CN109681630A - The speed ratio control system and speed ratio control method of stepless transmission - Google Patents
The speed ratio control system and speed ratio control method of stepless transmission Download PDFInfo
- Publication number
- CN109681630A CN109681630A CN201710980295.7A CN201710980295A CN109681630A CN 109681630 A CN109681630 A CN 109681630A CN 201710980295 A CN201710980295 A CN 201710980295A CN 109681630 A CN109681630 A CN 109681630A
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- Prior art keywords
- driving wheel
- wheel
- speed ratio
- ratio control
- control system
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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
- F16H61/66254—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 controlling of shifting being influenced by a signal derived from the engine and the main coupling
-
- 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
- F16H61/26—Generation or transmission of movements for final actuating mechanisms
- F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
- F16H61/32—Electric motors actuators or related electrical control means therefor
-
- 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
- F16H61/26—Generation or transmission of movements for final actuating mechanisms
- F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
- F16H61/32—Electric motors actuators or related electrical control means therefor
- F16H2061/326—Actuators for range selection, i.e. actuators for controlling the range selector or the manual range valve in the transmission
-
- 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
- F16H2061/6602—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 at least two dynamo-electric machines for creating an electric power path inside the transmission device, e.g. using generator and motor for a variable power torque path
- F16H2061/6603—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 at least two dynamo-electric machines for creating an electric power path inside the transmission device, e.g. using generator and motor for a variable power torque path characterised by changing ratio in the mechanical gearing
Abstract
The invention discloses the speed ratio control system of stepless transmission and speed ratio control method, the corresponding motor of each driving wheel of stepless transmission, the motor includes the motor shaft for rotating output power;The speed ratio control method is by the axial movement for being converted into corresponding driving wheel of the motor shaft, and the turnning circle by adjusting the motor shaft and rotation direction change distance and the direction of two driving wheels axial movement, keep two driving wheels separate or close to corresponding quiet wheel;The transmission parts and shift fork that the speed ratio control system is connected to the motor using controller control realize above-mentioned control method.The present invention drives the transmission parts being connected with motor shaft and shift fork to carry out mechanical action by the turnning circle and rotation direction of control motor shaft, mechanical action fast response time and it is accurate in place, shorten the speed ratio shift period, improve the precision of speed ratio shift, keep speed-ratio regulation convenient and efficient accurate, improves the driving experience of driver.
Description
Technical field
The present invention relates to stepless transmission technical fields, more particularly to the speed ratio control system and speed ratio of stepless transmission
Control method.
Background technique
In the prior art, the speed ratio of stepless transmission is by HYDRAULIC CONTROL SYSTEM.Solenoid valve is provided in hydraulic system oil duct
And oil pressure sensor, the oil liquid in oil duct directly act on the driving wheel driving wheel and driven wheel driving wheel of stepless transmission.Controller
By pressure sensor feedback come the size of current of oil pressure duty control solenoid valve thus changed with to change the aperture of solenoid valve
Become the oil pressure size in oil duct, and then change the axial position of driving wheel driving wheel and driven wheel driving wheel, reaches change variable speed
The purpose of device speed ratio.
In above-mentioned technical proposal, oil pressure feedback speed and oil pressure response speed are ideal not to the utmost, cause hydraulic system whole
Body response time length, low efficiency, cannot obtain the ideal speed-ratio regulation period;In addition, during above-mentioned HYDRAULIC CONTROL SYSTEM, oil
Liquid will appear different degrees of leakage, cause the fluctuation of oil pressure, cause the variation of driving wheel and driven wheel to transmission belt clamping force,
Drive belt slip is in turn resulted in, the service life of transmission belt and the driving experience of driver are influenced.
In view of this, how to develop the speed ratio control system and method for a kind of stepless transmission, speed ratio can be shortened
Regulating cycle, and drive belt slip phenomenon caused by capable of evading because of pressure fluctuation, are that those skilled in the art are urgently to be resolved
Technical problem.
Summary of the invention
In order to solve the above technical problems, the present invention provides a kind of speed ratio control system of stepless transmission, the stepless change
Fast device includes driving wheel and driven wheel, which is characterized in that the speed ratio control system includes:
Two motors respectively correspond the driving wheel driving wheel of the driving wheel and the driven wheel driving wheel of the driven wheel, and wrap
Include the motor shaft of rotation output power;
Controller controls the turnning circle and rotation direction of two motor shafts;
Two transmission parts, respectively with a motor axis connection;
Two shift forks are fixedly connected with the transmission parts respectively;
The transmission parts are by the movement for being converted into the corresponding shift fork of the corresponding motor shaft, and described group
Fork is mobile to drive the corresponding driving wheel driving wheel and driven wheel driving wheel axial movement.
The speed ratio control system of stepless transmission provided by the invention, by the turnning circle and the rotation side that control motor shaft
The mechanical component being connected to drive with motor shaft carries out mechanical action, on the one hand, the action response speed of mechanical component is faster than back
The action response speed of hydraulic package in scape technology, thus evaded hydraulic response it is slow caused by speed ratio period of change is long asks
Topic, makes speed-ratio regulation convenient and efficient;On the other hand, mechanical component action response accurately in place, has evaded oil liquid in hydraulic package
The problem of leaking the drive belt slip caused, extends the service life of transmission belt, and keep speed ratio shift smooth, improves and drive
The driving experience for the person of sailing.
Optionally, it is provided with hall position sensor in two motors, for detecting the position of the motor shaft, and
Position signal is passed into the controller, the controller adjusts the rotation side of two motor shafts according to the position signal
To.
Optionally, the transmission parts are ball screw arrangement or worm gear structure.
Optionally, the speed ratio control system further includes two synchronizing wheels;Two synchronizing wheels are respectively sleeved in the driving wheel
Wheel shaft and the driven wheel wheel shaft, and with corresponding wheel shaft rotate;When the shift fork is mobile, the corresponding synchronization is pushed
Wheel axial movement makes the synchronizing wheel push the corresponding driving wheel driving wheel and driven wheel driving wheel axial movement.
Optionally, the speed ratio control system further includes two thrust bearings, and two thrust bearings are respectively sleeved in the driving wheel
Wheel shaft and the driven wheel wheel shaft;The thrust bearing is located at the corresponding synchronizing wheel and moves in turn with the corresponding active
Between wheel and the driven wheel driving wheel.
Optionally, two thrust bearings are roller bearing.
Optionally, the contact position of the synchronizing wheel and the shift fork is disposed as wear-resistant material.
Optionally, circumferential recess is arranged in the outer peripheral surface of the synchronizing wheel;The shift fork include the first annulus, described first
The inner end of annulus is embedded in the circumferential recess;When the shift fork moves axially, the side wall of first annulus pushes described
The side wall of circumferential recess.
Optionally, the shift fork further includes the second annulus, and outer rim and the outer rim of first annulus are wholely set;
The inner end of second annulus is around the corresponding driving wheel driving wheel and the outer peripheral surface of the driven wheel driving wheel.
The present invention also provides a kind of speed ratio control methods of above-mentioned speed ratio control system, and the rotation of the motor shaft is converted
For the axial movement of the driving wheel driving wheel and the driven wheel driving wheel, and the turnning circle by adjusting the motor shaft and turn
Dynamic direction changes axial movement distance and the direction of the driving wheel driving wheel and the driven wheel driving wheel, to realize the stepless change
The transformation of fast device speed ratio.
Detailed description of the invention
Fig. 1 is the structure schematic diagram of the speed-ratio regulation system of stepless transmission provided by the invention.
Appended drawing reference is as follows in Fig. 1: 1 driving wheel, 11 driving wheel driving wheels, the quiet wheel of 12 driving wheels, 2 driven wheels, 21 driven wheels
Driving wheel, the quiet wheel of 22 driven wheels, 3 transmission belts, 4 motors, 5 controllers, 6 transmission parts, 7 shift forks, 71 first annulus, 72 second rings
Shape portion, 8 synchronizing wheels, 81 circumferential recess, 9 thrust bearings.
Specific embodiment
In order to enable those skilled in the art to better understand the solution of the present invention, with reference to the accompanying drawings and detailed description
The present invention is described in further detail.
Herein by the specific embodiment party of the speed ratio adjusting method of stepless transmission provided by the invention and speed-ratio regulation system
Formula and effect are discussed together.
Please refer to the structure schematic diagram for the speed-ratio regulation system that Fig. 1, Fig. 1 are stepless transmission provided by the invention.
As shown in Figure 1, stepless transmission includes driving wheel 1, driven wheel 2 and is tensioned to transmission belt 3 between the two.
Driving wheel 1 includes the driving wheel driving wheel 11 being coaxially oppositely arranged and the quiet wheel 12 of driving wheel, and one end of transmission belt 3 is clamped in the two
Between V-groove in;Driven wheel 2 includes the driven wheel driving wheel 21 that is coaxially oppositely arranged and the quiet wheel 22 of driven wheel, transmission belt 3 it is another
End is clamped in inverted V type slot between the two.Two it is quiet wheel with corresponding wheel shaft synchronous rotary, two driving wheels can either be with corresponding wheel shaft
Rotation, can also move along corresponding axle axial.
The speed ratio control system of stepless transmission provided by the invention includes:
Two motors 4, the corresponding above-mentioned driving wheel driving wheel 11 of a motor 4, another corresponds to above-mentioned driven wheel driving wheel 21;Two electricity
Machine 4 includes the motor shaft of rotation output power;
Controller 5, for controlling the turnning circle and rotation direction of two motor shafts;
Two transmission parts 6, respectively with a motor axis connection;
Two shift forks 7 are fixedly connected with the transmission parts 6 respectively;
The transmission parts 6 convert the rotary motion of the corresponding motor shaft to the movement of the corresponding shift fork 7,
The shift fork 7 drives corresponding driving wheel to move axially when mobile.
Specifically, driving wheel driving wheel 11 is certain close to the quiet wheel 12 of driving wheel when motor shaft rotates a fixing turn by a direction
Distance, meanwhile, driven wheel driving wheel 21 far from driven wheel 22 certain distances of quiet wheel, make be located at driving wheel 1 at 3 one end of transmission belt by
The edge for being pressed against driving wheel 1 is mobile, and 3 one end of transmission belt at driven wheel 2 is mobile to the center of driven wheel 2, i.e., as schemed
Show angle, transmission belt 3 is whole to be moved up, so that the contact radius of transmission belt 3 and driving wheel 1 increases, with the contact of driven wheel 2
Radius reduces, so that the speed ratio of stepless transmission be made to reduce corresponding amount.
When needing to increase speed ratio, the motor shaft of motor 4 is made to rotate a fixing turn by with above-mentioned contrary direction, it is main
Driving wheel driving wheel 11 far from driving wheel 12 certain distances of quiet wheel, meanwhile, driven wheel driving wheel 21 close to driven wheel 22 certain distances of quiet wheel,
Keep 3 one end of transmission belt being located at driving wheel 1 mobile to the center of driving wheel 1, correspondingly, being located at the transmission belt 3 at driven wheel 2
One end is mobile to the edge of driven wheel 2, i.e., angle as shown, and transmission belt 3 is whole to be moved down, so that transmission belt 3 and driving wheel 1
Contact radius reduce, increase with the contact radius of driven wheel 2, so that the speed ratio of stepless transmission be made to increase corresponding amount.
That is, the axial movement direction of corresponding driving wheel changes correspondingly, i.e., such as when the rotation direction of motor shaft changes
Illustrated angle, driving wheel axis are moved to the left or right along axial direction;When the turnning circle of motor shaft changes, the axial of corresponding driving wheel is moved
Dynamic distance changes correspondingly, and turnning circle is more, and the axial movement distance of driving wheel is bigger.
The speed ratio control system and speed ratio control method of stepless transmission provided by the invention pass through turning for control motor shaft
Moving-coil number and rotation direction drive the mechanical component being connected with motor shaft to carry out mechanical action, on the one hand, the movement of mechanical component
Response speed is faster than the action response speed of hydraulic package in background technique, thus evaded hydraulic response it is slow caused by speed ratio become
The problem for changing period length, makes speed-ratio regulation convenient and efficient;On the other hand, mechanical component action response accurately in place, has evaded liquid
The problem of pressing the transmission belt 3 that oil liquid leakage causes in component to skid, extends the service life of transmission belt 3, and become speed ratio
It changes smooth, improves the driving experience of driver.
Specifically, being provided with hall position sensor in two motors 4, can detecte by hall position sensor
The position of 4 rotor of motor to obtain the position of motor shaft, and passes to above-mentioned control by the position signal that conducting wire will test
Device 5 processed.Controller 5 according to hall position sensor feedback come position signal adjust motor shaft rotation direction.
Specifically, above-mentioned transmission parts 6 are ball screw arrangement or worm gear structure.As shown in Figure 1, with ball-screw
For structure, lead screw is connected with motor shaft or motor shaft is directly as lead screw.Feed screw nut is sheathed on lead screw, and shift fork 7 is solid
Surely feed screw nut is connected;Specifically, motor shaft, lead screw are parallel with the wheel shaft of the wheel shaft of above-mentioned driving wheel 1 and above-mentioned driven wheel 2
Setting, is moved so that shift fork 7 pushes driving wheel along corresponding axle axial.
Certainly, other, which can be realized, is also all possible the component that rotary motion is converted into linear motion, such as gear
Rack structure.
Further, as shown in Figure 1, the speed ratio control system further includes two synchronizing wheels 8.Wherein, a synchronizing wheel 8
It is placed on the wheel shaft of driving wheel 1, it is corresponding with driving wheel driving wheel 11;Another synchronizing wheel 8 is placed on the wheel shaft of driven wheel 2, with driven wheel
Driving wheel 21 is corresponding.Also, two synchronizing wheels 8 can either be rotated with corresponding wheel shaft, can also be moved along corresponding axle axial.Tool
Body, it can be between corresponding wheel shaft using key connection.
Also, the axial movement of synchronizing wheel 8 pushes realization to it when being mobile by shift fork 7, meanwhile, synchronizing wheel 8 is axial
Corresponding driving wheel can be pushed when mobile, corresponding driving wheel is made to generate above-mentioned axial movement.
Under this setup, shift fork 7 pushes corresponding driving wheel by synchronizing wheel 8 indirectly;Since synchronizing wheel 8 is with corresponding
Wheel shaft rotation, synchronizing wheel 8 directly contact the friction generated with the driving wheel of rotation much smaller than the directly contact rotation of mobile shift fork 7
The friction that driving wheel generates, thus can evade friction it is excessive caused by driving wheel inordinate wear and temperature rise is excessive etc. a series of asks
Topic.
Specifically, the synchronizing wheel 8 and the contact position of the shift fork 7 are disposed as wear-resistant material, further to be promoted
Frictional behaviour is conducive to extend the service life of control system.
Further, it is provided with thrust bearing 9 between the synchronizing wheel 8 and corresponding driving wheel, bearing is placed on corresponding
On wheel shaft, and rotated with wheel shaft.Two thrust bearings 9 are specifically as follows roller bearing, during speed ratio shift, synchronizing wheel 8
Thrust bearing 9 is pushed, thrust bearing 9 pushes corresponding driving wheel axial movement, passes through thrust axis between synchronizing wheel 8 and corresponding driving wheel
9 rolling surface mediate contact is held, to convert rolling friction for sliding friction, convenient for further decreasing rubbing between the two
Damage.
Specifically, as shown in Figure 1, the shift fork 7 includes the first annulus 71;Week is arranged in the outer peripheral surface of the synchronizing wheel 8
To groove 81, the inner ring surface of first annulus 71 is embedded in the circumferential recess 81.By taking driving wheel driving wheel 11 as an example, work as shift fork
7 when moving to right, and the side wall of first annulus 71 pushes the right sidewall of the circumferential recess 81, moves to right driving wheel driving wheel 11
Close to the quiet wheel 12 of driving wheel;When shift fork 7 moves to left, the side wall of first annulus 71 pushes the left side of the circumferential recess 81
Side wall moves to left driving wheel driving wheel 11 far from the quiet wheel 12 of driving wheel.
Under this setup, contact shift fork 7 with synchronizing wheel 8 one weeks, conducive to being uniformly distributed for power is pushed, in turn
3 clamping force of transmission belt is uniformly distributed conducive to driving wheel.
More specifically, as shown in Figure 1, the shift fork 7 further includes the second annulus 72.The outer rim of second annulus 72 and the
The outer rim of one annulus 71 is wholely set, i.e., cavity is formed between both ends, meanwhile, the inner ring surface of second annulus 72
Around the outer peripheral surface of the driving wheel, this setup can avoid driving wheel, implement convenient for the installation of shift fork 7, and be conducive to increase
The integral strength of strong shift fork 7.
The speed ratio control system to stepless transmission provided by the present invention and speed ratio control method have carried out in detail above
It introduces.Used herein a specific example illustrates the principle and implementation of the invention, the explanation of above embodiments
It is merely used to help understand method and its core concept of the invention.It should be pointed out that for the ordinary skill people of the art
Member for, without departing from the principle of the present invention, can with several improvements and modifications are made to the present invention, these improve and
Modification is also fallen within the protection scope of the claims of the present invention.
Claims (10)
1. the speed ratio control system of stepless transmission, the stepless transmission includes driving wheel (1) and driven wheel (2), feature
It is, the speed ratio control system includes:
Two motors (4) respectively correspond driven the moving in turn of the driving wheel driving wheel (11) and the driven wheel (2) of the driving wheel (1)
It takes turns (21), and includes the motor shaft of rotation output power;
Controller (5) controls the turnning circle and rotation direction of two motor shafts;
Two transmission parts (6), respectively with a motor axis connection;
Two shift forks (7) are fixedly connected with the transmission parts (6) respectively;
The transmission parts (6) convert the rotation of the corresponding motor shaft to the movement of the corresponding shift fork (7), described
Shift fork (7) is mobile to drive the corresponding driving wheel driving wheel (11) and the driven wheel driving wheel (21) axial movement.
2. speed ratio control system according to claim 1, which is characterized in that be provided with Hall in two motors (4)
Position sensor passes to the controller (5), the control for detecting the position of the motor shaft, and by position signal
Device (5) adjusts the rotation direction of two motor shafts according to the position signal.
3. speed ratio control system according to claim 1, which is characterized in that the transmission parts (6) are ball-screw knot
Structure or worm gear structure.
4. speed ratio control system according to claim 1-3, which is characterized in that the speed ratio control system also wraps
Include two synchronizing wheels (8);Two synchronizing wheels (8) are respectively sleeved in the wheel shaft of the driving wheel (1) and the wheel of the driven wheel (2)
Axis, and rotated with corresponding wheel shaft;When the shift fork (7) is mobile, the corresponding synchronizing wheel (8) axial movement is pushed, institute is made
It states synchronizing wheel (8) and pushes the corresponding driving wheel driving wheel (11) and the driven wheel driving wheel (21) axial movement.
5. speed ratio control system according to claim 4, which is characterized in that the speed ratio control system further includes two thrusts
Bearing (9), two thrust bearings (9) are respectively sleeved in the wheel shaft of the driving wheel (1) and the wheel shaft of the driven wheel (2);It is described to push away
Power bearing (9) is located at the corresponding synchronizing wheel (8) and the corresponding driving wheel driving wheel (11) and the driven wheel driving wheel
(21) between.
6. speed ratio control system according to claim 5, which is characterized in that two thrust bearings (9) are roller axle
It holds.
7. speed ratio control system according to claim 4, which is characterized in that the synchronizing wheel (8) and the shift fork (7)
Contact position is disposed as wear-resistant material.
8. speed ratio control system according to claim 4, which is characterized in that week is arranged in the outer peripheral surface of the synchronizing wheel (8)
To groove (81);The shift fork (7) includes the first annulus (71), and the inner end of first annulus (71) is embedded in the circumferential direction
Groove (81);When the shift fork (7) moves axially, the side wall of first annulus (71) pushes the circumferential recess (81)
Side wall.
9. speed ratio control system according to claim 8, which is characterized in that the shift fork (7) further includes the second annulus
(72), outer rim and the outer rim of first annulus (71) are wholely set;Circular pair of the inner end of second annulus (72)
The outer peripheral surface of the driving wheel driving wheel (11) and the driven wheel driving wheel (21) answered.
10. the speed ratio control method of speed ratio control system described in claim 1, which is characterized in that by turning for the motor shaft
Turn turns to the axial movement of the driving wheel driving wheel (11) and the driven wheel driving wheel (21), and by adjusting the motor shaft
Turnning circle and rotation direction change the axial movement distance of the driving wheel driving wheel (11) and the driven wheel driving wheel (21)
And direction, to realize the transformation of the stepless transmission speed ratio.
Priority Applications (1)
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CN201710980295.7A CN109681630A (en) | 2017-10-19 | 2017-10-19 | The speed ratio control system and speed ratio control method of stepless transmission |
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CN201710980295.7A CN109681630A (en) | 2017-10-19 | 2017-10-19 | The speed ratio control system and speed ratio control method of stepless transmission |
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Family
ID=66183500
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CN201710980295.7A Pending CN109681630A (en) | 2017-10-19 | 2017-10-19 | The speed ratio control system and speed ratio control method of stepless transmission |
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JP2002054706A (en) * | 2000-08-09 | 2002-02-20 | Asmo Co Ltd | Continuously variable transmission |
CN102003508A (en) * | 2010-11-24 | 2011-04-06 | 杨伟斌 | Motor actuation metal belt type continuously variable transmission (CVT) |
KR20120137737A (en) * | 2011-06-13 | 2012-12-24 | 권영웅 | Hand operated type continuously variable transmission |
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Application publication date: 20190426 |