KR101700910B1

KR101700910B1 - Continuously variable automatic transmission system based on combining single planetary gear set and single fluid power train

Info

Publication number: KR101700910B1
Application number: KR1020150156962A
Authority: KR
Inventors: 나자열
Original assignee: 나자열; (주)대기기업
Priority date: 2015-11-09
Filing date: 2015-11-09
Publication date: 2017-02-13

Abstract

The present invention can be applied to various kinds of vehicles and industrial machines driven by an engine such as a gasoline engine, a diesel engine, a gas engine, or an electric motor and the like, and is used for a vehicle such as stop, low speed, high speed, acceleration, A single planetary gear set capable of controlling the torque and speed required for driving the vehicle in accordance with each driving condition, and a fluid dynamic power transmission mechanism combination-based, continuously variable transmission system. According to the present invention, there is provided a single-speed automatic transmission system based on a combination of a single planetary gear set and a fluid-type power transmission mechanism, wherein a speed-change module is implemented by a combination of a planetary gear mechanism and a fluid-type power transmission mechanism (fluid clutch, torque converter, An additional braking mechanism for controlling the operation of the planetary gear mechanism constituting the speed change module or a planetary gear mechanism for interlocking with the rotational speed of the vehicle engine shaft, which is controlled by an accelerator operated by a driver of the vehicle, And the operation of the fluid type power transmission mechanism is automatically controlled. Thus, the vehicle can be easily and easily operated, and the driving ability of the vehicle driver can be improved. In addition, according to the present invention, when the rotational force is transmitted from the vehicle engine shaft to the axle, the torque change and the shift are induced while the relationship between the torque and the rotational speed (rpm) is inversely proportional to each other by the planetary gear mechanism of the transmission module The performance of the vehicle is improved by automatically implementing the ability to mount the vehicle according to the vehicle speed. Particularly, the present invention maximizes the transmission efficiency and system stability even through the structure of a single-stage variable transmission module of a single planetary gear set transmission unit composed of a minimized component based on a combination of a single planetary gear set and a fluidized power transmission mechanism.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a single planetary gear set, and more particularly, to a continuously variable automatic transmission system based on combined single planetary gear set and single fluid power train,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a single planetary gearset-based fluid dynamic transmission mechanism-based, continuously variable transmission system, and more particularly to a transmission module for various vehicles and industrial machines such as passenger cars, Which is controlled by an accelerator operated by a driver of the vehicle even if a separate brake mechanism or clutch mechanism is not provided in the speed change module, Speed transmission module structure comprising a minimized component based on a combination of a single planetary gear set and a fluid power transmission mechanism so that the operation of the fluid power transmission mechanism and the planetary gear mechanism can be automatically controlled according to the number The transmission efficiency and the system stability can be maximized. Also, A speed-increasing gear, the reduction gear, by adding a forward-reverse clutch, single planetary gear set which can additionally perform the function of shifting to neutral and so on - directed to a fluid power transmission apparatus based on a combination of a continuously variable automatic transmission system.

The transmission of the vehicle is installed between an engine shaft which is rotated by receiving torque from an engine of the vehicle and an axle which drives a driving wheel that moves the vehicle, and is stopped, low speed traveling, high speed traveling, , And parking, it is a device that adjusts the torque and speed required when the vehicle is driven.

In order to realize the shifting steps from the first step to the fifth step, a plurality of gears having different gear teeth are provided so that the gears are changed for each shift step, and the torque and speed So that the vehicle can be operated. Various types of shift devices have been developed and are currently in use to realize this. There are manual transmissions in which gears are directly operated by a vehicle driver, automatic transmissions in which gears are automatically operated according to vehicle speed, And a continuously variable automatic transmission in which a shift is made continuously by using a pulley or a chain.

Here, the automatic transmission is composed of a combination of a fluid type power transmission mechanism such as a fluid clutch or a torque converter, and a planetary gear mechanism. The automatic transmission is provided with a P (Parking), R Neutral), D (Drive), 2 (Second), L (lock-up), etc., the gear is automatically operated according to the selected travel selection mode so that the shift is performed.

As a technique related to such an automatic transmission, there are Korean Patent Publication No. 10-1995-0000045 entitled " Unmanned Automatic Transmission Device ", Registered Patent Publication No. 10-0290390 entitled "Automotive continuously variable transmission & -0801095 "Unmanned Automatic Transmission ", Published Unexamined Patent Application Publication No. 10-1996-0040756," Automatic Transmission Device for Vehicle ", Publication No. 10-1998-030064, "

On the other hand, Korean Patent Registration No. 10-0637799 discloses a continuously variable automatic transmission system for transmitting power from an engine input shaft to an engine output shaft via an automatic transmission fluid as shown in FIG. 1, A turbine rotating under the fluid flow by the impeller, and a stator for introducing a recoil fluid to the impeller to increase the torque so as to prevent the recoil of the automatic transmission fluid flowing by the turbine, A torque converter 10 that shifts by a difference in speed ratio between the impeller and the turbine and transmits it to a transmission input; A first ring gear 20R and a planetary carrier 20C which are respectively disposed at predetermined intervals on the axis line between the engine input shaft and the engine output shaft and which are respectively provided with a sun gear 20S, And a second planetary gear set (20a, 20b); A first multi-plate clutch 30a installed between the first planetary gear set and the second planetary gear set for transmitting an output through the first planetary gear set 20a to the second planetary gear set 20b, A second multi-plate clutch 30b installed at a portion of the second planetary gear set 20b to mediate power transmission through the second planetary gear set; Wherein the sun gear (20S) of the first planetary gear set (20a) is connected to the shaft of the impeller (20B) The ring gear 20R of the first planetary gear set 20a is connected in series to the shaft 10T of the turbine and receives a change from the torque converter 10 And the planetary carrier 20C of the first planetary gear set 20a receives the outputs from the sun gear 20S and the ring gear 20R, have.

Here, the continuously variable automatic transmission system is a system in which a shift is performed by a speed ratio between a rotational speed of a pump constituting a torque converter and a rotational speed of a turbine rotated by a power transmitted through a fluid, A first multi-plate clutch is provided between the second planetary gear sets to transmit the output through the first planetary gear set to the second planetary gear set, and a second multi-plate clutch is provided to the second planetary gear set, The torque converter and the planetary gear set alone can not respond to the torque required when the vehicle is driven at a low speed. Thus, by controlling the operation amount of the first multi-plate clutch through detection of the vehicle speed and the acceleration state, Respectively.

Thus, the endless automatic transmission system has a configuration in which a plurality of multi-plate clutches are provided in addition to the torque converter and the planetary gear set so that the apparatus configuration for shifting of the vehicle is complicated and manufacturing costs are increased. In addition, A separate control mechanism for controlling the operation of the planetary gear set, such as a multi-plate clutch that senses and operates the vehicle speed and the acceleration state, needs to be installed.

Also, Korean Patent Laid-Open Publication No. 10-1996-0040756 discloses a configuration in which an automatic transmission is constituted by combining a known three-element single-stage torque converter having a maximum torque ratio of 2.5 to 3, a planetary gear device, An input shaft 5 for coupling the pump 2 of the torque converter and the sun gear 7 of the planetary gear set with a concentric shaft is provided and the input shaft is connected to the engine via the friction clutch 1, And the output shaft 6 of the torque converter that connects the ring gear 10 of the planetary gear unit and the turbine 3 of the torque converter on a concentric axis is connected to the pump 2 and the sun gear 7, And the power of the turbine 3 is transmitted to the ring gear 10. When the running speed of the vehicle reaches a certain traveling speed or when the ring gear 10 is rotated reversely (in a direction opposite to the engine rotation direction) Rotation) is reduced below a certain value , A band brake (11) is provided to apply a frictional force to the ring gear (10) until a point of time when the sun gear By connecting the rotation shaft of the transmission carrier 9 connected to the pinion gear 8 which is engaged with the gear 7 between the transmission 7 and the ring gear 10 to the input shaft 25 of the auxiliary transmission, The rotational force and the rotational speed of the torque converter are changed in accordance with the change of the rotational speed of the ring gear 10 and the rotational force of the ring gear 10 and the rotational speed of the ring gear 10 are changed in accordance with the change of the rotational force of the torque converter and the change of the frictional force of the band brake 11, An automatic transmission for a vehicle having a configuration in which the rotational force and the rotational speed of the carrier 9 are changed in accordance with the change of various factors described above.

However, in the automatic transmission for a vehicle, as in the above-described endless automatic transmission system, a band brake 1 that acts on a ring gear constituting the planetary gear set to reduce the reverse rotation speed of the ring gear is provided, There is still a problem that the configuration of the device for shifting of the vehicle is complicated. In addition, there is a system in which the shifting of the vehicle is effected while being affected by the change in the torque of the torque converter and the change in the frictional force of the band brake, And thus there is a problem in that a separate control mechanism for controlling the operation of the planetary gear set, such as the band brake, has to be installed.

(Patent Document 1) Korean Patent Publication No. 10-1995-0000045 "Unmanned Automatic Transmission Device"

(Patent Document 2) Korean Registered Patent Publication No. 10-0290390 entitled "

(Patent Document 3) Korean Registered Patent Publication No. 10-0801095 entitled "Unmanned Automatic Transmission"

(Patent Document 4) Korean Patent Laid-Open Publication No. 10-1996-0040756 "Automotive Automatic Transmission"

(Patent Document 5) Korean Patent Laid-Open Publication No. 10-1998-030064 "Automotive Stepless Transmission"

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above problems, and it is an object of the present invention to provide a planetary gear mechanism and a planetary gear mechanism that realize a shift module by a combination of a planetary gear mechanism and a fluid type power transmission mechanism (fluid clutch, torque converter, A planetary gear mechanism and a hydraulic power transmission mechanism are interlocked with the rotation speed of the vehicle engine shaft, which is controlled by an accelerator operated by a driver of the vehicle, A planetary gear mechanism constituting the speed change module and a new type of single planetary gear set in which a separate control mechanism for controlling the fluid type power transmission mechanism is not required, Speed automatic transmission system based on a transmission mechanism combination.

Particularly, the present invention relates to a single planetary gear set transmission unit comprising a sun gear, a planetary gear, a minimized component in which a single main planetary gear set in which a carrier is connected in a set pattern and a fluid power transmission mechanism (torque converter, fluid clutch, Speed automatic transmission system based on a combination of a single planetary gear set and a fluid power transmission mechanism capable of maximizing a transmission efficiency and a system stability through a super short-speed transmission module structure of the present invention.

Further, the present invention is a new type of single planetary gear set capable of additionally performing a shift function to forward and reverse, neutral, etc. by adding a speed increasing mechanism, a speed reducing mechanism, and a clutch to a single planetary gear set transmission unit. And an object of the present invention is to provide a combination-based continuously variable transmission system.

According to an aspect of the present invention for achieving the above object, the present invention provides a vehicular drive system for a vehicle, which is disposed between a vehicle engine shaft 2 connected to an engine 1 and an axle 3 connected to a drive wheel 4, And an accelerator operation module (40) which is composed of a speed change module (20) which is mounted on the vehicle and which is operated by pressing the foot of the driver and adjusts the number of revolutions of the vehicle engine shaft (2) The speed change module 20 is operated while the number of revolutions of the vehicle engine shaft 2 is changed by the accelerator 42 of the acceleration operation module 40 operated by the foot pressing operation to correspond to the number of revolutions of the vehicle engine shaft 2 The speed change module 20 is configured to transmit the torque from the vehicle engine shaft 2 to the vehicle 3 so that the torque is transmitted to the axle 3 so that the vehicle is stopped, The first sun gear S1, the first sun gear S1, A first ring gear R1 which meshes with the first planetary gear PL1 and transmits torque to the axle 3 and a first carrier C1 which is connected to the first planetary gear PL1, A main planetary gear set 241 having a configuration including a planetary gear set 241; A hydrodynamic power transmission mechanism 22 having a turbine T which is disposed forward or rearward of the first sun gear S1 and to which the pump P to which the first carrier C1 is coupled and the first ring gear R1 are coupled And a single planetary gear set transmission unit 20a composed of a single planetary gear set transmission unit 20a. The first ring gear R1 connected to the turbine T of the fluid power transmission mechanism 22 disposed at the rear of the first sun gear S1 is engaged with the axle coupling gear G1, G1 may be connected to the axle 3 to transmit the torque.

According to another aspect of the present invention for achieving the above object, the present invention is characterized in that the present invention is arranged between a vehicle engine shaft 2 connected to an engine 1 and an axle 3 connected to a drive wheel 4, And an accelerator operation module (40) which is composed of a shift module (20) for guiding the vehicle engine shaft (2) and an accelerator (42) The speed change module 20 is operated while the number of revolutions of the vehicle engine shaft 2 is changed by the accelerator 42 of the acceleration operation module 40 operated by the foot pushing operation of the vehicle engine shaft 2, Speed shift, high-speed travel, accelerated travel, decelerating travel, and parking for the vehicle while the corresponding torque is transmitted to the axle 3, the shift module 20 is configured to shift from the vehicle engine shaft 2 The first sun gear S1, the first sun gear S1, A first planetary gear PL1 meshing with the first sun gear S1 and a second planetary gear unit PL2 disposed forwardly spaced from the first planetary gear unit PL1 and integrally formed with the first planetary gear unit PL1, A second planetary gear set PL2 which is connected to the first sun gear S2 and meshed with the second sun gear S2 and is connected to the first planetary gear PL1 and spaced rearwardly of the first sun gear S1, A first planetary gear set (241) having a configuration including a first carrier (C1) for transmitting the first planetary gear set A fluid having a turbine (T) in which a pump (P) to which the second sun gear (S2) is coupled and a first carrier (C1) are coupled is provided in front of the first sun gear (S1) or in the rear of the second sun gear And a single planetary gear set transmission unit (20a) made up of a planetary gear mechanism (22). The present invention provides an automatic continuously variable transmission system based on a single planetary gear set-fluid power transmission mechanism combination. The first carrier C1 connected to the turbine T of the fluid type power transmission mechanism 22 disposed at the rear of the second sun gear S2 meshes with the axle connecting gear G1, May be connected to the axle 3 to transmit the torque.

According to another aspect of the present invention for achieving the above object, the present invention provides a vehicular drive system for a vehicle, which is disposed between a vehicle engine shaft 2 connected to an engine 1 and an axle 3 connected to a drive wheel 4, And an accelerator operation module (40) for adjusting the number of revolutions of the vehicle engine shaft (2), comprising a shift module (20) for guiding the vehicle engine shaft (2) and an accelerator (42) The speed change module 20 is operated while the number of revolutions of the vehicle engine shaft 2 is changed by the accelerator 42 of the acceleration operation module 40 operated by the driver's pushing operation of the driver so that the number of revolutions of the vehicle engine shaft 2 Speed shift, high-speed travel, accelerated travel, decelerating travel, and parking, while shifting the vehicle engine shaft 2 to the vehicle axle 2, A first sun gear S1, a first sun gear S1, And a first carrier C1 connected to the first planetary gear PL1 and a first carrier C1 engaged with the first planetary gear PL1 is connected to the axle 3, A main planetary gear set 241 for transmitting torque to the main planetary gear set 241; The pump P includes a pump P and a first carrier C1 integrally formed with the first sun gear S1 so as to be spaced apart from each other and coupled to the turbine T, And a single planetary gear set transmission unit (20a) comprising a fluid type power transmission mechanism (22) in which a second sun gear (S2) integrally formed with the first sun gear (S1) Gear set - fluid driven power transmission mechanism combination based on the automatic transmission system.

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In the continuously-variable automatic transmission system based on the single planetary gear set-fluid power transmission mechanism combination according to the present invention, the transmission module 20 is connected to the vehicle engine shaft 2 and the single planetary gear set transmission unit 20a A speed increasing mechanism 20b for increasing the RPM on the input side of the fluid type power transmission mechanism 22; And may further include a deceleration mechanism 20c connected to the single planetary gear set transmission unit 20a and the axle 3 so as to induce reduction of the RPM on the output side of the fluid type power transmission mechanism 22. [

In the continuously-variable automatic transmission system based on the single planetary gear set-fluid power transmission mechanism combination according to the present invention, the speed increasing mechanism 20b includes an engine-side first gear G1 coupled to the vehicle engine shaft 2, An engine-side second gear G2 that is spaced rearward from the first gear G1 and is integrally connected to the first sun gear S1 at the rear and has a smaller gear than the engine-side first gear G1, A gear of a gear which is composed of a double gear meshed with the first gear G1 and the second gear G2 on the engine side and meshing with the engine side second gear G2 rather than the gear meshed with the engine side first gear G1 And the reduction gear mechanism 20c may be spaced rearward from the first carrier C1 and may be composed of a first carrier C1 and a second carrier C1, An axle-side sun gear St connected integrally, an axle-side planetary gear PLt meshing with the axle-side sun gear St, An axle-side ring gear Rt which is engaged with the axle-side planetary gear PLt, an axle-side deceleration Rt integrally connected to the axle-side planetary gear PLt and an axle-side carrier Ct which is engaged with the axle 3 And a gear set 28.

The speed increasing mechanism 20b is provided with an engine side planetary gear PLe engaging with the vehicle engine shaft 2 and an engine side planetary gear PLe engaging with the engine side planetary gear PLe and integrally connected to the rear first sun gear S1, Side reduction gear set 26 including a sun gear Se and an engine side ring gear Re that engages with the engine side planetary gear PLe in a fixed state, Side first gear G3 and the axle-side first gear G3 that are integrally connected to the first carrier C1 so as to be spaced forward or rearward from the first carrier C1 and engage with the axle 3, And an axle-side reduction gear set 28 including an axle-side second gear G4 having a larger gear than the axle-side first gear G3. The axle-side reduction gear set 28 includes a main planetary gear set 241 May make the vehicle engine shaft 2 located in front of the first sun gear S1 connected to the first sun gear S1.

In the single planetary gear set-fluid power transmission mechanism combination-based continuously variable transmission system according to the present invention, the fluid power transmission mechanism 22 may be any one selected from a fluid clutch and a torque converter.

According to the single planetary gear set-fluid dynamic power transmission mechanism combination-based continuously variable transmission system according to the present invention, as the shift and torque are automatically implemented by the kinematic characteristics of the planetary gear mechanism, It is possible to construct a transmission system that does not require a separate brake mechanism for reducing the manufacturing cost. In addition, since the vehicle driver can freely implement the shift of the vehicle and the required drive torque by only the operation of the accelerator, the driver's driving ability is improved. In addition, since the vehicle can be shifted without interfering with a separate control mechanism, smooth driving performance is ensured, driving responsiveness of the vehicle is improved, and fuel economy of the vehicle is increased at the same time.

Particularly, according to the single-planetary gear set-fluid power transmission mechanism combination-based continuously variable transmission system according to the present invention, a single planetary gear set having a minimized component based on a combination of a single planetary gear set and a fluid- The transmission efficiency and the system stability can be maximized through the structure of the variable transmission unit. Further, the structure is simplified, the controller of the pulley type continuously variable transmission system is not required, and the number of gears and clutches is minimized compared with a general automatic transmission, thereby reducing the manufacturing cost of the system.

1 is a configuration diagram of a conventional continuously variable automatic transmission system;
2 is a configuration diagram of a conventional automatic transmission for a vehicle;
3 is a block diagram illustrating the configuration of a single planetary gearset-fluid power transmission mechanism combination based endless automatic transmission system according to the present invention;
4 is a block diagram illustrating a configuration of a single planetary gear set-fluid power transmission mechanism combination-based continuously variable transmission system according to the present invention, to which an acceleration mechanism, a reduction mechanism, and a clutch are added;
FIG. 5A is a diagram illustrating a configuration of a single planetary gear set-fluid dynamic power transmission mechanism-based continuously variable automatic transmission system according to a first embodiment of the present invention; FIG.
FIG. 5 (b) is a view illustrating a configuration of a single planetary gear set-fluid power transmission mechanism combination based endless automatic transmission system according to a second embodiment of the present invention; FIG.
FIG. 6A is a diagram illustrating a configuration of a single planetary gear set-fluid power transmission mechanism-based continuously variable automatic transmission system according to a third embodiment of the present invention; FIG.
FIG. 6 (b) is a view showing a configuration of a single planetary gear set-fluid power transmission mechanism-based continuously variable automatic transmission system according to a fourth embodiment of the present invention;
FIG. 7 is a diagram illustrating a configuration of a single planetary gear set-fluid power transmission mechanism-based, continuously variable automatic transmission system according to a fifth embodiment of the present invention;
FIG. 8 is a view illustrating a configuration of a single planetary gear set-fluid power transmission mechanism combination based endless automatic transmission system according to a sixth embodiment of the present invention; FIG.
FIG. 9 is a graph for illustrating the relationship between vehicle speed and RPM in a single-planetary gear set-fluid power transmission mechanism combination based endless automatic transmission system according to the first embodiment of the present invention; FIG.
10 is a graph showing the relationship between vehicle speed and torque in a continuously variable automatic transmission system based on a single planetary gear set-fluid power transmission mechanism combination 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 3 to 10. On the other hand, in the drawings and the detailed description, there is shown in the drawings a structure and a function which can be easily recognized by those skilled in the art from a general vehicle transmission, an automatic transmission, a continuously variable transmission, a fluid clutch, a torque converter, a planetary gear mechanism, And references are abbreviated or omitted. In the drawings and specification, there are shown in the drawings and will not be described in detail, and only the technical features related to the present invention are shown or described only briefly. Respectively.

The single planetary gear set-fluid power transmission mechanism combination-based continuously variable transmission system 100 according to the present invention comprises a configuration including a speed change module 20 and an acceleration operation module 40 as shown in FIG.

The shift module 20 is disposed between the vehicle engine shaft 2 connected to the engine 1 and the axle 3 connected to the drive wheel 4 to induce a shift of the vehicle. Such a shift module 20 includes a planetary gear mechanism 24 and a hydraulic power transmission mechanism 22.

The planetary gear mechanism 24 includes a main planetary gear set 241 to which a plurality of sun gears, planet gears, and carriers are connected in a set connection pattern. The planetary gear set 24 includes only a single main planetary gear set 241 Speed transmission gear set 26, the axle-side reduction gear set 28, and the clutch 30, as shown in Fig. 4, so as to be applied to the continuously-variable transmission system of various industrial machines, .

The fluid power transmission mechanism 22 includes a pump 222 and a turbine 224 connected to the components of the planetary gear mechanism 24, respectively, and a fluid clutch, a torque converter, or the like may be used.

The accelerating operation module 40 includes an accelerator 42 mounted on the vehicle and operated by a foot pressing operation of the driver to adjust the rotational speed of the vehicle engine shaft 2. [

The single-speed automatic transmission system 100 based on the combination of the single planetary gear set and the fluid power transmission mechanism according to the present invention is constructed by the accelerator 42 of the acceleration operation module 40, which is operated by the foot pressing operation of the driver, The speed change module 20 is operated and the torque corresponding to the rotation number of the vehicle engine shaft 2 is transmitted to the axle 3 while the number of revolutions of the shaft 2 is changed so that the vehicle is stopped, , Decelerating driving, and shifting for parking.

The planetary gear mechanism 24 of the speed change module 20 according to the present invention comprises only a single main planetary gear set 241 as shown in Fig. 3, and the speed change module 20 is constituted by a single main planetary gear set 241 and the fluid type power transmission mechanism 22, as shown in Fig. Alternatively, the speed change module 20 may be configured such that the speed increasing mechanism 20b, the speed reducing mechanism 20c, and the clutch 30 are connected to the single planetary gear set transmission 20a as shown in FIG. Here, the speed increasing mechanism 20b is connected to the vehicle engine shaft 2 and the single planetary gear set transmission unit 20a, respectively, thereby inducing an increase in the input side RPM of the fluid power transmission mechanism 22. [ The deceleration mechanism 20c is connected to the single planetary gear set transmission unit 20a and the axle 3, respectively, and leads to reduction of the RPM on the output side of the fluid power transmission mechanism 22. [ The speed increasing mechanism 20b and the speed reducing mechanism 20c may be formed of various gear sets. In addition to the speed increasing mechanism 20b and the decelerating mechanism 20c, a clutch 26 may be additionally provided to further perform a shifting function for forward, backward, neutral, and the like.

The main planetary gear set 241 constituting the single planetary gear set transmission unit 20a according to the present invention may be composed of a 2K-H planetary gear set. The main planetary gear set 241 includes a first sun gear S1 receiving torque from the vehicle engine shaft 2, a first planetary gear PL1 engaged with the first sun gear S1, a first planetary gear set PL1 And the first ring gear R1 and the first carrier C1 that engage with the first planetary gears PL1 transmit torque to the axle 3 Lt; / RTI >

The fluid power transmission mechanism 22 constituting the single planetary gear set transmission unit 20a according to the present invention comprises a pump P and a turbine T and includes a pump P and a turbine T The first sun gear S1 and the second sun gear S2 are integrally formed with the first sun gear S1 so that the first sun gear S2 and the first sun gear S2 are coupled to each other or the first carrier C1 and the first sun gear R1 are engaged have.

Here, the main planetary gear set 241 of the single planetary gear set transmission unit 20a according to the first embodiment of the present invention includes a first planetary gear set 241 that receives torque from the vehicle engine shaft 2 as shown in Fig. 5 (a) A first planetary gear PL1 meshing with the first sun gear S1 and a second planetary gear set PL2 which is disposed forward from the first planetary gear PL1, A second planetary gear PL2 which is integrally connected to the first planetary gear PL1 and meshed with the second sun gear S2 and is spaced rearwardly of the first sun gear S1, And a first carrier C1 integrally connected to the axle 3 and transmitting torque to the axle 3. [ Here, the first planetary gearset PL1 and the second planetary gearset PL2 are of a double gear type in which gears are arranged in two rows and are used as idle gears.

The fluid power transmission mechanism 22 of the single planetary gear set transmission unit 20a according to the first embodiment of the present invention comprises a torque converter disposed in front of the first sun gear S1, but a fluid clutch may be used . The pump P of the fluid type power transmission mechanism 22 is coupled to the second sun gear S2 and the turbine T of the fluid type power transmission mechanism 22 is coupled to the first carrier C1. The torque is increased between the pump P to which the second sun gear S2 is connected and the turbine T to which the first carrier C1 is connected and the increased torque is transmitted to the axle 3 via the first carrier C1 .

The shift module 20 according to the first embodiment of the present invention includes the first sun gear S1 of the main planetary gear set 241 as an input and the first carrier C1 as an output, The intermediate power transmission function and the power shutoff function are performed. The power of the vehicle engine shaft 2 is transmitted to the torque converter via the first sun gear S1 and the second sun gear S2 of the main planetary gear set 241 and is transmitted from the torque converter to the main planetary gear set 241 And is output to the axle 3 while being transmitted back to the first carrier C1.

In the meantime, it is possible to add a forward / reverse gear to the shift module 20 according to the first embodiment of the present invention to perform the continuously-variable shifting function, or to add various functions such as a parking brake.

The main planetary gear set 241 of the single planetary gear set transmission unit 20a according to the second embodiment of the present invention includes a first planetary gear set 241 that receives torque from the vehicle engine shaft 2 as shown in Fig. A sun gear S1, a first planetary gear PL1 meshing with the first sun gear S1, a first ring gear R1 meshing with the first planetary gear PL1 and transmitting torque to the axle 3, And the first carrier C1 connected to the first planetary gear PL1 and the fluid power transmission mechanism 22 is disposed in front of or behind the first sun gear S1 and the first carrier C1 And a turbine T to which the pump P and the first ring gear R1 are coupled.

The single planetary gear set transmission unit 20a according to the first embodiment of the present invention and the single planetary gear set transmission unit 20a according to the second embodiment of the present invention have the same structure as that of the main planetary gear set 241 The second sun gear S1 of the single planetary gear set transmission unit 20a according to the first embodiment of the present invention in which the first sun gear S1 with a small torque is input and the largest torque of the main planetary gear set 241 is applied, The first planetary gear set S2 and the first carrier C1 of the single planetary gear set transmission unit 20a according to the second embodiment of the present invention are connected to the pump P of the fluid power transmission mechanism 22, The first carrier C1 of the single planetary gear set transmission unit 20a according to the first embodiment of the present invention and the single planetary gear set transmission unit 20a according to the second embodiment of the present invention, Is connected to the turbine T of the fluid power transmission mechanism 22 and the axle 3 .

Herein, the single planetary gear set transmission 20a according to the first embodiment of the present invention and the single planetary gear set transmission 20a according to the second embodiment of the present invention have the same configuration as that of Fig. 6 (a) And (b).

The single planetary gear set transmission unit 20a according to the third embodiment of the present invention shown in Fig. 6 (a) has the arrangement configuration of the single planetary gear set transmission unit 20a according to the first embodiment of the present invention Conversely, the first carrier C1, which is connected to the turbine T of the fluid type power transmission mechanism 22 disposed at the rear of the second sun gear S2, is engaged with the axle connecting gear G1, And the gear G1 is connected to the axle 3 to transmit the torque.

The single planetary gear set transmission unit 20a according to the fourth embodiment of the present invention shown in Figure 6 (b) has the arrangement configuration of the single planetary gear set transmission unit 20a according to the second embodiment of the present invention Conversely, the first ring gear R1, which is connected to the turbine T of the fluid type power transmission mechanism 22 disposed behind the first sun gear S1, is engaged with the axle connecting gear G1, The connecting gear G1 is connected to the axle 3 to transmit the torque.

On the other hand, the main planetary gear set 241 according to the first embodiment of the present invention described above can be analyzed as follows.

First, the rotation ratio and the torque ratio of the main planetary gear set 241 according to the first embodiment of the present invention are as follows.

[Rotation Ratio Formula]

[Torque ratio formula]

(t _C "is the reaction force of the first carrier (C1) with respect to t _s1 )

Here, the RPM variation and the torque variation of the transmission module 20 in which the gear ratio i1 is set as follows are as follows. First, if the initial ω _C = 0,

When _S1 = 1 ω days, and the _{ω S2 = ω P = 1 /} i1 = 1 / 2.829 = 0.3535, is the ω _T = ω _C = 0 is the input portion idle.

[Gear ratio]

Starting after ω _S1 = 1 is always constant, but the output side the first carrier (C1) of the torque (t _C) is input a first sun gear (S1) of the torque (t _S1) the torque is less than the output side the first carrier been increasing in the ( C1 starts to rotate, and the rotation speed [omega] _C of the first carrier C1 gradually increases. When the rotation speed [omega] _C of the first carrier C1 starts to increase [rotation ratio formula]

(Ω _S2 = ω _P , ω _T = ω _C ) of each component of the speed change module 20 is also increased by the speed change module 20 and the RPM of all the components of the speed change module 20 becomes equal to ω _S1 The whole main planetary gear set 241 and the whole of the fluid type power transmission mechanism 22 are rotated integrally. 9 shows the RPM variation of the shift module 20 component described above (described above).

Here, the efficiency of the torque converter

(e is the rotational speed, and y is the torque increasing ratio). The efficiency of the torque converter increases as the rotational ratio becomes relatively large. That is, as the value of ω _C increases, the values of ω _P and ω _T also increase, and the torque ratio (e) of the torque converter also increases.

On the other hand, when the input torque of the first sun gear S1 of the main planetary gear set 241 is t _S1 = 1, the [torque ratio modification]

The torque transmitted to the second sun gear S2 is increased by the gear ratio i1 = 2.829 and the torque of the second sun gear S2 is input to the pump P of the torque converter and then increased by the value of the torque multiplication factor y And transmitted to the turbine (T) of the torque converter. The turbine T of the torque converter transfers the increased torque to the first carrier C1 of the main planetary gear set 241 to be output through the axle 3. [

Here, the torque of the output-side first carrier C1 in the initial stop state in which the output is braked (fixed) is t _C = ∞, and idling by the fluid of the torque converter when t _S1 is small. This allows the torque converter to function as a power disconnect. The torque of the input side first sun gear S1 is t _S1 = 1 and the reaction force torque of the output side first carrier C1 is

The torque of the second sun gear S2 becomes t _S2 = i1 * t _S1 = 2.829 * 1 = 2.829.

On the other hand, the torque relation of the torque converter is as follows.

(y is the torque multiplication value of the torque converter according to the rotation ratio e, y = 2.25 in the embodiment of the present invention, t _C 'is the torque transmitted by the turbine of the torque converter to the output-side first carrier C1)

And the output torque is derived by the following [output torque expression].

[Output torque formula]

If the torque multiplication (y> 1) of the torque converter in the above-mentioned output torque Formulas, the total output torque is increased (t _C> t _S1), and, if y = 1 the output torque can know that t _C = t _S1. Here, since the variable i1, y values, _C t value is also larger becomes larger, thereby increasing the variable i1, y values in order to increase the target value _C t.

After the first transmission module 20 works, t _C value is less than the desired t _C value, the ω _C values increased from the rotation rate equation], it grows to an e value of the torque converter (e = 0 -> e = 1) y The value decreases from y = 2.25 until y = 1, and t _C = t _S1 becomes smaller as the value of t _C becomes smaller in [Output torque expression]. That is always ω _S1 = 0, when a constant input to the _S1 t = 1, the output is _{ω c = 0, t c =} 4.54 (y = 1, i1 = 2.829 in the input side

) Is changed until ω _c = ω _S1 = 1 and t _c = t _s1 = 1. 10 shows the torque variation of the shift module 20 component described above (described above).

On the other hand, when the torque converter is a clutch point, y = 1 and t _c = t _s1 = 1. This torque converter is increased accordingly [Talk unqualified] to give i1 gear ratio of the main planetary gear set (241) in t _s1 + t _c "= t _s2 increasing the pump (P) input torque of the torque converter, and The turbine (T) torque

And the torque of the output-side first carrier is

So that it is possible to obtain an increased torque by 1+ (y-1) * i1 than the input torque t _s1 .

On the other hand, the torque calculation formula of the torque converter is as follows. As the pump RPM becomes larger, the pump torque of the torque converter becomes larger.

[Torque Converter Torque Calculation Formula]

(t _P : pump torque, D _p : pump outer diameter, C: vehicle capacity coefficient, ω _P : pump RPM)

In the continuously variable automatic transmission system 100 according to the first embodiment of the present invention, when the pump RPM of the torque converter gradually increases, the component force at the output side is received without increasing the engine horsepower at the input side, and the horsepower of the torque converter is increased . This increased horsepower increases the speed of the vehicle by itself. Even when the resistance of the output side increases, the turbine RPM of the torque converter itself becomes small, and the output side resistance becomes corresponding to the output side resistance even if the input side does not change.

Meanwhile, in the continuously variable automatic transmission system 100 according to the first embodiment of the present invention, since the pump RPM of the torque converter is operated at a lower RPM than the vehicle engine at the time of the initial system operation by using the gear ratio of i1 for increasing the torque of the torque converter And a gear set of a gear ratio 1 / i0 is additionally provided on the input side, it is possible to induce stable transmission of the power of the hydraulic power transmission mechanism 22. [ In this case, the RPM of the entire system becomes high. By additionally providing a gear set of the gear ratio i0 at the output side, the RPM of the entire system can be prevented from being increased, and the torque increase can be maintained.

For this purpose, the speed change module 20 of the single planetary gear set-fluid power transmission mechanism combination-based endless automatic transmission system 100 according to another embodiment of the present invention includes a speed change mechanism 20b, The speed increasing gear set 26 and the axle-side reduction gear set 28 which is the speed reducing mechanism 20c are additionally provided.

The engine-side speed increasing gear set 26 constituting the speed increasing mechanism 20b is configured to include the engine-side first gear G1, the engine-side second gear G2, and the counter shaft gear CSG.

The first gear G1 on the engine side is engaged with the vehicle engine shaft 2 and engaged with the front gear of the counter shaft gear CSG.

The second gear G2 on the engine side is spaced rearward from the first gear G1 on the engine side and is integrally connected to the first sun gear S1 on the rear side so that a gear smaller than the first gear G1 on the engine side . The engine-side second gear G2 engages with the rear gear of the counter shaft gear CSG.

The counter shaft gear CSG is composed of a double gear meshed with the engine-side first gear G1 and the engine-side second gear G2, The gears of the rear gear engaged with the second gear G2 are formed to be large so that the speed increase can be continued.

The axle-side reduction gear set 28 constituting the deceleration mechanism 20c includes the axle-side sun gear St, the axle-side planetary gear PLt, the axle-side ring gear Rt, and the axle-side carrier Ct .

The axle-side sun gear St is disposed rearwardly from the first carrier C1 and integrally connected to the first carrier C1.

The axle-side planetary gear PLt meshes with the axle-side sun gear St, and the axle-side ring gear Rt meshes with the axle-side planetary gear PLt.

The axle-side carrier Ct is integrally connected to the axle-side planetary gear PLt and coupled to the axle 3.

Meanwhile, the speed change module 20 of the single-speed planetary gear set-fluid power transmission mechanism-based combined endless automatic transmission system 100 according to another embodiment of the present invention is configured such that the plurality of clutches CL①, CL②, CL③, And is disposed in the axle-side reduction gear set 28 constituting the mechanism 20c so that it can be applied to the continuously variable transmission of the vehicle. When CL ?, CL ?, CL ?, and CL? Is released and CL? And CL? Are combined, forward shifting is performed. When CL? And CL? Are engaged and CL? And CL? Are released, reverse shifting is performed.

The speed change module 20 of the single-speed planetary gear set-fluid power transmission mechanism combination-based endless automatic transmission system 100 according to another embodiment of the present invention may include the speed change mechanism 20b The engine side speed increasing gear set 26 is connected to the engine side planetary gear PLe and the engine side planetary gear PLe which are engaged with the vehicle engine shaft 2 and are integrally connected to the rear first sun gear S1. A side sun gear Se and an engine side ring gear Re that engages with the engine side planetary gear PLe in a fixed state.

The axle-side reduction gear set 28 constituting the deceleration mechanism 20c includes an axle-side first gear G3 which is disposed forwardly or rearwardly from the first carrier C1 and integrally connected to the first carrier C1, , And an axle-side second gear G4 which is engaged with the axle-side first gear G3 and is engaged with the axle 3 and has a larger gear than the axle-side first gear G3 . Herein, the main planetary gear set 241 of the shift module 20 may be configured such that the vehicle engine shaft 2 located in front of the first sun gear S1 is connected to the first sun gear S1.

In the transmission module 20 of the single-speed planetary gear set-fluid power transmission mechanism combination based on the alternative embodiment of the present invention, the clutches CL, CL, and CL are connected to the speed reduction mechanism 20c Side reduction gear set 28 constituting the rear-wheel-side reduction gear set 28 of the vehicle. The third gear G5 on the axle side is disposed in front of the first gear G3 on the axle side so as to be engaged or disengaged with each other via CL5 for realizing the forward and rearward and neutral states and the third gear G5, The fourth gear G6 and the fifth gear G7 on the axle side are engaged with each other via the axle 3 and CL6 so that the axle side second gear G4 is connected to the axle 3 To be connected.

The single-planetary gear set-fluid power transmission mechanism combination-based endless automatic transmission system 100 according to the first embodiment of the present invention as described above includes the fluid power transmission mechanism 24 (fluid clutch, torque converter, etc.) Even when the shift module 20 is implemented in combination with the shift mechanism 20 and a separate brake mechanism or clutch mechanism for controlling the operation of the planetary gear mechanism 24 constituting the speed change module 20 is not provided A configuration for automatically controlling the operation of the planetary gear mechanism 24 and the hydraulic power transmission mechanism 22 in conjunction with the rotation speed of the vehicle engine shaft 2 controlled by the accelerator 42 It is not necessary to provide a separate control mechanism for controlling the planetary gear mechanism 24 and the fluid type power transmission mechanism 22 constituting the speed change module 20. In particular, the single planetary gear set-fluid power transmission mechanism combination-based continuously variable transmission system 100 according to the first embodiment of the present invention includes a sun gear, a planetary gear, a single main planetary gear set 241 Speed transmission module structure of the single planetary gear set transmission unit 20a made up of the minimized components in which the hydraulic power transmission mechanism 22 (torque converter, fluid clutch, etc.) is combined with the hydraulic power transmission mechanism 22 .

Although the single-planetary gear set-fluid power transmission mechanism combination-based continuously variable transmission system according to the first embodiment of the present invention as described above has been described according to the above description and drawings, It will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit of the invention.

1: engine 2: vehicle engine shaft
3: axle 4: drive wheel
10: housing 20: shift module
20a: single planetary gear set transmission unit 20b: speed increasing mechanism
20c: deceleration mechanism 22: fluid power transmission mechanism
P: Pump T: Turbine
24: planetary gear mechanism 241: main planetary gear set
26: engine-side speed increasing gear set 28: axle-side reduction gear set
30: clutch 40: acceleration operation module
42: Accelerator 100: Automatic automatic transmission system

Claims

A shift module 20 disposed between an axle 2 of a vehicle engine connected to the engine 1 and an axle 3 connected to the drive wheel 4 to induce a shift of the vehicle,
And an accelerator operation module (40) which is installed on the vehicle and which is operated by a pushing operation of a driver and adjusts the number of revolutions of the vehicle engine shaft (2)
The speed change module 20 is operated while the number of revolutions of the vehicle engine shaft 2 is changed by the accelerator 42 of the acceleration operation module 40 operated by the driver's pushing operation of the driver so that the number of revolutions of the vehicle engine shaft 2 Speed running, accelerated running, decelerating running, and parking are carried out while the torque corresponding to the vehicle speed is transmitted to the axle 3,
The transmission module 20 includes:
A first sun gear S1 that receives torque from the vehicle engine shaft 2, a first planetary gear PL1 that meshes with the first sun gear S1, a second sun gear S1 that meshes with the first planetary gear PL1, A main planetary gear set 241 having a configuration including a first ring gear R1 for transmitting torque and a first carrier C1 connected to a first planetary gear PL1;
A hydrodynamic power transmission mechanism 22 having a turbine T which is disposed forward or rearward of the first sun gear S1 and to which the pump P to which the first carrier C1 is coupled and the first ring gear R1 are coupled And a single planetary gear set transmission unit (20a) made up of a single planetary gear set transmission unit (20a).

The method according to claim 1,
The first ring gear R1 connected to the turbine T of the fluid type power transmission mechanism 22 disposed at the rear of the first sun gear S1 is engaged with the axle connecting gear G1, Is connected to the axle (3) to transmit the torque. A single planetary gear set - a hydrodynamic power transmission mechanism combination-based, continuously variable transmission system.

A shift module 20 disposed between an axle 2 of a vehicle engine connected to the engine 1 and an axle 3 connected to the drive wheel 4 to induce a shift of the vehicle,
And an accelerator operation module (40) which is installed on the vehicle and which is operated by a pushing operation of a driver and adjusts the number of revolutions of the vehicle engine shaft (2)
The speed change module 20 is operated while the number of revolutions of the vehicle engine shaft 2 is changed by the accelerator 42 of the acceleration operation module 40 operated by the driver's pushing operation of the driver so that the number of revolutions of the vehicle engine shaft 2 Speed running, accelerated running, decelerating running, and parking are carried out while the torque corresponding to the vehicle speed is transmitted to the axle 3,
The transmission module 20 includes:
A first sun gear S1 that receives torque from the vehicle engine shaft 2; a second sun gear S2 that is disposed integrally with and spaced apart from the first sun gear S1; a second planetary gear S2 that meshes with the first sun gear S1, A second planetary gear set PL2 disposed forwardly from the first planetary gearset PL1 and integrally connected to the first planetary gearset PL1 and engaged with the second sun gear S2, And a first carrier (C1) arranged behind the sun gear (S1) and connected to the first planetary gear (PL1) and transmitting torque to the axle (3);
A fluid having a turbine (T) in which a pump (P) to which the second sun gear (S2) is coupled and a first carrier (C1) are coupled is provided in front of the first sun gear (S1) or in the rear of the second sun gear And a single planetary gear set transmission unit (20a) made up of a planetary gear mechanism (22). The single planetary gear set - a hydrodynamic power transmission mechanism combination-based, continuously variable transmission system.

The method of claim 3,
The first carrier C1 connected to the turbine T of the fluid type power transmission mechanism 22 disposed at the rear of the second sun gear S2 meshes with the axle connecting gear G1, Is connected to the axle (3) to transmit the torque. A single planetary gear set - a hydrodynamic power transmission mechanism combination-based, continuously variable transmission system.

A shift module 20 disposed between an axle 2 of a vehicle engine connected to the engine 1 and an axle 3 connected to the drive wheel 4 to induce a shift of the vehicle,
And an accelerator operation module (40) which is installed on the vehicle and which is operated by a pushing operation of a driver and adjusts the number of revolutions of the vehicle engine shaft (2)
The speed change module 20 is operated while the number of revolutions of the vehicle engine shaft 2 is changed by the accelerator 42 of the acceleration operation module 40 operated by the driver's pushing operation of the driver so that the number of revolutions of the vehicle engine shaft 2 Speed running, accelerated running, decelerating running, and parking are carried out while the torque corresponding to the vehicle speed is transmitted to the axle 3,
The transmission module 20 includes:
A first sun gear S1 that receives torque from the vehicle engine shaft 2, a first planetary gear PL1 that meshes the first sun gear S1, a first carrier C1 that is connected to the first planetary gear PL1, , A main planetary gear set (241) having a first carrier (C1) engaged with the first planetary gear (PL1) for transmitting torque to the axle (3);
The first carrier C1 is coupled to the pump P and the turbine T is integrally formed with the first sun gear S1 so as to be spaced apart from the first carrier C1. And a single planetary gear set transmission unit (20a) made up of a fluid type power transmission mechanism (22) to which the second sun gear (S2) is coupled. The single planetary gear set Transmission system.

6. The method according to any one of claims 1 to 5,
The transmission module 20 includes:
An acceleration mechanism 20b connected to the vehicle engine shaft 2 and the single planetary gear set transmission unit 20a, respectively, for inducing an increase in input RPM of the fluid power transmission mechanism 22;
Further comprising a deceleration mechanism (20c) connected to the single planetary gear set transmission unit (20a) and the axle (3), respectively, for inducing a decrease in RPM on the output side of the fluid type power transmission mechanism (22) Gear Set - A combination of fluid power transmission mechanism and unmanned automatic transmission system.

The method according to claim 6,
The speed increasing mechanism 20b includes an engine side first gear G1 coupled to the vehicle engine shaft 2 and a first gear G1 disposed rearwardly from the engine side first gear G1 and integrally connected to the rear first sun gear S1 Side second gear G2 having a smaller gear than the engine-side first gear G1, and a double gear meshed with the engine-side first gear G1 and the engine-side second gear G2, And an engine-side speed increasing gear set 26 including a counter shaft gear CSG in which gears meshed with the engine-side second gear G2 are formed to be larger than gears meshed with the first gear G1 ,
The decelerating mechanism 20c includes an axle-side sun gear St which is disposed behind the first carrier C1 and is integrally connected to the first carrier C1, an axle-side planetary gear Side planetary gear PLt and an axle-side ring gear Rt which is engaged with the axle-side planetary gear PLt and an axle-side carrier Ct which is integrally connected to the axle- And the axle-side reduction gear set (28). The single-planetary gear set-fluid power transmission mechanism combination-based, continuously variable transmission system according to claim 1,

The method according to claim 6,
The speed increasing mechanism 20b includes an engine side planetary gear PLe coupled to the vehicle engine shaft 2 and an engine side sun gear SEa that engages with the engine side planetary gear PLe and is integrally connected to the rear first sun gear S1. Side accelerating gear set 26 including an engine-side ring gear Re that engages with the engine-side planetary gear PLe in a fixed state,
The deceleration mechanism 20c includes a first gear G3 disposed on the first carrier C1 and spaced forward or rearward from the first carrier C1 and integrally connected to the first carrier C1, And an axle-side reduction gear set 28 including an axle-side second gear G4 coupled to the axle 3 and having a larger gear than the axle-side first gear G3,
The main planetary gear set 241 of the shift module 20 causes the vehicle engine shaft 2 located in front of the first sun gear S1 to be connected to the first sun gear S1. Unmanned automatic transmission system based on fluid power transmission mechanism.

The method according to claim 6,
The fluid power transmission mechanism (22) is any one selected from a fluid clutch and a torque converter. The single planetary gear set-fluid dynamic power transmission mechanism combination based on the automatic transmission system.