lubricating oil in the heat preservation oil tank system, ensure that the lubricating oil is at the best working temperature, improve the flow performance of the lubricating oil, and reduce the burden of the oil pump of the vehicle. The heat preservation oil tank system is arranged above the bearing component of the electric drive, and a first opening is arranged below the heat preservation oil tank system. The first opening is provided with a first electromagnetic valve. Under the action of gravity, when the first electromagnetic valve is opened, the lubricating oil in the heat preservation oil tank can quickly enter the electric drive to lubricate the bearings in the electric drive, improving the timeliness of lubrication.

[0020] In some embodiments, the lubricating oil delivery control element includes a drain valve;

[0021] The bottom of the heat preservation oil tank is provided with a second opening;

[0022] The second opening is provided with the drain valve;

[0023] The lubricating system is arranged below the electric drive, and the lubricating system is configured with a first oil sump for receiving the lubricating oil flowing out of the second opening of the heat preservation oil tank system.

[0024] In some embodiments, the auxiliary lubricating system further includes a liquid supplementing system;

[0025] The liquid supplementing system includes the lubricating oil delivery control element;

[0026] The lubricating oil delivery control element further includes a second oil pump;

[0027] The replenishment system and the insulated oil tank system are connected through a fourth oil circuit, and the second oil pump is installed on the fourth oil circuit.

[0028] In the above implementation process, based on the second oil pump, when the lubricating oil in the vehicle's insulated oil tank system is insufficient, the compensation system can be made to deliver a solenoid valve to the insulated oil tank system through the second oil pump.

[0029] Secondly, this application provides a control method for an auxiliary lubrication system, applied to the auxiliary lubrication system described in any one of the first aspects, the method comprising:

[0030] Acquire the vehicle's operating status, oil level, and oil temperature in the insulated oil tank;

[0031] The operating state of the lubricating oil delivery control element is controlled according to one or more of the operating state, the oil level, and the oil temperature.

[0032] In the above implementation process, the working state of the lubricating oil delivery control element is controlled according to one or more of the working state, the oil level and the oil temperature, so that the lubricating oil can be at the optimal working temperature and delivered to different parts of the vehicle in a timely manner.

[0033] In some embodiments, controlling the operating state of the lubricating oil delivery control element based on one or more of the operating state, the oil level, and the oil temperature includes:

[0034] When the vehicle enters non-operating mode, the second channel of the second solenoid valve is opened, the third solenoid valve is closed, and the first oil pump is turned on.

[0035] When the oil level in the insulation oil tank system reaches the shutdown oil level, the second solenoid valve is closed, the third solenoid valve is opened, and the first oil pump is shut down.

[0036] In some embodiments, controlling the operating state of the lubricating oil delivery control element based on one or more of the operating state, the oil level, and the oil temperature further includes:

[0037] When the vehicle is in non-operating mode, if the oil temperature of the insulated oil tank system is lower than the first oil temperature, the heating device is turned on until the oil temperature of the insulated oil tank system is heated to the preset temperature.

[0038] In some embodiments, after activating the heating device when the oil temperature of the insulation oil tank system is lower than the insulation oil temperature, the method further includes:

[0039] The system detects the downtime and shuts down the heating device when the downtime exceeds a preset duration.

[0040] In the above implementation process, the downtime is detected. When the downtime exceeds the preset time, the heating device is turned off to avoid power failure.

[0041] In some embodiments, controlling the operating state of the lubricating oil delivery control element based on one or more of the operating state, the oil level, and the oil temperature includes:

[0042] When the vehicle enters working mode, the control drain valve opens until the liquid level in the insulated oil tank system reaches the start-up oil level.

[0043] In some embodiments, when the vehicle is in operating mode and the electric drive motor speed is greater than 0, the first oil pump is opened, the first channel of the second solenoid valve is opened, and the third solenoid valve is opened.

[0044] In some embodiments, controlling the operating state of the lubricating oil delivery control element based on one or more of the operating state, the oil level, and the oil temperature further includes:

[0045] When the vehicle is in working mode and the oil temperature of the lubrication system is lower than the second oil temperature, the first channel of the second solenoid valve is opened, and the first oil pump is turned on.

[0046] When the vehicle is in working mode and the oil temperature of the lubrication system is greater than the second oil temperature, the second solenoid valve is closed, the first solenoid valve and the third solenoid valve are opened, and the first oil pump is turned on.

[0047] In some embodiments, controlling the operating state of the lubricating oil delivery control element based on one or more of the operating state, the oil level, and the oil temperature includes:

[0048] When the vehicle is in working mode, if the oil level in the insulated oil tank system is lower than the strong cooling oil level, the second oil pump is activated.

[0049] In some embodiments, before obtaining the vehicle's operating status, the oil level and temperature in the insulated oil tank, the first oil pump and the second oil pump of the auxiliary lubrication system are in a closed state, the first solenoid valve and the second solenoid valve of the auxiliary lubrication system are in a closed state, and the third solenoid valve of the auxiliary lubrication system is in an open state.

[0050] Thirdly, this application provides a control device for an auxiliary lubrication system, comprising:

[0051] The parameter acquisition module is used to acquire the vehicle's operating status, the oil level and temperature in the insulated oil tank;

[0052] The control module is used to control the operating state of the lubricating oil delivery control element according to one or more of the operating state, the oil level, and the oil temperature.

[0053] Fourthly, this application provides an electronic device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the method as described in any of the first aspects.

[0054] Fifthly, this application provides a computer program product that, when run on a computer, causes the computer to perform the method described in any of the first aspects.

[0055] In a sixth aspect, this application provides a computer-readable storage medium storing instructions that, when executed on a computer, cause the computer to perform the method as described in any of the first aspects.

[0056] Other features and advantages disclosed in this application will be set forth in the following description, or some features and advantages may be inferred from the description or determined without doubt, or may be learned by practicing the above-described technology disclosed in this application.

[0057] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0058] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0059] Figure 1 This is a schematic diagram of the structure of the lubrication system provided in the embodiments of this application;

[0060] Figure 2 A schematic flowchart illustrating the control method of the lubrication system provided in an embodiment of this application;

[0061] Figure 3 Another schematic flowchart of the control method for the lubrication system provided in the embodiments of this application;

[0062] Figure 4 This is a schematic diagram of the structure of the control device for the lubrication system provided in the embodiments of this application;

[0063] Figure 5This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0064] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0065] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this application, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0066] This application provides an auxiliary lubrication system, including: a lubrication system and an insulated oil tank system; the lubrication system and the insulated oil tank system are equipped with a lubricating oil delivery control element; the insulated oil tank system is equipped with a heating device; the lubricating oil delivery control element includes: a first oil pump, a first solenoid valve, a second solenoid valve, and a third solenoid valve; the insulated oil tank system is disposed above the bearing component of the electric drive of the vehicle, and a first opening is provided below the insulated oil tank system, the first opening being equipped with the first solenoid valve; the lubrication system and the bearing component of the electric drive are connected through a first oil circuit; the lubrication system and the insulated oil tank system are connected through a second oil circuit; the first oil circuit is equipped with the first oil pump and the second solenoid valve; when the first channel of the second solenoid valve is opened, the first oil circuit is opened; when the second channel of the second solenoid valve is opened, the second oil circuit is opened; the lubrication system and the motor of the electric drive are connected through a third oil circuit, the third oil circuit being equipped with the first oil pump and the third solenoid valve.

[0067] In the above implementation process, the insulated oil tank system is equipped with a heating device to heat the lubricating oil within the system, ensuring it operates at its optimal temperature, improving its flow performance, and reducing the burden on the vehicle's oil pump. The insulated oil tank system is positioned above the bearing components of the electric drive unit, and a first opening is located at the bottom of the system. A first solenoid valve is installed in this opening. Under the influence of gravity, when the first solenoid valve opens, the lubricating oil in the insulated oil tank can quickly enter the electric drive unit to lubricate the bearings, improving the timeliness of lubrication.

[0068] In some embodiments, the lubricating oil delivery control element includes: an oil drain valve; a second opening is provided at the bottom of the insulated oil tank; the second opening is provided with the oil drain valve; the lubrication system is disposed below the electric drive, and the lubrication system is configured with a first oil sump for receiving the lubricating oil flowing out of the insulated oil tank system from the second opening.

[0069] In the above embodiments, the first oil pan is located below the electric drive and is used to receive the lubricating oil flowing out of the electric drive.

[0070] In some embodiments, the auxiliary lubrication system further includes a fluid replenishment system; the lubricating oil delivery control element further includes a second oil pump; the fluid replenishment system and the insulated oil tank system are connected via a fourth oil circuit, and the second oil pump is provided on the fourth oil circuit.

[0071] In the above implementation process, based on the second oil pump, when the lubricating oil in the vehicle's insulated oil tank system is insufficient, the compensation system can be made to deliver a solenoid valve to the insulated oil tank system through the second oil pump.

[0072] For example, see Figure 1 This embodiment provides an auxiliary lubrication system, which includes: a lubrication system, an insulated oil tank system, and a replenishment system;

[0073] The lubrication system consists of a first oil sump 101, an oil sump temperature sensor 102, a first coarse filter 103, a first electric oil pump 104, a first fine filter 105, and a three-position three-way solenoid valve 107 (a second solenoid valve). The lubrication system is connected to the bearing components of the electric drive via a first oil circuit; the lubrication system is connected to the insulation oil tank system via a second oil circuit; and the lubrication system is connected to the rotor and stator of the electric drive motor via a third oil circuit. The first oil circuit includes at least the three-position three-way solenoid valve 107 and the first electric oil pump 104; the second oil circuit includes at least the three-position three-way solenoid valve 107 and the first electric oil pump 104. The three-position three-way solenoid valve 107 has three states: closed: the lubricating oil in the lubrication system cannot flow to the gears, bearings, and insulation oil tank system; first channel open: the lubricating oil in the lubrication system flows to the gears and bearings but cannot flow to the insulation oil tank system; second channel open: the lubricating oil in the lubrication system can flow to the insulation oil tank system but cannot flow to the gears and bearings. The third oil circuit includes at least: a second two-position two-way solenoid valve 106 (the third solenoid valve) and an oil cooler 109; the second two-position two-way solenoid valve 106 has three states: closed state: at this time, the lubricating oil in the lubrication system cannot flow to the stator and rotor of the motor; open state: at this time, the lubricating oil in the lubrication system can flow to the stator and rotor of the motor; the oil pan temperature sensor 102 is used to detect the oil temperature of the lubricating oil returning to the first oil pan 101 of the electric drive assembly.

[0074] The insulated oil tank system consists of an inner layer 201, an insulation layer 202, an outer layer 203, a one-way vent valve 204, an oil tank level sensor 205, a positive terminal of a low-voltage power supply 206, a negative terminal of a low-voltage power supply 207, an oil tank temperature sensor 208, and a first two-position two-way solenoid valve 108 (first solenoid valve).

[0075] The oil tank insulation layer 202 is located between the inner layer 201 and the outer layer 203 of the oil tank, and is equipped with an electric heating device. The heating device is connected to the positive terminal 206 and the negative terminal 207 of the low-voltage power supply, and has an oil tank temperature sensor 208 and an oil tank level sensor 205 installed inside, which can realize automatic control of oil temperature and automatic control of oil level.

[0076] The insulated oil tank is located on top of the electric drive assembly. Under the action of gravity, the lubricating oil can be opened to the gear bearing through the first two-position two-way solenoid valve 108.

[0077] The top of the insulation oil tank is equipped with a one-way vent valve 204, which can automatically release air when the internal pressure of the insulation oil tank is too high. The bottom of the insulation oil tank is equipped with an oil tank drain valve 209, which is used to drain lubricating oil in a large flow rate when starting the machine to prevent the first electric oil pump 104 from sucking in air.

[0078] The fluid replenishment system consists of a second oil pan 301 and a coarse filter 302.

[0079] The fluid replenishment system is connected to the insulated oil tank system through the fourth oil circuit. A mechanical oil pump 306 (second oil pump) is installed on the fourth oil circuit. The mechanical oil pump 306 is connected to the reduction gear set 305. The reduction gear set is driven by the hand drive motor 303. The drive motor 303 is controlled by the clutch 304.

[0080] When auxiliary lubrication is activated, the liquid level in the insulation oil tank continuously decreases. When it falls below the strong cooling oil level L2, it indicates that the liquid level in the insulation oil tank is below the critical value. If it continues to decrease, the amount of auxiliary lubricating oil cannot be guaranteed. At this time, the clutch 304 engages, and the drive motor 303 drives the reduction gear set 305, which in turn drives the mechanical oil pump 306 to pump oil, returning the oil in the second oil pan 301 to the insulation oil tank to maintain the liquid level to meet the minimum requirements for auxiliary lubrication.

[0081] The lubricating oil delivery control components include: a first two-position two-way solenoid valve 108, a second two-position two-way solenoid valve 106, an oil tank drain valve 209, a mechanical oil pump 306, a drive motor 303, a clutch 304, and a reduction gear set 305.

[0082] See Figure 2 This embodiment provides a control method for an auxiliary lubrication system. Using the aforementioned auxiliary lubrication system, the method includes:

[0083] S1: Obtain the vehicle's operating status, oil level and temperature in the insulated oil tank;

[0084] S2: Control the operating state of the lubricating oil delivery control element according to one or more of the operating state, the oil level, and the oil temperature.

[0085] In some embodiments, before S1, the states of each lubricating oil delivery control element are as follows: the first solenoid valve, the second solenoid valve, and the drain valve are in the closed state; the third solenoid valve is in the open state; and the first oil pump and the second oil pump are in the closed state.

[0086] See Figure 1 In some embodiments, the states of each lubricating oil delivery control element before S1 are as follows: the first two-position two-way solenoid valve 108 is in the open state, the second two-position two-way solenoid valve 106 is in the closed state, the three-position three-way solenoid valve 107 is in the closed state, and the first electric oil pump 104 and the mechanical oil pump 206 are in the closed state.

[0087] In the above implementation process, the working state of the lubricating oil delivery control element is controlled according to one or more of the working state, the oil level and the oil temperature, so that the lubricating oil can be at the optimal working temperature and delivered to different parts of the vehicle in a timely manner.

[0088] In some embodiments, controlling the operating state of the lubricating oil delivery control element according to one or more of the operating state, the oil level, and the oil temperature includes: when the vehicle enters a non-operating mode, controlling the second channel of the second solenoid valve to open, the third solenoid valve to close, and the first oil pump to open; when the oil level of the insulated oil tank system reaches the shutdown oil level, controlling the second solenoid valve to close, the third solenoid valve to open, and the first oil pump to close.

[0089] In some embodiments, before the vehicle enters the non-operating mode, the first solenoid valve, the second solenoid valve, and the drain valve are all in the closed state, and the third solenoid valve is in the open state.

[0090] In the above embodiments, the oil level refers to the liquid level of the lubricating oil in the first oil pan, the second oil pan, or the insulated oil tank.

[0091] In some embodiments, the non-operating mode can be when the vehicle's ignition switch is in the off state, and the sign of entering the non-operating mode is that the ignition switch is off. The operating mode can be when the ignition switch is in the on state, and the sign of entering the operating mode is that the ignition switch is on.

[0092] For example, see Figure 1 When the ignition switch is off, the second two-position two-way solenoid valve 106 is closed, the second channel of the three-position three-way solenoid valve 107 is opened (the first channel is closed at this time), and the first electric oil pump 104 is turned on. When the oil level sensor 205 detects that the oil level has reached the shutdown oil level L0, the second two-position two-way solenoid valve 106 is turned on, the three-position three-way solenoid valve 107 is turned off, and the first electric oil pump 104 is turned off.

[0093] In the above implementation process, when the ignition switch is detected to be off, the first oil pump only opens the oil circuit to the insulated oil tank, pumping the high-temperature lubricating oil in the lubrication system into the insulated oil tank until the lubricating oil level in the insulated oil tank reaches the shutdown oil level L0, ensuring that the lubricating oil in the insulated oil tank is sufficient to lubricate the gears and bearings of the vehicle when the vehicle is driven off.

[0094] In some embodiments, controlling the operating state of the lubricating oil delivery control element according to one or more of the operating state, the oil level, and the oil temperature further includes: when the vehicle is in a non-operating mode, and when the oil temperature of the insulated oil tank system is lower than a first oil temperature, turning on the heating device until the oil temperature of the insulated oil tank system is heated to a preset temperature.

[0095] For example, see Figure 1 When the oil temperature sensor 208 detects that the oil temperature in the insulated oil tank is lower than the first oil temperature, the heating device (the electric heating device is connected to the positive terminal 206 and the negative terminal 207 of the low-voltage power supply) is turned on to heat the lubricating oil in the insulated oil tank.

[0096] In the above process, when the oil temperature is lower than the first oil temperature, the heating device is turned on to heat the lubricating oil in the heat preservation oil tank system, ensuring that the lubricating oil is at the optimal working temperature, which can improve the lubrication performance when the vehicle enters the working mode again.

[0097] In some embodiments, after turning on the heating device when the oil temperature of the insulation oil tank system is lower than the insulation oil temperature, the method further includes: detecting the downtime, and turning off the heating device when the downtime is longer than a preset time.

[0098] In the above implementation process, the downtime is detected. When the downtime exceeds the preset time, the heating device is turned off to avoid power failure.

[0099] In some embodiments, controlling the operating state of the lubricating oil delivery control element according to one or more of the operating state, the oil level, and the oil temperature includes: when the vehicle enters the operating mode, controlling the drain valve to be energized until the liquid level of the insulated oil tank system reaches the start-up oil level.

[0100] For example, see Figure 1 When the ignition switch is turned on, the oil tank drain valve 209 opens, and the lubricating oil in the heat preservation oil tank begins to drain into the first oil pan 101 in a large flow until the liquid level reaches the start-up oil level L1.

[0101] In the above implementation process, a certain amount of lubricating oil is first released to the first oil pan of the lubrication system when the machine is started to prevent the first oil pump from sucking in air.

[0102] In some embodiments, when the vehicle is in operating mode and the electric drive motor speed is greater than 0, the first oil pump is opened, the first channel of the second solenoid valve is opened, and the third solenoid valve is opened.

[0103] For example, see Figure 1 The system detects whether the speed n of the drive motor 303 is greater than 0. If so, the first electric oil pump 104 works, and at the same time, the first channel of the three-position three-way solenoid valve 107 opens (the second channel is closed at this time). The second two-position two-way solenoid valve 106 opens, and the first electric oil pump 104 can pump lubricating oil to the motor stator, rotor and gear bearings at the same time, so as to meet the cooling and lubrication requirements of the electric drive assembly under normal working conditions.

[0104] In some embodiments, controlling the operating state of the lubricating oil delivery control element according to one or more of the operating state, the oil level, and the oil temperature further includes: when the vehicle is in operating mode and the oil temperature of the lubrication system is lower than a second oil temperature, controlling the first channel of the second solenoid valve to open and the first oil pump to open; when the vehicle is in operating mode and the oil temperature of the lubrication system is higher than the second oil temperature, controlling the second solenoid valve to close, the first solenoid valve and the third solenoid valve to open, and the first oil pump to open.

[0105] For example, see Figure 1 When the oil temperature sensor 102 detects that the lubricating oil temperature in the first oil pan 101 is lower than the second oil temperature Td, the first channel of the three-position three-way solenoid valve 107 opens (the second channel is closed at this time), and the second two-position two-way solenoid valve 106 opens; when the oil temperature sensor 102 detects that the lubricating oil temperature in the first oil pan 101 is higher than the second oil temperature Td, the three-position three-way solenoid valve 107 is closed, and the second two-position two-way solenoid valve 106 is opened.

[0106] When the oil pan temperature sensor 102 detects that the oil temperature in the first oil pan 101 is greater than the high-temperature oil temperature Td, the three-position three-way solenoid valve 107 and the first two-position two-way solenoid valve 108 are closed, and the second two-position two-way solenoid valve 106 is opened. The oil pumped by the first electric oil pump 104 will be used entirely for cooling the motor stator and rotor. At the same time, the oil in the heat preservation oil tank flows out by gravity to lubricate the gear bearings.

[0107] In the above process, when the lubrication system oil temperature is lower than the second oil temperature, the first oil pump simultaneously pumps lubricating oil to the motor stator and rotor and the gear bearings for cooling the motor stator and rotor and lubricating the gear bearings. When the system oil temperature is too high, the first oil pump's power is insufficient. By controlling the first solenoid valve to open and the second solenoid valve to close, the lubrication line from the first oil pump to the gear bearings is shut off, and the lubrication line from the insulated oil tank system to the gear bearings is opened, thus achieving auxiliary lubrication.

[0108] In some embodiments of the above implementation process, controlling the working state of the lubricating oil delivery control element according to one or more of the working state, the oil level, and the oil temperature includes: when the vehicle is in working mode and the oil level of the insulated oil tank system is lower than the strong cooling oil level, controlling the second oil pump to open.

[0109] For example, when the oil tank level sensor 205 detects that the oil level in the insulation oil tank is lower than the strong cooling oil level L2, the clutch 304 engages, the drive motor 303 drives the reduction gear set 305, and then drives the mechanical oil pump 306 to pump oil, pumping the oil in the second oil pan 301 back to the insulation oil tank, so as to maintain the oil level at the minimum requirement for auxiliary lubrication.

[0110] In the above process, when the oil level in the oil tank is lower than the warning value, the replenishment system controls the second oil pump to open and pump the oil to the insulated oil tank system to ensure that there is a continuous supply of lubricating oil in the insulated oil tank system.

[0111] To further elaborate on this reference Figure 3 This application provides a control method for an auxiliary lubrication system, comprising:

[0112] S31: Determine if the vehicle is in non-operating mode. If yes, execute S32; otherwise, execute S310.

[0113] S32: Control the second channel of the second solenoid valve to open, the third solenoid valve to close, and the first oil pump to open;

[0114] S33: Determine whether the oil level of the insulation oil tank system has reached the shutdown oil level. If yes, execute S34; otherwise, execute S32.

[0115] S34: Control the second solenoid valve to close, the third solenoid valve to open, and the first oil pump to close;

[0116] S35: Determine whether the oil temperature of the heat preservation oil tank system is lower than the first oil temperature. If yes, execute S36; otherwise, execute S39 (if the heating device is already in the off state, this step is not required).

[0117] S36: Turn on the heating device;

[0118] S37: Determine whether the oil temperature of the thermal insulation oil tank system is equal to the first oil temperature. If yes, proceed to S39; otherwise, proceed to S35.

[0119] S38: Determine whether the temperature of the thermal insulation oil tank system is greater than (equal to) the first oil temperature. If yes, execute S39; if no, execute S35.

[0120] S39: Turn off the heating device;

[0121] S310: Controls the opening of the oil drain valve;

[0122] S311: Determine whether the liquid level of the insulation oil tank system has reached the start-up oil level. If so, execute S312.

[0123] S312: Controls the oil drain valve to close;

[0124] S313: Determine if the motor speed of the electric drive is greater than 0. If yes, execute S314; otherwise, execute S321.

[0125] S314: Controls the first oil pump to open, the first channel of the second solenoid valve to open, and the third solenoid valve to open;

[0126] S315: Determine whether the oil temperature of the lubrication system is greater than the second oil temperature. If yes, proceed to S16; otherwise, proceed to S314.

[0127] S16: Controls the second solenoid valve to close and the first oil pump to open;

[0128] S317: Determine if the oil level in the lubrication system is lower than the forced cooling oil level; if yes, proceed to S318; if no, proceed to S319.

[0129] S318: Controls the second oil pump to open;

[0130] S319: Determine whether the oil level of the insulation oil tank system is equal to the cooling oil level. If yes, execute 320; otherwise, execute S318.

[0131] S320: Controls the second oil pump to stop working;

[0132] S321: Controls the first oil pump to shut down, and the second and first solenoid valves to shut down.

[0133] In some embodiments, before S31, the states of each lubricating oil delivery control element are as follows: the first solenoid valve, the second solenoid valve, and the drain valve are in the closed state; the third solenoid valve is in the open state; and the first oil pump and the second oil pump are in the closed state.

[0134] See Figure 1 In some embodiments, the states of each lubricating oil delivery control element before S31 are as follows: the first two-position two-way solenoid valve 108 is in the open state, the second two-position two-way solenoid valve 106 is in the closed state, the three-position three-way solenoid valve 107 is in the closed state, and the first electric oil pump 104 and the mechanical oil pump 206 are in the closed state.

[0135] See Figure 4 This application provides a control device for an auxiliary lubrication system, comprising:

[0136] Parameter acquisition module 1 is used to acquire the vehicle's working status, oil level and oil temperature in the insulation oil tank;

[0137] Control module 2 is used to control the working state of the lubricating oil delivery control element according to one or more of the working state, the oil level and the oil temperature.

[0138] This application also provides an electronic device, please refer to [link to application]. Figure 5 , Figure 5 This is a structural block diagram of an electronic device provided in an embodiment of this application. The electronic device may include a processor 51, a communication interface 52, a memory 53, and at least one communication bus 54. The communication bus 54 is used to enable direct communication between these components. In this embodiment, the communication interface 52 of the electronic device is used for signaling or data communication with other node devices. The processor 51 may be an integrated circuit chip with signal processing capabilities.

[0139] The processor 51 described above can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this application. The general-purpose processor can be a microprocessor, or the processor 51 can be any conventional processor.

[0140] The memory 53 may be, but is not limited to, random access memory (RAM), read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), etc. The memory 53 stores computer-readable instructions, which, when executed by the processor 51, allow the electronic device to perform the various steps involved in the above method embodiments.

[0141] Alternatively, the electronic device may also include a storage controller and an input / output unit.

[0142] The memory 53, memory controller, processor 51, peripheral interface, and input / output unit are electrically connected directly or indirectly to achieve data transmission or interaction. For example, these components can be electrically connected to each other through one or more communication buses 54. The processor 51 is used to execute executable modules stored in the memory 53, such as software function modules or computer programs included in electronic devices.

[0143] Input / output units are used to enable users to create tasks and set optional start periods or preset execution times for those tasks, facilitating user-server interaction. Input / output units can be, but are not limited to, a mouse and keyboard.

[0144] Understandable. Figure 5 The structure shown is for illustrative purposes only; the electronic device may also include components that are more advanced than those shown. Figure 5 The more or fewer components shown, or having the same Figure 5 The different configurations shown. Figure 5 The components shown can be implemented using hardware, software, or a combination thereof.

[0145] This application also provides a storage medium storing instructions. When the instructions are run on a computer, the computer program is executed by the processor to implement the method of the method embodiment. To avoid repetition, the method will not be described again here.

[0146] This application also provides a computer program product that, when run on a computer, causes the computer to perform the method of the method embodiment.

[0147] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can also be implemented in other ways. The apparatus embodiments described above are merely illustrative. For example, the flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code, which contains one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in a different order than those marked in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram and / or flowchart, and combinations of blocks in block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.

[0148] In addition, the functional modules in the various embodiments of this application can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0149] If a function is implemented as a software module 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 this application, in essence, or the part that contributes to the prior art, or a 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, including instructions used 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 of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0150] The above are merely embodiments of this application and are not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application. It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0151] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

[0152] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

Claims

1. An auxiliary lubrication system, characterized in that, include: Lubrication system, insulated oil tank system; The lubrication system and the insulated oil tank system are equipped with lubricating oil delivery control elements; The insulated oil tank system is equipped with a heating device; The lubricating oil delivery control element includes: a first oil pump, a first solenoid valve, a second solenoid valve, and a third solenoid valve; The insulated oil tank system is located above the bearing components of the vehicle's electric drive. A first opening is provided below the insulated oil tank system, and a first solenoid valve is provided in the first opening. Under the action of gravity, when the first solenoid valve is opened, the lubricating oil in the insulated oil tank can enter the electric drive to lubricate the bearing components of the electric drive. The lubrication system and the bearing components of the electric drive are connected through a first oil passage; The lubrication system and the insulated oil tank system are connected via a second oil circuit; The first oil circuit is equipped with the first oil pump and the second solenoid valve; When the first channel of the second solenoid valve is opened, the first oil circuit is opened; When the second channel of the second solenoid valve is opened, the second oil circuit is opened; The lubrication system and the electric drive motor are connected through a third oil circuit, and the third oil circuit is equipped with the first oil pump and the third solenoid valve. The lubricating oil delivery control element includes: an oil drain valve; The bottom of the insulated oil tank is provided with a second opening; The second opening is provided with the oil drain valve; The lubrication system is located below the electric drive, and the lubrication system is equipped with a first oil sump for receiving the lubricating oil flowing out of the heat-insulating oil tank system from the second opening; When the vehicle enters working mode, the control drain valve opens, allowing the lubricating oil in the insulation oil tank system to drain into the first oil pan until the liquid level in the insulation oil tank system reaches the start-up oil level.

2. The auxiliary lubrication system according to claim 1, characterized in that, The auxiliary lubrication system also includes: a fluid replenishment system; The fluid replenishment system includes the lubricating oil delivery control element; The lubricating oil delivery control element further includes: a second oil pump; The replenishment system and the insulated oil tank system are connected through a fourth oil circuit, and the second oil pump is installed on the fourth oil circuit.

3. A control method for an auxiliary lubrication system, applied to the auxiliary lubrication system according to any one of claims 1-2, characterized in that, The method includes: Acquire the vehicle's operating status, oil level, and oil temperature in the insulated oil tank; The operating state of the lubricating oil delivery control element is controlled according to one or more of the operating state, the oil level, and the oil temperature.

4. The control method for the auxiliary lubrication system according to claim 3, characterized in that, The method of controlling the operating state of the lubricating oil delivery control element based on one or more of the operating state, the oil level, and the oil temperature includes: When the vehicle enters non-operating mode, the second channel of the second solenoid valve opens, the third solenoid valve closes, and the first oil pump opens. When the oil level in the insulation oil tank system reaches the shutdown oil level, the second solenoid valve is closed, the third solenoid valve is opened, and the first oil pump is shut down.

5. The control method for the auxiliary lubrication system according to claim 3, characterized in that, The method of controlling the operating state of the lubricating oil delivery control element according to one or more of the operating state, the oil level, and the oil temperature further includes: When the vehicle is in non-operating mode, if the oil temperature of the insulated oil tank system is lower than the first oil temperature, the heating device is turned on until the oil temperature of the insulated oil tank system is heated to the preset temperature.

6. The control method for the auxiliary lubrication system according to claim 5, characterized in that, After activating the heating device when the oil temperature of the insulated oil tank system is lower than the first oil temperature, the method further includes: The system detects the downtime and shuts down the heating device when the downtime exceeds a preset duration.

7. The control method for the auxiliary lubrication system according to claim 3, characterized in that, The method of controlling the operating state of the lubricating oil delivery control element based on one or more of the operating state, the oil level, and the oil temperature includes: When the vehicle enters working mode, the control drain valve opens until the liquid level in the insulation oil tank system reaches the start-up oil level.

8. The control method for the auxiliary lubrication system according to claim 7, characterized in that, When the vehicle is in working mode and the electric drive motor speed is greater than 0, the first oil pump is opened, the first channel of the second solenoid valve is opened, and the third solenoid valve is opened.

9. The control method for the auxiliary lubrication system according to claim 3, characterized in that, The method of controlling the operating state of the lubricating oil delivery control element according to one or more of the operating state, the oil level, and the oil temperature further includes: When the vehicle is in working mode and the oil temperature of the lubrication system is lower than the second oil temperature, the first channel of the second solenoid valve opens, the first oil pump opens, and the third solenoid valve opens. When the vehicle is in working mode and the oil temperature of the lubrication system is greater than the second oil temperature, the second solenoid valve is closed, the first solenoid valve and the third solenoid valve are opened, and the first oil pump is turned on.

10. The control method for the auxiliary lubrication system according to claim 3, characterized in that, The method of controlling the operating state of the lubricating oil delivery control element based on one or more of the operating state, the oil level, and the oil temperature includes: When the vehicle is in working mode, if the oil level in the insulated oil tank system is lower than the strong cooling oil level, the second oil pump is activated.

11. The control method for the auxiliary lubrication system according to any one of claims 3 to 10, characterized in that, Before obtaining the vehicle's operating status, the oil level in the insulated oil tank, and the oil temperature... The first and second oil pumps of the auxiliary lubrication system are in the off state, the second and third solenoid valves of the auxiliary lubrication system are in the off state, and the first solenoid valve of the auxiliary lubrication system is in the open state.

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