KR101822237B1

KR101822237B1 - Automated manual transmission

Info

Publication number: KR101822237B1
Application number: KR1020150152979A
Authority: KR
Inventors: 어순기; 김현철; 김천옥; 임채홍
Original assignee: 현대자동차주식회사
Priority date: 2015-11-02
Filing date: 2015-11-02
Publication date: 2018-01-26
Also published as: KR20170051811A

Abstract

The present invention relates to an automatic manual transmission, which eliminates the problem of a shift disconnection felt by a driver during a shift in a multi-speed transmission having six or more stages, comprising: a first input shaft receiving rotational power of a power source via a main clutch; A second input shaft that is constantly provided with the rotational power of the power source; A counter shaft selectively connected to the second input shaft via an assist clutch; A transmission unit coupled to the first input shaft and a plurality of transmission gears having different gear ratios to the output shaft, respectively, for selecting transmission gears matching the traveling speed by a synchronizer; And an assist clutch which is connected to the second input shaft on a power transmission path leading to the counter shaft and the output shaft and which is arranged in a gear engagement structure to form an alternating two speed change stages, An automatic manual transmission including an automatic transmission is disclosed.

Description

[0001] AUTOMATED MANUAL TRANSMISSION [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic manual transmission, and more particularly, to an automatic manual transmission that eliminates the problem of shift disconnection felt by a driver during a shift in a multi-stage transmission having six or more stages.

An automatic manual transmission provides automatic transmission shifting by an actuator during the operation of the vehicle, thereby providing a driving convenience similar to that of an automatic transmission, and contributing to fuel efficiency improvement of the vehicle with superior power transmission efficiency than an automatic transmission.

Such an automatic manual transmission is a device that automatically shifts the transmission process by gear control through a TCU (Transmission Control Unit) instead of the driver by using a pneumatic actuator in a conventional manual transmission.

A brief description of an AMT (Automated Manual Transmission) system in which torque assisting is performed in a vehicle equipped with such an automatic manual transmission, a rotational force transmitted from the engine is selectively transmitted to the transmission through intermittence of the main clutch and the assist clutch, 4, 5, and R stages through the intermittent operation of the main clutch, and two stages can be formed through the intermittent operation of the assist clutch.

In other words, when the shift is made to the two-stage in the case of forming the one-stage or three-stage shift stage, the two-stage shift is performed through the torque cross control of the main clutch and the assist clutch. Therefore, Thereby preventing occurrence of a torque disconnection during shifting (similar to DCT double clutch shifting).

However, in the case of the conventional torque assist AMT system, the torque assist function can be performed only from the first stage to the third stage. In this case, when the shift is performed in the third or higher stage, there is no torque assist function, which may cause the driver to feel disconnection during shifting .

Particularly, when the speed change stage is extended to the 6th speed or 7th speed, there is a problem that the endless duty ratio which is applied to the third stage is reduced and there is a problem that the sense of disconnection during shifting at the third stage or more is further increased.

It should be understood that the foregoing description of the background art is merely for the purpose of promoting an understanding of the background of the present invention and is not to be construed as an admission that the prior art is known to those skilled in the art.

KR 10-2013-0115618 A

SUMMARY OF THE INVENTION The present invention has been made in order to solve the conventional problems as described above, and it is an object of the present invention to provide an automatic manual transmission that eliminates the problem of a shift disconnection felt by a driver during a shift even in a multi-

According to an aspect of the present invention, there is provided an internal combustion engine comprising: a first input shaft receiving rotational power of a power source via a main clutch; A second input shaft that is constantly provided with the rotational power of the power source; A counter shaft selectively connected to the second input shaft via an assist clutch; A transmission unit coupled to the first input shaft and a plurality of transmission gears having different gear ratios to the output shaft, respectively, for selecting transmission gears matching the traveling speed by a synchronizer; And an assist clutch which is connected to the second input shaft on a power transmission path leading to the counter shaft and the output shaft and which is arranged in a gear engagement structure to form an alternating two speed change stages, And a transmission means.

The two speed change stages formed by the assist shift means can be single-speed and four-speed shift.

The assist shifting means may include two-stage and four-stage transmission couplings meshed coupled to form a second-stage gear ratio and a fourth-gear ratio in the counter shaft and the output shaft.

The output shaft may include a first output shaft and a second output shaft disposed in parallel with the counter shaft, and the second and fourth speed transmission shafts may be coupled to the counter shaft, the first output shaft, and the second output shaft, respectively.

Wherein said assist shift means comprises three or more rotary elements, wherein the first rotary element is always operated as an input element, the second rotary element is connected to a counter shaft, and the third rotary element is selectively braked A planetary gear set operating as an element; And a 2 & 4 speed transmission coupling coupled to the counter shaft and the output shaft to form a 2 < st > or 4 < th > gear ratio according to the operation of the assist clutch or the friction member.

The assist clutch is provided between the second input shaft and the counter shaft; The friction member may be provided between the third rotary element and the transmission case.

The first rotary element is a sun gear which is directly connected to the second input shaft; The second rotary element is a carrier directly connected to the input gear of the 2 & 4-speed transmission provided in the counter shaft; The third rotating element may be a ring gear connected to the friction member.

The output shaft includes a first output shaft and a second output shaft disposed in parallel with the counter shaft, and the 2 & 4-speed transmission can be coupled to the counter shaft and the first output shaft or the second output shaft.

The assist transmission includes an idler gear set provided on a power transmission path transmitted from the second input shaft to a counter shaft and transmitting rotational power of a power source provided on a second input shaft to an output shaft; And a second-stage and fourth-stage gearbox coupling coupled to form a second-stage gear ratio and a fourth-gear ratio in the counter shaft and the output shaft.

Second and fourth gear input gears constituting said two-stage and four-stage transmission gear pairs are respectively provided on the counter shaft; The second and fourth stage input gears may be respectively coupled to any one of the output gears of the transmission unit so as to form a two-stage and four-stage transmission.

The counter shaft includes a first counter shaft connected to the idler gear set and a second counter shaft selectively connected to the first counter shaft via the assist clutch; And second and fourth input gears may be provided on the second counter shaft.

Wherein the counter shaft comprises a first counter shaft and a second counter shaft selectively connected to the first counter shaft via an assist clutch; The assist transmission includes an idler gear set provided on a power transmission path transmitted from the second input shaft to a counter shaft and transmitting rotational power of a power source provided on a second input shaft to an output shaft; Wherein the first rotary element is operated as an always-on input element, the second rotary element is connected to the second counter shaft, and the third rotary element is operated as an optional braking element by a friction member Planetary gear set; And a 2 & 4-speed transmission coupling coupled to the second counter shaft and the output shaft to form a second gear ratio or a fourth gear ratio according to the operation of the assist clutch or the friction member.

The first counter shaft is connected to an idler gear set; The assist clutch is provided between the first counter shaft and the second counter shaft; The friction member may be provided between the third rotary element and the transmission case.

The first rotary element is a sun gear directly connected to the first counter shaft; The second rotary element is a carrier directly connected to the input gear of the 2 & 4-speed transmission provided in the second counter shaft; The third rotating element may be a ring gear connected to the friction member.

The 2 & 4 " input gears constituting the 2 & 4 " The 2 & 4th stage input gear may be engaged with any one of the output gears of the transmission unit to form a 2 & 4th speed gearshift.

The counter shaft may be disposed on the side of the transmission unit.

According to the above-mentioned problem solving means, the torque assisting function is provided not only to the second stage but also to the fourth stage, so that the torque assist can be performed during the shift from the first stage to the second stage to the third stage to the fourth stage to the fifth stage. There is an effect of solving the problem of the shift discontinuity feeling that the driver can feel even if the vehicle is extended beyond the limit.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing the structure of a first embodiment of an automatic manual transmission according to the present invention; Fig.
2 is a diagram for explaining a process of shifting from the Nth stage to the first stage according to the present invention.
3 is a diagram for explaining a process of shifting from a first stage to a second stage according to the present invention.
4 is a diagram for explaining a process of shifting from a second stage to a third stage according to the present invention;
5 is a diagram for explaining a process of shifting from a third stage to a fourth stage according to the present invention.
6 is a diagram for explaining a process of shifting from a fourth stage to a fifth stage according to the present invention.
7 is a view showing the structure of a second embodiment of an automatic manual transmission according to the present invention.
8 is a view showing the structure of a third embodiment of an automatic manual transmission according to the present invention.
9 is a view showing the structure of a fourth embodiment of the automatic manual transmission according to the present invention.
10 is a view showing the structure of a fifth embodiment of the automatic manual transmission according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The automatic manual transmission of the present invention mainly includes a first input shaft INPUT1, a second input shaft INPUT2, a counter shaft CNT, an output shaft OUTPUT, a transmission unit 13, .

Referring to FIG. 1, the first input shaft INPUT1 may be selectively provided with a rotational power of a power source via a main clutch MCL.

Here, the power source may be the engine 11. The main clutch MCL includes not only a dry clutch but also a mechanical coupling device such as a torque converter, a fluid coupling, a power interrupter using a planetary gear, an electromagnetic clutch using an electric force, a spline or a dog clutch, It is possible to arrange all the elements for interrupting the power transmitted from the vehicle.

And the second input shaft INPUT2 can always receive the rotational power of the power source. At this time, the first input shaft INPUT1 is formed as a hollow shaft, and one end of the second input shaft INPUT2 may be inserted into the first input shaft INPUT1.

The counter shaft CNT may be selectively connected to the second input shaft INPUT2 via the assist clutch ACL. Here, the counter shaft CNT may be formed in the shape of a hollow shaft, and the other end of the second input shaft INPUT2 may be inserted into the counter shaft CNT.

When the main clutch MCL is provided at one end of the second input shaft INPUT2, the assist clutch ACL may be provided at the other end of the second input shaft INPUT2.

Here, the assist clutch includes a friction clutch, a synchromesh device, a dog clutch, a power interrupter (friction band, clutch, magnetic lever, etc.) using electric and hydraulic signals, and a latch Etc., and a device that completes the synchronization in a short mechanical time can be applied.

Next, the transmission unit 13 is configured such that a plurality of transmission gears having gear ratios different from each other are coupled to the first input shaft INPUT1 and the output shaft OUTPUT, and a transmission gear pair matching the traveling speed is selected by the synchronizer can do. At this time, the output shaft OUTPUT may include a first output shaft OUTPUT1 and a second output shaft OUTPUT2, and both the first output shaft OUTPUT1 and the second output shaft OUTPUT2 may be connected to the first input shaft INPUT1 ) So that a plurality of transmission gears and a synchronizing device can be disposed.

For example, transmission gears for forming first, third, and fifth gears may be coupled to the first input shaft INPUT1 and the first output shaft OUTPUT1, and the first input shaft INPUT1 and the second output shaft OUTPUT2 may be coupled to each other. And a synchronizer for selecting a transmission gear pair for the first input shaft INPUT1 or each output shaft OUTPUT may be provided.

A reverse idler shaft 15 is disposed in parallel to the second output shaft OUTPUT 2 and a reverse idler gear 17 is relatively rotated on the reverse idler shaft 15 to form a post diagnosis .

That is, when the main clutch MCL is engaged while the R gear is selected by the 6 & R stage synchronizer S6 & R, the power of the engine 11 is transmitted to the reverse idler gear 17 via the 1 & And transmitted from the reverse idler gear 17 to the second output shaft OUTPUT2 via the R gear to form a post diagnosis.

In addition, in the case of the above-described rear diagnosis, the structure can be changed as shown in FIG. 7 according to the arrangement of gears.

That is, when the main clutch MCL is engaged while the R gear is selected by the 6 & R stage synchronizer S6 & R, the power of the engine 11 is transmitted to the reverse idler gear 17 via the three- And is transmitted from the reverse idler gear 17 to the second output shaft OUTPUT2 via the R gear to form a post diagnosis.

Next, the assisting transmission means is connected in a gear engagement structure on the power transmission path leading from the second input shaft INPUT2 to the counter shaft CNT and the output shaft OUTPUT, It is possible to form two alternating gear stages among the lower-stage gear stages of the specific gear stage or lower.

For example, the two speed change stages formed by the assist shifting means may be single-stage and four-stage shifting.

That is, the second-stage gear ratio and the fourth-gear ratio can be selectively implemented according to the operation of the assist clutch ACL on the power transmission path leading from the counter shaft CNT to the output shaft OUTPUT.

Therefore, the present invention provides a torque assisting function not only in the second stage but also in the fourth stage so that the torque assist can be performed during the shift from the first stage to the second stage to the third stage as well as from the third stage to the fourth stage from the fifth stage to the fifth stage. It is possible to solve the problem of the shift discontinuity feeling that the driver can feel even if it is extended to six or more stages.

1 and 7 are views showing structures of first and second embodiments of the automatic manual transmission of the present invention.

Referring to the drawings, the assisted transmission means includes two-stage and four-stage transmission gears G2 and G4 meshed to form a second-stage gear ratio and a fourth-stage gear ratio on the counter shaft CNT and the output shaft OUTPUT .

The output shaft OUTPUT may include a first output shaft OUTPUT1 and a second output shaft OUTPUT2 disposed in parallel with the counter shaft CNT. The two-stage and four-stage transmission shafts G2 and G4 may be coupled to the counter shaft CNT, the first output shaft OUTPUT1, and the second output shaft OUTPUT2, respectively.

For example, a two-speed transmission may be coupled to the counter shaft CNT and the first output shaft OUTPUT1, and a four-speed transmission may be coupled to the counter shaft CNT and the second output shaft OUTPUT2. have. At this time, the two-stage input gear and the four-stage input gear may be fixed to the counter shaft (CNT), and the two-stage input gear and the four-stage input gear may be arranged by changing positions of the two-

8 is a view showing the structure of a third embodiment of the automatic manual transmission of the present invention.

Referring to the drawings, the assist shifting means may include a planetary gear set PG and a 2 & 4 speed transmission pair G2 & 4.

First, the planetary gear set PG is provided with three or more rotation elements, in which the first rotation element always functions as an input element, the second rotation element is connected to the counter shaft CNT, (B). &Lt; / RTI >

The 2 & 4-speed transmission shafts G2 & 4 are engaged with the counter shaft CNT and the output shaft OUTPUT to form a 2-stage gear ratio or 4-stage gear ratio according to the operation of the assist clutch ACL or the friction member B. have.

Here, the assist clutch (ACL) may be provided between the second input shaft INPUT2 and the counter shaft CNT, and the friction member B may be provided between the third rotary element and the transmission case CS have.

For example, the first rotary element may be a sun gear S directly connected to the second input shaft INPUT2, and the second rotary element may be an input gear of a 2 & 4-speed transmission G2 & And the third rotating element may be a ring gear R connected to the friction member B. [ At this time, the friction member B may be implemented as a clutch or a brake.

The output shaft OUTPUT may include a first output shaft OUTPUT1 and a second output shaft OUTPUT2 disposed in parallel to the counter shaft CNT. At this time, the 2 & 4th gearshift coupling G2 & And may be coupled to the counter shaft CNT and the first output shaft OUTPUT1 or the second output shaft OUTPUT2.

For example, the input gear of the 2 & 4th transmission gear pair G2 & 4 may be fixed to the counter shaft CNT and the output gear of 2 & 4th transmission gear pair G2 & 4 may be provided to be rotatable relative to the second output shaft OUTPUT2 have.

According to this configuration, when the assist clutch ACL is in the ON state and the friction member B is in the OFF state, the power transmitted from the engine 11 is operated in four stages via the 2 & The power of the engine 11 is decelerated and operated in two stages via the 2 & 4-speed transmission G2 & 4, so that the output shaft OUTPUT is transmitted to the output shaft OUTPUT, while when the assist clutch ACL is in the OFF state and the friction member B is in the ON state, (OUTPUT).

That is, the torque assist function at the first-stage to second-stage shift speed controls the main clutch MCL and the friction member B, controls the friction member B and the main clutch MCL at the second- , The main clutch MCL and the assist clutch ACL are controlled in the third-stage to fourth-gear shift, and the assist clutch ACL and the main clutch MCL are controlled in the fourth-stage to fifth- . However, the shifting from the fifth stage to the sixth stage can be performed only by the main clutch MCL.

9 is a view showing the structure of a fourth embodiment of the automatic manual transmission according to the present invention.

Referring to the drawings, the structures of the fourth embodiment and the fifth embodiment described later can be provided on separate shafts on the separate shafts to prevent the increase of the total length of the transmission, and preferably, (CNT) can be disposed on the side of the transmission unit 13.

To this end, the first input shaft INPUT1 may be fixed to the clutch disc constituting the main clutch MCL, and the clutch disc may be disposed between the engine 11 and the flywheel 25 and locked to the flywheel 25 . The intermittent operation of the clutch disc may be performed through the CSC 27 (or other power interrupter) disposed between the flywheel 25 and the transmission unit 13 described later.

The second input shaft INPUT2 may be connected to the flywheel 25 via a damper and the flywheel 25 may be fixed to the engine 11 and may be provided with constant rotational power from the engine 11. [

At this time, the second input shaft INPUT2 is formed as a hollow shaft, and the first input shaft INPUT1 can be inserted into the second input shaft INPUT2.

In addition, the assist shifting means may include an idler gear set and two-stage and four-stage speed reducers G2 and G4.

The idler gear set is provided on the power transmission path that is transmitted from the second input shaft INPUT2 to the counter shaft CNT and can transmit the rotational power of the power source provided on the second input shaft INPUT2 to the output shaft OUTPUT have.

The two-stage and four-stage transmission gears G2 and G4 may be meshed to form the second-stage gear ratio and the fourth-stage gear ratio on the counter shaft CNT and the output shaft OUTPUT.

For example, the two-stage and four-stage input gears constituting the two-stage and four-stage transmission gears G2 and G4 are respectively provided on the counter shaft CNT, And the output gears of the first and second gearboxes G2 and G4, respectively.

That is, although the two-stage input gear and the four-stage input gear are shown as being engaged with the output gear G6o for forming the six-stage and the output gear G5o for forming the five-stage, respectively, And may be engaged with another output gear that is directly connected.

The counter shaft includes a first counter shaft CNT1 connected to an idler gear set and a second counter shaft CNT2 selectively connected to the first counter shaft CNT1 via an assist clutch ACL . At this time, the second counter shaft CNT2 may be provided with two-stage and four-stage input gears.

The idler gear set may include a first transmission gear 19, a second transmission gear 21, an idler shaft 23 and an idler gear 25.

Specifically, the first transmission gear 19 may be fixed to the second input shaft INPUT2, and the second transmission gear 21 may be fixed to the first counter shaft CNT1. The idler shaft 23 may be disposed parallel to the second input shaft INPUT2 and the first counter shaft CNT1.

An idler gear 25 is provided on the idler shaft 23 so that the idler gear 25 can be engaged with the first transmission gear 19 and the second transmission gear 21 at this time.

That is, the rotational power of the engine 11 is provided to the first counter shaft CNT1 through the idler gear 25 engaged between the first transmission gear 19 and the second transmission gear 21, It is possible to output rotational power corresponding to the second and fourth stages through the two-stage input gear and the four-stage input gear provided on the second counter shaft CNT2 when the clutch ACL is on.

10 is a view showing the structure of a fifth embodiment of the automatic manual transmission according to the present invention.

Referring to the drawing, the counter shaft includes a first counter axis CNT1 and a second counter axis CNT2 selectively connected to the first counter axis CNT1 via an assist clutch (ACL) .

In particular, the assisting transmission means may include an idler gear set, a planetary gear set PG, and a 2 & 4 speed gear set G2 & 4.

The idler gear set is provided on the power transmission path that is transmitted from the second input shaft INPUT2 to the counter shaft CNT and can transmit the rotational power of the power source provided on the second input shaft INPUT2 to the output shaft OUTPUT. Here, the idler gear set has the same structure as that of the fourth embodiment, and a description thereof will be omitted.

The planetary gear set PG is provided with three or more rotation elements, in which the first rotation element is always operated as the input element, the second rotation element is connected to the second counter shaft CNT2, Can act as an optional braking element by the friction member (B).

The second and fourth transmission gears G2 and 4 are engaged with the second counter shaft CNT2 and the output shaft OUTPUT to form a second gear ratio or a fourth gear ratio according to the operation of the assist clutch ACL or the friction member B. can do.

Here, the first counter shaft CNT1 is connected to an idler gear set, and the assist clutch ACL is provided between the first counter shaft CNT1 and the second counter shaft CNT2, and the friction member B may be provided between the third rotary element and the transmission case CS.

For example, the first rotary element may be a sun gear S directly connected to the first counter shaft CNT1, and the second rotary element may be connected to the second counter gear CNT2 of the second & And the third rotary element may be a ring gear R connected to the friction member B. [

The second and fourth stage input gears may be provided on the second counter shaft CNT2 and the second and fourth stage input gears may be provided on any one of the output gears provided on the transmission unit 13, (G2 & 4). &Lt; / RTI >

That is, although the second and fourth stage input gears are shown engaged with the output gears G6o for forming six stages, they may be coupled to other output gears directly connected to the output shaft OUTPUT.

2 to 6 are views for explaining a shifting process based on the structure of the first embodiment of the automatic manual transmission of the present invention.

The second input shaft INPUT2 is directly connected to the engine 11 at the initial start of the vehicle and the counter shaft CNT is coupled with the second input shaft INPUT2 In this state, however, all the synchronizing devices and the assist clutches ACL in the transmission are in the neutral position, and the state in which no load is applied to the rotation of the engine 11 regardless of whether the main clutch MCL is on or off .

<N-stage → 1-speed transmission>

However, at the start of shifting to the first stage, the first-stage output gear is pre-coupled to the first output shaft OUTPUT1 using the 1 & 3rd stage synchronizer S1 & 3 before the main clutch MCL is engaged as shown in the left- .

When the clutch C is slowly engaged in this state, the rotational power of the engine 11 starts to be transmitted through the first input shaft INPUT1 as well as the right and left input gears G1 and Ri, Power is transmitted to the first output shaft OUTPUT1 through the first-stage counter gear pair G1c and the first-stage output gear, so that the vehicle can be driven in the forward first speed.

<1-step → 2-speed transmission>

Then, when the shift is started from the first stage to the second stage, the second stage output gear is preliminarily coupled to the first output shaft OUTPUT1 by using the 2 & 5 stage synchronizer (S2 &

In this state, by performing the torque intersection control for engaging the assist clutch ACL while releasing the main clutch MCL as shown on the right side of Fig. 3, the disengagement of the main clutch MCL and the engagement of the assist clutch ACL At the same time, it becomes smooth.

Then, the rotational power of the engine 11 is transmitted to the second output shaft OUTPUT1 via the second input shaft INPUT2 and the assist clutch ACL, and the power is transmitted to the first output shaft OUTPUT1, So that the shift can be progressed while preventing the phenomenon of a drop in the transmission feeling, which is likely to attract the vehicle during shifting, through the torque crossing control described above.

<2-step → 3-speed transmission>

Then, when the shift is started from the second stage to the third stage, the third stage output gear is preliminarily coupled to the first output shaft OUTPUT1 by using the 1 & 3 stage synchronizer S1 &

In this state, as shown in the right drawing of Fig. 4, the torque crossover control for coupling the main clutch MCL while releasing the assist clutch ACL is performed, whereby the release of the assist clutch ACL and the engagement of the main clutch MCL So that the shifting can be progressed while preventing the occurrence of the shift disconnection feeling as in the case of the preceding two-speed shifting.

<3-step → 4-speed transmission>

Subsequently, when the shift is started from the third stage to the fourth stage, the fourth-stage output gear is coupled to the second output shaft OUTPUT2 in advance by using the four-stage synchronous device S4 as shown in the left drawing of FIG.

In this state, by performing the torque crossing control for engaging the assist clutch ACL while disengaging the main clutch MCL as shown on the right side of Fig. 5, the disengagement of the main clutch MCL and the engagement of the assist clutch ACL So that the four-speed shifting can be performed while preventing the occurrence of shift disconnection.

<4-step → 5-speed transmission>

Then, when the shift is started from the fourth stage to the fifth stage, the fifth-stage output gear is pre-coupled to the first output shaft OUTPUT1 by using the 2 & 5 stage synchronizer (S2 &

In this state, by performing the torque intersection control for engaging the main clutch MCL while releasing the assist clutch ACL as shown in the right drawing of Fig. 6, the release of the assist clutch ACL and the engagement of the main clutch MCL So that the fifth-speed shifting can be performed while preventing the occurrence of shift disconnection, as in the case of the preceding four-speed shifting.

As described above, according to the present invention, not only two-speed but also four-speed torque assist function is provided so that torque assist is possible during the shift from the first speed stage to the second speed stage to the third speed stage and from the fourth speed stage to the fifth speed stage. It is possible to solve the problem of the shift discontinuity feeling that the driver can feel.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be construed as limited to the specific embodiments set forth herein; rather, .

11: engine 13: transmission unit
15: reverse idler shaft 17: reverse idler gear
19: first transmission gear 21: second transmission gear
23: idler shaft 25: idler gear
MCL: Main clutch ACL: assist clutch
INPUT1: first input shaft INPUT2: second input shaft
CNT: counter axis CNT1: first counter axis
CNT2: Second counter axis OUPPUT: Output shaft
OUTPUT1: first output shaft OUTPUT2: second output shaft
PG: planetary gear set B: friction member

Claims

delete

A first input shaft receiving rotational power of a power source via a main clutch;
A second input shaft that is constantly provided with the rotational power of the power source;
A counter shaft selectively connected to the second input shaft via an assist clutch;
A transmission unit coupled to the first input shaft and a plurality of transmission gears having different gear ratios to the output shaft, respectively, for selecting transmission gears matching the traveling speed by a synchronizer; And
And an output shaft connected to the counter shaft and the output shaft on the second input shaft in a gear engagement structure in a gear engagement structure to selectively shift the assist gearshift Means,
Wherein the assist shift means comprises:
Wherein the third rotary element is actuated by a friction member as an optional braking element, the third rotary element being actuated by a friction member as an optional braking element, set;
And a 2 & 4 & tilde & 4-speed transmission coupling coupled to the counter shaft and the output shaft to form a second gear ratio or a fourth gear ratio according to the operation of the assist clutch or the friction member.

The method of claim 5,
The assist clutch is provided between the second input shaft and the counter shaft;
And the friction member is provided between the third rotating element and the transmission case.

The method of claim 6,
The first rotary element is a sun gear which is directly connected to the second input shaft;
The second rotary element is a carrier directly connected to the input gear of the 2 & 4-speed transmission provided in the counter shaft;
And the third rotary element is a ring gear connected to the friction member.

The method of claim 7,
Wherein the output shaft includes a first output shaft and a second output shaft arranged in parallel to the counter shaft,
And the 2 & 4 < th > speed transmission is coupled to the counter shaft and the first output shaft or the second output shaft.

A first input shaft receiving rotational power of a power source via a main clutch;
A second input shaft that is constantly provided with the rotational power of the power source;
A counter shaft selectively connected to the second input shaft via an assist clutch;
A transmission unit coupled to the first input shaft and a plurality of transmission gears having different gear ratios to the output shaft, respectively, for selecting transmission gears matching the traveling speed by a synchronizer; And
And an output shaft connected to the counter shaft and the output shaft on the second input shaft in a gear engagement structure in a gear engagement structure to selectively shift the assist gearshift Means,
Wherein the assist shift means comprises:
An idler gear set provided on a power transmission path transmitted from the second input shaft to the counter shaft and transmitting rotational power of a power source provided on a second input shaft to an output shaft;
And a second-stage and fourth-stage transmission coupling coupled to form a second-stage gear ratio and a fourth-gear ratio in the counter shaft and the output shaft.

The method of claim 9,
Second and fourth gear input gears constituting said two-stage and four-stage transmission gear pairs are respectively provided on the counter shaft;
Wherein the second and fourth stage input gears are respectively coupled to output gears of the output gears of the transmission unit to form a pair of second and fourth gears.

The method of claim 10,
The counter shaft includes a first counter shaft connected to the idler gear set and a second counter shaft selectively connected to the first counter shaft via the assist clutch;
And second and fourth input gears are provided on the second counter shaft.

A first input shaft receiving rotational power of a power source via a main clutch;
A second input shaft that is constantly provided with the rotational power of the power source;
A counter shaft selectively connected to the second input shaft via an assist clutch;
A transmission unit coupled to the first input shaft and a plurality of transmission gears having different gear ratios to the output shaft, respectively, for selecting transmission gears matching the traveling speed by a synchronizer; And
And an output shaft connected to the counter shaft and the output shaft on the second input shaft in a gear engagement structure in a gear engagement structure to selectively shift the assist gearshift Means,
The counter-
A first counter shaft and a second counter shaft selectively connected to the first counter shaft via an assist clutch;
Wherein the assist shift means comprises:
An idler gear set provided on a power transmission path transmitted from the second input shaft to the counter shaft and transmitting rotational power of a power source provided on a second input shaft to an output shaft;
Wherein the first rotary element is operated as an always-on input element, the second rotary element is connected to the second counter shaft, and the third rotary element is operated as an optional braking element by a friction member Planetary gear set;
And a 2 & 4 & tilde & 4-speed gearbox coupled to the second counter shaft and the output shaft to form a second gear ratio or a fourth gear ratio according to the operation of the assist clutch or the friction member.

The method of claim 12,
The first counter shaft is connected to an idler gear set;
The assist clutch is provided between the first counter shaft and the second counter shaft;
And the friction member is provided between the third rotating element and the transmission case.

14. The method of claim 13,
The first rotary element is a sun gear directly connected to the first counter shaft;
The second rotary element is a carrier directly connected to the input gear of the 2 & 4-speed transmission provided in the second counter shaft;
And the third rotary element is a ring gear connected to the friction member.

The method of claim 12,
The 2 & 4 " input gears constituting the 2 & 4 "
Wherein the 2 & 4 & cir & input gears are meshed with any one of output gears of the transmission unit to form a 2 & 4-speed transmission.

The method according to claim 9 or 12,
And the counter shaft is disposed on a side of the transmission unit.