KR100802935B1 - A six-speed power train of an automatic transmission for a vehicle - Google Patents

Abstract

 By appropriately distributing the brake and clutch to facilitate the formation of the flow path, and to provide a six-speed power train of the automatic transmission for a vehicle that can improve the driving performance by optimizing the gear ratio;

A double pinion planetary gear set, comprising: a first actuating element, which always acts as an input element, a second actuating element, optionally acting as an output element, and optionally said first and second actuating elements acting as an output and fixed element. A first planetary gear set having a third operating element variably connected to any one of the operating elements;

A planetary type planetary gear set, comprising: a first actuating element acting as an optional input element, a second actuating element acting as an output element at all times; a third actuating element acting as an input element at all times; A six-speed power train of an automatic transmission for a vehicle is provided by combining a second planetary gear set having a fourth operating element acting as a stationary element with four clutches and two brakes.

Automatic transmission. clutch. Planetary Gear Sets

Description

Six speed power train of car automatic transmission {A SIX-SPEED POWER TRAIN OF AN AUTOMATIC TRANSMISSION FOR A VEHICLE}

1 shows a power train according to a first embodiment of the present invention;

2 is a basic configuration of a power train according to the present invention.

Figure 3 is a forward 1,3 speed shift diagram of the power train according to the present invention.

4 is a forward 5, 6 speed and reverse shift diagram of the power train according to the present invention.

5 is a forward two, four speed shift diagram of the power train according to the present invention.

6 is an operation table of the friction element applied to the present invention.

7 shows a power train according to a second embodiment of the present invention;

8 is an embodiment of a conventional power train.

9 is a table of operating elements of the power train according to FIG. 8.

The present invention relates to a six-speed powertrain of an automatic transmission for a vehicle applied to an automatic transmission for a vehicle to realize a six-speed transmission stage.

The vehicle automatic transmission detects the driving state of the vehicle from the detection means disposed in place of the vehicle, and based on this, the transmission control unit (TCU) automatically controls the power train composed of a combination of planetary gear sets to automatically control the vehicle. It is configured to carry out shifting.

Accordingly, the power train applied to the automatic transmission is preferably configured to implement more transmission stages in order to improve power performance and fuel consumption rate.

Also, even if the same number of gear stages are implemented, durability, power transmission efficiency, size and weight vary greatly depending on the combination method of the planetary gear set. Therefore, the power train can be more robust and compact while minimizing power loss. Efforts for development are ongoing.

In developing a power train using a planetary gear set, a new planetary gear set is not developed, but a simple combination of a conventional planetary gear set and a composite planetary gear set in some way, and the accompanying clutch and brake In addition, various studies have been actively conducted with the aim of realizing a desired shift stage and a shift ratio without any power loss by arranging several one-way clutches at any position.

In particular, in the case of a manual transmission, if there are too many shift stages, the driver should shift frequently. However, in the case of an automatic transmission, the shift is automatically performed according to the driving state. Therefore, more shift stages can be realized. Developing a power train is very important.

In order to cope with this trend, a variety of researches have recently been conducted on power trains that can realize a shift speed of six forward speeds or more.

As an example, as shown in FIG. 8, three single pinion planetary gear sets PG1, PG2, and PG3 are combined, and the first planet carrier 102 and the second ring gear 104 are connected, and the second The planet carrier 106 and the third ring gear 108 are connected, and the first ring gear 110 and the third planet carrier 112 are connected.

The second sun gear 114 is directly connected to the input shaft 100, the first sun gear 116 is variably connected to the input shaft 100 via the first clutch C1, and the first planet carrier 102. Is variably connected to the input shaft 100 via the second clutch C2.

In addition, the third sun gear 118 is connected to the housing 120 via the first brake B1, and the first planet carrier 102 and the first sun gear 116 are the second and third brakes B2, respectively. It is connected to the housing 120 via (B3), the third planet carrier 112 is mounted with an output gear 122 to operate as an output element.

In the power train, as shown in FIG. 9, the first and second brakes B1 and B2 operate in the first forward speed, the first and third brakes B1 and B3 operate in the second speed, and in the third speed. The first clutch C1 and the first brake B1 operate, the second clutch C2 and the first brake B1 operate at the fourth speed, and the first and second clutch C1 (C2) at the fifth speed. ) Is operated, the second clutch C2 and the third brake B3 are operated at the sixth speed, and the first clutch C1 and the second brake B2 are operated at the reverse shift stage, and the forward six speeds and the reverse It is to realize the gear stage of 1 speed.

However, in the power train as described above, since both the clutch and the brake are disposed at the rear of the transmission, there is a problem in that the formation of the operation flow path is disadvantageous.

In addition, since the reverse speed ratio is small, the reverse climbing performance is disadvantageous, and because the speed ratio between the 2nd and 3rd stages is large, the tip shock is large in the downtown driving area of the low speed region, and the speed ratio of 1 forward speed is large, resulting in tire slip when starting. The low gear ratio at the gearshift stage implies a problem of poor driving force.

Therefore, the present invention has been invented to solve the above conventional problems, the object of the present invention is to facilitate the formation of the flow path by distributing the brakes and clutches appropriately, it is possible to optimize the step ratio to improve the operability To provide a six-speed power train for a vehicle automatic transmission.

In order to realize the above object, the present invention provides a double pinion planetary gear set, comprising: a first operation element comprising a first sun gear, a second operation element consisting of a first ring gear, and a third operation consisting of a first planet carrier. A first planetary gearset comprising an element;
A cabinet type planetary gear set comprising: a first actuating element comprising a second sun gear meshing with a short pinion, a second actuating element comprising a second ring gear, a third actuating element comprising a second planetary carrier, and a long pinion And a second planetary gear set including a fourth operating element comprising a third sun gear engaged with the
The first actuating element of the first planetary gear set is directly connected to the input shaft to act as an input element,
The second actuating element of the first planetary gearset is variably connected to the second actuating element of the second planetary gearset connected to the output gear via a clutch,
The first actuating gear set of the first planetary gearset is variably connected with the transmission housing and the brake while the third actuating element of the first planetary gearset is directly connected to the third actuating element of the second planetary gearset. Variably connected with one of the operating elements via the clutch,
The first actuating element of the second planetary gearset is variably connected with the first actuating element of the first planetary gearset via a clutch,
A sixth speed train of an automatic transmission for a vehicle in which the fourth actuating element of the second planetary gearset is variably connected to the first actuating element of the first planetary gearset through a clutch and variably connected through a transmission housing and a brake. to provide.

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

 1 illustrates an embodiment of a power train according to the present invention, wherein the power train of the present invention includes first and second planetary gear sets PG1 and PG2 arranged on the same axis, and four clutches C1. C2, C3, C4, and two brakes B1, B2.

Wherein the first planetary gear set (PG1) is composed of a double pinion planetary gear set having two pinions, the second planetary gear set (PG2) is a combination of a single pinion planetary gear set and a double pinion planetary gear set, It consists of a composite type planetary gear set of a combination of ring gears and planetary carriers.

The first planetary gear set PG1 includes a first operating element consisting of a first sun gear S1, a second operating element consisting of a first ring gear R1, and a third consisting of a first planetary carrier PC1. It includes an actuating element.

The second planetary gear set PG2 may include a first operating element including a second sun gear S2 meshed with the short pinion P1, a second operating element including a second ring gear R2, and the short. A third actuating element comprising a second planetary carrier PC2 supporting the pinion P1 and the long pinion P2, and a fourth actuating element comprising a third sun gear S3 engaged with the long pinion P2. It is made to include.

In the combination of the first and second planetary gear sets PG1 and PG2 as described above, the first operating element, which is the first sun gear S1, and the input shaft IS are directly connected to always operate as an input element. The first planetary carrier PC1, which is the third operating element of the first planetary gear set PG1, and the second planetary carrier PC2, which is the third operating element of the second planetary gear set PG1, are directly connected to each other. It was made.

The first sun gear S1, which is the first operating element of the first planetary gear set PG1, is the second sun gear S2, which is the first operating element of the second planetary gear set PG1, and the fourth operating element. The first and second clutches C1 and C2 are disposed between the third sun gear S3 to be variably connected.

In addition, a third clutch C3 is disposed between the first ring gear R1, which is the second actuating element of the first planetary gear set PG1, and the first planet carrier PC1, which is the third actuating element. Fourth clutch C4 between the first ring gear R1, which is the second operating element of the first planetary gear set PG1, and the second ring gear S2, which is the second operating element of the second planetary gear set PG2. ) To be variably connected.

The first planetary carrier PC1, which is the third operating element of the first planetary gearset PG1, is variably connected to the transmission housing H via the first brake B1, and the second planetary gearset The third sun gear S3, which is the fourth operating element of PG2, is variably connected to the transmission housing H via the second brake B2.

An output gear OG is connected to the second ring gear R2, which is the second operating element of the second planetary gear set PG2, to operate as an output element at all times, the output gear OG of which the final reduction gear Although a structure for transmitting power to the differential device is omitted, such a structure may be used in the known, and it may also realize the object intended by the present invention, whatever the structure of the structure will be omitted.

As shown in the diagram the combination relationship for the power train of the present invention as shown in FIG. 2, the first planetary gear set (PG1) is the first actuating element (A) on the lever is the first sun gear (S1), the second The actuation element B is set to the first ring gear R1 and the third actuation element C to the first planet carrier PC1.

In the second planetary gear set PG2, the first actuating element D on the lever is the second sun gear S2, the second actuating element E is the second ring gear R2, and the third actuating element F. The second planetary carrier PC2 and the fourth operating element G are set to the third sun gear S3.

In addition, as described above, the first planetary gear set PG1 having three actuation elements and the second planetary gear set PG2 having four actuation elements may include the third actuating element of the first planetary gear set PG1. C) and the third operating element F of the second planetary gear set PG2 are fixedly connected, and the first operating element A of the first planetary gear set PG1 is connected to the first and second clutch C1. It is variably connected to the first actuating element (D) and the fourth actuating element (G) of the second planetary gear set (PG2) via (C2).

The second actuating element B and the third actuating element C of the first planetary gear set PG1 are variably connected via the third clutch C3, and the first planetary gear set PG1 is provided. The second operating element (B) is variably connected to the second operating element (E) of the second planetary gear set (PG2) via the fourth clutch (C4).

Accordingly, when the first operating element A of the first planetary gear set PG1 is connected to the first operating element E of the second planetary gear set PG2 via the first clutch C1, FIG. As in 3, five operating nodes N1, N2, N3, N4 and N5 are set on the lever.

That is, the first operating node N1 includes the first operating element A of the first planetary gear set PG1 and the first operating element D and the second operating node N2 of the second planetary gear set PG2. ) Is the second actuating element B of the first planetary gear set PG1, the third actuating node N3 is the second actuating element E of the second planetary gearset PG2, and the fourth actuating node N4. ) Is the third operating element (C) of the first planetary gear set (PG1) and the third operating element (F) of the second planetary gear set (PG2), the fifth operating node (N5) is the second planetary gear set ( It becomes the fourth actuating element G of PG2).

When the second clutch C2 is connected, five operating nodes N1, N2, N3, N4, N5, and N6 are set on the lever as shown in FIG.

That is, the first operating node N1 is the first operating element D of the second planetary gear set PG2, and the second operating node N2 is the second operating element E of the second planetary gear set PG2. ), The third operating node N3 is the third operating element C of the first planetary gear set PG1 and the third operating element F of the second planetary gear set PG2, and the fourth operating node N4. ) Is the second actuating element B of the first planetary gear set PG1, and the fifth actuating node N5 is the first actuating element A and the second planetary gearset of the first planetary gearset PG1. It becomes the 4th operation element G of PG2.

When the second actuating element B of the first planetary gear set PG1 is connected to the second actuating element E of the second planetary gear set PG2 via the fourth clutch C4, FIG. As in 5, five operating nodes N1, N2, N3, N4 and N5 are set on the lever.

Specifically, the first operating node N1 is the first operating element D of the second planetary gear set PG2, and the second operating node N2 is the first operating element of the first planetary gear set PG1. A), the third operating node N3 includes the second operating element B of the first planetary gear set PG1 and the second operating element E of the second planetary gear set PG2 and the fourth operating node ( N4) is the third actuating element C of the first planetary gear set PG1 and the third actuating element F of the second planetary gearset PG2, and the fifth actuating node N5 is the second planetary gearset. It becomes the 4th operation element G of PG2.

As described above, the method for setting each operation node is known according to a combination configuration, which can be easily understood by a person skilled in the art of power train, and detailed description thereof will be omitted.

As described above, the power train according to the present invention is shifted while the friction element is operated and controlled as shown in FIG. 6.

[1st speed forward]

In the forward 1 speed, as shown in FIG. 6, the first brake B1 and the first clutch C1 are operated to be controlled. In this case, since the first clutch C1 is operated, the first operating node N1 as shown in FIG. A first operating node (N4) that is the fourth operating node (N4) by the operation of the first brake (B1) while the input is made through the first operating element (A) (D) of the first and second planetary gear sets (PG1) (PG2) 2, the third operating element (C) (F) of the planetary gear set (PG1) is to operate as a fixed element.

Then, the first forward speed line SP1 of FIG. 3 is formed by the complementary action of the first and second planetary gear sets PG1 and PG2, and the output is the second planetary gear set (3). Through the second operating element (E) of the PG2 is made by D1 as the speed of the forward 1 is made.

[2 speed forward]

At the second forward speed, the operation of the first clutch C1 operated in the state of the first forward speed is released, and the fourth clutch C4 is operated.

Then, the fourth clutch C4 acts, and as shown in FIG. 5, an input is made through the first actuating element A of the first planetary gear set PG1, which is the second actuating node N2. The fourth operating node N4 is operated as a fixed element as the first forward speed by the fourth operating node N4 by the operation of the first brake B1.

Accordingly, the forward two-speed line SP2 is formed, and the output is the second operating element B of the first planetary gear set PG2 which is the third operating node N3 and the second of the second planetary gear set PG2. Through the operating element (E) is made by D2, the shift in the second forward speed is made.

[3 speed forward]

At the third forward speed, the first brake B1 and the fourth clutch C4 operated in the second forward speed are released, and the second brake B2 and the first clutch C1 are operated.

Then, the first clutch C1 is operated. As shown in FIG. 3, the fifth brake node N5 is operated by the operation of the second brake B2 while the input is made through the first brake node N1. It will act as a stationary element.

Accordingly, the third forward speed SP3 is formed, and the output is made by D3 through the second operating element E of the second planetary gear set PG2 which is the third operating node N3, and the shift of the third forward speed is made. Will be done.

[4 forward speed]

At the fourth forward speed, the operation of the first clutch C1 operated in the state of the third forward speed is released, and the fourth clutch C4 is operated and controlled.

Then, the fourth clutch C4 acts, and as shown in FIG. 5, an input is made through the first actuating element A of the first planetary gear set PG1, which is the second actuating node N2. 5 The operating node N5 is operated as a fixed element by the operation of the second brake B2.

Accordingly, the forward four-speed line SP4 is formed, and the output is formed by the second operating element B of the first planetary gear set PG2, which is the third operating node N3, and the second planetary gear set PG2. It is made as D4 through 2 operating elements (E) and the shifting speed of 4 forwards is achieved.

[5th forward]

At the fifth forward speed, the third brake B3 operated in the state of the fourth forward speed is released, and the second clutch C2 is operated.

Then, the first actuating element A of the first planetary gear set PG1 and the fourth actuating element G of the second planetary gear set PG2 are connected to each other by the operation of the second clutch C2. As the second operating element B of the gear set PG1 and the second operating element ㄸ of the second planetary gear set PG2 are connected, the first and second planetary gear sets PG1 and PG3 are connected as a whole. The fifth speed line SP5 is formed as shown in FIG. 4, and the output is made as much as D5 as the input, while shifting at the fifth forward speed is made.

[6th forward]

At the sixth forward speed, the second clutch C2 and the fourth clutch C4 operated in the state of the fifth forward speed are released, and the second brake B2 and the third clutch C3 operate.

Then, the first and fourth clutches C1 and C4 do not operate, and the shift is made in the state as shown in FIG. 4, in which case the first planetary gear set PG2 is operated by the operation of the third clutch C3. Is in a direct connection state, so that the second brake B2 is operated while being input through the third operating elements C and F of the first and second planetary gear sets PG1 which are the third operating nodes N3. As a result, the fourth operating element G of the second planetary gear set PG2, which is the fifth operating node N5, is operated as the fixed element.

Accordingly, the sixth speed line SP6 is formed, and the output is made by D6 through the second operation node N2, and the sixth forward speed is shifted.

[apse]

In the reverse direction, the second clutch C2 and the first brake B1 are controlled to operate.

Then, the shift is made in the same state as in FIG. 4 by the operation of the second clutch C2. In this case, the third brake is driven by the first brake B1 in a state where an input is made through the fifth operating node N5. The third operating element C (F) of the first and second planetary gear sets PG1, which are operating nodes N2, is operated as a fixed element, and as a reverse speed line SR, a second output element is formed. As the output of the rs is made through the operating node N2, the reverse shift is made.

In the power train of the present invention in which the shift is performed as described above, the number of teeth of the first sun gear S1 and the first ring gear R1 is set to 35 and 80, and the second sun gear S2, the third sun gear S3, and the first When the number of teeth of two ring gears (R2) is 30, 40, 100, as shown in Fig. 6, it is 3.333 at 1st forward, 2.286 at 2nd forward, 1.667 at 3rd forward, 1.367 at 4th forward, 1.000 at 5th forward, 1.000 forward At 6th speed, it is set to 0.714 to optimize the gear ratio of each gear.

7 shows a second embodiment according to the present invention, in which all configurations are the same as in the first embodiment, but the third clutch C3 is connected to the third actuating element of the first planetary gear set PG1. It is arranged between the first planetary carrier (PC1) and the first sun gear (S1) that is the first operating element.

Accordingly, since the functions of controlling the first planetary gear set PG1 in the direct connection state are the same, only the positions of the third clutch C3 are different from those of the first embodiment. Configuration and operation of the second embodiment will be omitted.

In the second embodiment, the third clutch C3 is variably connected to the third operating element and the first operating element. However, the present invention is not limited thereto, and the third clutch C3 is interposed between the third operating element and the input shaft IS. The same effect can be obtained even by linking them variably.

Although the preferred embodiment of the power train of the present invention has been described above, the present invention is not limited to the above embodiment, and those skilled in the art can easily invent from the embodiments of the present invention. It includes all changes to the extent considered equivalent.

As described above, the power train of the present invention is an invention that can facilitate the formation of the flow path by distributing the brakes and the clutches back and forth as compared with the related art, and can improve the operability by optimizing the step ratio.

Claims (12)

A double pinion planetary gear set, comprising: a first planetary gear set including a first actuating element made of a first sun gear, a second actuating element made of a first ring gear, and a third actuating element made of a first planetary carrier; A cabinet type planetary gear set comprising: a first actuating element comprising a second sun gear meshing with a short pinion, a second actuating element comprising a second ring gear, a third actuating element comprising a second planetary carrier, and a long pinion And a second planetary gear set including a fourth operating element comprising a third sun gear engaged with the The first actuating element of the first planetary gear set is directly connected to the input shaft to act as an input element, The second actuating element of the first planetary gearset is variably connected to the second actuating element of the second planetary gearset connected to the output gear via a clutch, The first actuating gear set of the first planetary gearset is variably connected with the transmission housing and the brake while the third actuating element of the first planetary gearset is directly connected to the third actuating element of the second planetary gearset. Variably connected with one of the operating elements via the clutch, The first actuating element of the second planetary gearset is variably connected with the first actuating element of the first planetary gearset via a clutch, The sixth speed of the automatic transmission for a vehicle characterized in that the fourth operating element of the second planetary gearset is variably connected to the first operating element of the first planetary gearset through a clutch and at the same time variably connected to the transmission housing and the brake. Power train. The six-speed power train of an automatic transmission for a vehicle according to claim 1, wherein the third actuating element of the first planetary gearset is variably connected with the second actuating element of the first planetary gearset via a clutch. The six-speed power train of an automatic transmission according to claim 1, wherein the third actuating element of the first planetary gearset is variably connected with the first actuating element of the first planetary gearset via a clutch. delete delete delete delete delete delete A double pinion planetary gear set, comprising: a first planetary gear set including a first actuating element made of a first sun gear, a second actuating element made of a first ring gear, and a third actuating element made of a first planetary carrier; A cabinet type planetary gear set comprising: a first actuating element comprising a second sun gear meshing with a short pinion, a second actuating element comprising a second ring gear, a third actuating element comprising a second planetary carrier, and a long pinion And a second planetary gear set including a fourth operating element comprising a third sun gear engaged with the The first operating element of the first planetary gear set is connected to the input shaft such that the first operating element is always operated as an input element, and the third operating element of the first planetary gear set and the third operating element of the second planetary gear set are directly connected to each other. In a state in which the first clutch is disposed between the first actuating element of the first planetary gearset and the first actuating element of the second planetary gearset, the second clutch is the first actuation of the first planetary gearset. A third clutch is disposed between the element and the fourth actuating element of the second planetary gearset, and a third clutch is disposed between the second actuating element and the third actuating element of the first planetary gearset, and the fourth clutch is the first actuating element. Disposed between the second operating element of the planetary gearset and the second operating element of the second planetary gearset connected to the output gear, The third operating element of the first planetary gear set is connected to the transmission housing via the first brake, and the fourth operating element of the second planetary gear set is connected to the transmission housing via the second brake. Six-speed power train with automatic transmission. A double pinion planetary gear set, comprising: a first planetary gear set including a first actuating element made of a first sun gear, a second actuating element made of a first ring gear, and a third actuating element made of a first planetary carrier; A cabinet type planetary gear set comprising: a first actuating element comprising a second sun gear meshing with a short pinion, a second actuating element comprising a second ring gear, a third actuating element comprising a second planetary carrier, and a long pinion And a second planetary gear set including a fourth operating element comprising a third sun gear engaged with the The first actuating element of the first planetary gearset is connected to the input shaft so as to operate as an input element at all times, and the third actuating element of the first planetary gearset and the third actuating element of the second planetary gearset are directly connected. In a state of being; A first clutch is disposed between the first actuating element of the first planetary gearset and the first actuating element of the second planetary gearset, and a second clutch is disposed between the first actuating element of the first planetary gearset and the first actuating element. 2 is disposed between the fourth actuating element of the planetary gearset, a third clutch is disposed between the first actuating element and the third actuating element of the first planetary gearset, and a fourth clutch is formed of the first planetary gearset. It is disposed between the second operating element and the second operating element of the second planetary gear set to which the output gear is connected, The third operating element of the first planetary gear set is connected to the transmission housing via the first brake, and the fourth operating element of the second planetary gear set is connected to the transmission housing via the second brake. Six-speed power train with automatic transmission. The method of claim 11, wherein the third clutch is A six-speed power train of an automatic transmission for a vehicle, characterized in that it is disposed between the third actuating element of the first planetary gear set and the input shaft.

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