KR101786632B1 - Apparatus and method for controlling sync of double clutch transmission - Google Patents

Apparatus and method for controlling sync of double clutch transmission Download PDF

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Publication number
KR101786632B1
KR101786632B1 KR1020150176866A KR20150176866A KR101786632B1 KR 101786632 B1 KR101786632 B1 KR 101786632B1 KR 1020150176866 A KR1020150176866 A KR 1020150176866A KR 20150176866 A KR20150176866 A KR 20150176866A KR 101786632 B1 KR101786632 B1 KR 101786632B1
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South Korea
Prior art keywords
shift
point
start position
motor
finger
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KR1020150176866A
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Korean (ko)
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KR20170069535A (en
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박성진
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현대오트론 주식회사
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Publication of KR20170069535A publication Critical patent/KR20170069535A/en
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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
    • F16H61/04—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
    • 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
    • F16D23/04—Arrangements for synchronisation, also for power-operated clutches with an additional friction clutch
    • F16D23/06—Arrangements for synchronisation, also for power-operated clutches with an additional friction clutch and a blocking mechanism preventing the engagement of the main clutch prior to synchronisation
    • 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
    • F16H61/06—Smoothing ratio shift by controlling rate of change of fluid pressure
    • 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
    • F16H61/68—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 stepped gearings
    • F16H61/684—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 stepped gearings without interruption of drive
    • F16H61/688—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 stepped gearings without interruption of drive with two inputs, e.g. selection of one of two torque-flow paths by clutches

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Control Of Transmission Device (AREA)
  • Gear-Shifting Mechanisms (AREA)
  • Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)

Abstract

Disclosed is a synchronous control device and method for a double clutch transmission. The present invention relates to a shift lever device, a shift lever device, a shift lever device, a shift lever device, and a shift lever device, A motor driver for shifting and rotating the shift shaft and a shift actuator for shifting the shift rail assigned to the shift stage to be shifted among the plurality of shift rails, And a shift control unit for shifting and rotating the shift finger and discriminating and correcting the synchronization start position at which the shift finger makes contact with the shift rail assigned to the shift position, using the amount of current supplied to the motor driving unit.

Description

[0001] APPARATUS AND METHOD FOR CONTROLLING SYNC OF DOUBLE CLUTCH TRANSMISSION [0002]

The present invention relates to an apparatus and method for sink control, and more particularly, to a system and method for sink control of a double clutch transmission.

A double clutch transmission (or dual clutch transmission: DTC) means a transmission that includes two clutch mechanisms in an automatic transmission. The DTC has the advantage of speeding up the transmission speed and reducing the power loss due to the provision of two clutches.

The DCT is configured to selectively transmit the rotational force input from the engine to two input shafts using two clutches and to output to the two output shafts after shifting using the rotational force of the gears disposed on the two input shafts. Therefore, when the vehicle sequentially shifts, one of the two clutches transmits the power of the engine to the drive shaft, while the other clutch is prepared in preparation for the next shift, so fuel economy is improved and the shift speed is increased to reduce the acceleration time .

However, in order for the DCT to operate efficiently, it is important that a shift actuator that shifts the gear of the DTC driven by the motor is driven with synchronization (sync) exactly at the shift timing.

Fig. 1 shows the structure of a general shift actuator.

The shift actuator is connected to a motor (not shown) and a shift finger (sf) coupled to a rotating shift shaft (ss) is connected to a shift stage of a plurality of shift rails (sr) By performing the operation of pushing out the assigned shift rail, the gear corresponding to the shift rail sr is engaged to perform the gear shift.

Here, when the shift finger sf rotates while moving in the axial direction and pushes the shift rail sr assigned to the speed change stage to be shifted, the fixed and unlock cams cam are shifted in the direction in which the shift finger sr is not selected by the shift finger sr The shift rail sr is restored and fixed to the original position so that the previously engaged gear is disengaged.

Therefore, the shift actuator is a component that performs engagement and disengagement of the gear in the DCT, and is configured so that the shift actuator moves the shift finger to the position immediately before the position for pushing the shift rail (sr) corresponding to the corresponding shift position It has a great effect on the gear shift time.

However, the actual synchronous control starts the operation for shifting the gear at a position before the actual synchronous start position, in order to reduce the impact caused when the shift finger sh is hit to push the shift rail sr. However, at present, the shift time of the shift finger sf is not considered from the time of starting the gear shifting operation to the actual synchronization start position, and the time for gear engagement and disengagement is greatly increased, . This causes a problem that not only the shift speed is increased but also the fuel consumption is reduced.

Korean Laid-Open Patent No. 2014-0025147 (published on April 4, 2014)

An object of the present invention is to provide a synchronous control device for a double clutch transmission that can learn a synchronous start position of a shift actuator and increase a speed change speed of a double clutch transmission.

Another object of the present invention is to provide a synchronous control method for a double clutch transmission for achieving the above object.

According to an aspect of the present invention, there is provided an apparatus for synchronizing control of a double clutch transmission, including a shift shaft rotatably coupled to a shift finger and a plurality of fixed and disengaged cams, A shift actuator having a plurality of shift rails that move or return in a predefined direction by rotation to engage and disengage gears of the vehicle; A motor driver for moving and rotating the shift shaft; And a shifting finger for shifting the shifting finger by shifting the shifting finger by driving the motor driving unit to shift the shift rail assigned to the shifting end of the shift range among the plurality of shift rails, A shift control portion for discriminating and correcting a synchronous start position in contact with the shift rail allocated to the shift lever by using an amount of current supplied to the motor driver; .

Wherein the motor driving unit moves the shift finger in the axial direction of the shift shaft so that the shift finger is disposed at a position corresponding to one shift rail corresponding to a speed change end of the plurality of shift rails, And a shift motor for rotating the shifted finger; And a control unit.

Wherein the shift control unit detects and analyzes an amount of current consumed by the shift motor while the shift finger rotates to set a position of the shift finger at a time point when the amount of current is equal to or greater than a predetermined threshold current value as an expected synchronous start position, Setting a first point at a position spaced apart from a predicted synchronization start position by a first predetermined reference distance and setting a second point at a position spaced apart from the expected synchronization start position by a predetermined second reference distance thereafter .

Wherein the shift control unit calculates a predicted time required for the shift finger to move from the first point to the anticipated synchronization start position and outputs the shift finger to the first point designated from the first point to the second point, The shift motor is controlled to rotate for a time period to obtain a synchronization time from the first point to a time point at which the amount of current of the shift motor is equal to or greater than the threshold current value and an error distance is calculated from a time difference between the synchronization time and the expected time And the synchronization start position is corrected using the calculated error distance to acquire the synchronization start position.

Wherein the shift control unit changes the positions of the first and second points based on the acquired synchronization start position and moves the shift finger from the changed first point to the second point to obtain the error distance, And the synchronization start position is repeatedly corrected and stored.

Wherein if the time difference has a positive value, the shift control unit moves and sets a position of the first and second points to a previous position by the error distance, and if the time difference has a negative value, The position of the point is shifted to the subsequent position by the error distance and set.

And the shift control portion varies the position of the second point according to an engine torque of the vehicle.

According to an aspect of the present invention, there is provided a synchronous control method for a synchronous control system for a double clutch transmission including a shift actuator, a motor driver, and a shift control unit, Controls the drive motor unit so that the shift finger of the shift actuator moves and rotates to a position corresponding to one shift rail of the plurality of shift rails, detects and analyzes the amount of current consumed by the motor drive unit, ; The shift control section sets a first point at a position spaced apart from the predicted synchronous start position by a first reference distance that has been set beforehand and a second point ; Controlling the shift motor of the motor driving unit to rotate the shift finger for a first time designated by the second point from the first point to a point at which the amount of current of the shift motor is equal to or greater than a predetermined threshold current value Acquiring a synchronization time of the synchronization signal; And calculating an error distance from the difference between the synchronization time and a predicted time required for the shift finger to travel from the first point to the expected synchronization start position to obtain a synchronization start position; .

Wherein the step of setting the predictive synchronization start position comprises: driving a select motor of the motor driving unit to move the shift finger to a position corresponding to one of the plurality of shift rails; Driving the shift motor to rotate the shift finger; And detecting and analyzing an amount of current of the shift motor and setting a position of the shift finger at a time point when the amount of current is equal to or greater than the threshold current value as an expected synchronous start position; And a control unit.

Wherein acquiring the synchronization start position comprises: calculating the expected time; Calculating an error distance from a time difference between the synchronization time and the expected time; And correcting the expected synchronization start position using the error distance to obtain the synchronization start position; And a control unit.

The synchronization control method comprising: changing positions of first and second points based on the obtained synchronization start position; Moving the shift finger from the changed first point to the second point to obtain the error distance; And correcting and storing the synchronization start position according to the error distance; And further comprising:

Therefore, the synchronous control apparatus and method of the double clutch type transmission of the present invention confirms the synchronous start position at which the shift finger of the double clutch transmission physically pushes the shift rail to perform the engagement and disengagement of the gear, using the drive current of the motor And corrects the synchronization start position repeatedly by using the difference between the arrival time from the previously set position of the confirmed start point to the synchronization start position by the drive of the shift actuator and the estimated time so that the actual synchronization start position and time It can be accurately determined. Therefore, it is possible to reduce the engagement and disengagement time of the gear in the double clutch transmission, thereby greatly reducing the shift time and improving the fuel consumption. In addition, even when the shift finger or the shift rail is worn out for a long time, accurate synchronization can be provided.

Fig. 1 shows the structure of a general shift actuator.
2 shows a configuration of a synchronous control apparatus for a double clutch transmission according to an embodiment of the present invention.
Figs. 3 and 4 are diagrams for explaining the principle of the synchronous control device of the double clutch transmission according to the present invention discriminating the synchronization start point. Fig.
5 shows a synchronous control method of a double clutch transmission according to an embodiment of the present invention.

It is noted that the technical terms used herein are used only to describe specific embodiments and are not intended to limit the invention. It is also to be understood that the technical terms used herein are to be interpreted in a sense generally understood by a person skilled in the art to which the present invention belongs, Should not be construed to mean, or be interpreted in an excessively reduced sense. Further, when a technical term used herein is an erroneous technical term that does not accurately express the spirit of the present invention, it should be understood that technical terms that can be understood by a person skilled in the art are replaced. In addition, the general terms used in the present invention should be interpreted according to a predefined or prior context, and should not be construed as being excessively reduced.

Also, the singular forms "as used herein include plural referents unless the context clearly dictates otherwise. In the present application, the term "comprising" or "comprising" or the like should not be construed as necessarily including the various elements or steps described in the specification, Or may be further comprised of additional components or steps.

Further, the suffix "module" and "part" for components used in the present specification are given or mixed in consideration of ease of specification, and do not have their own meaning or role.

Furthermore, terms including ordinals such as first, second, etc. used in this specification can be used to describe various elements, but the elements should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like reference numerals refer to like or similar elements throughout the several views, and redundant description thereof will be omitted.

In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. It is to be noted that the accompanying drawings are only for the purpose of facilitating understanding of the present invention, and should not be construed as limiting the scope of the present invention with reference to the accompanying drawings.

FIG. 2 shows a configuration of a synchronous control device for a double clutch transmission according to an embodiment of the present invention, and FIGS. 3 and 4 illustrate a principle of a synchronous control device of a double clutch transmission according to the present invention, FIG.

2, the synchronous control apparatus for a double clutch type transmission according to the present invention includes a sensor unit 100, a speed change control unit 200, a motor driving unit 300, and a shift actuator 400.

The sensor unit 100 includes a plurality of sensors such as a throttle position sensor 110, a speed sensor 120 and an engine speed sensor 130 to generate a sensing signal, To the control unit (200).

The throttle position sensor 110 senses the opening angle of a throttle valve (not shown), the speed sensor 120 senses the speed of the vehicle, and the engine speed sensor 130 senses an input shaft Speed and acceleration of the vehicle.

The transmission control unit 200 determines whether the vehicle is in a gear shift state based on the opening angle detected by the throttle position sensor 110, the speed of the vehicle sensed by the speed sensor 120, and the speed of the input shaft sensed by the engine rotation speed sensor 130 . The shift control unit 200 controls the motor driving unit 300 to drive the shift motor 310 and the select motor 320 of the motor driving unit 300 when it is determined that gear shifting should be performed.

The motor driving unit 300 includes a shift motor 310 and a select motor 320 that are driven under the control of the shift control unit 200. The select motor 320 moves the shift finger sf in the direction of the shift shaft ss so that the shift finger sf is disposed at a position corresponding to one of the shift rails sr, 310 rotate the shift axis ss of the shift actuator 400. [

1, the shift actuator 400 includes a shift finger sf coupled to a shift shaft ss and a shift shaft ss, a fixed and released cam cam and a plurality of shift rails sr Respectively. The shift shaft ss is rotated by the shift motor 310 and moved in the axial direction by the selector motor 320. [ Therefore, the shift finger sf moves and rotates to push out the shift rail sr assigned to the shift stage to be shifted among the plurality of shift rails sr.

At this time, as shown in Fig. 1, the fixed and unlock cams (cam) that move and rotate with the shift fingers sf hold the unselected shift rails fixed in the initial position or return to the initial position.

Numbers 1 to 6 and symbol R on the side of each of the shift rails sr1 to sr4 in Fig. 3 mean a gear stage corresponding to each of the shift rails sr1 to sr4. That is, FIG. 3 shows the configuration of the shift actuator of the vehicle that provides the six-speed (1-6) shift with the reverse (R). Here, two numerals on both sides of the first, second, and fourth shift rails sr1, sr2, and sr4 indicate whether the shift rail is moved leftward or rightward due to rotation of the shift finger sf Since they are set to different speed ranges.

3, it is assumed that the shift fingers sf are moved by the select motor 320 to select the third shift rail sr3 among the first to fourth shift rails sr1 to sr4. Fig. 3 (a) shows a side sectional view of the shift actuator, and Fig. 3 (b) shows the shift actuator ss engaged with the shift shaft ss separately from the operation of the fixed and unlock cams . 6C is a top view of the shift actuator showing the starting point of synchronization at which the shift fingers sf and the fixed and unlock cams come into contact with the shift rail sr to push the shift rail sr.

3 and 4, the shift control unit 200 senses and analyzes the amount of current supplied to the shift motor 310 at the time of driving the shift motor 310 . 3B, the shift finger sf moved to the position corresponding to the third shift rail sr3 by the select motor 320 is rotated by the shift motor 310, When the synchronous start point comes into contact with the shift rail sr3, the load for pushing the second shift rail sr3 to the shift motor 310 increases, and the current consumption increases sharply.

That is, the current consumption of the shift motor 310 rapidly increases at the synchronous start position of the shift actuator. The shift control unit 200 for sensing and analyzing the amount of current supplied to the shift motor 310 determines the position of the shift finger sf at the time when the amount of current becomes equal to or greater than a preset threshold current value Ith, Set and save.

In addition, a first position (P1) is designated as a previous position by a predetermined first reference distance from a predicted synchronization start position, and a second position (P2) is designated as a position after a predetermined second reference distance from an expected synchronization start position do.

The first and second points P1 and P2 are positions set to take into account errors that may occur when the shift control unit 200 controls the shift motor 310 to shift the shift finger sf.

As described above, the shift control unit 200 controls the current supplied to the shift motor 310 to move the shift finger sf. However, even if the shift control unit 200 sets the shift distance of the shift finger sf to be 80 mm when the shift motor 310 supplies the current of 80 mA, for example, the actual shift finger sf moves to exactly 80 mm However, it moves with an error of about 80 mm ± 5 mm. That is, overshoot or undershoot occurs.

Therefore, if it is assumed that the distance from the current position of the shift finger sf to the expected synchronous start position is 100 mm, the shift control unit 200 does not directly supply the current of 100 mA to the shift motor 310, The first point P1 is set at the previous point by an error that is expected in consideration of the occurrence of the first point P1. For example, when an overshoot occurs about 5%, the first point P1 can be set at a distance of 95 mm from the current position of the shift finger sf. Consequently, the first point P1 is a position set in consideration of the overshoot so that the shift fingers sf do not move beyond the predicted synchronization start position. The second point P2 can be set at a distance of 105 mm from the current position of the shift finger sf in consideration of the undershoot as opposed to the first point P1.

That is, the first and second points P1 and P2 may be set in consideration of the undershoot and the overshoot error that may occur in the drive control of the shift motor 310 based on the predicted synchronization start position.

The shift control unit 200 controls the shift motor 310 to shift the position of the shift finger sf for a first predetermined time Ta from the first point P1 to the second point P2, Analyze. Then, the synchronization time Tb is obtained until the actual shift finger sf moves to the synchronization start position and the amount of current becomes equal to or greater than the threshold current value Ith.

When the synchronization time Tb is obtained, the shift control unit 200 determines that the shift finger fs is shifted from the acquired synchronization time Tb to the synchronization start position at the first point P1, (Pdiff) using the time difference of the time difference Tn. The transmission control unit 200 can easily obtain the error distance Pdiff from the rotational speed and the time difference of the shift finger sf.

The shift control unit 200 sets the positions of the first and second points P1 and P2 forward by the error distance Pdiff from the currently set position when the time difference is calculated as a positive value, The position of the first and second points P1 and P2 is set backward by the error distance Pdiff from the currently set position to correct the expected synchronization start position error. Then, the corrected estimated synchronization start position is set and stored as the synchronization start position. However, it is very difficult for the shift control section 200 to set the time difference to a predetermined reference time difference Tref (for example, 0.1 second) because it is very difficult for the time difference between the synchronization time Tb and the expected time Tn to be exactly zero. The positions of the first and second points P1 and P2 may not be moved. If the time difference exceeds the reference time difference Tref, the positions of the first and second points P1 and P2 are set earlier by the error distance Pdiff, and if the time difference is less than the negative reference time difference -Tref , And the positions of the first and second points P1 and P2 can be set to be equal to or longer than the error distance Pdiff.

On the other hand, in FIG. 4, the slope of the line connecting the first point P1 and the second point P2 is a speed at which the shift finger sf is moved. Accordingly, when the tilt is large, the shift finger sf moves at a high speed to the synchronization start point, and when the tilt is small, the shift finger ff moves slowly to the synchronization start point. If the engine torque is very high, the driver will not feel a great shock from the vehicle even if the shift finger moves fast and reaches the sink point. However, if the shift finger (sf) moves at a very low speed (for example, 10 Km / h or less) or in the course of braking, the driver can relatively detect the shift shock of the vehicle.

Therefore, the slope, which is the moving speed of the current shift finger sf, is determined by correcting the stored map in which the slope corresponding to the engine torque sensed by the engine speed sensor 130 is previously stored in the shift control unit 200. [ The second point P2 is determined not by designating the position after the second reference distance as the second reference point P2 from the anticipated synchronization start position but by the slope according to the engine torque and the first predetermined time Ta . In this case, if a slope is designated together with the first point P1, a position that is expected to reach after the first predetermined time Ta can be designated as the second point P2.

In FIG. 4, two positions at which the amount of current consumed by the shift motor 310 increases in accordance with the movement of the shift finger sf are shown. This is a phenomenon in which the load temporarily increases at the initial stage of driving the shift motor 310 at the first point P1. When the shift control unit 200 sets the initial expected synchronous start position or determines the synchronous start position thereafter In the case where the synchronous start error is corrected, the amount of current may be excluded even if the amount of current is equal to or greater than the threshold current value Ith at the beginning of the drive of the shift motor 310. [

The shift control unit 200 then detects the amount of current required by the shift motor 310 based on the stored synchronization start position and analyzes and corrects the error of the synchronization start position. That is, the learning is repeatedly performed so that the transmission control unit 200 can always store an accurate synchronization start position.

5 shows a synchronous control method of a double clutch transmission according to an embodiment of the present invention.

Referring to FIGS. 2 to 4, the synchronous control method of the double clutch transmission according to the present invention will be described. The transmission control unit 200 of the synchronous control apparatus sets an expected synchronous start position (S11). The shift control unit 200 drives the shift motor 310 to sense and analyze current consumption of the shift motor 310 while rotating the shift finger sf coupled to the shift shaft ss, And sets the position of the shift finger sf at the time when the amount of current consumed by the shift finger sf becomes equal to or greater than a preset threshold current value Ith as the expected synchronous start position.

When the expected synchronous start position is set, the shift control unit 200 sets the first and second points P1 and P2 (S12). The transmission control unit 200 sets the first point P1 at a position spaced apart from the predicted synchronization start position by the previous first reference distance and then sets the second point P2 at the position spaced apart by the second reference distance Can be set. However, the second point P2 may be set based on the driving speed of the shift motor 310 and the position of the first point P1 determined by the shift control unit 200 according to the engine torque.

When the first and second points P1 and P2 are set, the shift control unit 200 controls the shift motor 310 to move the shift finger sf to the first point P1 (S13). The shift motor 310 is controlled so that the shift finger sf located at the first point P1 moves during the first predetermined time Ta to the second point P2 at step S14.

The shift control unit 200 analyzes the amount of current of the shift motor 310 while the shift finger sf moves and determines whether the amount of current becomes equal to or greater than the threshold current value Ith at step S14.

If the amount of current of the shift motor 310 is equal to or greater than the threshold current value Ith and the amount of current of the shift motor 310 is equal to or greater than the threshold current value Ith (Step S16). In step S16, it is determined whether or not the time difference between the time Tn until the shift finger fs and the time Tn expected to take the shift finger sf to move to the anticipated synchronization start position has a positive value. If it is determined that the time difference has a positive value, the shift control unit 200 sets the positions of the first and second points P1 and P2 to the previous distance by an error distance Pdiff corresponding to the time difference (S17). However, if the time difference is not a positive value, it is discriminated whether it has a negative value (S18). If it is determined that the time difference has a negative value, the transmission control unit 200 sets the positions of the first and second points P1 and P2 to an error distance Pdiff corresponding to the time difference thereafter (S19). On the other hand, when the time difference becomes 0, the positions of the first and second points P1 and P2 are not changed.

As a result, the synchronous control method of the double clutch type transmission according to the present invention can determine an accurate synchronous start position and can predict the exact time at which the shift finger sf moves to the synchronous start position by driving the shift motor 310 , So that the shift can be started at a necessary synchronization start time.

The method according to the present invention can be implemented as a computer-readable code on a computer-readable recording medium. A computer-readable recording medium includes all kinds of recording apparatuses in which data that can be read by a computer system is stored. Examples of the recording medium include a ROM, a RAM, a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like, and a carrier wave (for example, transmission via the Internet). The computer-readable recording medium may also be distributed over a networked computer system so that computer readable code can be stored and executed in a distributed manner.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art.

Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

Claims (11)

A plurality of shift fingers and a plurality of fixed and released cams coupled to rotate and a plurality of shift fingers that move or return in a predetermined direction by rotation of the shift fingers and the plurality of fixed and disengaged cams, A shift actuator having a shift rail;
A motor driver for moving and rotating the shift shaft; And
The shifting finger is moved and rotated by driving the motor driving unit to determine whether or not the vehicle is shifting and to move the shift rail assigned to the shift range to be shifted among the plurality of shift rails, A shift control unit for determining and correcting a synchronization start position, which is in contact with the shift rail allocated to the shift control unit,
/ RTI >
The motor drive unit includes:
A select motor for shifting the shift finger in the axial direction of the shift shaft so that the shift finger is disposed at a position corresponding to one shift rail corresponding to a gear stage to be shifted among the plurality of shift rails; And
A shift motor for rotating the shifted finger
Lt; / RTI >
The shift control unit senses and analyzes an amount of current consumed by the shift motor during the rotation of the shift finger to detect the position of the shift finger at a time when the amount of current consumed by the shift motor is equal to or greater than a predetermined threshold current value, Sets a first point at a position separated by a first predetermined reference distance from the predicted synchronization start position and sets a second point at a position separated by a predetermined second reference distance from the predicted synchronization start position Setting,
Wherein the shift control unit calculates an expected time required for the shift finger to move from the first point to the anticipated synchronization start position and sets the shift finger from the first point to the second point Controlling the motor driving unit to rotate for a first time to acquire a synchronization time from the first point to a time point at which the amount of current is equal to or greater than the threshold current value and calculate an error distance from the time difference between the synchronization time and the expected time And the synchronization start position is corrected using the calculated error distance to obtain the synchronization start position. delete delete delete 2. The shift control device according to claim 1,
Changing the position of the first and second points based on the obtained synchronization start position, moving the shift finger from the changed first point to the second point to obtain the error distance, And the correction value is repeatedly corrected and stored. 6. The shift control device according to claim 5,
If the time difference has a positive value, moves the positions of the first and second points to the previous position by the error distance and sets the positions of the first and second points when the time difference has a negative value And moves to an after-mentioned position by the error distance. 7. The shift control device according to claim 6,
And the position of the second point is varied according to the engine torque of the vehicle. A synchronous control method for a synchronous control apparatus for a double clutch transmission including a shift actuator, a motor drive section, and a shift control section,
The shift control unit controls the motor driving unit so that the shift finger of the shift actuator moves and rotates to a position corresponding to one shift rail of the plurality of shift rails, detects and analyzes the amount of current consumed by the motor driving unit, Setting a start position;
The shift control section sets a first point at a position spaced apart from the predicted synchronous start position by a first reference distance that has been set beforehand and a second point ;
Controlling the shift motor of the motor driving unit to rotate the shift finger for a first time designated by the second point from the first point to a point at which the amount of current of the shift motor is equal to or greater than a predetermined threshold current value Acquiring a synchronization time of the synchronization signal; And
Calculating an error distance from the difference between the synchronization time and an expected time required for the shift finger to move from the first point to the expected synchronization start position to obtain a synchronization start position; And a synchronous control method of the double clutch transmission. The method of claim 8, wherein the step of setting the expected synchronization start position comprises:
Driving a select motor of the motor driving unit to move the shift finger to a position corresponding to one of the plurality of shift rails;
Driving the shift motor to rotate the shift finger; And
Detecting and analyzing a current amount of the shift motor and setting a position of the shift finger at a time point when the amount of current is equal to or greater than the threshold current value as an expected synchronous start position; And the second clutch is engaged with the second clutch. 9. The method of claim 8, wherein obtaining the synchronization start position comprises:
Calculating the expected time;
Calculating an error distance from a time difference between the synchronization time and the expected time; And
Obtaining the synchronization start position by correcting the expected synchronization start position using the error distance; And the second clutch is engaged with the second clutch. 11. The method of claim 10,
Changing positions of the first and second points based on the obtained synchronization start position;
Moving the shift finger from the changed first point to the second point to obtain the error distance; And
Correcting and storing the synchronization start position according to the error distance; Further comprising the steps of:
KR1020150176866A 2015-12-11 2015-12-11 Apparatus and method for controlling sync of double clutch transmission KR101786632B1 (en)

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