Active lubrication control device and method for intermediate shaft brake and vehicle

Abstract

The invention relates to an active lubrication control device and method for an intermediate shaft brake and a vehicle, and belongs to the technical field of transmissions.The device comprises an automatic gearbox control unit used for generating a lubrication control instruction when it is determined that the vehicle needs to upshift and sending the lubrication control instruction; the switching device is in communication connection with the automatic gearbox control unit and used for receiving the lubrication control instruction and then switching a valve in the switching device from a closed state to an open state; and the intermediate shaft brake lubricating oil pipe is connected with the switching device through a pipeline and is used for inputting lubricating oil into the intermediate shaft brake when a valve in the switching device is in an open state. When the automatic gearbox control unit controls the intermediate shaft brake to work in the upshift clearance, the switching device is opened, and when upshift is finished and the intermediate shaft brake does not work, the switching device is closed, so that it is guaranteed that the intermediate shaft brake is fully lubricated in the working process.

Description

Technical Field

[0001] The present invention relates to the technical field of transmissions, and in particular to an active lubrication control device and method for an intermediate shaft brake and a vehicle. Background Art

[0002] AMT gearbox is also called automatic gearbox, which is the abbreviation of electronically controlled mechanical automatic gearbox. It is an automatic transmission system controlled by a microcomputer installed on the basis of dry clutch and gear transmission. This gearbox can determine the best gear according to parameters such as vehicle speed, throttle, driver's instructions, etc., and control the clutch separation and engagement, gear shifting and shifting of the shift handle, synchronous adjustment of the engine throttle opening, etc., which are manually completed by the driver, and finally realize the automation of the gear shifting process.

[0003] The prior art is to open an oil guide hole in the front housing of the gearbox to introduce the lubricating oil after lubricating the front bearing of one shaft into the intermediate shaft brake. Although this method can play a certain lubricating role on the intermediate shaft brake, the oil guide hole is located at the end of the lubrication system, resulting in a small amount of oil and poor lubrication effect on the intermediate shaft brake. In addition, since the intermediate shaft brake has a short working time and generates a lot of heat in a short time, a large amount of lubricating oil is required to lubricate it.

[0004] In summary, the prior art lacks an active lubrication control device for an intermediate shaft brake to improve the lubrication effect of the intermediate shaft brake. Summary of the invention

[0005] In view of this, it is necessary to provide an intermediate shaft brake active lubrication control device, method and vehicle to solve the problem of poor lubrication effect of the intermediate shaft brake in the prior art.

[0006] In order to solve the above problems, in a first aspect, the present invention provides an active lubrication control device for an intermediate shaft brake, comprising: An automatic transmission control unit, for generating a lubrication control instruction when determining that the vehicle needs to shift up, and sending the lubrication control instruction; A switching device, connected in communication with the automatic transmission control unit, for switching the valve inside the switching device from a closed state to an open state after receiving the lubrication control instruction; The intermediate shaft brake lubricating oil pipe is connected to the switching device through a pipeline, and is used to input lubricating oil into the intermediate shaft brake when the valve inside the switching device is in an open state.

[0007] In a possible implementation, the automatic transmission control unit is used to obtain a current gear position and a target gear position of the vehicle, and determine whether the vehicle needs to shift up based on the current gear position and the target gear position.

[0008] In a possible implementation, the automatic transmission control unit is used to obtain a current gear position and a target gear position of the vehicle, and when it is determined that the current gear position is smaller than the target gear position, it is determined that the vehicle needs to shift up.

[0009] In a possible implementation, when the automatic transmission control unit determines that the vehicle does not need to shift up, it sends a power-off control command to the valve of the intermediate shaft brake and simultaneously sends a closing control signal to the switching device; The switching device receives the closing control signal to control the internal valve to switch from an open state to a closed state, thereby blocking the lubricating oil from being input into the intermediate shaft brake through the intermediate shaft brake lubricating oil pipe.

[0010] In a possible implementation manner, the switching device is also connected to an oil supply component.

[0011] In a second aspect, the present invention further provides an intermediate shaft brake active lubrication control method, the intermediate shaft brake active lubrication control method is based on the intermediate shaft brake active lubrication control device described in any one of the above implementations, the method comprising: When the vehicle needs to shift up a gear, the automatic transmission control unit generates a lubrication control instruction and sends it to the switching device to control the valve inside the switching device to switch from a closed state to an open state, so that when the valve inside the switching device is in the open state, the intermediate shaft brake lubrication oil pipe inputs lubricating oil to the intermediate shaft brake.

[0012] In a possible implementation, when the vehicle needs to shift up, the automatic transmission control unit generates a lubrication control instruction and sends it to the switching device, including: The automatic transmission control unit determines that the current gear is less than the target gear and determines that an upshift is required; When determining that the vehicle is shifting up, the automatic transmission control unit generates a lubrication control instruction and sends it to the switching device.

[0013] In a possible implementation, the method further includes: When the automatic transmission control unit determines that the vehicle does not need to shift up, it sends a power-off control command to the valve of the intermediate shaft brake to control the intermediate shaft brake to stop working, and at the same time sends a closing control signal to the switching device to control the valve inside the switching device to switch from an open state to a closed state, thereby blocking the lubricating oil from being input into the intermediate shaft brake through the intermediate shaft brake lubricating oil pipe.

[0014] In a possible implementation, when the automatic transmission control unit determines that the vehicle does not need to shift up, the process includes: The automatic transmission control unit determines that the current gear is not less than the target gear and determines that the vehicle does not need to shift up.

[0015] In a third aspect, the present invention further provides a vehicle, wherein the vehicle is based on the active lubrication control device for the intermediate shaft brake described in any one of the above-mentioned implementation modes.

[0016] The beneficial effects of the present invention are as follows: the present invention provides an active lubrication control device, method and vehicle for an intermediate shaft brake, the device comprises an automatic transmission control unit, a switching device and an intermediate shaft brake lubricating oil pipe, the automatic transmission control unit is used to generate a lubrication control instruction when determining that the vehicle needs to shift up, and send the lubrication control instruction, the switching device is connected to the automatic transmission control unit in communication, and is used to switch the valve inside the switching device from a closed state to an open state after receiving the lubrication control instruction, so that the automatic transmission control unit controls the intermediate shaft brake to open the switching device when it is working, and close the switching device when the intermediate shaft brake is not working, so as to ensure that the intermediate shaft brake is fully lubricated when working, and the intermediate shaft brake lubricating oil pipe is connected to the switching device through a pipeline, and is used to input lubricating oil into the intermediate shaft brake when the valve inside the switching device is in an open state. The present invention controls the intermediate shaft brake to open the switching device when it is working during the shift-up gap through the automatic transmission control unit, and closes the switching device when the intermediate shaft brake is not working after the shift-up is completed, so as to ensure that the intermediate shaft brake is fully lubricated when working. This design can achieve full lubrication of the intermediate shaft brake without affecting the lubrication of other parts of the gearbox. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of an intermediate shaft brake in the prior art; Figure 2 Schematic diagram of the oil circuit of the AMT lubrication system of the present invention; Figure 3 A schematic structural diagram of an embodiment of an active lubrication control device for an intermediate shaft brake provided by the present invention; Among them, 301, TCU; 302, switching device; 303, intermediate shaft brake lubricating oil pipe. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0019] In the description of the embodiments of the present application, unless otherwise specified, “plurality” means two or more than two.

[0020] The terms "including" and "having" and any variations thereof in the embodiments of the present invention are intended to cover non-exclusive inclusions. For example, a process, method, apparatus, product or equipment comprising a series of steps or modules is not necessarily limited to those steps or modules clearly listed, but may include other steps or modules not clearly listed or inherent to these processes, methods, products or equipment.

[0021] The naming or numbering of the steps in the embodiments of the present invention does not mean that the steps in the method flow must be executed in the time / logical sequence indicated by the naming or numbering. The execution order of the named or numbered process steps can be changed according to the technical purpose to be achieved, as long as the same or similar technical effects can be achieved.

[0022] Reference to an "embodiment" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0023] Before presenting the embodiments, the following terms are explained.

[0024] Automated Manual Transmission (AMT), AMT transmission is essentially developed on the basis of traditional manual transmission. It retains the basic structural components of manual transmission, such as gear sets, shafts, synchronizers, etc. For example, the gear transmission part of AMT transmission used in some small cars is similar to that of manual transmission, with input shaft, output shaft and gears for each gear.

[0025] Adding electronic control and actuators: To achieve the automatic shifting function, AMT adds an electronic control unit (ECU), sensors (such as speed sensors, gear position sensors, etc.) and actuators (such as hydraulic or electric shift actuators, clutch actuators, etc.). These sensors are responsible for collecting various operating parameters of the vehicle, such as engine speed, vehicle speed, accelerator pedal position, etc., and transmit the information to the electronic control unit.

[0026] Working Principle Clutch Control: During the gear shifting process, the electronic control unit determines the timing of the gear shift based on the collected information. When a gear shift is required, the clutch actuator is first used to control the clutch to disengage, just like the driver pressing the clutch pedal. For example, when the vehicle starts, the ECU commands the clutch actuator to gradually disengage the clutch based on the information that the engine speed and vehicle speed are zero to prevent the engine from stalling.

[0027] Shifting operation: After the clutch is disengaged, the shift actuator performs the shifting action according to the ECU's instructions, moving the shift fork to switch different gears. After the shifting is completed, the clutch actuator controls the clutch to engage. During the whole process, the ECU ensures the smoothness and timeliness of the shifting by precisely controlling the action of the actuator.

[0028] The Transmission Control Unit (TCU) is a key electronic control unit in the automotive field. Its main responsibility is to comprehensively monitor and manage the operation and functions of the vehicle transmission (whether automatic or manual). By receiving signals from the engine control module and other sensors, the TCU can accurately determine the best shifting time, speed and gear position based on preset programs and data, thereby achieving the purpose of optimizing fuel consumption and improving driving performance.

[0029] In modern cars, the role of TCU cannot be ignored. It can dynamically adjust the working mode of the transmission according to the real-time driving conditions and the driver's intentions to ensure a smoother driving process. What's more worth mentioning is that TCU also has the ability to learn and can fine-tune the performance of the transmission by analyzing the driver's habits and driving environment, thereby further improving driving comfort and safety.

[0030] Compared with traditional manual transmissions, automatic transmissions equipped with TCU are more intelligent and can better adapt to changing driving scenarios and personalized driving needs. It can not only automatically optimize the shifting logic, but also work closely with the engine control module to achieve more precise acceleration and braking control, significantly improving the vehicle's handling and stability.

[0031] The TCU is the core control unit of the AMT system. It is responsible for receiving signals from various sensors on the vehicle (such as vehicle speed, throttle position, brake signals, etc.), and controls the AMT's shifting process based on these signals and the preset shifting logic. The TCU is also responsible for monitoring the status of the AMT system and performing fault diagnosis and alarm when necessary.

[0032] The intermediate shaft brake is an important component in the AMT gearbox. It is located near the intermediate shaft of the gearbox and mainly realizes specific shift control functions by braking the intermediate shaft.

[0033] Function: Realize fast gear shifting: During the gear shifting process, when the gear needs to be switched, the intermediate shaft brake can quickly brake the intermediate shaft. For example, when shifting from a low gear to a high gear, by braking the intermediate shaft, the power transmission of the intermediate shaft can be quickly interrupted, so that the synchronizer can perform synchronous operation more efficiently, thereby achieving fast and accurate gear shifting. This helps to reduce the gear shifting time and improve the gear shifting efficiency.

[0034] Improve shifting smoothness: It can accurately control the speed change of the intermediate shaft. When shifting, the intermediate shaft is braked properly to make the speed of the gears of the two gears to be engaged more matched. This can reduce the shifting shock caused by the speed difference, make the shifting process smoother, and improve the driving comfort of the vehicle.

[0035] Structure and PrincipleStructural FeaturesBrake disc and brake pad: The intermediate shaft brake usually includes a brake disc and a brake pad. The brake disc is connected to the intermediate shaft or is part of the intermediate shaft, and the brake pad is mounted on a fixed bracket. The brake pad can be made of friction material, similar to the brake pad in the car brake system.

[0036] Actuator: There is a corresponding actuator to control the contact and separation of the brake pad and the brake disc. This actuator is usually driven by a hydraulic or electric system. For example, in a hydraulically driven intermediate shaft brake, there are hydraulic cylinders, pistons and other components. When the pressure oil in the hydraulic system pushes the piston, the piston drives the brake pad to move toward the brake disc, thereby achieving the braking function.

[0037] The working principle is based on friction braking: when the intermediate shaft needs to be braked, the actuator presses the brake pad tightly against the brake disc. Due to the friction between the brake pad and the brake disc, the rotation of the intermediate shaft is hindered and the speed begins to drop. The magnitude of this friction depends on the pressure of the brake pad on the brake disc and the friction coefficient between the two. The electronic control unit (ECU) accurately controls the pressure applied by the actuator according to the operating status of the vehicle (such as vehicle speed, engine speed, gear position, etc.), thereby achieving precise control of the degree of braking of the intermediate shaft.

[0038] It should be noted that the integrated AMT cancels the synchronizer of the main gearbox and adds an intermediate shaft brake. When the AMT needs to shift up, the intermediate shaft brake is used to brake the main gearbox until the speed of one shaft drops to the target value. The intermediate shaft brake is installed at the front end of the intermediate shaft. The structure is similar to the wet clutch. It creates axial pressure through the cylinder to form friction resistance. Performance depends on friction performance and lubrication effect. Figure 1 As shown, it can be seen that the intermediate shaft brake is installed at the end of the lubrication system, and the lubricating oil pressure and oil volume cannot be effectively guaranteed. This embodiment provides an active lubrication control device for the intermediate shaft brake. It can ensure that the intermediate shaft and the intermediate shaft brake are fully lubricated without affecting the gearbox lubrication system.

[0039] In order to understand the content of the present invention in more detail, the following introduces the structure of the AMT lubrication system in the prior art, as well as the content of improvement based on the prior art. The existing technical solution is to open an oil guide hole in the front housing of the gearbox to introduce the lubricating oil after lubricating the front bearing of the first shaft into the intermediate shaft brake. It can be seen from the lubricating oil circuit that the lubricating oil from the oil pump is respectively lubricated to the oil pipe of the first shaft and the rear auxiliary through the oil separator ring, and the entire lubrication system is not closed. For example, after the needle bearings of each gear position of the main box are lubricated, the lubricating oil directly flows back to the middle housing oil pool. Although this method can play a certain lubricating role on the intermediate shaft brake, because the oil guide hole is located at the end of the lubrication system, the oil volume is small, and the lubrication effect on the intermediate shaft brake is poor.

[0040] The present invention is an improvement on the prior art. Figure 2 As shown, the oil circuit at the oil distributor ring is expanded from 2 to 3, and the solenoid valve and intermediate shaft brake lubrication oil channel are installed after the oil filter. The aperture of the oil channel can be determined based on the theoretical calculation of the required lubricating oil volume. It is directly connected to the intermediate shaft brake through an oil pipe. The working condition is identified on the TCU control to determine whether the intermediate shaft brake solenoid valve needs to be opened.

[0041] Specifically, the present invention provides an intermediate shaft brake active lubrication control device, method and vehicle, which are described below respectively.

[0042] Figure 3 A schematic flow chart of an embodiment of the active lubrication control device for the intermediate shaft brake provided by the present invention is shown in FIG. Figure 3 As shown, the intermediate shaft brake active lubrication control device 300 includes: The automatic transmission control unit 301 is used to generate a lubrication control instruction when determining that the vehicle needs to shift up, and send the lubrication control instruction; A switching device 302, which is in communication with the automatic transmission control unit and is used to switch the valve inside the switching device from a closed state to an open state after receiving the lubrication control instruction; The intermediate shaft brake lubricating oil pipe 303 is connected to the switching device through a pipeline, and is used to input lubricating oil into the intermediate shaft brake when the valve inside the switching device is in an open state.

[0043] Compared with the prior art, the present embodiment provides an active lubrication control device, method and vehicle for an intermediate shaft brake, the device comprising an automatic transmission control unit, a switching device and an intermediate shaft brake lubricating oil pipe, the automatic transmission control unit is used to generate a lubrication control instruction when determining that the vehicle needs to shift up, and send the lubrication control instruction, the switching device is connected to the automatic transmission control unit in communication, and is used to switch the valve inside the switching device from a closed state to an open state after receiving the lubrication control instruction, so that the automatic transmission control unit controls the intermediate shaft brake to open the switching device when it is working, and close the switching device when the intermediate shaft brake is not working, so as to ensure that the intermediate shaft brake is fully lubricated when working, and the intermediate shaft brake lubricating oil pipe is connected to the switching device through a pipeline, and is used to input lubricating oil into the intermediate shaft brake when the valve inside the switching device is in an open state. The present invention controls the intermediate shaft brake to open the switching device when it is working during the shift-up gap through the automatic transmission control unit, and close the switching device when the intermediate shaft brake is not working after the shift-up is completed, so as to ensure that the intermediate shaft brake is fully lubricated when working. This design can achieve full lubrication of the intermediate shaft brake without affecting the lubrication of other parts of the gearbox.

[0044] It should be noted that the device of the present invention is suitable for vehicles with mechanical automatic transmissions.

[0045] The working principle of the present invention is: the automatic transmission control unit keeps the intermediate shaft brake lubrication solenoid valve closed, the automatic transmission control unit compares the current gear position with the target gear position to determine whether it is an upshift, when it is determined to be an upshift, the automatic transmission control unit controls the clutch to separate and controls the intermediate shaft brake lubrication solenoid valve to open for lubrication, the automatic transmission control unit enters the gear shifting sequence, the intermediate shaft brake is braked according to the gear shifting sequence, after the braking is completed, the automatic transmission control unit controls the intermediate shaft brake solenoid valve to close.

[0046] In some embodiments of the present invention, the automatic transmission control unit 301 is used to obtain the current gear position and the target gear position of the vehicle, and determine whether the vehicle needs to shift up based on the current gear position and the target gear position.

[0047] In some embodiments of the present invention, the automatic transmission control unit 301 is used to obtain the current gear position and the target gear position of the vehicle, and when it is determined that the current gear position is smaller than the target gear position, it is determined that the vehicle needs to shift up.

[0048] In some embodiments of the present invention, when the automatic transmission control unit 301 determines that the vehicle does not need to shift up, it sends a power-off control command to the valve of the intermediate shaft brake and simultaneously sends a closing control signal to the switching device; The switching device 302 receives the closing control signal to control the internal valve to switch from an open state to a closed state, thereby blocking the lubricating oil from being input into the intermediate shaft brake through the intermediate shaft brake lubricating oil pipe.

[0049] In some embodiments of the present invention, the switching device is also connected to an oil supply component.

[0050] In some embodiments of the present invention, the diameter of the intermediate shaft brake lubricating oil pipe is determined according to the amount of lubricating oil.

[0051] In a second aspect, the present invention further provides an intermediate shaft brake active lubrication control method, the intermediate shaft brake active lubrication control method is based on the intermediate shaft brake active lubrication control device described in any one of the above implementations, the method comprising: When the vehicle needs to shift up a gear, the automatic transmission control unit generates a lubrication control instruction and sends it to the switching device to control the valve inside the switching device to switch from a closed state to an open state, so that when the valve inside the switching device is in the open state, the intermediate shaft brake lubrication oil pipe inputs lubricating oil to the intermediate shaft brake.

[0052] In some embodiments of the present invention, the automatic transmission control unit generates a lubrication control instruction and sends it to the switching device when the vehicle needs to shift up, including: The automatic transmission control unit determines that the current gear is less than the target gear and determines that an upshift is required; When determining that the vehicle is shifting up, the automatic transmission control unit generates a lubrication control instruction and sends it to the switching device.

[0053] In some embodiments of the present invention, it further includes: When the automatic transmission control unit determines that the vehicle does not need to shift up, it sends a power-off control command to the valve of the intermediate shaft brake to control the intermediate shaft brake to stop working, and at the same time sends a closing control signal to the switching device to control the valve inside the switching device to switch from an open state to a closed state, thereby blocking the lubricating oil from being input into the intermediate shaft brake through the intermediate shaft brake lubricating oil pipe.

[0054] In some embodiments of the present invention, when the automatic transmission control unit determines that the vehicle does not need to shift up, the process includes: The automatic transmission control unit determines that the current gear is not less than the target gear and determines that the vehicle does not need to shift up.

[0055] In a specific embodiment of the present invention, a method for active lubrication control of an intermediate shaft brake comprises the following steps: Step 1: The initial state switching device is in the closed state, but after the vehicle is started, the vehicle's clutch starts to work, and the automatic transmission control unit compares the current gear position with the target gear position to determine whether an upshift is required; Step 2: When the automatic transmission control unit determines that upshifting is required, the automatic transmission control unit controls the clutch to disengage and sends an opening control signal to the solenoid valve, and the switching device receives the opening control signal and opens the switching device valve; when the automatic transmission control unit determines that upshifting is not required, the automatic transmission control unit sends a closing control signal to the switching device, and the switching device receives the closing control signal and closes the switching device valve; Step 4: The automatic transmission control unit controls the intermediate shaft brake to work according to the normal shifting sequence, and the automatic transmission control unit determines whether the intermediate shaft brake has completed the work; Step 5: When the automatic transmission control unit determines that the intermediate shaft brake has completed its operation, the automatic transmission control unit sends a closing control signal to the switching device, and the switching device receives the closing control signal and closes the switching device valve; when the automatic transmission control unit determines that the intermediate shaft brake has not completed its operation, the switching device valve is in an open state.

[0056] In a third aspect, the present invention further provides a vehicle, the vehicle comprising any one of the above-mentioned active lubrication control devices for intermediate shaft brakes, and the transmission of the vehicle is an AMT.

[0057] In summary, the active lubrication control device for the intermediate shaft brake provided by the present invention provides a special lubrication oil circuit for the intermediate shaft brake. Through the control of the solenoid valve, the intermediate shaft brake can be fully lubricated without affecting the gearbox lubrication system. According to the working condition judgment, the solenoid valve is opened for lubrication before the intermediate shaft brake is braked to ensure the braking effect. When the intermediate shaft brake is not needed to work, the solenoid valve is disconnected without affecting the lubrication of other parts of the gearbox. When the intermediate shaft brake is working, the gearbox is in neutral and does not transmit torque. The shaft teeth have no load and do not need a lot of lubrication. At this time, most of the lubricating oil will enter the intermediate shaft brake through the intermediate shaft brake oil pipe for lubrication.

[0058] Those skilled in the art will appreciate that all or part of the processes of the above-mentioned embodiments can be implemented by instructing related hardware through a computer program, and the program can be stored in a computer-readable storage medium, wherein the computer-readable storage medium is a disk, an optical disk, a read-only storage memory, or a random access memory, etc.

[0059] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. An active lubrication control device for an intermediate shaft brake, characterized in that: include: An automatic transmission control unit, for generating a lubrication control instruction when determining that the vehicle needs to shift up, and sending the lubrication control instruction; A switching device, connected in communication with the automatic transmission control unit, for switching the valve inside the switching device from a closed state to an open state after receiving the lubrication control instruction; The intermediate shaft brake lubricating oil pipe is connected to the switching device through a pipeline, and is used to input lubricating oil into the intermediate shaft brake when the valve inside the switching device is in an open state.

2. The active lubrication control device for the intermediate shaft brake according to claim 1, characterized in that: The automatic transmission control unit is used to obtain the current gear position and the target gear position of the vehicle, and determine whether the vehicle needs to shift up based on the current gear position and the target gear position.

3. The active lubrication control device for the intermediate shaft brake according to claim 2, characterized in that: The automatic transmission control unit is used to obtain the current gear position and the target gear position of the vehicle, and when it is determined that the current gear position is smaller than the target gear position, it is determined that the vehicle needs to shift up.

4. The active lubrication control device for the intermediate shaft brake according to claim 1, characterized in that: When the automatic transmission control unit determines that the vehicle does not need to shift up, it sends a power-off control command to the valve of the intermediate shaft brake and simultaneously sends a closing control signal to the switching device; The switching device receives the closing control signal to control the internal valve to switch from an open state to a closed state, thereby blocking the lubricating oil from being input into the intermediate shaft brake through the intermediate shaft brake lubricating oil pipe.

5. The active lubrication control device for intermediate shaft brake according to claim 1, characterized in that: The switching device is also connected to the oil supply component.

6. An active lubrication control method for an intermediate shaft brake, characterized in that: The intermediate shaft brake active lubrication control method is based on the intermediate shaft brake active lubrication control method device according to any one of claims 1 to 5, and the method comprises: When the vehicle needs to shift up a gear, the automatic transmission control unit generates a lubrication control instruction and sends it to the switching device to control the valve inside the switching device to switch from a closed state to an open state, so that when the valve inside the switching device is in the open state, the intermediate shaft brake lubrication oil pipe inputs lubricating oil to the intermediate shaft brake.

7. The active lubrication control method for the intermediate shaft brake according to claim 6, characterized in that: The automatic transmission control unit generates a lubrication control instruction and sends it to the switching device when the vehicle needs to shift up, including: The automatic transmission control unit determines that the current gear is less than the target gear and determines that an upshift is required; When determining that the vehicle is shifting up, the automatic transmission control unit generates a lubrication control instruction and sends it to the switching device.

8. The active lubrication control method for the intermediate shaft brake according to claim 6, characterized in that: Also includes: When the automatic transmission control unit determines that the vehicle does not need to shift up, it sends a power-off control command to the valve of the intermediate shaft brake to control the intermediate shaft brake to stop working, and at the same time sends a closing control signal to the switching device to control the valve inside the switching device to switch from an open state to a closed state, thereby blocking the lubricating oil from being input into the intermediate shaft brake through the intermediate shaft brake lubricating oil pipe.

9. The active lubrication control method for the intermediate shaft brake according to claim 6, characterized in that: When the automatic transmission control unit determines that the vehicle does not need to shift up, the method includes: The automatic transmission control unit determines that the current gear is not less than the target gear and determines that the vehicle does not need to shift up.

10. A vehicle, characterized in that: The vehicle comprises an intermediate shaft brake active lubrication control device as claimed in any one of claims 1-5.

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