KR20170074533A - Apparatus for synchronizing of transmission - Google Patents

Apparatus for synchronizing of transmission Download PDF

Info

Publication number
KR20170074533A
KR20170074533A KR1020150183924A KR20150183924A KR20170074533A KR 20170074533 A KR20170074533 A KR 20170074533A KR 1020150183924 A KR1020150183924 A KR 1020150183924A KR 20150183924 A KR20150183924 A KR 20150183924A KR 20170074533 A KR20170074533 A KR 20170074533A
Authority
KR
South Korea
Prior art keywords
gear
shaft
output
counter
input
Prior art date
Application number
KR1020150183924A
Other languages
Korean (ko)
Inventor
이성호
Original Assignee
현대다이모스(주)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 현대다이모스(주) filed Critical 현대다이모스(주)
Priority to KR1020150183924A priority Critical patent/KR20170074533A/en
Publication of KR20170074533A publication Critical patent/KR20170074533A/en

Links

Images

Classifications

    • 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
    • F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
    • F16H3/02—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion
    • F16H3/20—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially using gears that can be moved out of gear
    • F16H3/38—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially using gears that can be moved out of gear with synchro-meshing
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D23/00—Details of mechanically-actuated clutches not specific for one distinct type
    • F16D23/02—Arrangements for synchronisation, also for power-operated clutches
    • 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
    • F16H57/00—General details of gearing
    • F16H57/0006—Vibration-damping or noise reducing means specially adapted for gearings
    • 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
    • F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
    • F16H59/14—Inputs being a function of torque or torque demand
    • 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
    • F16H61/04—Smoothing ratio shift
    • F16H61/0403—Synchronisation before shifting
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structure Of Transmissions (AREA)

Abstract

A motor 10 is connected to a reverse idle gear 4 and is connected to an output shaft 3, a counter shaft 2 and an input shaft 1 A first rotation speed detection sensor 30, a second rotation speed detection sensor 40 and a third rotation speed detection sensor 50 are installed. The control unit 20 can control the operation of the motor 10 to synchronize the input gears 1a and 1b and the output gears 3a and 3b to the input shaft 1 and the output shaft 3 respectively.

Description

[0001] Apparatus for synchronizing of transmission [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synchronizing device for a transmission, and more particularly, to a synchronizing device for a transmission that synchronizes a shaft and a gear at the time of shifting.

The transmission is a device for appropriately adjusting the number of revolutions and torque of the rotational power generated by the engine according to the running state of the vehicle, and the shifting is achieved by changing the gear ratio used for power transmission.

Therefore, a plurality of gears are provided inside the transmission to configure a multi-stage gear ratio.

Depending on how the gears are engaged, they are divided into a perturbation gear type, a constant bite type, and a synchronous type.

1 shows an example of a synchronized type manual transmission. Input gears 1a and 1b are provided in the input shaft 1 and output gears 3a and 3b and 3c are provided in the output shaft 3. Input gears 1a and 1b are provided in the counter shaft 2, And counter gears 2a, 2b, 2c, 2d, and 2e that are engaged with the output gears 3a, 3b, and 3c are provided.

One gear of the output gears 3a, 3b and 3c is not engaged directly with the corresponding counter gear 2e as the reverse gear 3c but is engaged with the counter gear 2e via the reverse idle gear 4 Lt; / RTI > That is, the reverse idle gear 4 is provided between the reverse gear 3c and the counter gear 2e.

1, since the reverse idle gear 4 is normally not shown in the cross-sectional view on the installation position, the reverse idle gear 4 is actually displayed on the lower side of the rear counter gear 2e as shown in FIG. 3c and the counter gear 2e (this is the same in the present invention to be described later).

The input gears 1a and 1b and the output gears 3a and 3b and 3c are installed so as to be freely rotatable with respect to respective shafts, that is, the input shaft 1 and the output shaft 3, 2b, 2c, 2d, and 2e are fixed to the counter shaft 2 and are always rotated integrally with the counter shaft 2. [

The input shaft 1 and the output shaft 3 are connected to the input shaft 1 and the output shaft 3 in order to synchronize and lock the input gears 1a and 1b and the output gears 3a and 3b and 3c, Synchronizers (5a, 5b, 5c) are provided between the gears.

The synchronizer 5a provided between the two side input gears 1a and 1b synchronizes and restrains any one of the input gears 1a and 1b to the input shaft 1 and the synchronizer 5a is provided between the two output gears 3a and 3b The synchronizer 5b synchronizes and restrains any one of the two output gears 3a and 3b to the output shaft 3 and the synchronizer 5c provided on one side of the output gear 3c used for reverse gear is synchronized with the output shaft 3, Thereby synchronizing and restraining the output gear 3c to the output shaft 3.

An example of a conventional technique for synchronizing and restraining a shaft and a gear using the synchronizer as described above is disclosed in Korean Patent Laid-Open Publication No. 2009-0112861.

As described above, the conventional transmission has to install a plurality of synchronizers in order to synchronize and lock the input gear and the output gear to the input shaft and the output shaft.

The synchronizer includes a plurality of components such as a hub, a plurality of keys, a synchronizer ring, a sleeve, and a clutch gear integrally mounted on the synchronizing object gear, as well as the mutual correspondence surfaces of the synchronizer ring and the clutch gear are formed into the same cone shape Because it had to be precisely machined, it was difficult to manufacture.

In addition, although both side surfaces of the synchronizer ring and the clutch gear are gradually contacted during synchronous operation, portions having different rotational speeds are in contact with each other.

Accordingly, it is an object of the present invention to provide a synchronizing device for a transmission, which simplifies the structure of the synchronizer and prevents shock and noise during shifting.

According to an aspect of the present invention, there is provided an input shaft and an output shaft, wherein a plurality of input gears and output gears are rotatably installed, respectively, and counter gears, which are engaged with the input gear and the output gear, And a reverse idle gear is provided between a reverse gear of the output gear and a counter gear corresponding to the reverse gear. The transmission includes a motor connected to the reverse idle gear, And a control unit for synchronously rotating the input gear and the output gear to the input shaft and the output shaft via the idle gear and the counter gear, respectively.

The present invention may include a first rotation speed sensor for detecting the rotation speed of the output shaft and transmitting the rotation speed to the control unit, a second rotation speed sensor for sensing the rotation speed of the counter shaft and transmitting the rotation speed to the control unit, And a third rotational speed sensing sensor for sensing the rotational speed and transmitting the sensed rotational speed to the control unit.

The control unit controls the motor so that a braking torque for decelerating the counter shaft is generated by supplying a reverse current to the motor when shifting from a low stage to a high stage.

The control unit supplies a forward current to the motor when shifting from a high stage to a low stage to control the motor so as to generate a speed-increasing torque that accelerates the counter shaft.

In the control unit, gear ratios of the input gear and the output gear, which are gear pairs of respective gear positions, and the counter gears respectively engaged with the input gear and the output gear are input. When the rotational speed of the counter shaft is known, the rotational speeds of the input gear and the output gear are known have.

According to the present invention as described above, the counter gear is provided with a synchronizing device of a new configuration for rotating the input gear and the output gear to synchronize the input gear and the output gear to the corresponding shaft.

Therefore, there is no need for the synchronizer to perform the synchronizing action, so that there is no need to form the cone surface corresponding to the synchronizer ring and the clutch gear of the synchronizer.

Therefore, the configuration of the synchronizer is simplified and the manufacturing is facilitated.

Also, according to the present invention, the synchronizer performs only a function of fixing the gear to the shaft in a state in which the gear and the shaft are completely synchronized.

Therefore, when the synchronizer is operated, the two parts rotating at different speeds do not come into contact with each other as in the conventional art, so that shock and noise due to the synchronous operation are not generated and the transmission feeling is improved.

In addition, since the synchronizer performs only the restraint without synchronizing, it is possible to replace the synchronizer with a restraining mechanism having a simpler structure such as a dog clutch, so that the structure of the transmission can be simplified.

1 is a cross-sectional view of a transmission incorporating a synchronizing device according to the prior art;
2 is a right side schematic view of the reverse idle gear installation portion in Fig.
3 is a cross-sectional view of a transmission to which a synchronizing device according to the present invention is applied;
Fig. 4 is a schematic view showing the configuration of the present invention as a correspondence of Fig. 2; Fig.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. The thicknesses of the lines and the sizes of the components shown in the accompanying drawings may be exaggerated for clarity and convenience of explanation.

In addition, the terms described below are defined in consideration of the functions of the present invention, and these may vary depending on the intention of the user, the operator, or the precedent. Therefore, definitions of these terms should be made based on the contents throughout this specification.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 3 is a cross-sectional view of a transmission to which a synchronizing device according to the present invention is applied, and FIG. 4 is a schematic diagram showing the configuration of the present invention as a corresponding diagram of FIG. 2. (Parts identical to those in FIGS. .

3 and 4, the input shaft 1 is provided with input gears 1a and 1b, the output shaft 3 is provided with output gears 3a, 3b and 3c, and the counter shaft 2c are provided with counter gears 2a, 2b, 2c, 2d, 2e which are engaged with the input gears 1a, 1b and the output gears 3a, 3b, 3c.

One gear of the output gears 3a, 3b and 3c is not engaged directly with the corresponding counter gear 2e as the reverse gear 3c but is engaged with the counter gear 2e via the reverse idle gear 4 Lt; / RTI > That is, the reverse idle gear 4 is provided between the reverse gear 3c and the counter gear 2e.

The reverse idle gear 4 is normally not shown in the sectional view on the mounting position. Therefore, the rear idle gear 4 is shown below the rear counter gear 2e as shown in FIG. 3, but actually, 3c and the counter gear 2e.

The input gears 1a and 1b and the output gears 3a and 3b and 3c are installed so as to be freely rotatable with respect to respective shafts, that is, the input shaft 1 and the output shaft 3, 2b, 2c, 2d, and 2e are fixed to the counter shaft 2 and are always rotated integrally with the counter shaft 2. [

The input shaft 1 and the input shaft 1 are connected to the input shaft 1 and the output shaft 3 in order to synchronize and lock the input gears 1a and 1b and the output gears 3a, The output shaft 3 is provided with synchronizers 5a, 5b and 5c between the gears.

The synchronizer 5a provided between the two side input gears 1a and 1b synchronizes and restrains any one of the input gears 1a and 1b to the input shaft 1 and the synchronizer 5a is provided between the two output gears 3a and 3b The synchronizer 5b synchronizes and restrains any one of the two output gears 3a and 3b to the output shaft 3 and the synchronizer 5c provided at one side of the output gear, Operates only in the reverse direction to synchronize and lock the reverse gear 3c to the output shaft 3. [

The synchronizer of the transmission according to the present invention is a transmission having the above-described structure, wherein the motor 10 connected to the reverse idle gear 4 and the output gears 3a and 3b are controlled by controlling the operation of the motor 10, And a control unit (40) for synchronizing the output shaft (3) with the output shaft (3).

The motor 10 is a motor whose current supply is controlled by the control unit 40 so that the amount of generated torque is controlled. As will be described later, the motor 10 is used to increase or decrease the rotation speed of the counter shaft 2 in the same direction through the reverse idle gear 4 and the counter gear 2e meshed therewith.

The rotation axis of the motor 10 is coupled (not shown) to the center axis of the reverse idle gear 4.

A case of the transmission is provided with a first rotational speed sensor 30 for detecting the rotational speed of the output shaft 3 and a second rotational speed sensor 40 for detecting the rotational speed of the counter shaft 2 do.

The first rotation speed sensor 30 and the second rotation speed sensor 40 transmit the respective measured values to the control unit 20. (Actually, in the sensors, a sensing signal is generated and transmitted to the control unit 20) analyzes and calculates the number of revolutions, it is explained that the number of revolutions is directly measured by the sensor for the convenience of explanation and understanding.

Meanwhile, the control unit 20 may control the operation of the motor 10 to synchronize the rotation of the input shaft 1 and the input gears 1a and 1b installed therein.

To this end, a third rotational speed sensor 50 for detecting the rotational speed of the input shaft 1 is installed at one side of the transmission case.

The third rotation speed sensor 50 detects the rotation speed of the input shaft 1 and transmits the rotation speed to the control unit 20.

The control unit 20 is provided with the input gears 1a and 1b and the output gears 3a and 3b and the counter gears 2a, 2b, 2c, and 2d, respectively, The gear ratio is input.

It is therefore possible to know at what speed the counter shaft 2 must be rotated to synchronize the input gears 1a and 2a and the output gears 3a and 3b to the input shaft 1 and the output shaft 3, respectively.

That is, since the control unit 20 knows the rotation speeds of the input shaft 1 and the output shaft 3 through the third rotation speed sensor 50 and the first rotation speed sensor 30, So that the input gear and the output gear to be shifted can be synchronized with the input shaft 1 and the output shaft 3, respectively. At this time, since the rotation speed of the counter shaft 2 is grasped in real time through the second rotation speed sensor 40, the control unit 20 controls the rotation speed of the counter shaft 2 through the supply current control of the motor 10 You can control it as you like.

The control unit 20 can synchronize the input gears 1a and 1b and the output gears 3a and 3b to the input shaft 1 and the output shaft 3 through the control of the motor 10,

On the other hand, the shift can be divided into a case of changing from low to high (= upshift) and a case of changing from high to downshift (= downshift).

In the case of the high-speed shifting, the output shaft 3 rotates to a low-speed state before shifting, and the output gear of a single number to be shifted rotates at a relatively high speed relative to the output shaft 3, And to be fixed to the output shaft 3 after deceleration to a predetermined speed.

In this case, the output gear needs to be decelerated. Therefore, the number of rotations of the counter shaft 2 must be reduced in order to reduce the number of revolutions of the counter gear meshed therewith. Accordingly, So that the motor 10 maintains the rotation direction but generates the braking force in the direction opposite to the rotation direction. That is, the rotation of the counter shaft 2 is reduced by allowing the motor 10 to serve as a kind of brake. Since the gear ratio of the counter gear and the output gear is known and the number of rotations of the output shaft 3 and the counter shaft 2 is sensed in real time, the output gears of the output shaft 3, The braking force by the motor 10 is controlled. Then, when the number of revolutions of the output gear and the output shaft 3 coincide with each other, the motor 10 controls the current so that the braking force is no longer generated.

On the other hand, in the case of the downshift, the output shaft 3 rotates in the high speed state before the speed change and the single output gear to be shifted rotates at a relatively low speed as compared with the output shaft 3, It must be fixed to the output shaft 3 after the speed increase.

Therefore, a forward current is applied to the motor 10, and an additional rotational force is applied to the counter shaft 2 through the reverse idle gear 4 so that the counter shaft 2 can be accelerated. When the number of revolutions of the output gear and the output shaft 3, which are to be shifted, is equal to the number of revolutions of the output gear and the output shaft to be shifted, the current is controlled so that no further torque is generated in the motor 10 to accelerate the counter shaft 2.

After the number of revolutions of the output gear and the output shaft 3 is matched as described above, the synchronizer is operated to fix the shift target output gear to the output shaft 3. At this time, since the output gear and the output shaft (3) have already been synchronized, the synchronizer does not need to be synchronized. Therefore, the synchronizer ring and the gear shaft of the clutch gear do not need to be synchronized. Therefore, the configuration of the synchronizer is simplified, and the configuration of the transmission can be simplified.

The synchronization between the output gear and the output shaft 3 has been described. However, the synchronization of the input gear and the input shaft 1 can also be achieved by controlling the operation of the motor 10 in the same manner as described above. Therefore, a detailed description thereof will be omitted.

On the other hand, since the reverse shift is performed while the vehicle is stopped, the reverse gear 3c and the output shaft 3 are naturally synchronized with each other in a stationary state. Therefore, there is no need to adjust the speed of the reverse gear 3c, and there is no need to control the operation of the motor 10 to adjust the rotational speed of the counter shaft 2. [ At this time, the reverse idle gear 4 does not serve to transmit the power (or braking force) of the motor 10 to the counter shaft 2, but merely performs the function of merely reversing the rotating direction of the reverse gear 3c .

As described above, according to the present invention, the operation of the motor connected to the reverse idle gear is controlled to rotate the input gear and the output gear through the counter shaft and the counter gear to synchronize the input gear and the output gear to the corresponding shaft, Device is provided.

Therefore, as described above, it is not necessary to form a cone-shaped surface in the synchronizer ring and the clutch gear of the synchronizer by simply fixing the input gear and the output gear to the corresponding shaft without performing the synchronizing action.

Therefore, the configuration of the synchronizer is simplified and the manufacturing is facilitated.

According to the present invention, since the synchronizer is already synchronized with the synchronizer and the two parts rotating at different speeds are not in contact with each other, shock and noise are not generated during shifting, and the shifting feeling is improved.

In addition, since the synchronizer performs only the restraint without synchronizing, it is possible to replace the synchronizer with a restraining mechanism having a simpler structure such as a dog clutch, so that the structure of the transmission can be simplified.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It is understandable. Accordingly, the true scope of the present invention should be determined by the following claims.

1: Input shaft 1a, 1b: Input shaft
2: Counter shafts 2a, 2b, 2c, 2d, 2e:
3: Output shaft 3a, 3b: Output gear
3c: reverse gear 4: reverse idle gear
10: motor 20: control unit
30: first rotation speed sensor 40: second rotation speed sensor
50: Third rotation speed sensor

Claims (5)

Wherein a plurality of input gears and output gears are rotatably mounted on the input shaft and the output shaft, respectively, and counter gears, which are engaged with the input gear and the output gear, are integrally installed on the counter shaft, And a reverse idle gear is provided between the counter gears corresponding to the counter gears,
A motor connected to the reverse idle gear, and a control unit controlling the operation of the motor to rotate the input gear and the output gear synchronously with the input shaft and the output shaft via the reverse idle gear and the counter gear, respectively Of the transmission. The method according to claim 1,
A first rotation speed sensor for detecting the rotation speed of the output shaft and transmitting the rotation speed to the control unit, a second rotation speed sensor for detecting the rotation speed of the counter shaft and transmitting the rotation speed to the control unit, And a third rotational speed sensor for detecting the rotational speed of the transmission unit and transmitting the detected rotational speed to the control unit. The method according to claim 1,
Wherein the control unit controls the motor so that a braking torque for decelerating the counter shaft is generated by supplying a reverse current to the motor when shifting from a low stage to a high stage. The method according to claim 1,
Wherein the control unit controls the motor so that a forward current is supplied to the motor when shifting from a high stage to a low stage so that a speed-increasing torque for increasing the speed of the counter shaft is generated in the motor. The method according to claim 1,
The gear ratio of the input gear and the output gear and the counter gear respectively engaged with the input gear and the output gear constituting the gear pair of the respective gear positions is input to the control unit. When the rotational speed of the counter shaft is known, And the synchronizing device of the transmission.
KR1020150183924A 2015-12-22 2015-12-22 Apparatus for synchronizing of transmission KR20170074533A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150183924A KR20170074533A (en) 2015-12-22 2015-12-22 Apparatus for synchronizing of transmission

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150183924A KR20170074533A (en) 2015-12-22 2015-12-22 Apparatus for synchronizing of transmission

Publications (1)

Publication Number Publication Date
KR20170074533A true KR20170074533A (en) 2017-06-30

Family

ID=59279827

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020150183924A KR20170074533A (en) 2015-12-22 2015-12-22 Apparatus for synchronizing of transmission

Country Status (1)

Country Link
KR (1) KR20170074533A (en)

Similar Documents

Publication Publication Date Title
JP5849770B2 (en) Four-wheel drive vehicle and control device for four-wheel drive vehicle
JP6051676B2 (en) Four-wheel drive vehicle control system
US6193629B1 (en) Shifting mechanism
WO2018123392A1 (en) Power transmission control device
JP2012187962A (en) Vehicle control device
BR102018013968A2 (en) STRENGTH TRANSMISSION SYSTEM AND CONTROL METHOD OF THE FORCE TRANSMISSION SYSTEM
KR20100089221A (en) Method for controlling transmission of dual clutch transmission of vehicle
KR20110105636A (en) Apparatus for shift controlling of dual clutch transmission in vehicle and method thereof
SE540245C2 (en) A method for gear shifting in a gearbox, a gearbox and a vehicle
KR20170074533A (en) Apparatus for synchronizing of transmission
JP2008513704A (en) Starting the automatic gearbox starting gear
JP5155205B2 (en) Gearbox synchronizer
WO2016099379A1 (en) A gear shifting device for a range gear in a gearbox
JP2018066413A (en) Control device of transmission
US10746263B2 (en) Automatic transmission with electric synchronization
KR20110001327A (en) Continuously variable transmission
KR101006592B1 (en) Tractor Transmission with Electronic Brake
KR100597351B1 (en) FR type manual transmission
JP6729355B2 (en) Power transmission control device
KR101724934B1 (en) Transmission for vehicle
JP2001324011A (en) N-r operating force reducing device for manual transmission
WO2018124218A1 (en) Power transmission control device
CN105008771A (en) Vehicle transmission
JPS6058047B2 (en) Direct transmission automatic synchronization device
JP2005133909A (en) Controller of gear type transmission

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E601 Decision to refuse application