KR101637280B1 - Power transmission apparatus for hybrid electric vehicle - Google Patents

Abstract

A vehicular transmission is disclosed. An automotive transmission according to an embodiment of the present invention includes an engine having an engine output gear as a power source; The rotational power transmitted from the engine is transmitted or accelerated by the planetary gear set to selectively transmit the rotational power from the engine via a synchronizer to a pair of hall means transmission gears disposed without rotation interference on the input means of the hall means to implement four odd gear stages An odd-numbered-way shifting portion; The rotational power transmitted from the engine is transmitted or accelerated by the planetary gear set to selectively transmit the rotational power from the engine to the pair of the even-numbered transmission gears disposed on the even-numbered input shaft without rotating interference, through the synchronizer to implement four even- An even-numbered shifting portion to be shifted; An output unit which is disposed between the hall unit shift portion and the even-numbered shift portion and outputs rotational power, which is shifted in accordance with the gear ratio, to the differential in a state in which the hole means and the even-numbered portion transmission are connected to the external gear; And a reverse mechanism that is provided between any one of the planetary gear sets of the above-mentioned one of the planetary gear sets of the odd-numbered planetary gear set and the even-numbered planetary gear set and the output unit to enable reverse travel.

Description

TECHNICAL FIELD [0001] The present invention relates to a shift device for a vehicle,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicular transmission, and more particularly, to a vehicular transmission capable of implementing eight fixed transmission stages using two synchronizers and two planetary gear sets.

Eco-friendly technology in vehicles is a core technology with survival of the future automobile industry, and car makers are concentrating on developing environment-friendly vehicles to achieve environmental and fuel efficiency regulations.

The future type of automobile technology can be exemplified by Electric Vehicle (EV), Hybrid Electric Vehicle (HEV), Double Clutch Transmission (DCT) and the like, which are improved in efficiency and convenience .

The DCT according to the present invention has two clutch mechanisms in the automatic transmission and a gear train of a basic manual transmission and selectively outputs the rotational force input from the engine to two input shafts using two clutches And shifts the gear train using the gear train before outputting.

In DCT, a variety of layouts have been attempted in order to compactly realize a high-speed transmission having five or more stages, and by controlling two clutches and synchronizing devices by the controller, a manual shifting of the driver is unnecessary AMT (Auto Manual Transmission).

As a result, DCT has superior power transmission efficiency as compared with planetary gear type automatic transmission, and it is easy to change and add parts according to multi-shoe because it can meet the importance of fuel efficiency regulation and multi-shoe efficiency. It is in the limelight.

In the embodiment of the present invention, two planetary gear sets are added to the DCT structure that implements the fourth-speed fixed-speed gear stage using two synchronizers, so that the eight-speed fixed-speed gear can be implemented, Which is capable of improving the vehicle speed.

Further, in the embodiment of the present invention, two synchronizers and two planetary gear sets are applied to realize one forward speed and eight reverse speeds, thereby reducing the number of parts and simplifying the internal structure and minimizing the weight of the vehicle. .

In one or more embodiments of the present invention, an engine having an engine output gear as a power source; The rotational power transmitted from the engine is transmitted or accelerated by the planetary gear set to selectively transmit the rotational power from the engine via a synchronizer to a pair of hall means transmission gears disposed without rotation interference on the input means of the hall means to implement four odd gear stages An odd-numbered-way shifting portion; The rotational power transmitted from the engine is transmitted or accelerated by the planetary gear set to selectively transmit the rotational power from the engine to the pair of the even-numbered transmission gears disposed on the even-numbered input shaft without rotating interference, through the synchronizer to implement four even- An even-numbered shifting portion to be shifted; An output unit which is disposed between the hall unit shift portion and the even-numbered shift portion and outputs rotational power, which is shifted in accordance with the gear ratio, to the differential in a state in which the hole means and the even-numbered portion transmission are connected to the external gear; And a reverse mechanism provided between any one of the planetary gear sets of the odd-numbered planetary gear set of the odd-numbered shifting portion and the even-numbered shifting portion and configured to allow the reverse travel to be established between the planetary gear set and the output portion.

Further, the above and other objects, features and advantages of the present invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings in which: FIG. A first input shaft and a second input shaft, the second input shaft being selectively connected to the first input shaft through a first clutch; A third input shaft connected selectively to the first input shaft of the first means through a second clutch; And the rotational force transmitted from the third input shaft of the first means is transmitted to the first input shaft of the second means, 2 < / RTI > A pair of Hall element means transmissions arranged on the second input shaft of the Hall element without rotational interference and having different gear teeth; And an odd-numbered synchronizer selectively synchronously connecting the pair of the first-mentioned input and output shafts with the second input-output shaft.

The first input shaft is disposed parallel to the engine rear side in the axial direction. The first input shaft is circumferentially engaged with the engine output gear. The first input shaft is disposed on the same axis as the first input shaft, and the first input shaft is selectively connected to the first input shaft through the first clutch, and the third input shaft is a hollow shaft, So as to be selectively connected to the first input shaft of the first means via the second means of the second means.

The planetary gear set is constituted by a single pinion planetary gear set. The sun gear is integrally connected to the second input shaft, the planetary carrier is integrally connected to the third input shaft of the hole means, Can be selectively connected to the transmission housing via the brakes.

Further, the reverse mechanism includes a reverse brake configured between the planetary carrier of the planetary gear set of the planetary gear unit and the transmission housing; And a reverse input gear which is disposed on the second input shaft without rotating intervention and is directly connected to the ring gear of the Hall apparatus planetary gear set and is connected to the reverse output gear of the output section via an external gear.

Further, the pair of the Hall-effect transmission gears may include a first-fifth speed change gear that implements the first and fifth speeds; And a third / seventh speed change gear that implements the third and seventh speeds.

In addition, the hole means synchronizer includes a first-fifth speed-change gear that implements the first speed and the fifth speed, and a third / seventh speed-change gear that implements the third speed and the seventh speed, Lt; / RTI >

Further, the even-numbered shifting portion includes an even-numbered first input shaft connected to the engine output gear and an external gear; A second input shaft that is selectively connected to the first input shaft through an even-numbered first clutch; A third input shaft that is selectively connected to the first input shaft of the even-numbered means through a second-element second clutch; And the rotational power transmitted from the third input shaft of the even-numbered means is increased, and the rotational power transmitted from the first-mentioned third-order input shaft is increased, 2 < / RTI > input shaft; A pair of even-numbered gearshifts disposed on the second input shaft without rotation interference and having different gear teeth; And a pair of synchronizer means for synchronously selectively connecting the pair of first and second input means with the second means input means.

In addition, the first input shaft of the even-numbered means is arranged in parallel in the axial direction from the rear side of the engine, and the even-numbered input gear is fixedly arranged on the front side to circumferentially engage with the engine output gear. Wherein the first input shaft and the second input shaft are integrally connected to each other via a first input shaft and a second input shaft, And can be selectively connected to the first input shaft of the even-numbered means via the second-element second clutch.

In addition, the even-numbered planetary gear set is composed of a single-pinion planetary gear set, the sun gear is integrally connected to the even-numbered second input shaft, the planetary carrier is integrally connected to the even- Can be selectively connected to the transmission housing via the brakes.

Further, the pair of second-gear transmission may include a second / sixth speed change gear that implements a second speed and a sixth speed; And a fourth / eighth speed gearshift implementing the fourth and eighth speeds.

Also, the two-way synchronizer includes a second / sixth speed change gear that implements the second speed and the sixth speed, and a fourth / eighth speed change gear that implements the fourth speed and the eighth speed, Lt; / RTI >

Further, the output section may include a counter shaft disposed in parallel in the axial direction between the even-numbered-side shifting section and the even-numbered shifting section; A first counter gear fixedly disposed on the counter shaft and matingly engaging with one of the pair of transmission gears on the odd-numbered-way transmitting portion and the even-numbered shifting portion; And a second counter gear which is fixedly arranged on the rear side of the counter shaft and spaced apart from the first counter gear by a predetermined distance and which is not circumferentially engaged with the first counter gear among the pair of transmission gears on the first and second counter gears A second counter gear circumscribing the transmission gear of the second counter gear; And a final output gear which is fixed to one end of the counter shaft and transfers rotational power of the counter shaft to the final reduction gear.

The output unit may further include a reverse output gear fixedly disposed on one side of the counter shaft and circumferentially engaged with the reverse input gear.

In the embodiment of the present invention, by using two synchronizers, two planetary gear sets are added to the DCT structure having the fourth-speed fixed speed change stage to implement the eight-speed fixed speed change stage, thereby realizing multi- There is an effect of improvement.

In addition, by adopting two synchronizers and two planetary gear sets, it is possible to realize 8 forward speeds and 1 reverse speeds, thereby simplifying the internal structure and minimizing the overall length and weight by reducing parts.

In addition, at the time of shifting operation, there is an effect that the shift means does not generate a shift disconnection feeling by causing the two means of the pair of clutches to alternate between the hole means and the even means.

1 is a schematic diagram of a transmission according to a first embodiment of the present invention.
2 is a shift operation table of the transmission according to the first embodiment of the present invention.

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

In order to clearly illustrate the embodiments of the present invention, parts that are not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the entire specification.

In the following description, the names of the components are denoted by the first, second, etc. in order to distinguish them from each other because the names of the components are the same and are not necessarily limited to the order.

1 is a schematic diagram of a transmission according to an embodiment of the present invention.

1, the transmission according to the embodiment of the present invention includes an engine ENG as a power source, an odd-numbered transmission portion T1 for shifting the rotational power transmitted from the engine ENG to four odd- And an even-numbered speed change section T2 for shifting the rotational power transmitted from the engine ENG to four even-numbered gear stages; And an output unit (OP) for outputting power and a reverse mechanism.

Various known engines such as a gasoline engine or a diesel engine using conventional fossil fuels may be applied to the engine ENG as the power source, and an engine output gear (EDG) is installed at the output side.

The first and second input shafts IS1-1, IS1-2, IS1-3, the first and second clutches CL1-1, CL1-2, CL1-2, a planetary gear set PG1, a pair of pinion gears D1 / 5 (D3 / 7), and an alternator SLE1.

The first input shaft IS1-1 is disposed in parallel with the axial direction of the engine ENG at the rear side of the engine ENG and the hole input gear G1 is fixedly disposed at the front side thereof, EDG), and always rotates when the engine ENG is driven.

The second input shaft IS1-2 is arranged coaxially on the rear side of the first input shaft IS1-1 and is connected to the first input shaft IS1-1 of the first input shaft IS1-1. CL1-1).

The third input shaft IS1-3 is a hollow shaft and disposed on the outer circumferential side of the second input shaft IS1-2 without interfering with rotation. The first input shaft IS1-3 And is selectively connected through the Hall element second clutch CL1-2.

The planetary gear set PG1 is a single pinion planetary gear set and includes a sun gear S1, a planetary carrier PC1 that rotatably supports a pinion P1 that is engaged externally with the sun gear S1, And a ring gear R1 meshing with the ring gear R1.

The planetary gear set PG1 is connected directly to the second means input shaft IS1-2 of the planetary gear set S1 and the planetary carrier PC1 is connected to the third means input shaft IS1-3, And the ring gear R1 is selectively connected to the transmission housing H via the hole means brake BK1.

Accordingly, when the rotational power of the engine ENG is input through the first-stage first-speed-drive clutch CL1-1 and the second-stage second-stage input shaft IS1-2, 2 and the third input shaft IS1-3, the hole means brake BK1 is actuated and transmitted to the second means input shaft IS1-2 at an increased speed.

The pair of the first and second speed change gearers are disposed at a rear portion of the second input shaft IS1-2 to include first to fifth speed change gears D1 / 5 for implementing first and fifth speeds, And a third / seventh speed change gear mechanism (D3 / 7) for implementing the third speed and the seventh speed.

Here, the first-fifth speed change gear unit D1 / 5 and the third / seventh speed change gear unit D3 / 7 each have different speed change stages that are implemented according to the input through the odd-numbered planetary gear set PG1 And actually consists of the same gear.

The hall unit synchronizer SL1 is provided between the first-fifth speed change gear unit D1 / 5 and the third / seventh speed change speed gear unit D3 / 7 on the hall unit second input shaft IS1-2 And selectively connects the first-fifth speed change gear unit D1 / 5 and the third / seventh speed change gear unit D3 / 7 to the second means input shaft IS1-2.

Since the Hall device synchronizer SL1 has a known configuration, a detailed description thereof will be omitted. The sleeve SLE1 applied to the Hall device synchronizer SL1 has a separate actuator , The actuator performs the shift while being controlled by the transmission control unit.

The even-numbered shifting portion T2 includes first, second and third input shafts IS2-1, IS2-2, IS2-3, first and second clutch CL2-1 CL2-2, an even-numbered planetary gear set PG2, a pair of even-numbered transmission gears D2 / 6 (D4 / 8), and an even-numbered synchronizer SLE2.

The even-numbered first input shaft IS2-1 is disposed in parallel with the axial direction of the engine ENG at the rear side of the engine ENG, and the even-numbered input gear G2 is fixedly disposed at the front side thereof, EDG), and it always rotates when the engine is driven.

The second input shaft IS2-2 is disposed coaxially on the rear side of the first input shaft IS2-1 and is connected to the first input shaft IS2-1 of the even- CL2-1).

The third input shaft IS2-3 is a hollow shaft and is disposed on the outer circumferential side of the second input shaft IS2-2 without interfering with rotation, And is selectively connected through the even-numbered second clutch CL2-2.

The planetary gear set PG2 is a single pinion planetary gear set which includes a sun gear S2, a planetary carrier PC2 that rotatably supports a pinion P2 that is externally engaged with the sun gear S2, And a ring gear R2 meshing with the ring gear R2.

The planetary gear set PG2 is connected directly to the second-stage input shaft IS2-2 and the planetary carrier PC2 is coupled to the third-stage input shaft IS2-3, And the ring gear R2 is selectively connected to the transmission housing H via the even-numbered brake BK2.

Thus, when the rotational power of the engine ENG is inputted through the first-speed-first clutch CL2-1 and the second input shaft IS2-2, the rotational power of the engine ENG is transmitted as input, Is input through the second clutch CL2-2 and the third input shaft IS2-3, the even-numbered brake BK2 is activated and transmitted to the even-numbered second input shaft IS2-2.

The pair of even-numbered transmission gears are arranged on the rear side of the even-numbered second input shaft IS2-2 to include a second / sixth-speed gearshift D2 / 6 for implementing the second and sixth gears, And a fourth / eighth speed change gear (D4 / 8) for implementing the fourth and eighth gears.

The second / sixth speed change gear unit D2 / 6 and the fourth / eighth speed change gear unit D4 / 8 each have a gear stage implemented according to the input via the even-numbered planetary gear set PG2, And actually consists of the same gear.

The synchronizer SL2 is provided between the second / sixth speed-change gear mechanism D2 / 6 on the even-numbered second input shaft IS2-2 and the fourth / eighth speed- And selectively connects the second / sixth speed-change gear mechanism (D2 / 6) and the fourth / eighth speed-change gear mechanism (D4 / 8) to the second means input shaft IS2-2.

Since the even-numbered synchronizer SL2 has a known configuration, a detailed description thereof will be omitted. The sleeve SLE2 applied to the even-numbered synchronizer SL2 has a separate actuator , The actuator performs the shift while being controlled by the transmission control unit.

The output unit OP includes a counter shaft CS, first and second counter gears CG1 and CG2, and a final output gear OG.

The counter shaft CS is arranged in parallel between the hole means and the even-numbered second input shaft IS1-2 (IS2-2), and the first counter gear CG1 is disposed on the counter shaft CS And the second counter gear CG2 is connected to the first counter gear (D1 / 5) and the second / sixth speed-change gear (D2 / 6) Depending on the gear ratios of the gears that are circumferentially engaged and engaged with the third / seventh speed change gear D3 / 7 and the fourth / eighth speed change gear D4 / 8 at the same time in a state of being fixed on the other side on the axis CS A shift is made.

The final output gear OG is disposed on the front side of the counter shaft CS and transmits rotational power transmitted from the counter shaft CS to the differential gear DIFF via the longitudinal reduction gear FD.

In addition, in the above-described transmission, a reverse mechanism is required. In the above-described transmission, a hole means and an even-numbered planetary gear set PG1 (PG2) are applied. It is possible to implement the operation.

FIG. 1 shows an example in which the reverse mechanism is applied to the planetary gear set PG1.

1, the planetary carrier PC1 of the planetary gear set PG1 is selectively connected to the transmission housing H via the reverse brake BK3, And the reverse input gear RIG is connected directly to the countershaft CS so that the reverse input gear RIG is connected directly to the reverse input gear RIG disposed on the second input shaft IS1-2 without rotational intervention, (ROG) formed integrally with the rear output gear (ROG).

FIG. 2 is a shift operation table of the transmission according to the embodiment of the present invention.

[apse]

First, in the reverse shift stage REV, the first-stage clutch CL1-1 and the reverse-stage brake B3 are operated in a state in which the sleeve SEL1 of the first-stage synchronizer SL1 is kept neutral .

Then, the rotational power of the engine ENG is transmitted through the engine output gear EDG, the hall input gear G1, the hall unit first input shaft IS1-1, the hall unit first clutch CL1-1, 2 through the input shaft IS1-2, the sun gear S1, the ring gear R1, the reverse input gear RIG, the reverse output gear ROG, the counter shaft CS and the final output gear OG. (FD) and differential (DIFF)).

[Advancing first gen]

In the forward first speed (D1), the first-fifth speed change gear mechanism (D1 / 5) and the second means input shaft IS2 are connected via the sleeve SEL1 of the first means synchronizer SL1, When the first clutch CL1-1 is operated and controlled, the first speed change is made.

Then, the rotational power of the engine ENG is transmitted to the engine output gear EDG, the hole means input gear G1, the hole means first input shaft IS1-1, the hole means first clutch CL1-1, Deceleration gear FD via the two input shafts IS1-2, the first-fifth speed-change gear D1 / 5, the first counter gear CG1, the counter shaft CS and the final output gear OG. (DIFF), and forward 1-speed (D1) travel is performed.

After completion of the forward 1-speed shifting as described above, the second / sixth speed change gear D2 / 6 and the even-numbered speed reducer D2 / 6 via the sleeve SEL2 of the even- 2 input shaft (IS2-2).

[Advancing second gen]

When the vehicle speed is to be increased to the second speed in the state of the first speed, the operation of the first means clutch CL1-1 of the first means is released in the first speed state and the operation of the first means clutch CL2- 1).

Then, the second / sixth speed change gear D2 / 6 and the even-numbered second input shaft IS2-2 are driven by the sleeve SEL2 of the even-numbered synchronizer SL2, which is operated in the preliminary operation in the forward first speed state, The rotational power of the engine ENG is naturally transmitted to the engine output gear EDG, the even-numbered input gear G2, the even-numbered first input shaft IS2-1, The second input shaft IS2-2, the second / sixth speed change gear D2 / 6, the first counter gear CG1, the counter shaft CS, and the final output gear OG. (FD) and differential (DIFF)), and forward second-speed (D2) travel is performed.

After completion of the forward second speed change, the third / seventh speed change gear D3 / 7 and the third speed change gear D3 / 7 are transmitted through the sleeve SLE1 of the first speed synchronizer SL1 for the next forward third speed change, 2 synchronize the input shaft (IS1-2).

[Three steps forward]

When the vehicle speed is to be increased to the third speed in the state of the second speed, the operation of the first-stage clutch CL2-1 is canceled in the second forward speed state, and the first-stage clutch CL1- 1).

Then, the third / seventh speed change gear D3 / 7 and the second means input shaft IS1-2 are driven by the sleeve SEL1 of the hall device synchronizer SL1 operated in the preliminary operation in the forward second speed state, The rotational power of the engine ENG is naturally transmitted to the engine output gear EDG, the hole input gear G1, the hole first input shaft IS1-1, the hole first clutch CL1-1, The second reduction gear G2 is connected via the second input shaft IS1-2, the third / seventh speed change gear D3 / 7, the second counter gear CG2, the counter shaft CS and the final output gear OG. (D3) in the forward third speed (FD) and the differential (DIFF).

After completion of the forward third-speed shifting as described above, the fourth / 8th speed-change gear D4 / 8 and the even-numbered speed reducer D4 / 8 via the sleeve SEL2 of the even- 2 input shaft (IS2-2).

[Advance 4th gen]

When the vehicle speed is to be increased to the fourth speed in the state of the third speed, the operation of the first means clutch CL1-1 is released in the third speed state and the operation of the even-numbered first clutch CL2- 1).

Then, the fourth / eighth speed change gear D4 / 8 and the even-numbered second input shaft IS2-2 are driven via the sleeve SEL2 of the one-way synchronizer SL2 operated in the preliminary operation in the forward third speed state, The rotational power of the engine ENG is naturally transmitted to the engine output gear EDG, the even-numbered input gear G2, the even-numbered first input shaft IS2-1, the even- Through the second output shaft IS2-2, the fourth / eighth speed change gear D4 / 8, the second counter gear CG2, the counter shaft CS, and the final output gear OG, Gear (FD) and differential (DIFF)), and forward 4-speed (D4) travel.

After completion of the forward fourth-speed shift, as described above, for the next forward 5-speed shift, through the sleeve SLE1 of the hall device synchronizer SL1, the first-fifth speed change gear unit D1 / 2 input shaft (IS1-1).

[Five steps forward]

When the vehicle speed is to increase to the fifth speed in the state of the fourth speed, the operation of the even-numbered first clutch CL2-1 is canceled in the fourth speed state, and the operation of the odd-numbered second clutch CL1- 2 and the Hall device brake BK1.

Then, the first-fifth speed change gear unit D1 / 5 and the second-speed second input shaft IS1-2 are driven via the sleeve SEL1 of the hall unit synchronizer SL1 operated in the preliminary operation in the forward fourth speed state, The rotational power of the engine ENG is naturally transmitted to the engine output gear EDG, the hole means input gear G1, the hole means first input shaft IS1-1, the hole means second clutch CL1-2 The first planetary carrier PC1, the sun gear S1, the second means input shaft IS1-2, the first-fifth speed change gear unit D1 / 5, the first counter gear CG1, , The final reduction gear (FD) and the differential gear (DIFF)) via the final output gear (OG), and the forward fifth speed (D5) travel is performed.

That is, in the forward first speed (D1), the planetary gear set PG1 has no influence on the shift speed, but in the forward fifth speed (D5), the ring gear R1 is fixed by the operation of the hole means brake BK1 Element, and the planetary carrier PC1 operates as an input element, whereby the accelerating output is generated through the sun gear S1, thereby achieving five forward speeds.

After completion of the forward 5-speed shift, the second / sixth speed change gear D2 / 6 and the even-numbered speed reducer D2 / 6 via the sleeve SEL2 of the even- 2 input shaft (IS2-2).

[6 steps forward]

When it is desired to increase the vehicle speed in the state of the fifth speed to shift to the sixth speed, in the state of the fifth speed, the operation of the second means clutch CL1-2 and the hole means brake BK1 is released, Means The second clutch CL2-2 and the even-numbered brake BK2 are actuated.

Then, the second / sixth speed change gear unit D2 / 6 and the even-numbered second input shaft IS2-2 are driven via the sleeve SEL2 of the even-numbered synchronizer SL2 operated in the preliminary operation in the fifth forward speed state, The rotational power of the engine ENG is naturally transmitted to the engine output gear EDG, the even-numbered input gear G2, the even-numbered first input shaft IS2-1, the even- The planetary carrier PC2, the sun gear S2, the even-numbered second input shaft IS2-2, the second / sixth-speed gearshift D2 / 6, the first counter gear CG1, , The final reduction gear (FD) and the differential gear (DIFF) through the final output gear (OG)), and the forward sixth gear (D6) is performed.

That is, in the forward second speed (D2), the even-numbered planetary gear set PG2 has no influence on the shift speed, but in the forward sixth speed (D6), the ring gear R2 is fixed Element, and the planetary carrier PC2 operates as an input element, so that the forward speed can be realized by increasing speed through the sun gear S2.

After completion of the forward sixth-speed shift, the third / seventh speed change gear D3 / 7 and the third speed change gear D3 / 7 are transmitted through the sleeve SLE1 of the first-gear synchronizer SL1 for the next forward seventh- 2 synchronize the input shaft (IS1-2).

[Advancing seven genus]

When the vehicle speed is to be increased to the seventh speed in the sixth speed state, the operation of the even-numbered second clutch CL2-2 and the even-numbered brake BK2 is released in the forward sixth speed state, Means The second clutch CL1-2 and the hole brake BK1 are actuated.

Then, in the forward sixth speed state, the third / seventh speed change gear D3 / 7 and the second means input shaft IS1-2 through the sleeve SEL1 of the hole means synchronizer SL1, The rotational power of the engine ENG is naturally transmitted to the engine output gear EDG, the hole means input gear G1, the hole means first input shaft IS1-1, the hole means second clutch CL1-2 The planetary carrier PC1, the sun gear S1, the second means input shaft IS1-2, the third / seventh speed change gear mechanism D3 / 7, the second counter gear CG2, , The final reduction gear (FD) and differential gear (DIFF)) through the final output gear (OG), and the forward seventh speed (D7) travel is performed.

That is, in the forward third speed (D3), the planetary gear set PG1 has no influence on the shift speed, but in the forward speed 7, the ring gear R1 operates as a fixed element by the operation of the hole means brake BK1 By operating the planetary carrier PC1 as an input element, the forward speed can be increased through the sun gear S1 to achieve the forward speed of 7.

After completion of the forward seventh-speed shifting as described above, the fourth / eighth-speed gearshift D4 / 8 and the even-throttle gear D4 / 8 via the sleeve SEL2 of the even- 2 input shaft (IS2-2).

[Going forward 8]

When the vehicle speed is to be increased to the second speed in the state of the seventh speed, the operation of the hole-side second clutch CL1-2 and the hole-side brake BK1 is released in the state of the seventh speed, Means The second clutch CL2-2 and the even-numbered brake BK2 are actuated.

Then, the fourth / eighth speed change gear D4 / 8 and the even-numbered second input shaft IS2-2 are driven via the sleeve SEL2 of the even-numbered synchronizer SL2 operated in the preliminary operation in the forward seventh- The rotational power of the engine ENG is naturally transmitted to the engine output gear EDG, the even-numbered input gear G2, the even-numbered first input shaft IS2-1, the even- The planetary carrier PC2, the sun gear S2, the even-numbered second input shaft IS2-2, the fourth / eighth-speed gearshift D4 / 8, the second counter gear CG2, , The final reduction gear (FD) and differential gear (DIFF)) through the final output gear (OG), and forward 8-speed (D8) travel is performed.

That is, in the forward fourth speed (D4), the even-numbered planetary gear set PG2 has no influence on the shift speed, but in the forward eighth speed (D4), the ring gear R2 is fixed Element, and the planetary carrier PC2 acts as an input element, so that the forward gear 8 can be realized by increasing the speed by the sun gear S2.

The description of the shifting process as described above is one example in which the speed change stages are sequentially ascended, and when the speed change stages descend sequentially, the reverse sequence may be made.

As described above, the transmission for a vehicle according to the embodiment of the present invention includes two planetary gear sets PG1 and PG2 in a plurality of DCT structures having a fourth-speed fixed speed change stage using two synchronizers SL1 and SL2. So that it is possible to realize multi-shafts and improve the fuel consumption.

Even though the two synchronizers SL1 and SL2 and the two planetary gear sets PG1 and PG2 are used to implement one forward speed and one reverse speed, the internal configuration is simplified by reducing the parts, Can be minimized.

In addition, there is an advantage in that when the shifting is performed, the shifting action is not generated because the shifting is performed while the two clutches alternately shift the hole means and the even-numbered shifting means.

While the present invention has been described in connection with certain exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, And all changes in the range of

BK1 ... Hall means brake
BK2 ... even brake
BK3 ... Reverse Brake
CS ... Counter shaft
D1 / 5 ... 1st / 5th speed gearbox
D2 / 6 ... 2nd / 6th speed gear
D3 / 7 ... 3rd / 7th speed gear
D4 / 8 ... 4th / 8th speed change gear
PG1 ... Hall means planetary gear set
PG2 ... even planetary gear set
SL1 ... Hall means synchronizer
SL2 ... synchronous synchronizer
T1 ... < / RTI >
T2 ... < / RTI >
IS1-1, IS1-2, IS1-3 ... Hall means First, second and third input axes
IS2-1, IS2-2, IS2-3 ... Even means First, second and third input axes
CL1-1, CL1-2 ... Hall means First and second clutches
CL2-1, CL2-2 ... Pairing means First and second clutches
CG1, CG2 ... First and second counter gears

Claims (25)

An engine having an engine output gear as a power source;
The rotational power transmitted from the engine is transmitted or accelerated by the planetary gear set to selectively transmit the rotational power from the engine via a synchronizer to a pair of hall means transmission gears disposed without rotation interference on the input means of the hall means to implement four odd gear stages An odd-numbered-way shifting portion;
The rotational power transmitted from the engine is transmitted or accelerated by the planetary gear set to selectively transmit the rotational power from the engine to the pair of the even-numbered transmission gears disposed on the even-numbered input shaft without rotating interference, through the synchronizer to implement four even- An even-numbered shifting portion to be shifted;
And the first and second counter gears fixedly disposed at a predetermined interval on the counter shaft disposed between the above-mentioned hole-side speed change portion and the even-numbered speed change speed portion are connected to each other by a pair of external gears An output unit for outputting rotational power, which is shifted in accordance with the gear ratio, to the differential output via the final output gear on the counter shaft;
A reverse mechanism that is configured between any one of the planetary gear sets of the above-mentioned one of the planetary gear sets of the odd-numbered planetary gear set and the even-numbered planetary gear set;
(20). The method according to claim 1,
The above-
An input means first input shaft connected to the engine output gear and an external gear;
A first input shaft and a second input shaft, the second input shaft being selectively connected to the first input shaft through a first clutch;
A third input shaft connected selectively to the first input shaft of the first means through a second clutch;
And the rotational force transmitted from the third input shaft of the first means is transmitted to the first input shaft of the second means, 2 < / RTI >
A pair of Hall element means transmissions arranged on the second input shaft of the Hall element without rotational interference and having different gear teeth; And
An odd-numbered-way synchronizer selectively synchronously connecting the pair of the first-mentioned one-way transmission with the second input shaft;
(20). 3. The method of claim 2,
The hole means first input shaft
And an input means gear is fixedly arranged on the front side of the engine so as to be in circumferential contact with the engine output gear,
The Hall device second input shaft
The first means being arranged on the same axis as the rear side of the first input shaft and being selectively connected to the first input shaft of the first means via the first means of the first means,
The Hall device third input shaft
And a hollow shaft which is disposed on the outer peripheral side of the second input shaft and is not rotationally interfered, and is selectively connected to the first input shaft of the first means through the second means of the second means. 3. The method of claim 2,
The Hall element planetary gear set
Wherein the sun gear is integrally connected to the second means input shaft, the planet carrier is integrally connected to the third means input shaft means, and the ring gear is selectively connected to the transmission housing via the hole means brake And the vehicle speed change device. The method as claimed in claim 2, 3, or 4,
The backward mechanism
A reverse brake configured between the planetary carrier of the planetary gear set and the transmission housing; And
A reverse input gear disposed on the second input shaft without rotating interference and directly connected to the ring gear of the Hall means planetary gear set and connected to the reverse output gear of the output portion via an external gear;
(20). 3. The method of claim 2,
The pair of the above-mentioned one-
A first-fifth speed change gear that implements the first speed and the fifth speed; And
And a third / seventh speed change gear that implements the third speed and the seventh speed. 7. The method according to claim 2 or 6,
The hole means synchronizer
Speed transmission that implements the first and fifth speeds and the third and seventh speed-change gears that implement the third and seventh speeds, Device. The method according to claim 1,
The even-numbered shifting portion
An even-numbered first input shaft connected to the engine output gear and an external gear;
A second input shaft that is selectively connected to the first input shaft through an even-numbered first clutch;
A third input shaft that is selectively connected to the first input shaft of the even-numbered means through a second-element second clutch;
And the rotational power transmitted from the third input shaft of the even-numbered means is increased, and the rotational power transmitted from the first-mentioned third-order input shaft is increased, 2 < / RTI > input shaft;
A pair of even-numbered gearshifts disposed on the second input shaft without rotation interference and having different gear teeth; And
An even-numbered synchronizer for selectively synchronously connecting the pair of first-stage transmission gears with the second-stage input shaft;
(20). 9. The method of claim 8,
The first input shaft
And an even-numbered input gear is fixedly disposed on the front side of the engine so as to be circumferentially engaged with the engine output gear,
And the even-numbered second input shaft
A second input shaft that is selectively connected to the first input shaft of the even-numbered means through a first-side first clutch,
The third input shaft of the even-
And a hollow shaft which is disposed on the outer peripheral side of the second input shaft with no rotational interference, and is selectively connected to the first input shaft of the even-numbered means through the second-side second clutch. 9. The method of claim 8,
The even-numbered planetary gear set
Wherein the sun gear is integrally connected to the second input shaft, the planetary carrier is integrally connected to the third means input shaft, and the ring gear is selectively connected to the transmission housing via the even- And the vehicle speed change device. 9. The method of claim 8,
The pair of even-numbered gearboxes
A second / sixth speed change gear that implements the second speed and the sixth speed;
And a fourth / eighth speed change gear that implements the fourth speed and the eighth speed. The method according to claim 8 or 11,
The pair means synchronizer
A second / sixth speed change gear that implements a second speed and a sixth speed, and a fourth / sixth speed change gear that implements fourth and eighth speeds, Device. The method according to claim 1,
The output
A counter shaft disposed in parallel in the axial direction between the even-numbered-side shifting portion and the even-numbered shifting portion;
A first counter gear fixedly disposed on the counter shaft and matingly engaging with one of the pair of transmission gears on the odd-numbered-way transmitting portion and the even-numbered shifting portion;
And a second counter gear which is fixedly arranged on the rear side of the counter shaft and spaced apart from the first counter gear by a predetermined distance and which is not circumferentially engaged with the first counter gear among the pair of transmission gears on the first and second counter gears A second counter gear circumscribing the transmission gear of the second counter gear;
And a final output gear which is fixed to one end of the counter shaft and transfers rotational power of the counter shaft to the final reduction gear. 6. The method of claim 5,
The output
A counter shaft disposed in parallel in the axial direction between the even-numbered-side shifting portion and the even-numbered shifting portion;
A first counter gear fixedly disposed on the counter shaft and matingly engaging with one of the pair of transmission gears on the odd-numbered-way transmitting portion and the even-numbered shifting portion;
And a second counter gear which is fixedly arranged on the rear side of the counter shaft and spaced apart from the first counter gear by a predetermined distance and which is not circumferentially engaged with the first counter gear among the pair of transmission gears on the first and second counter gears A second counter gear circumscribing the transmission gear of the second counter gear;
A final output gear which is fixed to one end of the counter shaft and transfers rotational power of the counter shaft to the final reduction gear; And
A reverse output gear fixed to one side of the counter shaft and circumferentially engaged with the reverse input gear;
(20). An engine having an engine output gear as a power source;
A first input shaft connected to the engine output gear and an external gear; a second input shaft selectively connected to the first input shaft of the first means through a first clutch of the first means; A third input shaft that is selectively connected through a second clutch; a second input shaft that is disposed between the second input shaft and the third input shaft of the first means and transmits rotational power transmitted to the second input shaft as it is, Means a planetary gear set for increasing the rotational power transmitted from the third input shaft to the second input shaft of the second means and a pair of planetary gears arranged on the second input shaft without rotating interference and having different gear teeth, And an odd number means for implementing an odd-numbered synchronizer for selectively synchronously connecting the pair of the in- A speed changing portion;
A second input shaft that is selectively connected to the first input shaft through an even-numbered first clutch, and an even-numbered second input shaft that is connected to the first output shaft by an even- A second clutch that is selectively connected through a second clutch; a second clutch that is disposed between the second-side input shaft and the third-side input shaft and transmits rotational power transmitted to the second-side input shaft as it is, Means for transmitting a rotation power transmitted from a third input shaft to an even-numbered planetary gear set for transmitting the increased power to the second-mentioned second input shaft; and a pair of gear- And a pair of synchronizer means for synchronously selectively connecting the pair of first and second input shafts to the second input shaft, Even-shift unit to implement the even shift speed;
An output unit disposed between the odd-numbered-way shifting unit and the even-numbered shifting unit for outputting a rotational force, which is shifted in accordance with the gear ratio, to the differential in a state in which the transmission and the external gear are connected;
A reverse mechanism that is configured between any one of the planetary gear sets of the above-mentioned one of the planetary gear sets of the odd-numbered planetary gear set and the even-numbered planetary gear set;
(20). 16. The method of claim 15,
The hole means first input shaft
And an input means gear is fixedly arranged on the front side of the engine so as to be in circumferential contact with the engine output gear,
The Hall device second input shaft
The first means being arranged on the same axis as the rear side of the first input shaft and being selectively connected to the first input shaft of the first means via the first means of the first means,
The Hall device third input shaft
And a hollow shaft which is disposed on the outer peripheral side of the second input shaft and is not rotationally interfered, and is selectively connected to the first input shaft of the first means through the second means of the second means. 16. The method of claim 15,
The Hall element planetary gear set
Wherein the sun gear is integrally connected to the second means input shaft, the planet carrier is integrally connected to the third means input shaft means, and the ring gear is selectively connected to the transmission housing via the hole means brake And the vehicle speed change device. 18. The method of claim 15, 16 or 17,
The backward mechanism
A reverse brake configured between the planetary carrier of the planetary gear set and the transmission housing;
A reverse input gear disposed on the second input shaft without rotating interference and directly connected to the ring gear of the Hall means planetary gear set and connected to the reverse output gear of the output portion via an external gear;
(20). 16. The method of claim 15,
The pair of the above-mentioned one-
A first-fifth speed change gear that implements the first speed and the fifth speed; And
And a third / seventh speed change gear that implements the third speed and the seventh speed. The method according to claim 15 or 19,
The hole means synchronizer
Speed transmission that implements the first and fifth speeds and the third and seventh speed-change gears that implement the third and seventh speeds, Device. 16. The method of claim 15,
The first input shaft
And an even-numbered input gear is fixedly disposed on the front side of the engine so as to be circumferentially engaged with the engine output gear,
And the even-numbered second input shaft
A second input shaft that is selectively connected to the first input shaft of the even-numbered means through a first-side first clutch,
The third input shaft of the even-
And a hollow shaft which is disposed on the outer peripheral side of the second input shaft with no rotational interference, and is selectively connected to the first input shaft of the even-numbered means through the second-side second clutch. 16. The method of claim 15,
The even-numbered planetary gear set
Wherein the sun gear is integrally connected to the second input shaft, the planetary carrier is integrally connected to the third means input shaft, and the ring gear is selectively connected to the transmission housing via the even- And the vehicle speed change device. 16. The method of claim 15,
The pair of even-numbered gearboxes
A second / sixth speed change gear that implements the second speed and the sixth speed;
And a fourth / eighth speed change gear that implements the fourth speed and the eighth speed. 24. The method according to claim 15 or 23,
The pair means synchronizer
A second / sixth speed change gear that implements a second speed and a sixth speed, and a fourth / sixth speed change gear that implements fourth and eighth speeds, Device. 19. The method of claim 18,
The output
A counter shaft disposed in parallel in the axial direction between the even-numbered-side shifting portion and the even-numbered shifting portion;
A first counter gear fixedly disposed on the counter shaft and matingly engaging with one of the pair of transmission gears on the odd-numbered-way transmitting portion and the even-numbered shifting portion;
And a second counter gear which is fixedly arranged on the rear side of the counter shaft and spaced apart from the first counter gear by a predetermined distance and which is not circumferentially engaged with the first counter gear among the pair of transmission gears on the first and second counter gears A second counter gear circumscribing the transmission gear of the second counter gear;
A final output gear which is fixed to one end of the counter shaft and transfers rotational power of the counter shaft to the final reduction gear; And
A reverse output gear fixed to one side of the counter shaft and circumferentially engaged with the reverse input gear;
(20).

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