An assembly active lubrication control system and method based on micro-lubrication state

Abstract

The present invention is an assembly active lubrication control system and method based on micro-lubrication state. The present invention relates to the field of active lubrication control technology, and the system includes: a controller, an oil pump, a torque sensor, a speed sensor, a drive axle bridge package, an oil storage tank, a relief valve and a reversing valve; the controller controls the oil pump and receives sensor signals from the speed sensor and the torque sensor; the controller controls the connection reversing valve, the reversing valve is connected to the drive axle bridge package, and the torque sensor and the speed sensor collect the sensor signal of the drive axle bridge package. The present invention adopts a method for controlling the lubrication of the gear unit, monitors parameters such as lubricating oil temperature, viscosity, density, torque and speed in real time, iterates the oil film thickness of the contact area through the lubrication model, and then solves the film thickness ratio according to the roughness value of the gear surface, limits the input speed and torque, until elastic fluid dynamic lubrication is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of active lubrication control, and is an assembly active lubrication control system and method based on micro-lubrication state. Background Art

[0002] The existing drive axle main reducer uses gear oil to lubricate and cool the gears in the reducer. A rated amount of gear oil is added to the drive axle bridge pack each time. After a service cycle, the gear oil in the bridge pack is completely replaced to ensure the lubrication and cooling of the main reducer gears. However, during the service life of the gear oil, there is no control or detection of the use of the gear oil. This lubrication and cooling method has the following problems:

[0003] Regardless of the working conditions, the amount of gear oil carried by the main reducer gear remains unchanged. When the main reducer is in a low-speed / low-temperature working state, the main reducer gear does not need too much lubricating oil to ensure the normal operation of the main reducer and sufficient cooling and temperature reduction, and to ensure sufficient lubrication of the gear, which leads to an excess of gear oil for lubrication, resulting in waste. At the same time, the gears carry excess lubricating oil to rotate, resulting in greater resistance and more energy loss;

[0004] The lubrication method shown in patent CN 103062378 A "Method for controlling lubrication of gear unit and gear unit" is listed here: Figure 1 As shown, the lubrication method for controlling the gear unit described in patent CN 103062378 A measures the temperature of the lubricating fluid during the operation of the gear unit, and controls the height and circulating fluidity of the lubricating oil in the housing by controlling the lubrication pump and the controllable valve to determine which of the following lubrication methods to use: splash lubrication, circulation lubrication, or a combination of the two lubrication methods, so as to achieve the purpose of reducing oil stirring loss. However, during the actual operation of the gear, the most important area affecting the gear meshing operation performance is the contact area. On the one hand, the temperature measurement value in this patent cannot fully represent the lubrication state of the gear contact area, and the actual lubrication performance of the gear cannot be reflected by a single temperature factor. This patent is suitable for medium and low load conditions. For medium and high load conditions, there is a judgment hysteresis phenomenon, and it is impossible to avoid tooth surface wear from the root.

[0005] The lubrication method for controlling the gear unit described in patent CN 103062378 A measures the temperature of the lubricating fluid during the operation of the gear unit, controls the height and circulating fluidity of the lubricating oil in the housing by controlling the lubrication pump and the controllable valve, and determines which of the following lubrication methods to use: splash lubrication, circulation lubrication, or a combination of the two lubrication methods, so as to achieve the purpose of reducing oil stirring loss. However, during the actual operation of the gear, the most important area affecting the meshing performance of the gear is the contact area. On the one hand, the temperature measurement value in this patent cannot fully represent the lubrication state of the gear contact area, and the actual lubrication performance of the gear cannot be reflected by a single temperature factor. This patent is suitable for medium and low load conditions. For medium and high load conditions, there is a judgment hysteresis phenomenon, and it is impossible to avoid tooth surface wear from the root.

[0006] Patent CN 104534070 A describes a gear oil circulation control system for a main reducer of a bus, specifically a gear oil circulation control system for a main reducer of a bus, including a power supply, a controller, an oil pump, a drive axle bridge package, an oil storage tank, a filter and a reversing valve. By setting a temperature and pressure sensor on the drive axle bridge package, the temperature and pressure of the gear oil in the bridge package are detected respectively. The controller controls the oil pump to deliver or release the gear oil into the bridge package according to the information. However, the purpose of this patent is to accurately control the amount of gear oil and reduce unnecessary oil stirring losses. The purity of the gear oil is ensured by the filtering device, thereby ensuring the service life of the gear.

[0007] Patent CN 201262225 Y describes a circulation system with a forced internal lubrication structure, specifically a cooling system for the external circulation of the lubricating oil of the drive axle. The drive axle assembly includes an external oil pipe, a cooling oil pump integrated with the active bevel gear is provided in the assembly, and a lubricating oil channel is provided on the bracket. When the drive axle assembly is working, the cooling oil pump sucks the lubricating oil at the bottom of the drive axle assembly through the lubricating oil channel, and the lubricating oil enters the axle housing through the external oil pipe. The cooled lubricating oil enters the bracket of the central reducer through the internal oil pipe, the internal oil channel of the support shaft, and the inner hole of the axle housing, and finally returns to the drive axle assembly. Obviously, the purpose of this patent is to improve the cooling effect of the lubricating oil of the drive axle assembly through structural improvement and the introduction of a cooling system. Summary of the invention

[0008] In order to overcome the deficiencies of the prior art, the present invention provides an assembly active lubrication control system and method based on micro-lubrication state.

[0009] The present invention provides an assembly active lubrication control system and method based on micro-lubrication state, and the present invention provides the following technical solutions:

[0010] An assembly active lubrication control based on micro-lubrication state, the system comprising: a controller, an oil pump, a torque sensor, a speed sensor, a drive axle bridge package, an oil storage tank, a relief valve and a reversing valve;

[0011] The controller controls the oil pump and receives sensing signals from the speed sensor and the torque sensor; the oil pump is connected to an oil storage tank, and the oil storage tank is connected to a relief valve;

[0012] The oil storage tank is connected to the reversing valve, the controller controls the connection of the reversing valve, the reversing valve is connected to the drive axle bridge pack, the torque sensor and the speed sensor collect sensor signals of the drive axle bridge pack, and the controller controls the connection of the drive axle bridge pack.

[0013] Preferably, the drive axle bridge package includes a fuel injector, a temperature sensor and a viscosity density sensor;

[0014] The temperature sensor and viscosity density sensor detect the temperature, viscosity and density of the lubricating oil in the gear contact area within the bridge package, and transmit the collected temperature, viscosity and density to the controller. The reversing valve is connected to the oil injector.

[0015] Preferably, the temperature sensor is directly aligned with the contact area of ​​the master and slave teeth to accurately collect temperature data.

[0016] Preferably, the system further comprises a filter, wherein the filter is arranged between the oil storage tank and the reversing valve, and the overflow device is arranged between the oil storage tank and the filter.

[0017] Preferably, the controller imposes certain restrictions on the input speed and torque of the main teeth based on the collected torque and speed information, when the temperature is too high or the film thickness ratio of the contact area reaches a certain limit, so as to increase the service life of the bridge assembly.

[0018] An assembly active lubrication control method based on micro-lubrication state, the method comprising the following steps:

[0019] Step 1: The controller controls the temperature sensor to monitor the lubricating oil temperature in the gear contact area in real time, the viscosity and density sensor to monitor the viscosity and density of the lubricating oil in real time, and the torque sensor and speed sensor to monitor the input torque and speed of the drive axle in real time to obtain the real-time data of the gear;

[0020] Step 2: The controller collects real-time data of the gear, and combines the gear's own parameters to establish an elastohydrodynamic lubrication pair model of the variable temperature contact zone that takes into account the viscosity-pressure effect and the compaction-pressure effect;

[0021] Step 3: Determine the minimum oil film thickness of the contact area through iteration, and judge the lubrication state of the contact area according to the film thickness ratio;

[0022] Step 4: Control the oil injection according to the lubrication status to protect the gears and extend their service life.

[0023] Preferably, when the oil temperature is less than 140°C;

[0024] When the film thickness ratio λ≥4, the gear pair is judged to be in the state of elastic hydrodynamic lubrication, and the injection amount and injection speed of the lubricating oil in the contact area remain unchanged at the first gear;

[0025] When the film thickness ratio is 1<λ<4, the gear pair is judged to be in a mixed lubrication state, and the oil injection amount and injection speed in the contact area are increased, and the oil injection amount and injection speed are changed to the second gear;

[0026] When the film thickness ratio λ≤1, the gear pair is judged to be in the boundary lubrication state. The oil injection amount and injection speed in the contact area continue to be increased, and the oil injection amount and injection speed are changed to gear 3. At the same time, the input speed and torque are limited until the elastic fluid dynamic lubrication state is reached.

[0027] A computer-readable storage medium stores a computer program, which is executed by a processor to implement an assembly active lubrication control method based on micro-lubrication state.

[0028] A computer device comprises a memory and a processor, wherein the memory stores a computer program, and the processor implements an assembly active lubrication control method based on micro-lubrication state when executing the computer program.

[0029] A vehicle comprises: a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the assembly active lubrication control method based on micro-lubrication state.

[0030] The present invention has the following beneficial effects:

[0031] The present invention adopts a method for controlling the lubrication of the gear unit, monitors parameters such as lubricating oil temperature, viscosity, density, torque and speed in real time, iterates and solves the oil film thickness of the contact area through the lubrication model, and then solves the film thickness ratio according to the roughness value of the gear surface, and judges whether the contact area is in elastic fluid dynamic lubrication, mixed lubrication or boundary lubrication. If it is in elastic fluid dynamic lubrication, the injection amount and injection speed of the lubricating oil remain unchanged. If it is in mixed lubrication, the fixed-point injection amount and injection speed of the contact area are increased. If it is in boundary lubrication, the input speed and torque are limited until elastic fluid dynamic lubrication is achieved. Solve the problem that the actual lubrication performance judgment hysteresis of the contact area cannot be reflected by a single temperature factor in the patent in the background technology. In addition, the method mentioned in the present invention is particularly suitable for medium and high load conditions, laying a foundation for exerting the highest performance of the drive axle.

[0032] The gear oil in the drive axle bridge package provided by the present invention has the main function of lubrication and cooling during the service life, and the ultimate goal is to protect the lubrication state of the gear, prevent excessive wear, and increase the life of the gear. The lubrication state of the contact area has the greatest impact on the life of the gear, but the existing technical solutions are based on macro parameters such as the temperature and pressure of the lubricating oil, which are judged in an indirect way. There are problems such as incomplete judgments such as hysteresis in the judgment mechanism, and the fundamental element of the lubrication state of the contact area cannot be well grasped. The present invention uses a judgment mechanism for the micro-lubrication state, and then a method for judging the lubrication state of the gear, which fundamentally solves the problems of hysteresis and inaccurate judgment, and has timeliness, accuracy and advancement. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 A method for controlling lubrication of a gear unit and a gear unit are provided;

[0035] Figure 2 The schematic diagram of the active lubrication control method for the assembly is shown;

[0036] Figure 3 It is a flow chart of the active lubrication control method based on micro-lubrication state;

[0037] Figure 4 Control flow chart for adding neural network model;

[0038] Figure 5 The neural network model architecture. DETAILED DESCRIPTION

[0039] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0041] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0043] The present invention is described in detail below in conjunction with specific embodiments. Specific embodiment one:

[0045] according to Figures 2 to 3 As shown, the specific optimization technical solution adopted by the present invention to solve the above technical problems is: the present invention relates to an assembly active lubrication control system and method based on micro-lubrication state.

[0046] An assembly active lubrication control based on micro-lubrication state, the system comprising: a controller, an oil pump, a torque sensor, a speed sensor, a drive axle bridge package, an oil storage tank, a relief valve and a reversing valve;

[0047] The controller controls the oil pump and receives sensing signals from the speed sensor and the torque sensor; the oil pump is connected to an oil storage tank, and the oil storage tank is connected to a relief valve;

[0048] The oil storage tank is connected to the reversing valve, the controller controls the connection of the reversing valve, the reversing valve is connected to the drive axle bridge pack, the torque sensor and the speed sensor collect sensor signals of the drive axle bridge pack, and the controller controls the connection of the drive axle bridge pack.

[0049] The most beneficial effect of this patent is to ensure the life of the gears by finely controlling the amount of gear oil used and the precise control of the lubrication state of the contact area. It is a common operation in this field to ensure the purity of the oil through the filtering device and thus ensure the life. The gear oil in the drive axle bridge package provided by the present invention has the main function of lubrication and cooling during the use cycle. The ultimate goal is to protect the lubrication state of the gears, prevent excessive wear, and increase the life of the gears. Specific embodiment 2:

[0051] The difference between the second embodiment of the present application and the first embodiment is that:

[0052] The drive axle bridge package includes a fuel injector, a temperature sensor and a viscosity density sensor;

[0053] The temperature sensor and viscosity density sensor detect the temperature, viscosity and density of the lubricating oil in the gear contact area within the bridge package, and transmit the collected temperature, viscosity and density to the controller. The reversing valve is connected to the oil injector. Specific embodiment three:

[0055] The difference between the third embodiment of the present application and the second embodiment is that:

[0056] The temperature sensor is directly aimed at the contact area of ​​the master and slave teeth to accurately collect temperature data. Specific embodiment four:

[0058] The difference between the fourth embodiment of the present application and the third embodiment is that:

[0059] The system further comprises a filter, which is arranged between the oil storage tank and the reversing valve, and the overflow device is arranged between the oil storage tank and the filter. Specific embodiment five:

[0061] The difference between the fifth embodiment of the present application and the fourth embodiment is that:

[0062] The controller imposes certain restrictions on the input speed and torque of the main teeth based on the collected torque and speed information, when the temperature is too high or the film thickness ratio of the contact area reaches a certain limit, thereby increasing the service life of the bridge assembly. Specific embodiment six:

[0064] The difference between the sixth embodiment of the present application and the fifth embodiment is that:

[0065] The present invention provides an assembly active lubrication control method based on micro-lubrication state, the method comprising the following steps:

[0066] Step 1: The controller controls the temperature sensor to monitor the lubricating oil temperature in the gear contact area in real time, the viscosity and density sensor to monitor the viscosity and density of the lubricating oil in real time, and the torque sensor and speed sensor to monitor the input torque and speed of the drive axle in real time to obtain the real-time data of the gear;

[0067] Step 2: The controller collects real-time data of the gear, and combines the gear's own parameters to establish an elastohydrodynamic lubrication pair model of the variable temperature contact zone that takes into account the viscosity-pressure effect and the compaction-pressure effect;

[0068] Step 3: Determine the minimum oil film thickness of the contact area through iteration, and judge the lubrication state of the contact area according to the film thickness ratio;

[0069] Step 4: Control the oil injection according to the lubrication status to protect the gears and extend their service life.

[0070] The present invention can finely control the amount of gear oil according to the lubrication state of the contact area, which is more sophisticated than the macroscopic control based on temperature and pressure information; the method mentioned in the present invention is particularly suitable for medium and high load conditions, laying the foundation for exerting the highest performance of the drive axle.

[0071] The present invention establishes a new method for improving the cooling effect of the lubricating oil of the drive axle assembly and improving the life of the assembly by more accurately judging the micro-lubrication state. Specific embodiment seven:

[0073] The difference between the seventh embodiment of the present application and the sixth embodiment is that:

[0074] Combined with the gear's own parameters, a variable temperature contact zone elastohydrodynamic lubrication pair model considering the viscosity-pressure effect and the density-pressure effect is established. The film thickness equation, load balance equation, viscosity-pressure-temperature relationship, density-pressure-temperature relationship, and oil film energy equation are combined to iteratively solve the minimum oil film thickness in the contact zone. Then, the lubrication state of the contact zone is judged according to the film thickness ratio. This method also adds a protection mode for the extreme oil temperature. The specific judgment process is as follows:

[0075] When the oil temperature is less than 140℃,

[0076] When the film thickness ratio λ≥4, the gear pair is judged to be in the state of elastic hydrodynamic lubrication, and the injection amount and injection speed of the lubricating oil in the contact area remain unchanged at the first gear;

[0077] When the film thickness ratio is 1<λ<4, the gear pair is judged to be in a mixed lubrication state, and the oil injection amount and injection speed in the contact area are increased, and the oil injection amount and injection speed are changed to the second gear;

[0078] When the film thickness ratio λ≤1, the gear pair is judged to be in the boundary lubrication state. The oil injection amount and injection speed in the contact area continue to be increased, and the oil injection amount and injection speed are changed to gear 3. At the same time, the input speed and torque are limited until the elastic fluid dynamic lubrication state is reached.

[0079] When the oil temperature is greater than 140°C, the injection amount and injection speed are changed to the third gear, and the input speed and torque are limited until the elastic fluid dynamic lubrication state is reached. In principle, after adopting this control method, 140°C will basically not be reached, but it is not ruled out that the oil temperature will instantly reach the limit value due to some extremely harsh working conditions, so a double insurance solution is adopted here to improve the robustness of the control system. Of course, it is also possible to set insurance conditions from more levels from the perspective of torque, speed and the rate of change of the lubricant's own parameters to ensure the stable operation of the active lubrication system.

[0080] according to Figure 4-Figure 5 As shown, on the basis of the present embodiment, the present application adds a second control mechanism for the injection amount and injection speed, takes the lubricating oil temperature, viscosity, density, calculated film thickness ratio, and input torque and speed of the drive axle as input, and takes the lubricating oil injection speed and injection amount as output, to establish a neural network model, which can accurately control the lubrication state of the gears. When the injection amount and injection speed gears of the two methods are inconsistent, the highest-level injection amount and injection speed are used. Specific embodiment eight:

[0082] The difference between the eighth embodiment of the present application and the seventh embodiment is only that:

[0083] The present invention provides a computer-readable storage medium on which a computer program is stored. The program is executed by a processor and is used for an assembly active lubrication control method based on a micro-lubrication state. Specific embodiment nine:

[0085] The difference between the ninth embodiment of the present application and the eighth embodiment is that:

[0086] The present invention provides a computer device, comprising a memory and a processor, wherein the memory stores a computer program, and the processor implements an assembly active lubrication control method based on a micro-lubrication state when executing the computer program. Specific embodiment ten:

[0088] The difference between the tenth embodiment of the present application and the ninth embodiment is that:

[0089] The present invention provides a vehicle, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement an assembly active lubrication control method based on micro-lubrication state. Specific embodiment eleven:

[0091] The difference between the eleventh embodiment of the present application and the tenth embodiment is that:

[0092] The present invention sets a temperature, viscosity and density sensor on the drive axle bridge package to detect the temperature, viscosity and density of the lubricating oil in the gear contact area in the bridge package. It is particularly important to note that the temperature sensor is directly aligned with the contact area of ​​the master and slave teeth to facilitate the collection of more accurate temperature data. The above temperature, viscosity and density information are fed back to the controller. The controller controls the oil pump and the oil injector according to the information to deliver lubricating oil with different gear injection amounts and injection speeds to the drive axle bridge package, so as to achieve the purpose of accurately controlling the amount of gear oil and reducing the loss caused by oil stirring. The torque sensor and the speed sensor collect the input torque and speed of the main gear. The above torque and speed information are fed back to the controller. If the temperature is too high or the film thickness ratio of the contact area reaches a certain limit, the controller will impose certain restrictions on the input speed and torque of the main gear according to the information, so as to achieve the purpose of increasing the service life of the bridge assembly. A filter is set in the oil circuit to ensure the purity of the delivered gear oil.

[0093] The present invention establishes an elastohydrodynamic lubrication pair model of a variable temperature contact zone based on the temperature, viscosity and density of the lubricating oil in the contact zone, calculates the minimum oil film thickness of the gear contact zone under the microscopic state, and then obtains the real-time film thickness ratio based on the roughness value to judge the lubrication state of the gear contact zone. Previous patents all made rough judgments based on macroscopic parameters, which is inaccurate. The method proposed by the present invention is a more accurate and reliable method for judging under the microscopic state.

[0094] The above is only a preferred implementation of an assembly active lubrication control system and method based on micro-lubrication state. The protection scope of an assembly active lubrication control system and method based on micro-lubrication state is not limited to the above embodiment. All technical solutions under this idea belong to the protection scope of the present invention. It should be pointed out that for those skilled in the art, several improvements and changes without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. An assembly active lubrication control method based on micro-lubrication state, the method is based on an assembly active lubrication control system based on micro-lubrication state, the system comprising: Controller, oil pump, torque sensor, speed sensor, drive axle bridge package, oil storage tank, overflow valve and reversing valve; The controller controls the oil pump and receives sensing signals from the speed sensor and the torque sensor; the oil pump is connected to an oil storage tank, and the oil storage tank is connected to a relief valve; The oil storage tank is connected to the reversing valve, the controller controls the connection of the reversing valve, the reversing valve is connected to the drive axle bridge pack, the torque sensor and the speed sensor collect sensor signals of the drive axle bridge pack, and the controller controls the connection of the drive axle bridge pack, wherein the method comprises the following steps: Step 1: The controller controls the temperature sensor to monitor the lubricating oil temperature in the gear contact area in real time, the viscosity and density sensor to monitor the viscosity and density of the lubricating oil in real time, and the torque sensor and speed sensor to monitor the input torque and speed of the drive axle in real time to obtain the real-time data of the gear; Step 2: The controller collects the real-time data of the gear, and combines the gear's own parameters to establish an elastohydrodynamic lubrication pair model of the variable temperature contact zone that takes into account the viscosity-pressure effect and the compaction-pressure effect; Step 3: Determine the minimum oil film thickness of the contact area through iteration, and judge the lubrication state of the contact area according to the film thickness ratio; Step 4: Control the oil injection according to the lubrication status to protect the gears and extend their service life.

2. The assembly active lubrication control method based on micro-lubrication state according to claim 1 is characterized by: When the oil temperature is less than 140℃, When the film thickness ratio λ≥4, the gear pair is judged to be in the state of elastic hydrodynamic lubrication, and the injection amount and injection speed of the lubricating oil in the contact area remain unchanged at the first gear; When the film thickness ratio is 1<λ<4, the gear pair is judged to be in a mixed lubrication state, and the oil injection amount and injection speed in the contact area are increased, and the oil injection amount and injection speed are changed to the second gear; When the film thickness ratio λ≤1, the gear pair is judged to be in the boundary lubrication state. The oil injection amount and injection speed in the contact area continue to be increased, and the oil injection amount and injection speed are changed to gear 3. At the same time, the input speed and torque are limited until the elastic fluid dynamic lubrication state is reached.

3. The assembly active lubrication control method based on micro-lubrication state according to claim 1 is characterized by: The drive axle bridge package includes a fuel injector, a temperature sensor and a viscosity density sensor; The temperature sensor and viscosity density sensor detect the temperature, viscosity and density of the lubricating oil in the gear contact area within the bridge package, and transmit the collected temperature, viscosity and density to the controller. The reversing valve is connected to the oil injector.

4. The assembly active lubrication control method based on micro-lubrication state according to claim 3 is characterized by: The temperature sensor is directly aimed at the contact area of ​​the master and slave teeth to accurately collect temperature data.

5. The assembly active lubrication control method based on micro-lubrication state according to claim 4 is characterized by: The system further comprises a filter, which is arranged between the oil storage tank and the reversing valve, and the overflow device is arranged between the oil storage tank and the filter.

6. The assembly active lubrication control method based on micro-lubrication state according to claim 5 is characterized by: The controller imposes certain restrictions on the input speed and torque of the main teeth based on the collected torque and speed information, when the temperature is too high or the film thickness ratio of the contact area reaches a certain limit, thereby increasing the service life of the bridge assembly.

7. A computer-readable storage medium having a computer program stored thereon, characterized in that: The program is executed by a processor to implement the assembly active lubrication control method based on micro-lubrication state as described in any one of claims 1 to 6.

8. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the assembly active lubrication control method based on micro-lubrication state described in any one of claims 1-6 is implemented.

9. A vehicle, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the assembly active lubrication control method based on micro-lubrication state as described in any one of claims 1 to 6.

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