CN118009035B - Hydraulic control device for CVT (continuously variable transmission) of motorcycle - Google Patents
Hydraulic control device for CVT (continuously variable transmission) of motorcycle Download PDFInfo
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- CN118009035B CN118009035B CN202410424827.9A CN202410424827A CN118009035B CN 118009035 B CN118009035 B CN 118009035B CN 202410424827 A CN202410424827 A CN 202410424827A CN 118009035 B CN118009035 B CN 118009035B
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 35
- 238000001914 filtration Methods 0.000 claims abstract description 96
- 239000012530 fluid Substances 0.000 claims abstract description 20
- 210000001503 joint Anatomy 0.000 claims description 24
- 239000000758 substrate Substances 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 abstract description 41
- 239000011159 matrix material Substances 0.000 abstract description 8
- 239000003921 oil Substances 0.000 description 270
- 238000000034 method Methods 0.000 description 16
- 230000008569 process Effects 0.000 description 13
- 230000033001 locomotion Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 230000009471 action Effects 0.000 description 6
- 230000004044 response Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 238000007599 discharging Methods 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 238000000151 deposition Methods 0.000 description 3
- 206010023204 Joint dislocation Diseases 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 230000002427 irreversible effect Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/66—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing specially adapted for continuously variable gearings
- F16H61/662—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing specially adapted for continuously variable gearings with endless flexible members
- F16H61/66272—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing specially adapted for continuously variable gearings with endless flexible members characterised by means for controlling the torque transmitting capability of the gearing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/0401—Valve members; Fluid interconnections therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/0021—Generation or control of line pressure
- F16H61/0025—Supply of control fluid; Pumps therefore
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/25—Pressure control functions
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Fluid-Pressure Circuits (AREA)
- General Details Of Gearings (AREA)
Abstract
The invention discloses a hydraulic control device for a CVT (continuously variable transmission) of a motorcycle, which belongs to the technical field of transmissions and comprises an oil pump and a main oil way, wherein the main oil way is provided with a main regulating valve, the oil pump is matched with a filtering shell, a filtering matrix is arranged in the filtering shell, the filtering matrix is provided with a flow limiting rod, and the flow limiting rod moves back and forth to regulate the pressure of fluid when the fluid passes through the filtering shell. The invention can reduce the structural complexity, expand the arrangement space of the transmission, realize the regulation and control of pressure oil through the filter assembly and ensure the stable oil pressure.
Description
Technical Field
The invention belongs to the technical field of transmissions, and particularly relates to a hydraulic control device for a CVT of a motorcycle.
Background
The existing automatic transmission of the motorcycle comprises a DCT transmission and a belt type CVT transmission, and the belt type CVT structure is limited by a transmission medium and cannot transmit large torque, so that the automatic transmission of the motorcycle cannot be applied to a large-displacement motorcycle. To meet the market demand, metal belt CVT's have been developed, with the consequent need for transmission hydraulic control systems.
The invention of US7029409B2 proposes a hydraulic system for a CVT transmission of a motor vehicle having an oil pump for delivering oil from a tank to the transmission, said transmission comprising a first block and a second block. In each case, a valve mechanism is provided for controlling the pressure applied to the associated pulley block. A pressure selector valve is arranged between the valve means associated with the respective pulley block, the position of which determines which of the valve means controls the main pressure delivered by the oil pump. With this hydraulic system, the pressure of the transmission can be controlled reliably in the simplest possible manner, and a geometrically advantageous pulley ratio can be achieved.
However, in the hydraulic system of the existing CVT transmission, a plurality of valve mechanisms are engaged to control the pressure variation at the input pulley and the output pulley and the pressure variation of the main oil passage, which increases the difficulty and complexity of control and increases the number of control chips of the automatic transmission control unit. Furthermore, because the transmission layout space of a motorcycle is greatly reduced compared to a passenger car, existing hydraulic control system solutions have been difficult to meet the layout requirements of the transmission.
Disclosure of Invention
The invention aims to provide a hydraulic control device for a CVT of a motorcycle, which can reduce the difficulty and complexity of control, expand the arrangement space of the transmission, stabilize the oil pressure and strengthen the protection of subsequent parts.
The technical scheme adopted by the invention for achieving the purpose is as follows:
The hydraulic control device for the CVT of the motorcycle comprises an oil pump and a main oil way, wherein the upstream of the main oil way is connected with the oil pump, the main oil way is provided with a main regulating valve, the oil outlet end of the main regulating valve is provided with a first oil outlet channel and a second oil outlet channel, and the first oil outlet channel and the second oil outlet channel are respectively correspondingly connected with an input belt pulley shaft and an output belt pulley shaft; the main regulating valve is matched with a pilot oil way; the pilot oil way is provided with a pressure switching valve, the oil inlet end of the pressure switching valve is provided with at least two oil inlet channels, and the pressure switching valve is used for leading high-pressure oil from the oil inlet channels into the main regulating valve;
The oil outlet end of the oil pump is provided with a filter assembly, the filter assembly comprises a filter shell, a filter substrate is arranged in the filter shell, a flow limiting rod is arranged in the filter substrate, and the flow limiting rod moves back and forth and is used for adjusting the pressure of fluid when the fluid passes through the filter shell.
Further, the plurality of oil inlet passages are each provided with an electromagnetic valve.
Further, the first oil outlet channel and the second oil outlet channel are respectively provided with a first regulating valve and a second regulating valve.
By adopting the technical scheme, the pressure difference between different oil inlet channels is judged through the pressure switching valve, and the pressure oil with higher pressure is connected into the main oil way, so that the output oil pressure of the main regulating valve is regulated. The output pressure of the first oil outlet channel and the output pressure of the second oil outlet channel are respectively regulated and controlled by the first regulating valve and the second regulating valve, so that the regulation and control of the pressure at the positions of the input belt wheel shaft and the output belt wheel shaft are realized.
In the filter component, the filter shell and the filter matrix are matched to realize the filtration of the pressure oil, so as to prevent residues or impurities in the pressure oil from causing irreversible damage to subsequent precise parts. The arrangement of the flow limiting rod can respond to the oil pressure of the pressure oil, the position of the flow limiting rod can be adjusted according to the pressure, the flow speed and the flow direction of the pressure oil flowing through the filtering matrix are adjusted, the instantaneous flow of the pressure oil through the filtering shell is controlled, the oil pressure of the pressure oil is adjusted, the influence on the oil pressure in the operation process of the oil pump is reduced, the oil pressure area of the pressure oil flowing through the filtering component is enabled to be stable, and the variation range of the oil pressure in an oil way inside the hydraulic control device is reduced.
According to one embodiment of the invention, the outer side wall of the filter base is a fluid inlet end, and the inner side wall of the filter base is provided with a fluid discharge hole; a gap is arranged between the filter base and the inner wall of the filter shell, and is used for enabling fluid to enter the filter base.
According to one embodiment of the invention, the filter body is arranged in the filter shell and is of an annular structure, and the filter body comprises a filter cylinder arranged in the middle and a filter main board sleeved outside the filter cylinder.
The two ends of the filtering cylinder body are opened, one end of the filtering cylinder body is correspondingly arranged with the oil inlet end of the filtering shell, and the other end of the filtering cylinder body is correspondingly arranged with the oil outlet end of the filtering shell; the side wall of the filter cylinder is provided with a first hole body for discharging fluid; the flow limiting rod is at least partially accommodated in the filter cylinder; the filter main board is provided with a filter hole; the plurality of filter mainboards are arranged in a stacking way, and filter materials are filled between the adjacently arranged filter mainboards; a gap is arranged between the outer edge of the filter main board and the inner wall of the filter shell, and fluid enters the filter matrix through the gap.
This can lengthen the path of the pressure oil flowing from the outside of the filter base, thereby improving the filtering effect. The filter main board is utilized to divide and then merge the pressure oil flowing through for multiple times, so that the balance of the pressure oil is improved.
According to one embodiment of the invention, the flow-limiting rod comprises a filtering slide rod and a jacking rod which are movably matched; the jacking rod and the filtering slide rod are arranged along the axial direction of the filtering cylinder body. The filter sliding rod is sleeved in the filter cylinder; one end of the jacking rod extends into the filtering cylinder and is arranged corresponding to one end of the filtering slide rod, and the other end of the jacking rod is exposed out of the filtering cylinder.
Further, the inner wall of the filtering cylinder body is provided with a second limiting ring for limiting the moving range of the filtering slide rod. The second limiting rings can be arranged at the upper end and the lower end of the filter cylinder body, so that the filter slide rod can be prevented from being separated from the filter cylinder body in the moving process.
Therefore, in the process that the pressure oil enters the filtering shell, a certain impact force is applied to the jacking rod, and when the oil pressure of the pressure oil exceeds a certain range, the jacking rod moves towards a direction close to the filtering slide rod under the impact action of the pressure oil and drives the filtering slide rod to move in the same direction. When the oil pressure increases, the filter slide bar moves towards the direction close to the oil outlet end of the filter shell, so that the space of the pressure oil which enters the space inside the filter cylinder through the filter base body and is directly discharged outwards in the front of the movement of the filter slide bar is reduced, the space of the pressure oil which enters the space inside the filter cylinder through the filter base body and is discharged outwards by bypassing the filter slide bar in the rear of the movement of the filter slide bar is enlarged, and the filter slide bar has resistance to the pressure oil in the rear space. That is, when the filter slide bar moves toward the oil outlet end of the filter housing, the amount of the pressurized oil instantaneously discharged through the filter housing can be reduced, and the oil pressure can be reduced.
The filter slide bar can rotate under the dual action of jack-up pole and side pressure oil in the in-process of follow cartridge filter body axial reciprocating, drives the pressure oil on every side at pivoted in-process and changes flow direction to improve the equilibrium of pressure oil. Therefore, the jack-up rod and the filtering slide rod are matched, so that the filtering effect on the pressure oil can be improved, the flow speed and the oil pressure of the pressure oil discharge can be regulated and controlled, and the pressure oil discharged through the filtering assembly is ensured to have relatively stable oil pressure.
According to one embodiment of the invention, one end of the filter slide bar, which is far away from the jacking rod, is provided with a filter slide block, and the filter slide block is provided with a second hole body which extends along the radial direction of the filter cylinder body; the outer surface of the filtering slide block is provided with guide plate bodies which are spirally arranged in an extending way.
Thereby, the second bore provides more flow paths for the pressure oil entering the interior of the filter cartridge, helping to promote mixing of the pressure oil. Specifically, after the pressure oil enters the second hole body, the pressure oil can move along with the filtering slide rod, so that the flow direction of the part of pressure oil is changed when the pressure oil flows out of the second hole body, and the disturbance of the pressure oil near the filtering slide block is caused under the impact action of the lateral pressure oil, so that the mixing balance of the pressure oil is improved.
The arrangement of the guide plate body can realize the division of the pressure oil near the filtering slide block, and can guide the pressure oil near the filtering slide block to flow in the rotating process of the filtering slide block so as to promote the generation of rotational flow, thereby avoiding the adhesion of the pressure oil on the inner wall of the filtering cylinder body, preventing the pressure oil from depositing in the filtering cylinder body and avoiding the occurrence of flowing dead angles.
According to one embodiment of the invention, the two ends of the jacking rod are respectively provided with a first butt joint block and a second butt joint block, and the second butt joint block is arranged corresponding to the filtering slide rod; the outside cover of jack-up pole is equipped with the spring, and the spring is located between the lateral wall of first butt joint piece and filtration casing.
Therefore, the matching accuracy of the jacking rod and the filtering slide rod can be ensured by utilizing the arrangement of the first butt joint block and the second butt joint block, and butt joint dislocation between the jacking rod and the filtering slide rod caused by the impact of pressure oil is avoided. And because the jack-up pole is portable, first butt joint piece and second butt joint piece are at the in-process of reciprocating along with the jack-up pole, can cause the disturbance of the pressure oil in a relatively large scale inside and outside the filtration casing, promote the pressure oil mixing to avoid appearing flowing the dead angle, prevent pressure oil deposit or adhesion.
According to one embodiment of the invention, the oil inlet end of the filtering shell is connected with a flow inlet pipe, a piston push rod is arranged in the flow inlet pipe, and the piston push rod is arranged corresponding to the flow limiting rod; the piston push rod can move back and forth along the axial direction of the inflow pipe.
Therefore, the piston push rod in the inflow pipe drives the jacking rod and the filtering slide rod to move under the impact action of the pressure oil, the response time of the jacking rod and the filtering slide rod to the pressure oil pressure change can be shortened, and the stability of the pressure oil discharged through the filtering shell is improved.
Further, one end of the jacking rod far away from the filtering slide rod stretches into the flow inlet pipe, and the jacking rod is arranged corresponding to the piston push rod through the first butt joint block.
Further, a third limiting ring is arranged in the inflow pipe and used for limiting the moving range of the piston push rod, and the piston push rod is arranged between the third limiting ring and the filtering shell.
According to one embodiment of the invention, the piston rod is hollow in the interior and is arranged in the longitudinal direction of the piston rod in the direction of the fluid flow.
Therefore, the pressure oil can be regulated and controlled by the piston push rod in the inflow pipe. The arrangement of the piston push rod can realize the division of pressure oil in the inflow pipe, namely, the pressure oil in the inflow pipe partially flows from the outside of the piston push rod when flowing through the piston push rod, and partially flows into the inside of the piston push rod. In the initial period that the oil pressure of pressure oil becomes, the piston push rod moves towards the direction close to the filtering matrix, and is abutted with the first butt joint block on the jacking rod, so that the plugging of the piston push rod is realized, the oil discharge cross section of the oil inlet pipe is reduced, the instantaneous flow velocity of the pressure oil is further improved, the piston push rod and the jacking rod move towards the direction close to the filtering matrix, and the response speed of the jacking rod and the filtering slide rod is improved.
Drawings
Fig. 1 is a schematic view of an oil passage structure of a hydraulic control device for a CVT transmission of a motorcycle according to embodiment 1 of the present invention;
Fig. 2 is a schematic view showing a structure of a filter assembly of a hydraulic control device for a CVT transmission of a motorcycle according to embodiment 1 of the present invention;
FIG. 3 is a schematic view of the filter substrate of FIG. 2;
FIG. 4 is a schematic view of the part A of FIG. 2 in an enlarged configuration;
FIG. 5 is a schematic view of the structure of the filter slide rod shown in FIG. 2;
Fig. 6 is a schematic structural view of a piston rod of a hydraulic control device for a CVT transmission of a motorcycle according to embodiment 2 of the present invention;
FIG. 7 is a schematic view of the part B of FIG. 6 in an enlarged partial structure;
fig. 8 is a schematic structural view of a flow-retarding base of a hydraulic control apparatus for a CVT transmission of a motorcycle according to embodiment 3 of the present invention;
FIG. 9 is a schematic view of the enlarged partial structure of the portion C in FIG. 8;
FIG. 10 is a schematic view of the filter plate shown in FIG. 8;
fig. 11 is a schematic view of the flow path of hydraulic oil inside a filter housing in a hydraulic control device for a CVT transmission of a motorcycle according to embodiment 3 of the present invention.
Reference numerals: an oil pump 1; a main regulating valve 2; a first electromagnetic valve 3a; a second electromagnetic valve 3b; a pressure switching valve 4; a first regulating valve 5; a second regulating valve 6; an input pulley shaft 7; an output pulley shaft 8; a filter assembly 9; a filter housing 10; a flow inlet pipe 11; a filter base 12; a filter cylinder 13; a first hole 14; a second stop collar 15; a filter main board 16; jacking up the rod 20; a first abutment 21; a second abutment 22; a spring 23; a filter slide 30; a filter slider 31; a second aperture 32; a deflector body 33; a piston push rod 40; a first cylinder 41; a second cylinder 42; a flange 43; a slow flow matrix 50; a first plate 51; a second plate 52; a filter plate 53; a first protrusion 54; a second protrusion 55; a chute 56; an elastic member 57.
Detailed Description
The technical scheme of the invention is further described in detail below with reference to the detailed description and the accompanying drawings. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Example 1
Fig. 1 to 5 schematically show a hydraulic control apparatus for a CVT transmission of a motorcycle according to an embodiment of the present invention. As shown in the figure, the device comprises an oil pump 1, a pilot oil passage and a main oil passage, wherein the upstream of the main oil passage is connected with the oil pump 1, the main oil passage is provided with a main regulating valve 2, and the main regulating valve 2 is matched with the pilot oil passage; the pilot oil way is provided with a pressure switching valve 4, and the oil inlet end of the pressure switching valve 4 is provided with at least two oil inlet channels; the plurality of oil inlet passages are all provided with electromagnetic valves. Referring to fig. 1, two oil inlet passages are provided, on which a first solenoid valve 3a and a second solenoid valve 3b are respectively provided. The oil outlet end of the main regulating valve 2 is provided with a first oil outlet channel and a second oil outlet channel, and the first oil outlet channel and the second oil outlet channel are respectively provided with a first regulating valve 5 and a second regulating valve 6. The first oil outlet channel and the second oil outlet channel are respectively correspondingly connected with the input pulley shaft 7 and the output pulley shaft 8.
By adopting the technical scheme, the pressure difference between different oil inlet channels is judged through the pressure switching valve 4, and the pressure difference is matched with the first electromagnetic valve 3a and the second electromagnetic valve 3b, so that pressure oil with higher pressure is connected into the main regulating valve 2 from the corresponding oil inlet channel, and the output oil pressure of the main regulating valve 2 is regulated. The output pressure of the first oil outlet channel and the output pressure of the second oil outlet channel are respectively regulated and controlled by the first regulating valve 5 and the second regulating valve 6, so that the regulation and control of the pressure at the positions of the input belt pulley shaft 7 and the output belt pulley shaft 8 are realized.
Thus, a solenoid valve for independently controlling the main regulating valve 2 is saved, the cost requirement is reduced, and simultaneously, the oil pressure of the main oil way can be automatically regulated along with the regulation change of the oil pressure at the first regulating valve 5 and the oil pressure at the second regulating valve 6, and the oil pressure of the main oil way is kept to be greater than or equal to the oil pressure at the first regulating valve 5 or the oil pressure of the main oil way is kept to be greater than or equal to the oil pressure at the second regulating valve 6. The complexity of control software caused by manufacturing errors of parts is greatly avoided through the scheme. The first electromagnetic valve 3a and the second electromagnetic valve 3b are utilized to control the first regulating valve 5, the second regulating valve 6 and the main regulating valve 2 so as to regulate three different pressures, meanwhile, the oil pressure of a main oil way is always more than or equal to the maximum pressure of the positions of the input pulley shaft 7 and the output pulley shaft 8, the loss of pressure can be reduced, the difficulty and the complexity of control can be reduced, the number of control chips of an automatic gearbox control unit is not required to be increased, the complexity of control channels and software control can be further reduced, and the platformization of the automatic gearbox control unit is conveniently realized. In addition, the number of the electromagnetic valves is reduced, so that the requirement of the hydraulic system control module on the arrangement space is reduced, and the arrangement space of the motorcycle is met.
Preferably, the pressure-switching valve 4 is configured as a self-actuated slide valve. The electromagnetic valves on the oil inlet channels introduce the oil pressures of different oil inlet channels into the pressure switching valve 4 at the same time, and the connection of the electromagnetic valves is determined by comparing the acting forces of the internal components of the self-operated regulating valve so as to actually participate in controlling the main regulating valve 2 on the main oil way.
Preferably, the oil pump 1 is a mechanical pump, an oil suction port on the mechanical pump is communicated with the oil bin, the mechanical pump is connected with the main oil way through a first branch, and the mechanical pump can be linked with a driving shaft of the engine through a chain sprocket.
Preferably, the first branch is provided with a flow control valve, when the rotation speed of the mechanical pump is high, the flow control valve is opened, so that the redundant flow directly flows back to the oil suction port of the oil pump 1, the waste of the flow can be prevented, the burden of a filter is reduced, and the working efficiency of the oil pump 1 is improved. The filter is a filtering component arranged on any existing oil path.
Preferably, the main oil path includes a solenoid valve for a clutch, the solenoid valve for the clutch directly controls a clutch piston of the clutch to realize the combination of the clutch, the pressure of the pressure oil output from the solenoid valve for the clutch is linearly adjustable, and different pressures can be output according to the requirement of the whole vehicle, so that the clutch reaches the optimal working state.
Preferably, the clutch solenoid valve is a normally low direct-acting solenoid valve. When the electromagnetic valve is not electrified, the output oil pressure of the electromagnetic valve is basically zero, so that the use safety of the whole vehicle is improved; meanwhile, the number of the sliding valves can be reduced, the connection of the engine can be disconnected conveniently in a limp-home mode, and a driver can easily push the motorcycle while driving safety is guaranteed.
The oil outlet end of the oil pump 1 is provided with a filter assembly 9, the filter assembly 9 comprises a filter housing 10, and a filter base 12 is arranged inside the filter housing 10. The cooperation of the filter housing 10 and the filter base 12 can realize the filtration of the pressure oil, so as to prevent the residue or impurity in the pressure oil from causing irreversible damage to the subsequent precise parts.
The filter base 12 is internally provided with a restrictor bar that reciprocates for regulating the pressure of the fluid as it passes through the filter housing 10. The oil inlet end of the filtering shell 10 is connected with a flow inlet pipe 11, a piston push rod 40 is arranged in the flow inlet pipe 11, and the piston push rod 40 is arranged corresponding to the flow limiting rod; the piston rod 40 can reciprocate in the axial direction of the inflow pipe 11. In this way, the piston push rod 40 inside the inflow pipe 11 drives the flow limiting rod to move under the impact action of the pressure oil, so that the response time of the flow limiting rod to the pressure oil pressure change can be shortened, and the stability of the pressure oil discharged through the filter housing 10 can be improved.
The setting of the flow limiting rod can respond to the oil pressure of the pressure oil, and adjusts the position of the flow limiting rod according to the pressure, so that the flow speed and the flow direction of the pressure oil flowing through the filter substrate 12 are adjusted, the instantaneous flow of the pressure oil through the filter shell 10 is controlled, the oil pressure of the pressure oil is adjusted, the influence on the oil pressure in the operation process of the oil pump 1 is reduced, the oil pressure area of the pressure oil flowing through the filter assembly 9 is enabled to be stable, and the variation range of the oil pressure in an oil way in the hydraulic control device is reduced.
Specifically, the filter body 12 is disposed inside the filter housing 10, the filter body 12 has a ring structure, and the filter body 12 includes a filter cylinder 13 disposed in the middle and a filter main board 16 sleeved outside the filter cylinder 13. The outer side wall of the filter substrate 12 is a fluid inlet end, and the inner side wall of the filter substrate 12 is provided with a fluid discharge hole; a gap is provided between the filter base 12 and the inner wall of the filter housing 10 for allowing fluid to enter the interior of the filter base 12.
The two ends of the filter cylinder body 13 are opened, one end of the filter cylinder body 13 is arranged corresponding to the oil inlet end of the filter shell 10, and the other end of the filter cylinder body 13 is arranged corresponding to the oil outlet end of the filter shell 10; the side wall of the filter cylinder 13 is provided with a first hole body 14 for discharging fluid; the filter main plate 16 is provided with filter holes; the plurality of filter mainboards 16 are stacked, and filter materials are filled between the adjacently arranged filter mainboards 16; a gap is provided between the outer edge of the filter main plate 16 and the inner wall of the filter housing 10 through which fluid enters the interior of the filter base 12.
Further, the plurality of filter mainboards 16 are connected in a staggered manner to form a Z-shaped structure. Specifically, among the plurality of filter mainboards 16 stacked up and down, the filter mainboard 16 located in the middle is connected with two filter mainboards 16 adjacent up and down through the outer edge and the inner edge respectively, so that a gap with a similar triangle section is formed between the plurality of filter mainboards 16, and the filter material is filled in the gap.
This can lengthen the path of the pressure oil flowing from the outside of the filter base 12, thereby improving the filtering effect. The multiple divisions of the pressure oil flowing through the filter main plate 16 are recombined, which contributes to the improvement of the pressure oil balance.
The flow limiting rod is at least partially accommodated in the filter cylinder 13 and comprises a filter slide rod 30 and a jacking rod 20 which are movably matched; the jacking rod 20 and the filtering slide rod 30 are arranged along the axial direction of the filtering cylinder 13. In the embodiment, a filtering slide bar 30 in the flow limiting bar is sleeved inside the filtering cylinder 13; one end of the jack-up rod 20 extends into the filter cylinder 13 and is disposed corresponding to one end of the filter slide rod 30, and the other end of the jack-up rod 20 is exposed outside the filter cylinder 13 and extends into the intake pipe 11 and is disposed corresponding to the piston push rod 40. The pressure oil can be controlled by the piston rod 40 in the inflow pipe 11, and the response speed of the jack-up rod 20 and the filter slide rod 30 can be improved.
Further, a third limiting ring is disposed inside the inflow pipe 11 for limiting the movement range of the piston push rod 40, and the piston push rod 40 is disposed between the third limiting ring and the filter housing 10.
Further, a second limiting ring 15 is disposed on the inner wall of the filter cylinder 13 to limit the movement range of the filter slide 30. The second limiting rings 15 may be provided at both upper and lower ends of the filter cylinder 13, so that the filter slide bar 30 can be prevented from being separated from the filter cylinder 13 during the movement. Furthermore, it is possible to provide a device for the treatment of a disease. The second limiting ring 15 provided with the bottom of the filter cylinder 13 can be in sealing connection with the jacking rod 20 through a sealing ring, so that pressure oil is prevented from directly entering the filter cylinder 13 from the inside of the second limiting ring 15 without being filtered.
Therefore, in the process that the pressure oil enters the filtering shell 10, a certain impact force is applied to the jacking rod 20, and when the oil pressure of the pressure oil exceeds a certain range, the jacking rod 20 moves towards the direction close to the filtering slide rod 30 under the impact action of the pressure oil, and drives the filtering slide rod 30 to move in the same direction. When the oil pressure increases, the filter slide bar 30 moves in a direction approaching the oil outlet end of the filter housing 10, so that the space of the pressure oil which enters the interior of the filter cylinder 13 via the filter base 12 and is directly discharged outward in front of the movement thereof is reduced, and the space of the pressure oil which enters the interior of the filter cylinder 13 via the filter base 12 and is discharged outward bypassing the filter slide bar 30 in rear of the movement thereof is enlarged, and the filter slide bar 30 has resistance to the pressure oil in the rear space. That is, when the filter slide bar 30 moves in the direction of the oil outlet end of the filter housing 10, the amount of the pressurized oil instantaneously discharged through the filter housing 10 can be reduced, and the oil pressure can be reduced.
The filtering slide bar 30 rotates under the dual actions of the jack-up bar 20 and the lateral pressure oil in the process of moving up and down along the axial direction of the filtering cylinder 13, and drives the surrounding pressure oil to change the flow direction in the rotating process, that is, the pressure oil flowing into the filtering cylinder 13 is uncertain, so that the pressure oil can form a rotational flow, the generation of the rotational flow can promote part of the pressure oil to reenter the lateral space of the filtering cylinder 13, the filtering main board 16 and the filtering material are accepted again, and the balance of the pressure oil is improved. In addition, when the instantaneous oil pressure at the oil inlet end of the filter housing 10 is large, the filter slide rod 30 can temporarily block the oil outlet end of the filter cylinder 13, so that the outflow amount of the pressure oil is reduced, and the speed of discharging the pressure oil from the filter base 12 is further reduced. Conversely, when the oil pressure is low when the pressure oil enters the filter housing 10, the displacement amount of the jack rod 20 and the filter slide rod 30 in the axial direction of the filter cylinder 13 is small, and the influence on the flow direction of the pressure oil is also small, so that the flow rate of the pressure oil, that is, the oil pressure of the pressure oil discharged through the filter assembly 9 can be ensured.
The end of the filter slide bar 30 away from the jacking rod 20 is provided with a filter slide block 31, the filter slide block 31 is provided with a second hole body 32, and the second hole body 32 extends along the radial direction of the filter cylinder 13; the outer surface of the filter slide block 31 is provided with a guide plate body 33, and the guide plate body 33 is spirally arranged in an extending way.
Thus, the second bore 32 provides more flow paths for the pressurized oil entering the interior of the filter cartridge 13, helping to promote mixing of the pressurized oil. Specifically, after the pressure oil enters the second hole 32, the pressure oil can move along with the filtering slide rod 30, so that the flow direction of the pressure oil is changed when the pressure oil flows out of the second hole 32, and the disturbance of the pressure oil near the filtering slide block 31 is caused under the impact action of the lateral pressure oil, so that the mixing balance of the pressure oil is improved.
In addition, the setting of second hole body 32 can be when filtering the oil outlet end shutoff of slider 31 with filtering barrel 13, provides the flow path for the pressure oil, avoids filtering the inside too high structural damage that causes of oil pressure of casing 10, guarantees the stability of filtering the subassembly 9 structure.
The baffle body 33 is arranged, so that the pressure oil near the filter slide block 31 can be divided, the pressure oil near the filter slide block 31 can be guided to flow in the process of rotating the filter slide block 31 to promote the generation of rotational flow, the flow direction of the pressure oil is changed, the flow speed is adjusted, the mixing of the pressure oil is promoted, the impact of the pressure oil on the inner wall of the filter cylinder 13 is enhanced, the pressure oil is prevented from adhering to the inner wall of the filter cylinder 13, the pressure oil is prevented from depositing in the filter cylinder 13, and the flowing dead angle is avoided. In addition, in the process of moving up and down and rotating along with the filter slide block 31, the guide plate body 33 can be abutted with the inner wall of the filter cylinder 13, so that the cleaning effect of the filter cylinder 13 can be realized, the first hole body 14 can be prevented from being blocked, and the pressure oil can be prevented from adhering to the inner wall of the filter cylinder 13.
The two ends of the jacking rod 20 are respectively provided with a first butt joint block 21 and a second butt joint block 22, the first butt joint block 21 is correspondingly arranged with the tail end of the piston push rod 40, and the second butt joint block 22 is correspondingly arranged with the filtering slide rod 30; the spring 23 is sleeved outside the jacking rod 20, and the spring 23 is arranged between the first butt joint block 21 and the outer side wall of the filter casing 10.
In this way, the arrangement of the first butt joint block 21 and the second butt joint block 22 can ensure the matching accuracy of the piston push rod 40, the jacking rod 20 and the filtering slide rod 30, and avoid the butt joint dislocation between the piston push rod 40 and the jacking rod 20 and between the jacking rod 20 and the filtering slide rod 30 caused by the impact of pressure oil. In addition, because the jack-up rod 20 is movable, the first butt joint block 21 and the second butt joint block 22 can cause disturbance of pressure oil in a larger range inside and outside the filter housing 10 in the process of reciprocating along with the jack-up rod 20, promote pressure oil mixing, avoid occurrence of flowing dead angles and prevent pressure oil deposition or adhesion. The spring 23 can ensure the smooth reset of the jacking rod 20, and further ensure the reset of the filtering slide rod 30 and the piston push rod 40.
The hydraulic control device of the embodiment is applied to a CVT transmission of a motorcycle, and the cooperation of the jack-up rod 20 and the filtering slide rod 30 can not only improve the filtering effect on the pressure oil, but also regulate and control the flow rate and the oil pressure of the pressure oil discharge, so as to ensure that the pressure oil discharged through the filtering component 9 has a relatively stable oil pressure.
Example 2
Fig. 6 to 7 schematically show a hydraulic control apparatus for a CVT transmission for a motorcycle according to another embodiment of the present invention, different from that of example 1 in that:
the piston rod 40 is hollow, and the length direction of the piston rod 40 is set along the fluid flow direction.
In this way, the pressure oil can be regulated and controlled by the piston rod 40 inside the inflow pipe 11. The piston rod 40 is arranged to divide the pressure oil in the inlet pipe 11, that is, the pressure oil in the inlet pipe 11 flows partially from the outside of the piston rod 40 and partially into the inside of the piston rod 40 when flowing through the piston rod 40. In an initial period when the oil pressure of the pressure oil becomes, the piston push rod 40 moves towards the direction approaching the filter base body 12 and is abutted against the first butt joint block 21 on the jacking rod 20, so that the blocking of the piston push rod 40 is realized, the oil discharge cross section of the oil inlet pipe is reduced, the instantaneous flow rate of the pressure oil is further improved, the piston push rod 40 and the jacking rod 20 move towards the direction approaching the filter base body 12, and the response speed of the jacking rod 20 and the filter slide rod 30 is improved.
Further, the piston push rod 40 includes a first cylinder 41, and a second cylinder 42 is sleeved inside the first cylinder 41. The first cylinder 41 and the second cylinder 42 are both open-ended.
A gap is provided between the inner wall of the first cylinder 41 and the outer wall of the second cylinder 42. Further, the outer wall of the second cylinder 42 is provided with a flange 43, and the flange 43 abuts against the inner wall of the first cylinder 41.
Thus, by the engagement of the first cylinder 41 and the second cylinder 42, the pressure oil can be split and joined in the inflow pipe 11, and the pressure oil can be balanced. The first cylinder 41 and the second cylinder 42 are sleeved in an inner sleeve manner, and the first cylinder 41 can be utilized to achieve disturbance of pressure oil in the first cylinder 41, so that blockage caused by accumulation of the pressure oil in the first cylinder 41 is avoided, the inside of the first cylinder 41 can be cleaned through the arrangement of the flange 43, adhesion of the pressure oil is prevented, and fluidity of the pressure oil between the first cylinder 41 and the second cylinder 42 can be improved.
Further, a spring may be further disposed between the first cylinder 41 and the second cylinder 42, for resetting the second cylinder 42. The side wall of the first cylinder 41 can be further provided with a third hole body, the third hole body is arranged at one end of the first cylinder 41 far away from the jacking rod 20, the second cylinder 42 moves back and forth relative to the first cylinder 41, and the third hole body can be exposed or plugged. In this way, during the process of moving the second cylinder 42 relative to the first cylinder 41, the pressure oil between the two can be discharged through the third hole body, so as to improve the fluidity of the pressure oil.
Example 3
Fig. 8 to 11 schematically show a hydraulic control apparatus for a CVT transmission for a motorcycle according to another embodiment of the present invention, different from that of example 1 in that:
The oil outlet end of the filter housing 10 is provided with a slow flow component, and the slow flow component is disposed downstream of the filter substrate 12 and includes an annular slow flow substrate 50. The slow flow substrate 50 is of a closed structure and comprises a first plate body 51 and a second plate body 52 which are oppositely arranged, and a slow flow space is formed between the first plate body 51 and the second plate body 52. The first plate body 51 is annular and is arranged opposite to the filter substrate 12, and holes are distributed in the first plate body 51 for pressure oil to enter the slow flow space; the second plate 52 is circular and is arranged towards the oil outlet end of the filter housing 10, and holes are arranged on the second plate 52 for discharging pressure oil out of the slow flow space. In order to ensure smooth flow of the pressure oil, gaps are arranged between the first plate body 51 and the filter base 12, and between the second plate body 52 and the inner wall of the filter housing 10; to avoid any flow of pressurized oil from the outside of the cushioning base, the outer side wall of the cushioning base is provided with a flange 43 for abutment against the inner wall of the cushioning shell. In addition, corresponding components can be arranged according to the requirement to ensure the flow direction of the pressure oil.
A filter plate 53 is arranged between the first plate body 51 and the second plate body 52, and the filter plate 53 is provided with filter holes; the plurality of filter plates 53 are uniformly dispersed in a circumferential array between the first plate body 51 and the second plate body 52. The filter plate 53 is an arc-shaped plate structure.
The filter plate 53 is movably matched with the first plate 51 and the second plate 52. Specifically, the filter plate 53 is rotatable, and the rotation axis of the filter plate 53 is parallel to the axes of the first plate body 51 and the second plate body 52. Further, the filter plate 53, the first plate 51 and the second plate 52 are provided with a first protrusion 54 and a second protrusion 55 corresponding to the attached end surfaces; the filter plate 53 can rotate about the line connecting the two first protrusions 54. And, the opposite sides of the first plate 51 and the second plate 52 are correspondingly provided with sliding grooves 56, the second protrusions 55 are embedded in the corresponding sliding grooves 56, and the second protrusions 55 at the upper and lower ends of the filter plate 53 can slide in the range of the sliding grooves 56 in the process of rotating by taking the connecting line of the two first protrusions 54 as an axis. Further, with respect to the second protrusion 55, the first protrusion 54 is closer to the axes of the first plate 51 and the second plate 52, and the chute 56 is an arc structure disposed at the outer edges of the first plate 51 and the second plate 52. And, the both ends of the chute 56 are also provided with elastic members 57 for realizing the rebound of the second slide plate. The elastic member 57 may be provided as a spring or a metal elastic sheet, etc.
Referring to fig. 11, arrows schematically illustrate the flow path of hydraulic oil after it enters the filter housing 10 via the inlet pipe 11. The slow flow treatment of the pressure oil can be realized by utilizing the arrangement of the slow flow component, the average speed of the pressure oil is balanced, the stability of the subsequent flow and the temperature balance are improved, and the noise of the subsequent operation caused by unbalanced pressure oil or turbulent flow is prevented; and can prevent bubbles from being stored in the pressure oil, and reduce the probability of damaging the follow-up precision device.
The filter plate 53 slides back and forth relative to the chute 56 under the impact of the pressure oil, so that the contact surface to the pressure oil can be enlarged, the filtering effect is improved, and in this way, the filter holes of the filter plate 53 can repeatedly cut media, even bubbles and the like in the pressure oil, so that bubbles, particularly micro bubbles, existing in the pressure oil are eliminated. In addition, the reciprocating swing motion of the filter plate 53 is helpful to promote the trapped matters on the surface of the filter plate 53 to be thrown to the peripheral direction of the slow flow component, so that the trapped matters are relatively concentrated and gathered outside the buffer component and far away from the positions of the second hole and the third hole, and the effects of concentrated collection and filtration of impurities and avoiding impurity discharge are realized.
Conventional operations in the operation steps of the present invention are well known to those skilled in the art, and are not described herein.
While the foregoing embodiments have been described in detail in connection with the embodiments of the invention, it should be understood that the foregoing embodiments are merely illustrative of the invention and are not intended to limit the invention, and any modifications, additions, substitutions and the like made within the principles of the invention are intended to be included within the scope of the invention.
Claims (5)
1. A hydraulic control device for a CVT transmission of a motorcycle, characterized by comprising an oil pump (1) and a main circuit provided with a main regulator valve (2); the oil pump (1) is matched with a filter shell (10), a filter substrate (12) is arranged in the filter shell (10), and the filter substrate (12) is provided with a flow limiting rod which moves back and forth and is used for adjusting the pressure of fluid when the fluid passes through the filter shell (10);
The filter substrate (12) comprises a filter cylinder (13) arranged in the middle and a filter main board (16) sleeved outside the filter cylinder (13); the flow limiting rod comprises a filtering slide rod (30) and a jacking rod (20) which are movably matched, the filtering slide rod (30) is arranged in the filtering cylinder body (13), one end of the jacking rod (20) stretches into the filtering cylinder body (13) and is arranged corresponding to one end of the filtering slide rod (30), and the other end of the jacking rod (20) is exposed out of the filtering cylinder body (13); a filtering sliding block (31) is arranged at one end, far away from the jacking rod (20), of the filtering sliding rod (30), a second hole body (32) is arranged on the filtering sliding block (31), and the second hole body (32) extends along the radial direction of the filtering barrel (13); the outer surface of the filtering slide block (31) is provided with a guide plate body (33).
2. A hydraulic control apparatus for a CVT transmission of a motorcycle according to claim 1,
The two ends of the filter cylinder (13) are open, and a first hole body (14) is arranged on the side wall of the filter cylinder (13); the flow limiting rod is accommodated in the filter cylinder (13);
the filter main board (16) is provided with filter holes; the number of the filter mainboards (16) is plural, and filter materials are filled between the filter mainboards (16) which are adjacently arranged; a gap is arranged between the outer edge of the filter main board (16) and the inner wall of the filter shell (10).
3. A hydraulic control apparatus for a CVT transmission of a motorcycle according to claim 1,
A first butt joint block (21) and a second butt joint block (22) are respectively arranged at two ends of the jacking rod (20), and the second butt joint block (22) is correspondingly arranged with the filtering slide rod (30); the outside cover of jack-up pole (20) is equipped with spring (23), spring (23) are located between first butt joint piece (21) and the filter base member (12).
4. A hydraulic control apparatus for a CVT transmission of a motorcycle according to claim 1,
The oil inlet end of the filtering shell (10) is connected with an inflow pipe (11), a piston push rod (40) is arranged in the inflow pipe (11), and the piston push rod (40) is arranged corresponding to the flow limiting rod; the piston push rod (40) can move back and forth along the axial direction of the inflow pipe (11).
5. A hydraulic control apparatus for a CVT transmission of a motorcycle according to claim 4,
The piston push rod (40) is hollow, and the length direction of the piston push rod (40) is arranged along the fluid flow direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202410424827.9A CN118009035B (en) | 2024-04-10 | 2024-04-10 | Hydraulic control device for CVT (continuously variable transmission) of motorcycle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410424827.9A CN118009035B (en) | 2024-04-10 | 2024-04-10 | Hydraulic control device for CVT (continuously variable transmission) of motorcycle |
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| CN118009035B true CN118009035B (en) | 2024-06-18 |
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| US6068762A (en) * | 1995-09-29 | 2000-05-30 | Parker-Hannifin Corporation | Reusable oil filter assembly |
| KR200471811Y1 (en) * | 2013-01-09 | 2014-03-20 | 주식회사 세원 | Spin-on oil filter with non-return valve |
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| GB684634A (en) * | 1950-06-27 | 1952-12-24 | Purolator Products Inc | Improvements in or relating to filters |
| US4935128A (en) * | 1988-06-06 | 1990-06-19 | Custom Chrome, Inc. | Motorcycle engine lubricating oil filter apparatus |
| US8753247B2 (en) * | 2009-04-15 | 2014-06-17 | Yamaha Hatsudoki Kabushiki Kaisha | Two-wheeled motor vehicle |
| CN204493672U (en) * | 2015-03-02 | 2015-07-22 | 安徽江淮汽车股份有限公司 | A kind of filtration system for automatic transmission case |
| CN205559908U (en) * | 2016-05-10 | 2016-09-07 | 艾欧史密斯(中国)热水器有限公司 | Decompression filter equipment |
| DE102018009928A1 (en) * | 2018-12-17 | 2020-06-18 | Daimler Ag | Oil filter for a motor vehicle and filter cartridge for an oil filter |
| CN112607951A (en) * | 2021-02-26 | 2021-04-06 | 新昌县金瓯新能源科技有限公司 | Energy-saving filtering device |
| CN218152282U (en) * | 2022-09-15 | 2022-12-27 | 重庆静泷科技有限公司 | Motorcycle engine speed changer |
| CN219366481U (en) * | 2022-12-27 | 2023-07-18 | 上海永捷液压气动有限公司 | Hydraulic oil injection mechanism of bucket wheel machine |
| CN116587834B (en) * | 2023-07-19 | 2023-10-13 | 浙江万里扬新能源驱动有限公司杭州分公司 | Hybrid control system for vehicle |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6068762A (en) * | 1995-09-29 | 2000-05-30 | Parker-Hannifin Corporation | Reusable oil filter assembly |
| KR200471811Y1 (en) * | 2013-01-09 | 2014-03-20 | 주식회사 세원 | Spin-on oil filter with non-return valve |
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| CN118009035A (en) | 2024-05-10 |
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