Control method and control device of synchronizer lubrication system, and synchronizer lubrication system

Abstract

The present invention discloses a control method, a control device and a synchronizer lubrication system for a synchronizer lubrication system. Among them, the control method includes: collecting a shift displacement amount sensed by a sensor that the shift fork moves along the axial direction of the gear shaft during the shifting process; determining whether the shift displacement amount meets a first preset condition; in the case where the first preset condition is met, generating a control strategy set, and the control strategy set is used to control the hydraulic system to apply an oil volume of lubricating oil meeting a preset value into the oil passage of the shift fork. The present invention solves the technical problem that the oil volume of the lubricating oil is uncontrollable when lubricating the synchronizer.

Description

Technical Field

[0001] The present invention relates to the technical field of lubrication system control, and in particular, to a control method, a control device, and a synchronizer lubrication system for a synchronizer lubrication system. Background Art

[0002] As a core subsystem of a transmission, a synchronizer uses the friction principle to achieve gear speed synchronization during transmission shifting, ensuring structurally that the gear sleeve to be engaged and the engaging teeth cannot come into contact before reaching synchronization, avoiding tooth impact and noise, and thus achieving rapid and smooth shifting of the transmission. According to the movement process of the synchronizer gear sleeve, the shifting process can be divided into 7 stages: free coasting before pre-synchronization, pre-synchronization, synchronization, synchronous unlocking, free coasting after synchronization, aligning the engaging teeth, and full engagement.

[0003] A large amount of heat is generated during the shifting process of the synchronizer, and a lubrication system is required for close lubrication. Moreover, during each stage of the shifting process, the sliding friction work generated by the friction between the conical surfaces of the synchronizer ring and the engaging teeth is different. More lubricating oil is required during the synchronization process, less lubricating oil is required at the neutral position and the synchronization completion position, and no lubricating oil is required after the shifting is completed.

[0004] Currently, there are mainly two types of lubrication devices for synchronizers. The first solution is to use a spray pipe for active lubrication of the synchronizer. The second solution is to use an oil collector to collect the lubricating oil splashed by the gears, and then drip the lubricating oil into the synchronizer through an opening at the bottom of the oil collector. Their common feature is that the lubricating oil sprayed by the spray pipe or dripped by the oil collector is easily blocked by the synchronizer gear sleeve or the shift fork, resulting in poor lubrication effect. In addition, in the spray pipe spraying method, the lubricating oil lubricates both the gears and the synchronizer simultaneously, so precise control of the lubricating oil volume during the shifting process cannot be achieved, and the lubricating oil volume is completely uncontrollable in the dripping method.

[0005] In view of the above problems, no effective solution has been proposed yet. Summary of the Invention

[0006] Embodiments of the present invention provide a control method, a control device, and a synchronizer lubrication system for a synchronizer lubrication system, so as to at least solve the technical problem of uncontrollable lubricating oil volume when lubricating a synchronizer.

[0007] According to one aspect of the embodiments of the present invention, a control method for a synchronizer lubrication system is provided, including: collecting a shifting displacement amount sensed by a sensor when a shift fork moves axially along a gear shaft during a shifting process; determining whether the shifting displacement amount meets a first preset condition; and generating a control strategy set in the case of meeting the first preset condition, where the control strategy set is used to control a hydraulic system to apply a lubricating oil volume meeting a preset value into an oil passage of the shift fork.

[0008] Optionally, it is determined whether the shift displacement meets a first preset condition. When the first preset condition is met, a control strategy set is generated. The control strategy set is used to control the hydraulic system to apply a lubricating oil amount meeting a preset value to the oil passage of the shift fork, including: determining a target displacement interval matching the shift displacement according to the shift displacement, where the target displacement interval includes at least one of the following: a displacement interval formed by the distance from the neutral position to the pre-synchronization position, a displacement interval formed by the distance from the pre-synchronization position interval to the synchronization position, a displacement interval formed by the distance from the synchronization position to the synchronization completion position, a displacement interval formed by the distance from the synchronization completion position to the start engagement position, a displacement interval formed by the distance from the start engagement position to the completion engagement position, and a displacement interval formed by the distance from the completion engagement position to the fully engaged position; generating a corresponding first target strategy in the control strategy set based on the target displacement interval, where the first target strategy is used to control the hydraulic system to apply a lubricating oil amount matching the current target displacement interval to the oil passage of the shift fork.

[0009] Optionally, the method includes: when it is determined that the target displacement interval matching the shift displacement is a displacement interval formed by the distance from the synchronization position to the synchronization completion position, collecting the gear position oil pressure sensed by a pressure sensor; determining whether the gear position oil pressure meets a second preset condition, and when the gear position oil pressure meets the second preset condition, generating a first target strategy.

[0010] Optionally, determining whether the gear position oil pressure meets a second preset condition, and when the gear position oil pressure meets the second preset condition, generating a first target strategy, includes: collecting the rotational speed difference between the driving side and the driven side of the synchronizer sensed by a rotational speed sensor; multiplying the rotational speed difference by the gear position oil pressure, and when the product of the rotational speed difference and the gear position oil pressure meets the second preset condition, generating a first target strategy.

[0011] Optionally, the method further includes: comparing the product of the rotational speed difference and the gear position oil pressure with a sliding friction power level to obtain a comparison result; when the comparison result meets a third preset condition, generating a first target strategy.

[0012] Optionally, the method includes: when it is determined that the shift displacement is the same as the distance from the neutral position to the fully engaged position, generating a corresponding second target strategy in the control strategy set, where the second target strategy is used to control the hydraulic system to stop supplying oil to the oil passage of the shift fork.

[0013] According to another aspect of the embodiments of the present invention, a synchronizer lubrication device is further provided, including: an acquisition unit for acquiring the shift displacement amount sensed by a sensor when the shift fork moves in the axial direction of the gear shaft during a shift; a judgment unit for judging whether the shift displacement amount meets a first preset condition; a generation unit for generating a control strategy set when the first preset condition is met, and the control strategy set is used to control the hydraulic system to apply an oil amount of lubricating oil meeting a preset value into the oil passage of the shift fork.

[0014] According to another aspect of the embodiments of the present invention, a synchronizer lubrication system is further provided. The synchronizer lubrication system includes a fork shaft, independent oil supply channels are respectively arranged at both ends of the fork shaft, opposite shift forks are arranged on the fork shaft, a plurality of oil injection channels are formed in each shift fork, the plurality of oil injection channels are arranged at intervals in the axial direction of the fork shaft, and at least one of the plurality of oil injection channels is communicated with the oil supply channel at one end of the fork shaft, and the remaining oil injection channels are communicated with the oil supply channel at the other end of the fork shaft. The synchronizer lubrication system is controlled to supply oil by using the above control method.

[0015] According to another aspect of the embodiments of the present invention, a computer-readable storage medium is further provided. The computer-readable storage medium includes a stored program, wherein the computer program is set to control the execution of the above control method when running.

[0016] According to another aspect of the embodiments of the present invention, a processor is further provided. The processor is used to run a program, wherein the processor executes the above control method through the computer program.

[0017] In the embodiments of the present invention, by acquiring the shift displacement amount sensed by a sensor when the shift fork moves in the axial direction of the gear shaft during a shift, then judging whether the shift displacement amount meets the first preset condition, and generating a control strategy set when the first preset condition is met, and the control strategy set is used to control the hydraulic system to apply an oil amount of lubricating oil meeting a preset value into the oil passage of the shift fork, the purpose of precisely controlling the lubricating oil amount of the synchronizer in each stage during the shift process is achieved, and further the technical problem of uncontrollable lubricating oil amount when lubricating the synchronizer is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present invention, form a part of this application, and the schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0019] Figure 1 is a schematic flowchart of a control method for an optional synchronizer lubrication system according to an embodiment of the present invention;

[0020] Figure 2Schematic diagram of the structure of the first embodiment of a synchronizer lubrication system according to the present invention;

[0021] Figure 3 Schematic diagram of the structure of the second embodiment of a synchronizer lubrication system according to the present invention;

[0022] Figure 4 Schematic diagram of the structure of the third embodiment of a synchronizer lubrication system according to the present invention;

[0023] Figure 5 Relationship curve diagram between the target displacement interval and the oil volume of the lubricating oil according to the embodiments of the present invention;

[0024] Figure 6 Flow schematic diagram of a control method for an optional synchronizer lubrication system according to another embodiment of the present invention;

[0025] Figure 7 Structure block diagram of an optional device according to the embodiments of the present invention.

[0026] Among them, the above-mentioned drawings include the following reference numerals:

[0027] 100, cylinder liner assembly; 101, first cylinder liner; 101a, first cylinder liner oil passage; 102, second cylinder liner; 102a, second cylinder liner oil passage;

[0028] 200, housing assembly; 201, first support sleeve; 201a, first support sleeve oil passage; 203, fork shaft seal ring; 202, second support sleeve; 202a, second support sleeve oil passage;

[0029] 300, piston assembly; 301, piston; 302, piston seal ring;

[0030] 400, shift fork assembly; 401, shift fork; 401a, first oil injection passage; 401b, second oil injection passage; 402, shift fork seal ring; 403, bushing; 404, position sensor magnet;

[0031] 500, shaft string assembly; 501, gear sleeve; 502, synchronizer ring; 503, engaging teeth; 504, gear; 505, shaft;

[0032] 601, fork shaft; 601a, first oil supply passage; 601b, second oil supply passage. Detailed implementation manners

[0033] To enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0034] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present invention described here can be implemented in an order different from those illustrated or described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0035] According to an embodiment of the present invention, a method embodiment of a control method for a synchronizer lubrication system is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. And although the logical order is shown in the flowchart, in some cases, the steps shown or described here can be executed in an order different from that here.

[0036] Figure 1 is a control method for a synchronizer lubrication system according to an embodiment of the present invention, as Figure 1 shown, the method includes the following steps:

[0037] Step S102, collect the shift displacement amount sensed by the sensor and moving along the axial direction of the gear shaft during the shifting process;

[0038] Step S104, determine whether the shift displacement amount meets the first preset condition;

[0039] Step S106, when the first preset condition is met, generate a control strategy set for controlling the hydraulic system to apply an oil volume of lubricating oil meeting a preset value into the oil passage of the shift fork.

[0040] By collecting the shift displacement amount sensed by the sensor when the shift fork moves along the axial direction of the gear shaft during the shifting process, and then determining whether the shift displacement amount meets the first preset condition. When the first preset condition is met, a control strategy set is generated. The control strategy set is used to control the hydraulic system to apply the lubricating oil amount meeting the preset value into the oil passage of the shift fork, achieving the purpose of precisely controlling the lubricating oil amount of the synchronizer in each stage during the shifting process, and thus solving the technical problem of uncontrollable lubricating oil amount when lubricating the synchronizer.

[0041] Optionally, determining whether the shift displacement amount meets the first preset condition, and when the first preset condition is met, generating a control strategy set. The control strategy set is used to control the hydraulic system to apply the lubricating oil amount meeting the preset value into the oil passage of the shift fork, including: according to the shift displacement amount, determining the target displacement interval matching the shift displacement amount, where the target displacement interval includes at least one of the following: the displacement interval formed by the distance from the neutral position to the pre-synchronization position, the displacement interval formed by the distance from the pre-synchronization position interval to the synchronization position, the displacement interval formed by the distance from the synchronization position to the synchronization completion position, the displacement interval formed by the distance from the synchronization completion position to the start engagement position, the displacement interval formed by the distance from the start engagement position to the completion engagement position, the displacement interval formed by the distance from the completion engagement position to the full gear engagement position; based on the target displacement interval, generating the corresponding first target strategy in the control strategy set, and the first target strategy is used to control the hydraulic system to apply the lubricating oil amount matching the current target displacement interval into the oil passage of the shift fork. As Figure 5 shown, the shift displacement amount at the neutral position is set to 0, and the shift displacement amount at the pre-synchronization position is set to X 1 , the shift displacement amount at the synchronization position is set to X 2 , the shift displacement amount at the synchronization completion position is set to X 3 , the shift displacement amount at the start engagement position (corresponding to Figure 5 the start engaging engaging teeth in 4 ) is set to X Figure 5 , the shift displacement amount at the completion engagement position (corresponding to 5 the completion engaging engaging teeth in 6 ) is set to X 1 , and the shift displacement amount at the full gear engagement position is set to X 1 . When the target displacement interval matched by the shift displacement amount is 0 to X 1 , control the hydraulic system to apply the lubricating oil amount with a preset value of Q 2 into the oil passage of the shift fork. When the target displacement interval matched by the shift displacement amount is X 2The lubricating oil quantity, when the target displacement range matched by the shift displacement is X 2 ~X 3 When it is, control the hydraulic system to apply a lubricating oil quantity with a preset value of Q n The lubricating oil quantity, when the target displacement range matched by the shift displacement is X 3 ~X 6 When it is, control the hydraulic system to apply a lubricating oil quantity with a preset value of Q 1 The lubricating oil quantity. In this embodiment, it is possible to correspondingly allocate the lubricating oil quantity required by the synchronizer according to the stage in which the synchronizer is in the shifting process, further achieving the purpose of precisely controlling the lubricating oil quantity of the synchronizer in each stage during the shifting process, and solving the problem that the lubricating oil quantity is uncontrollable when lubricating the synchronizer. Among them, the first preset condition is set such that the shift displacement can match one of the above target displacement ranges.

[0042] Optionally, the method includes: when it is determined that the target displacement range matched by the shift displacement is the displacement range formed by the distance from the synchronization position to the synchronization completion position, collect the gear position oil pressure sensed by the pressure sensor, determine whether the gear position oil pressure meets the second preset condition, and generate a first target strategy when the gear position oil pressure meets the second preset condition. In this embodiment, when the synchronizer is in the synchronization stage, a large amount of sliding friction work will be generated, and the lubricating oil quantity should not be given a fixed value at this time, but should be gradually changed according to the size of the sliding friction power. At this time, by collecting the gear position oil pressure and generating a first target strategy when the gear position oil pressure meets the second preset condition, the lubricating oil quantity when the synchronizer is in the synchronization stage can be precisely controlled. Among them, the second preset condition can be set such that the gear position oil pressure is within a certain range, and this range is determined according to the empirical data when the synchronizer is in the synchronization stage.

[0043] Optionally, determining whether the gear position oil pressure meets the second preset condition and generating a first target strategy when the gear position oil pressure meets the second preset condition includes: collecting the rotational speed difference between the driving side and the driven side of the synchronizer sensed by the rotational speed sensor, multiplying the rotational speed difference by the gear position oil pressure, and generating a first target strategy when the product of the rotational speed difference and the gear position oil pressure meets the second preset condition. In this way, the lubricating oil quantity when the synchronizer is in the synchronization stage can be further precisely controlled.

[0044] Optionally, the method further includes: comparing the product of the rotational speed difference and the gear position oil pressure with the sliding friction power level to obtain a comparison result, and generating a first target strategy when the comparison result meets the third preset condition. Let the rotational speed difference be Δω and the gear position oil pressure be P. As Figure 6 shown, the third preset condition is T n ≤P·Δω<T n+1, when the third preset condition is satisfied, the TCU controls the hydraulic system to apply the synchronizer lubricating oil quantity Q to the shift fork oil passage n . In this way, the technical effect of gradually changing the lubricating oil quantity according to the magnitude of the sliding friction power is achieved, and then the corresponding lubricating oil quantity Q is allocated to the synchronizer n , achieving the purpose of precisely controlling the lubricating oil quantity when the synchronizer is in the synchronization stage.

[0045] Optionally, the method includes: when it is determined that the shift displacement is the same as the distance from the neutral position to the fully engaged position, generating the corresponding second target strategy in the control strategy set, and the second target strategy is used to control the hydraulic system to stop supplying oil to the oil passage of the shift fork. In this embodiment, the synchronizer is in the end stage of shifting, so there is no need to lubricate the synchronizer.

[0046] As Figure 6 shown is a schematic flow chart of a control method for an optional synchronizer lubrication system according to another embodiment of the present invention. First, the TCU controls the hydraulic system to apply the shift oil pressure to the piston chamber. When shifting starts, the shift fork displacement X (i.e., the shift displacement in the above embodiment) is detected by the shift fork position sensor. When it is detected that the shift fork displacement X satisfies 0 ≤ X ≤ X 1 , the TCU controls the hydraulic system to apply the synchronizer lubricating oil quantity Q to the shift fork oil passage 1 . When it is detected that the shift fork displacement X satisfies X 1 ≤ X ≤ X 2 , the TCU controls the hydraulic system to apply the synchronizer lubricating oil quantity Q to the shift fork oil passage 2 . When it is detected that the shift fork displacement X satisfies X 2 ≤ X ≤ X 3 , then the pressure sensor is required to detect the shift oil pressure P, and at the same time the rotational speed sensor detects the rotational speed difference Δω between the main and driven sides of the synchronizer (i.e., the rotational speed difference Δω in the above embodiment). The product of the shift oil pressure and the rotational speed difference Δω between the main and driven sides of the synchronizer is compared with the sliding friction power level T. If T n ≤ P·Δω < T n+1 , the TCU controls the hydraulic system to apply the synchronizer lubricating oil quantity Q to the shift fork oil passage n . When the shift fork displacement X = X 6 , the synchronizer is in the fully engaged position. At this time, the TCU controls the hydraulic system to cut off the lubricating oil supply to the shift fork oil passage. In this way, the technical effect of quantitatively injecting oil according to different positions of the synchronizer during shifting is achieved.

[0047] According to another specific embodiment of the present application, a synchronizer lubrication device is further provided, as Figure 7As shown in the figure, the device includes: a collection unit 42, a judgment unit 44, and a generation unit 46. The collection unit 42 is used to collect the shift displacement amount sensed by the sensor when the shift fork moves in the axial direction of the gear shaft during the shifting process. The judgment unit 44 is used to judge whether the shift displacement amount meets the first preset condition. The generation unit 46 is used to generate a control strategy set when the first preset condition is met. The control strategy set is used to control the hydraulic system to apply an oil volume of lubricating oil that meets the preset value into the oil passage of the shift fork.

[0048] In this embodiment, by collecting the shift displacement amount sensed by the sensor when the shift fork moves in the axial direction of the gear shaft during the shifting process, then judging whether the shift displacement amount meets the first preset condition, and generating a control strategy set when the first preset condition is met, the control strategy set is used to control the hydraulic system to apply an oil volume of lubricating oil that meets the preset value into the oil passage of the shift fork, achieving the purpose of precisely controlling the lubricating oil volume of the synchronizer at each stage during the shifting process, and further solving the technical problem of uncontrollable lubricating oil volume when lubricating the synchronizer.

[0049] As Figures 2 to 4 shown, according to another specific embodiment of the present application, a synchronizer lubrication system is further provided. The synchronizer lubrication system includes a fork shaft 601. Independent oil supply channels are respectively arranged at both ends of the fork shaft 601, namely a first oil supply channel 601a and a second oil supply channel 601b. Opposite shift forks 401 are arranged on the fork shaft 601. A plurality of oil injection channels are opened in each shift fork 401, namely a first oil injection channel 401a and a second oil injection channel 401b. The plurality of oil injection channels are arranged at intervals in the axial direction of the fork shaft 601, and at least one of the plurality of oil injection channels is communicated with the oil supply channel at one end of the fork shaft 601, and the remaining oil injection channels are communicated with the oil supply channel at the other end of the fork shaft 601. Specifically, the first oil injection channel 401a is communicated with the first oil supply channel 601a, and the second oil injection channel 401b is communicated with the second oil supply channel 601b. The synchronizer lubrication system is controlled to supply oil by using the control method in the above embodiment. By opening a plurality of oil injection channels in the shift fork 401, filling the plurality of oil injection channels in the shift fork 401 with oil through the hydraulic system, and then spraying oil to the synchronizer through the plurality of oil injection channels in the shift fork 401, thereby lubricating the synchronizer, the problem that the lubricating oil is easily blocked by the synchronizer gear sleeve or the shift fork during the lubrication of the synchronizer in the prior art, resulting in poor lubrication effect, is solved.

[0050] Specifically, as Figure 2 shown, the synchronizer lubrication system is composed of a cylinder liner assembly 100, a housing assembly 200, a piston assembly 300, a shift fork assembly 400, a shaft string assembly 500, a fork shaft 601, and a shift fork position sensor, a shift pressure sensor, a rotational speed sensor, and a lubricating flow control system. As Figure 4As shown, the cylinder liner assembly 100 includes a first cylinder liner 101, a first cylinder liner oil passage 101a, a second cylinder liner 102, and a second cylinder liner oil passage 102a. The shift pressure sensor can detect the shift pressures of the first cylinder liner oil passage 101a and the second cylinder liner oil passage 102a. The housing assembly 200 includes a first support sleeve 201, a first support sleeve oil passage 201a, a shift shaft seal ring 203, a second support sleeve 202, and a second support sleeve oil passage 202a. The shift shaft seal ring 203 is respectively installed in the grooves of the first support sleeve 201 and the second support sleeve 202. The left and right ends of the shift shaft 601 are limited by the first support sleeve 201 and the second support sleeve 202. The first support sleeve oil passage 201a and the second support sleeve oil passage 202a are connected by a hydraulic system. The piston assembly 300 includes a piston 301 and a piston seal ring 302. The piston seal ring 302 is respectively installed in the grooves on both sides of the piston 301. The piston assembly 300 can reciprocate in the first cylinder liner 101 and the second cylinder liner 102. The shift fork assembly 400 includes a shift fork 401, a first oil injection passage 401a, a second oil injection passage 401b, a shift fork seal ring 402, a bushing 403, and a position sensor magnet 404. The shift fork seal ring 402 is respectively installed on the left, middle, and right sides of the sleeve of the shift fork 401. The bushings 403 are respectively press-fitted at the left and right ends of the sleeve of the shift fork 401. The first oil injection passage 401a and the second oil injection passage 401b are respectively connected to the first support sleeve oil passage 201a and the second support sleeve oil passage 202a through the sealed area formed between the shift fork 401 and the shift shaft 601. When the synchronizer shifts gears to both sides respectively, the corresponding oil passages are filled with oil through the hydraulic system, thereby lubricating the synchronizer. The piston assembly 300 drives the shift fork assembly 400 to move, thereby pushing the gear sleeve 501 to shift gears. The position sensor magnet 404 is screwed on the shift fork 401. The shift fork position sensor detects the position of the shift fork through the position sensor magnet 404, thereby determining the shift displacement of the shift fork. The shaft assembly 500 includes a gear sleeve 501, a synchronizer ring 502, engaging teeth 503, a gear 504, and a shaft 505. The rotational speed sensors respectively detect the rotational speeds of the gear 504 and the shaft 505 and calculate the rotational speed difference. With this synchronizer lubrication system, the problem that the lubricating oil is easily blocked by the synchronizer gear sleeve or the shift fork during the lubrication of the synchronizer, resulting in poor lubrication effect of the synchronizer, is avoided.

[0051] In an exemplary embodiment, the required lubricating oil quantity is different at different shift positions of the synchronizer. By dividing the shift position points of the synchronizer into 7, as Figure 5 shown, they are respectively the 0 position (neutral position), X 1 (pre-synchronization position), X 2 (synchronization position), X 3 (unlock position, also called synchronization completion position), X 4 (starting to engage the engaging teeth position), X 5 (completing the engagement of the engaging teeth position), X6 (Fully engaged position). When the gear sleeve 501 is at the position from 0 to X 1 , there is a rotational speed difference between the synchronizer ring 502 and the engaging teeth 503. However, at this time, the synchronizer ring 502 is in a floating state and the sliding friction work is very small, so a relatively small flow rate Q is set 1 . When the gear sleeve 501 is at the position from X 1 to X 2 , the gear sleeve 501 pushes the synchronizer slider to drive the synchronizer ring 502 and the engaging teeth 503 to slide and grind, and makes the synchronizer ring 502 rotate a certain angle relative to the gear seat, and a relatively large flow rate Q is set 2 . When the gear sleeve 501 is at the position from X 2 to X 3 , the synchronizer is in the synchronization stage, and a large amount of sliding friction work will be generated. At this time, a fixed lubricating oil quantity should not be given, but the lubricating flow rate should be changed step by step according to the size of the sliding friction power. At this time, the shifting oil pressure P of the first cylinder sleeve oil passage 101a or the second cylinder sleeve oil passage 102a should be detected by the shifting pressure sensor, the rotational speeds of the gear 504 and the shaft 505 should be detected respectively by the rotational speed sensor, and the rotational speed difference Δω should be calculated. The product of P and Δω is compared with the predetermined sliding friction power level T, and then the corresponding flow rate Q is allocated n . When the gear sleeve 501 is at the position from X 3 to X 6 , there is no rotational speed difference between the synchronizer ring 502 and the engaging teeth 503. However, at this time, in order to consider taking away the synchronization heat as soon as possible, a relatively small flow rate Q is still set 1 . After the shifting is completed, the fork position sensor detects that the position sensor magnet 404 has shifted in place, and the synchronizer does not require lubricating flow rate.

[0052] In another exemplary embodiment of the present application, the control process for lubricating the synchronizer through the synchronizer lubrication system is as follows: First, the TCU controls the hydraulic system to apply a shift oil pressure to the first cylinder sleeve oil passage 101a. At this time, the shift starts. The shift oil pressure pushes the piston assembly 300 to move to the right. The piston assembly 300 drives the fork assembly 400 to move, and then drives the gear sleeve 501 to move to the right. The fork position sensor detects the fork displacement X of the fork assembly 400 (i.e., the shift displacement in the above embodiment) through the position sensor magnet 404. The TCU controls the hydraulic system to apply a corresponding lubricating oil quantity to the second support sleeve oil passage 202a. The amount of lubricating oil is related to the position X. The lubricating oil enters the closed area formed by the fork shaft 601, the fork 401, and the two fork sealing rings 402 through the first oil supply passage 601a on the fork shaft 601. Then, the lubricating oil sprays the oil onto the synchronizer ring 502 and the engaging teeth 503 through the first oil injection passage 401a on the fork 401. Since the first oil supply passage 601a is integrated on the fork 401, the first oil supply passage 601a can be close to the synchronizer ring 502 and the engaging teeth 503 that need to be lubricated in the synchronizer, avoiding too long a spraying distance or being blocked by other components, making the spraying position accurate. After the shift ends, the gear 504 and the shaft 505 rotate together. By adopting the technical solution of this embodiment, quantitative oil injection is achieved according to different positions of the synchronizer during shifting, and the problems of unsatisfactory lubrication effect and large energy loss in the existing solutions are solved.

[0053] According to another specific embodiment of the present application, a computer-readable storage medium is further provided. The computer-readable storage medium includes a stored program. When the program runs, it controls the device where the computer-readable storage medium is located to execute the steps of the control method in the above embodiment.

[0054] According to another specific embodiment of the present application, a processor is further provided. The processor is used to run a program. When the program runs, it executes the steps of the control method in the above embodiment.

[0055] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0056] In the above embodiments of the present invention, the descriptions of each embodiment have their own emphases. For the parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0057] In several embodiments provided by this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are merely illustrative. For example, the division of the units can be a logical function division. In actual implementation, there can be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed couplings or direct couplings or communication connections to each other can be through some interfaces. The indirect couplings or communication connections of units or modules can be in electrical or other forms.

[0058] The units described as separate components may or may not be physically separated. The components displayed as units may or may not be physical units, that is, they can be located in one place or distributed to multiple units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0059] In addition, in each embodiment of the present invention, the functional units can be integrated into a processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

[0060] If the above-mentioned integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in each embodiment of the present invention. The aforementioned storage medium includes: various media such as USB flash drives, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), mobile hard disks, magnetic disks, or optical discs that can store program codes.

[0061] The above is only the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A control method for a synchronizer lubrication system, characterized in that, it includes: collecting the shift displacement amount sensed by a sensor that the shift fork moves along the axial direction of the gear shaft during the shifting process; judging whether the shift displacement amount meets a first preset condition; when the first preset condition is met, generating a control strategy set for controlling the hydraulic system to apply an oil quantity of lubricating oil meeting a preset value into the oil passage of the shift fork; the control strategy set for controlling the hydraulic system to apply an oil quantity of lubricating oil meeting a preset value into the oil passage of the shift fork includes: determining a target displacement interval matching the shift displacement amount according to the shift displacement amount, where the target displacement interval includes at least one of the following: a displacement interval formed by the distance from the neutral position to the pre-synchronization position, a displacement interval formed by the distance from the pre-synchronization position interval to the synchronization position, a displacement interval formed by the distance from the synchronization position to the synchronization completion position, a displacement interval formed by the distance from the synchronization completion position to the start engagement position, a displacement interval formed by the distance from the start engagement position to the completion engagement position, a displacement interval formed by the distance from the completion engagement position to the fully engaged position; based on the target displacement interval, generating a corresponding first target strategy in the control strategy set, and the first target strategy is used to control the hydraulic system to apply an oil quantity of lubricating oil matching the current target displacement interval into the oil passage of the shift fork.

2. The control method for a synchronizer lubrication system according to claim 1, characterized in that, the method includes: when it is determined that the target displacement interval matching the shift displacement amount is a displacement interval formed by the distance from the synchronization position to the synchronization completion position, collecting the gear position oil pressure sensed by a pressure sensor; judging whether the gear position oil pressure meets a second preset condition, and when the gear position oil pressure meets the second preset condition, generating the first target strategy.

3. The control method for a synchronizer lubrication system according to claim 2, characterized in that, judging whether the gear position oil pressure meets a second preset condition, and when the gear position oil pressure meets the second preset condition, generating the first target strategy, including: collecting the rotational speed difference between the driving side and the driven side of the synchronizer sensed by a rotational speed sensor; multiplying the rotational speed difference by the gear position oil pressure, and when the product of the rotational speed difference and the gear position oil pressure meets the second preset condition, generating the first target strategy.

4. The control method for a synchronizer lubrication system according to claim 3, characterized in that, the method further includes: comparing the product of the rotational speed difference and the gear position oil pressure with the sliding friction power level to obtain a comparison result; when the comparison result meets a third preset condition, generating the first target strategy.

5. The control method for a synchronizer lubrication system according to claim 1, characterized in that, the method includes: When it is determined that the shift displacement amount is the same as the distance between the neutral position and the fully engaged position, the corresponding second target strategy in the control strategy set is generated, and the second target strategy is used to control the hydraulic system to stop supplying oil to the oil passage of the shift fork.

6. A control device for a synchronizer lubrication system, characterized in that it includes: An acquisition unit for acquiring the shift displacement amount sensed by a sensor during the shift process when the shift fork moves in the axial direction of the gear shaft; A judgment unit for judging whether the shift displacement amount meets a first preset condition; A generation unit for generating a control strategy set when the first preset condition is met, and the control strategy set is used to control the hydraulic system to apply an oil amount of lubricating oil that meets a preset value to the oil passage of the shift fork; The control strategy set for controlling the hydraulic system to apply an oil amount of lubricating oil that meets a preset value to the oil passage of the shift fork includes: determining a target displacement interval matching the shift displacement amount according to the shift displacement amount, where the target displacement interval includes at least one of the following: a displacement interval formed by the distance from the neutral position to the pre-synchronization position, a displacement interval formed by the distance from the pre-synchronization position interval to the synchronization position, a displacement interval formed by the distance from the synchronization position to the synchronization completion position, a displacement interval formed by the distance from the synchronization completion position to the start engagement position, a displacement interval formed by the distance from the start engagement position to the completion engagement position, a displacement interval formed by the distance from the completion engagement position to the fully engaged position; Based on the target displacement interval, the corresponding first target strategy in the control strategy set is generated, and the first target strategy is used to control the hydraulic system to apply an oil amount of lubricating oil matching the current target displacement interval to the oil passage of the shift fork.

7. A synchronizer lubrication system, characterized in that The synchronizer lubrication system includes a fork shaft (601) and a control device. Independent oil supply channels are respectively arranged at both ends of the fork shaft (601). Opposite shift forks (401) are arranged on the fork shaft (601). A plurality of oil injection channels are opened in each shift fork (401). The plurality of oil injection channels are arranged at intervals along the axial direction of the fork shaft (601), and at least one of the plurality of oil injection channels is communicated with the oil supply channel at one end of the fork shaft (601), and the remaining oil injection channels are communicated with the oil supply channel at the other end of the fork shaft (601). The synchronizer lubrication system controls the oil supply by using the control method according to any one of claims 1 to 5.

8. A computer-readable storage medium, characterized in that The computer-readable storage medium includes a stored program, wherein when the program runs, it controls the device where the computer-readable storage medium is located to execute the control method according to any one of claims 1 to 5.

9. A processor, characterized in that The processor is used to run a program, and when the program runs, it executes the control method according to any one of claims 1 to 5.

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