KR102048910B1 - Multistage auto-transmission apparatus of vehicles using dog clutch - Google Patents

Abstract

The present invention relates to a multi-gear automatic transmission of a vehicle using a dog clutch comprising: four planetary gears to change an output rotation number in accordance with a gear ratio; two carriers including a first carrier connecting a first pinion gear of a first planetary gear and a second pinion gear of a second planetary gear, and a second carrier connecting a third pinion gear of a third planetary gear and a fourth pinion gear of a fourth planetary gear; two clutches disconnecting or connecting power of an input shaft to a first or a second transfer shaft; nine dog clutches to block or transfer power to a linear gear of a corresponding planetary gear or a corresponding carrier, and limit rotation of a first or a third linear gear or the first or the second carrier; and an output shaft connected to a second ring gear of the second planetary gear and a fourth ring gear of the fourth planetary gear connected to each other. Clutch drag loss can be prevented in a gear-shifting process and a gear-shifting feel can be improved by quickly shifting gears without power disconnection.

Description

Multi-speed automatic transmission of vehicle using dog clutch {MULTISTAGE AUTO-TRANSMISSION APPARATUS OF VEHICLES USING DOG CLUTCH}

The present invention relates to a multi-stage automatic transmission of a vehicle using a dog clutch. More specifically, the engine output is controlled from 1 to 7 forward by using four planetary gears, two clutches, two carriers, and nine dog clutches. It is about shifting to reverse 1st stage.

In general, an automatic transmission of a vehicle includes a shift control unit that automatically adjusts a shift ratio according to a traveling speed and a load of the vehicle.

The shift control unit adjusts the output rotation speed of the automatic transmission including the planetary gear by activating or releasing a plurality of clutches and brakes installed in the gear train.

On the other hand, at least two planetary gear units and at least five friction elements must be installed to design a power train capable of outputting a gear ratio of 4 forward speeds and 1 reverse speed. The above planetary gear system, seven friction elements and three one-way clutches should be used, and more gears and clutches, etc., should be installed in order to achieve a total speed of eight speeds in the gearbox.

However, the design of such a gear train has a problem that the structure is complicated and the weight is also increased. Especially, when the components for the 8-speed implementation are installed inside the gearbox, the gear train is combined with the clutch and planetary gear combinations in the existing gearbox. Since many parts, such as planetary gears and clutches, must be installed, the weight increases with the number of parts for the shifting element, and the capacity of the gearbox increases.

In addition, since the conventional automatic transmission has a finite number of gear stages, a shift shock is inevitably generated during shifting, and the operating range of the engine is limited by a finite number of gear ratios, and thus there is a limit to maximize fuel efficiency and power performance.

Accordingly, research and development are being made continuously to improve shift performance by enabling shifting in multiple stages without increasing the size and weight of the transmission.

In Patent Document 1 below, by installing a separate preceding shifting means consisting of a combination of planetary gears on the output side of the torque converter, it is possible to realize a multi-speed shift of a total of four forward speeds and eight speeds while changing the input speed in the existing gearbox. As a transmission means is installed in a torque converter, a multistage automatic transmission for a vehicle is disclosed, which can realize a reduction in the number of parts and a weight in an existing gearbox.

The multi-stage automatic transmission for vehicles of Patent Literature 1 is equipped with a first planetary gear set consisting of a simple planetary gear set on the output side of a torque converter, and a complex planetary gear set in which two simple planetary gear sets are combined in a gearbox of an automatic transmission. In one embodiment, a shift stage of 8 forward speeds and 2 reverse speeds is realized through the preceding two-speed control of the torque converter output speed.

Republic of Korea Patent Publication No. 10-2007-01114859 (Published 05 December 2007)

On the other hand, the existing automatic transmission uses a wet multi-plate clutch for shifting.

The wet multi-plate clutch connects the two shafts on or off, and when it is turned off, transmission oil remains between the multiple clutch plates, so the clutch cannot be completely released. This part of the connection occurs, which causes a loss of the transmission, commonly referred to as clutch drag loss.

The present invention is to solve the problem of the multi-stage automatic transmission of the vehicle according to the prior art, the purpose of which is to prevent the loss of the transmission by preventing drag loss generated during the connection process and release process of the clutch It is to provide a multi-stage automatic transmission of a vehicle using a clutch.

It is another object of the present invention to provide a multi-stage automatic transmission of a vehicle using a dog clutch that can improve shift performance by eliminating power interruption in the shifting process.

In order to achieve the above object, the multi-stage automatic transmission of the vehicle using the dog clutch according to the present invention comprises four planetary gears for changing the output rotation speed in accordance with the gear ratio; A first carrier connecting the first pinion gear of the first planetary gear and the second pinion gear of the second planetary gear, and a second connecting the third pinion gear of the third planetary gear and the fourth pinion gear of the fourth planetary gear. Two carriers of the carrier; Two clutches which connect or disconnect the power of the input shaft to the first transmission shaft or the second transmission shaft; The first sun gear of the first planetary gear, the second sun gear of the second planetary gear, the fourth sun gear of the fourth planetary gear, or the second sun gear of the second planetary gear and the third sun gear and the fourth planetary gear of the third planetary gear Nine dog clutches which transmit or block power to the fourth sun gear or the first carrier and the second carrier and limit the rotation of the first sun gear or the third sun gear or the first carrier or the second carrier; And an output shaft connected to the second ring gear of the second planetary gear and the fourth ring gear of the fourth planetary gear connected to each other.

In the multi-stage automatic transmission of a vehicle using a dog clutch according to the present invention, among the four planetary gears, the first planetary gear and the third planetary gear are single pinion planetary gears, and the second planetary gear and the fourth planetary gear are double pinion planetary gears. The first ring gear of the first planetary gear and the second ring gear of the second planetary gear are integrally formed, and the third ring gear of the third planetary gear and the fourth ring gear of the fourth planetary gear are integrally formed. It is characterized by.

In the multi-stage automatic transmission of a vehicle using a dog clutch according to the present invention, among the nine dog clutches, a first dog clutch is installed between the first transmission shaft and the second sun gear, and the second dog clutch is provided with the first transmission shaft and the first transmission shaft. It is installed between one carrier, the third dog clutch is installed between the first transmission shaft and the first sun gear, the fourth dog clutch is installed between the first fixed base and the first sun gear, and the fifth dog clutch is second It is installed between the fixed base and the first carrier, the sixth dog clutch is installed between the second transmission shaft and the fourth sun gear, the seventh dog clutch is installed between the second transmission shaft and the second carrier, and the eighth dog The clutch is installed between the third fixed base and the third sun gear, and the ninth dog clutch is installed between the fourth fixed base and the second carrier.

In the multi-stage automatic transmission of a vehicle using a dog clutch according to the present invention, among the nine dog clutches, a first dog clutch is installed between the first transmission shaft and the second sun gear, and the second dog clutch is provided with the first transmission shaft and the first transmission shaft. It is installed between one carrier, the third dog clutch is installed between the first fixed base and the first sun gear, the fourth dog clutch is installed between the second fixed base and the first carrier, and the fifth dog clutch is second It is installed between the transmission shaft and the fourth sun gear, the sixth dog clutch is installed between the second transmission shaft and the second carrier, the seventh dog clutch is installed between the third fixed base and the third sun gear, and the eighth dog A clutch is installed between the fourth fixed base and the second carrier, and a ninth dog clutch is installed between the second transmission shaft and the third sun gear.

According to the multi-stage automatic transmission of a vehicle using a dog clutch according to the present invention, since the rotation of the first transmission shaft and the second transmission shaft is transmitted to the planetary gear through the dog clutch, the drag power loss generated in the clutch connection and disconnection process is lost. It is possible to prevent the power loss of the transmission can be prevented, the power transmission efficiency is increased as well as there is an effect that can be more smoothly shifted.

According to the multi-stage automatic transmission of the vehicle using the dog clutch according to the present invention, since the dog clutch of the gear stage to be shifted can be connected in advance before disconnecting one clutch and connecting the other clutch, the gear shift is performed quickly without power disconnection. Being able to perform, of course, there is an effect that can improve the feeling of shifting.

1 is a block diagram of a multi-stage automatic transmission of a vehicle using a dog clutch according to a first embodiment of the present invention,
2A is a front one-step power transmission state diagram of a multi-stage automatic transmission of a vehicle using a dog clutch according to the first embodiment;
FIG. 2B is a preselection forward two-speed power transmission state diagram of a multi-stage automatic transmission of a vehicle using a dog clutch according to the first embodiment; FIG.
2C is a front two-stage power transmission state diagram of a multi-stage automatic transmission of a vehicle using a dog clutch according to the first embodiment;
FIG. 2D is a preselection forward three-speed power transmission state diagram of a multi-stage automatic transmission of a vehicle using a dog clutch according to the first embodiment; FIG.
2E is a three-speed forward power transmission state diagram of a multi-stage automatic transmission of a vehicle using a dog clutch according to the first embodiment;
2F is a pre-selection forward four-speed power transmission state diagram of a multi-stage automatic transmission of a vehicle using a dog clutch according to the first embodiment;
2G is a forward four-speed power transmission state diagram of a multi-stage automatic transmission of a vehicle using a dog clutch according to the first embodiment;
FIG. 2h is a preselection forward five-speed power transmission state diagram of a multi-stage automatic transmission of a vehicle using a dog clutch according to the first embodiment; FIG.
2i is a five-speed forward power transmission state diagram of the multi-stage automatic transmission of the vehicle using the dog clutch according to the first embodiment;
FIG. 2J is a diagram showing a pre-selected forward six-speed power transmission state of the multi-stage automatic transmission of the vehicle using the dog clutch according to the first embodiment; FIG.
2K is a sixth forward power transmission state diagram of a multistage automatic transmission of a vehicle using a dog clutch according to the first embodiment;
FIG. 2L is a preselection forward seven-speed power transmission state diagram of a multi-stage automatic transmission of a vehicle using a dog clutch according to the first embodiment; FIG.
2m is a seventh forward power transmission state diagram of a multi-stage automatic transmission of a vehicle using a dog clutch according to the first embodiment;
FIG. 2N is a reverse single-stage power transmission state diagram of a multi-stage automatic transmission of a vehicle using a dog clutch according to the first embodiment; FIG.
3 is a block diagram of a multi-stage automatic transmission of a vehicle using a dog clutch according to a second embodiment of the present invention.

Hereinafter, a multi-speed automatic transmission of a vehicle using a dog clutch according to the present invention will be described in detail with reference to the accompanying drawings.

Hereinafter, "upward", "downward", "forward" and "rear" and other directional terms are defined based on the states shown in the figures.

1 is a block diagram of a multi-stage automatic transmission of a vehicle using a dog clutch according to a first embodiment of the present invention.

In the multi-stage automatic transmission of the vehicle using the dog clutch according to the first embodiment of the present invention, four planetary gears (11 to 14), two carriers (Ca1 and Ca2), two clutches (C1 to C2), and nine Dog clutches (Dog1 to Dog9) are included.

The planetary gears 11 to 14 change the output rotation speed according to the gear ratio.

Among the four planetary gears 11 to 14, the first planetary gear 11 and the third planetary gear 13 are a single pinion planetary gear (SPPG), and the second planetary gear 12 and the fourth planetary gear (SPPG). The planetary gear 14 is a double pinion planetary gear (DPPG).

The first planetary gear 11 includes a first sun gear S1, a first pinion gear P1, and a first ring gear R1, and the second planetary gear 12 includes a second sun gear S2, 2. Second pinion gear P2 and second ring gear R2.

The third planetary gear 13 includes a third sun gear S3, a third pinion gear P3, and a third ring gear R3, and the fourth planetary gear 14 includes a fourth sun gear S4 and 2. Four fourth pinion gear P4 and fourth ring gear R4.

The first ring gear R1 of the first planetary gear 11 and the second ring gear R2 of the second planetary gear 12 are integrally formed, and the third ring gear of the third planetary gear 13 R4) and the fourth ring gear R4 of the fourth planetary gear 14 are also integrally formed.
The second ring gear R2 and the fourth ring gear R4 are connected to each other and are connected to the output shaft 130.

Among the two carriers Ca1 and Ca2, the first carrier Ca1 connects the first pinion gear P1 of the first planetary gear 11 and the second pinion gear P2 of the second planetary gear 12. The second carrier Ca2 connects the third pinion gear P3 of the third planetary gear 13 to the fourth pinion gear P4 of the fourth planetary gear 14.

Two clutches C1 to C2 are provided on the engine power input shaft 110, and the first transmission shaft acting on the first planetary gear 11 and the second planetary gear 12 to rotate the engine power input shaft 110. It connects to or disconnects from the second transmission shaft 122 acting on the 121 or the third planetary gear 13 and the fourth planetary gear 14.

Among the two clutches C1 to C2, the first clutch C1 is connected to or separated from the first transmission shaft 121, and the second clutch C2 is connected to or separated from the second transmission shaft 122.

Nine dog clutches Dog1-Dog9 are the first sun gear S1 of the first planetary gear 11 and the second sun gear S2 of the second planetary gear 12 and the fourth of the fourth planetary gear 14. Power is transmitted or interrupted to the sun gear S4 or the first carrier Ca1 and the second carrier Ca2, and the first sun gear S1 or the third sun gear S3 or the first carrier Ca1 or the second carrier Limit the rotation of Ca2.

Of the nine dog clutch Dog1 to Dog9, the first dog clutch Dog1 is installed between the first transmission shaft 121 and the second sun gear S2, and the rotation of the first transmission shaft 121 is performed by the second sun gear. It serves to deliver or separate to (S2).

The second dog clutch Dog2 is installed between the first transmission shaft 121 and the first carrier Ca1 and transmits or separates the rotation of the first transmission shaft 121 to the first carrier Ca1. do.

The third dog clutch Dog3 is installed between the first transmission shaft 121 and the first sun gear S1, and serves to transmit or separate the rotation of the first transmission shaft 121 to the first sun gear S1. do.

The fourth dog clutch Dog4 is installed between the first fixed base 131 and the first sun gear S1 and serves to limit the rotation of the first sun gear S1.

The fifth dog clutch Dog5 is installed between the second fixed base 132 and the first carrier Ca1 and serves to limit the rotation of the first carrier Ca1.

The sixth dog clutch Dog6 is installed between the second transmission shaft 122 and the fourth sun gear S4, and serves to transfer or separate the rotation of the second transmission shaft 122 to the fourth sun gear S4. do.

The seventh dog clutch Dog7 is installed between the second transmission shaft 122 and the second carrier Ca2, and serves to transfer or separate the rotation of the second transmission shaft 122 to the second carrier Ca2. do.

The eighth dog clutch Dog8 is installed between the third fixed base 133 and the third sun gear S3, and serves to limit rotation of the third sun gear S3.

The ninth dog clutch Dog9 is installed between the fourth fixing base 134 and the second carrier Ca2 and serves to limit the rotation of the second carrier Ca2.

The multi-stage automatic transmission of the vehicle according to the first embodiment of the present invention is a gear by changing the operation of two clutches (C1, C2) and nine dog clutches (Dog1 to Dog9) that connect or disconnect power. The gear is shifted from 1st forward to 7th forward and 1st backward.

Table 1 below shows the operating states of the clutch and the dog clutch according to the gear stage.

In the multi-stage automatic transmission of the vehicle using the dog clutch according to the first embodiment of the present invention, the first clutch C1 is operated at 1 forward, 3 forward, 5 forward, 7 forward, and 1 reverse. The second clutch C2 is operated in two forward, four forward and six forward stages.

The first dog clutch (Dog1) is operated in the first forward, three forward, five forward, five forward, the second dog clutch (Dog2) is operated in the five forward, seventh forward, the third dog clutch (Dog3) The first dog clutch (Dog4) is operated in three forward and seventh forward gears, and the fifth dog clutch (Dog5) is operated in one forward and one reverse gears, and the sixth dog clutch ( Dog6) is operated in 2 forward and 4 forward gears, 7th dog clutch (Dog7) is operated in 6 forward gears, 8th dog clutch (Dog9) is operated in 4 forward gears and 6 forward gears, 9th The dog clutch Dog9 is operated in two forward stages.

In the multi-stage automatic transmission of the vehicle using the dog clutch according to the first embodiment of the present invention, the first planetary gear 11, the second planetary gear 12, and the second transmission shaft that are connected to the first transmission shaft 121. All of the third planetary gear 13 and the fourth planetary gear 14 connected to the 122 are shifted by a combination of four planetary gears, and the gear ratio is the number of gear teeth of each planetary gear 11 to 14. Is calculated according to.

For example,

Zs1: Number of first sun gear teeth of first planetary gear,

Zr1: Number of first ring gear teeth of first planetary gear,

Zs2: Number of second sun gear teeth of second planetary gear,

Zr2: Number of second ring gear teeth of second planetary gear,

Zs3: Number of third sun gear teeth of third planetary gear,

Zr3: Number of third ring gear teeth of third planetary gear,

Zs4: Number of fourth sun gear teeth of fourth planetary gear,

Zr4: Number of fourth ring gear teeth of fourth planetary gear,

When the gear ratio according to the gear stage is calculated as shown in Table 2, examples of the gear ratio calculation is shown in Tables 2 to 4.

As an example, the range of the gear ratio according to the gear stage in the multi-speed automatic transmission of the vehicle using the dog clutch according to the first embodiment of the present invention ranges from 2.8621 to 0.6184 for the forward shift, and -1.6207 for the reverse shift.

2A is a front one-step power transmission state diagram of the multi-stage automatic transmission of the vehicle according to the first embodiment.

In the first forward stage, the first clutch C1, the first dog clutch Dog1, and the fifth dog clutch Dog5 are operated.

Power of the engine power input shaft 110 is transmitted to the first transmission shaft 121 through the first clutch C1 in the first forward stage, and is transmitted to the second sun gear S2 through the first dog clutch Dog1. The second pinion gear P2 is transferred to the second ring gear R2, and the second wheel gear R2 is transferred to the driving wheel through the output shaft 130 connected to the second ring gear R2.

In the first forward stage, rotation of the first carrier Ca1 is limited through the fifth dog clutch Dog5.

Conventional transmission operates a hydraulic system for operating two or more clutches to form a forward 1 stage, drag power loss occurs by the two or more clutches that do not operate power transmission efficiency is reduced, but the present invention When the first forward stage is configured as described above, a hydraulic system is required to operate only one first clutch C1, and the power transmission efficiency is improved because drag power loss occurs only in the second clutch C2.

FIG. 2B is a diagram illustrating a pre-selection forward two-speed power transmission state of the multi-stage automatic transmission of the vehicle using the dog clutch according to the first embodiment; FIG.

The preselection forward 2nd stage is a state in which only the dog clutch corresponding to the forward 2nd stage is connected in advance as the first forward stage.

In the second stage of the preselection forward, the first clutch C1, the first dog clutch Dog, the fifth dog clutch Dog5, the sixth dog clutch Dog6, and the ninth dog clutch Dog9 are operated.

In the second stage of the preselect forward 2, the sixth dog clutch Dog6 and the ninth dog clutch Dog9 are operated, but the second clutch C2 transmitting power to the second transmission shaft 122 is released. The transmission status is the same as that of the forward 1 stage.

When the forward two-speed shift is required from the first forward stage when the two stages of the preselect forward two stages are completed, when the first clutch C1 is released and the second clutch C2 is connected, the second forward gear is shifted to the second forward stage.

When shifting using only the dog clutch, the engine and the transmission must be temporarily disconnected, which gives the driver an unpleasant feeling that the engine power is cut off and the vehicle is slowed down. Since the dog clutches Dog6 and Dog9 constituting the second forward stage and the second clutch C2 connecting the engine are released, the dog clutches constituting the second forward stage in the process of traveling in the first forward stage ( Dog6, Dog9) can be activated in advance. In this case, when shifting from the first forward gear to the second forward gear, the first clutch C1 is released and at the same time, the second clutch C2 is connected.

FIG. 2C is a front two-speed power transmission state diagram of the multi-stage automatic transmission of the vehicle using the dog clutch according to the first embodiment; FIG.

In the second forward stage, the second clutch C2, the sixth dog clutch Dog6, and the ninth dog clutch Dog9 are operated.

The power of the engine power input shaft 110 is transmitted to the second transmission shaft 122 through the second clutch C2 in the second forward gear, and is transmitted to the fourth sun gear S4 through the sixth dog clutch Dog6. The fourth pinion gear P4 is transferred to the fourth ring gear R4, and the fourth wheel gear R4 is transferred to the driving wheel through the output shaft 130 connected to the fourth ring gear R4.

In the second forward stage, rotation of the second carrier Ca2 is restricted through the ninth dog clutch Dog9.

Conventional transmissions operate a hydraulic system for operating two or more clutches to constitute two forward speeds, and drag power loss occurs due to two or more clutches that do not operate, thereby reducing power transmission efficiency. When the two forward stages are configured as described above, a hydraulic system is required to operate only one second clutch C2, and power transmission efficiency is improved because drag power loss occurs only in the first clutch C1.

FIG. 2D is a diagram illustrating a pre-selected forward three-speed power transmission state of the multi-stage automatic transmission of the vehicle using the dog clutch according to the first embodiment; FIG.

The pre-selection forward 3rd stage is a state in which only the dog clutch corresponding to the forward 3rd stage is connected in advance while driving forward 2nd stage.

In the third stage of the preselection forward, the second clutch C2, the sixth dog clutch Dog6, the ninth dog clutch Dog9, the first dog clutch Dog1, and the fourth dog clutch Dog4 are operated.

In the pre-selection forward three stages, the first dog clutch Dog1 and the fourth dog clutch Dog4 are operated, but the first clutch C1 transmitting power to the first transmission shaft 121 is released. The transmission status is the same as that of the forward two stages.

When the third forward gear shift is required in the second forward gear when the three forward preselection is completed, the second clutch C2 is released and the first clutch C1 is connected to the third forward gear.

When shifting using only the dog clutch, the engine and the transmission must be temporarily disconnected, which gives the driver an unpleasant feeling that the engine power is cut off and the vehicle is slowed down. Since the first clutch C1 connecting the engine and the dog clutches Dog1 and Dog4 constituting the 3rd forward stage are released, the dog clutches constituting the 3rd forward stage in the process of traveling forward 2nd stage ( Dog1, Dog4) can be activated in advance. In this case, when shifting from the 2nd forward to the 3rd forward, the second clutch C2 is released and at the same time, the first clutch C1 is connected, thereby enabling a fast shift.

Figure 2e is a three-speed forward power transmission state diagram of the multi-stage automatic transmission of the vehicle using the dog clutch according to the first embodiment.

In the third forward stage, the first clutch C1, the first dog clutch Dog1, and the fourth dog clutch Dog4 are operated.

The power of the engine power input shaft 110 is transmitted to the first transmission shaft 121 through the first clutch C1 in the third forward gear, and is transmitted to the second sun gear S2 through the first dog clutch Dog1. The second pinion gear P2 is transferred to the second ring gear R2, and the second wheel gear R2 is transferred to the driving wheel through the output shaft 130 connected to the second ring gear R2.

Some power transmitted from the third forward gear to the second ring gear R2 is transmitted to the first ring gear R1, and then is transmitted from the first ring gear R1 to the first pinion gear P1 and the first ring gear R1. A power cycle occurs from the pinion gear P1 to the second pinion gear P2 and from the second pinion gear P2 to the second ring gear R2.

In the third forward stage, rotation of the first sun gear S1 is limited through the fourth dog clutch Dog4.

Existing transmission operates a hydraulic system for operating two or more clutches to form a three-stage forward, drag power loss occurs by two or more clutches that do not operate power transmission efficiency is reduced, but the present invention When the three forward stages are configured as described above, a hydraulic system is required to operate only one first clutch C1, and the power transmission efficiency is improved because drag power loss occurs only in the second clutch C2.

FIG. 2F is a pre-selected forward four-speed power transmission state diagram of a multi-stage automatic transmission of a vehicle using a dog clutch according to the first embodiment; FIG.

The preselect 4 forward gears are pre-connected with the dog clutch corresponding to the 4 forward gears in advance.

In the fourth stage of the preselect forward, the first clutch C1, the first dog clutch Dog1, the fourth dog clutch Dog4, the sixth dog clutch Dog6, and the eighth dog clutch Dog8 are operated.

In the fourth preselection forward, the sixth dog clutch Dog6 and the eighth dog clutch Dog8 are operated, but the second clutch C2 transmitting power to the second transmission shaft 122 is released. The transmission status is the same as that of the third forward.

When the forward four-speed shift is required from the forward three-step in the state in which the pre-select forward four-speed is completed, when the first clutch C1 is released and the second clutch C2 is connected, the fourth forward speed is shifted.

When shifting using only the dog clutch, the engine and the transmission must be temporarily disconnected, which gives the driver an unpleasant feeling that the engine power is cut off and the vehicle is slowed down. Since the dog clutches Dog6 and Dog8 constituting the fourth forward stage are released and the second clutch C2 connecting the engine is released, the dog clutches constituting the fourth forward stage in the process of driving forward three stages ( Dog6, Dog8) can be activated in advance. In this case, when shifting from the third forward to the fourth forward, the first clutch C1 is released and at the same time, the second clutch C2 is connected to the second clutch C2.

Figure 2g is a four-speed forward power transmission state diagram of the multi-stage automatic transmission of the vehicle using the dog clutch according to the first embodiment.

In the fourth forward stage, the second clutch C2, the sixth dog clutch Dog6, and the eighth dog clutch Dog8 are operated.

The power of the engine power input shaft 110 is transmitted to the second transmission shaft 122 through the second clutch C2 in the fourth forward gear, and is transmitted to the fourth sun gear S4 through the sixth dog clutch Dog6. The fourth pinion gear P4 is transferred to the fourth ring gear R4, and the fourth wheel gear R4 is transferred to the driving wheel through the output shaft 130 connected to the fourth ring gear R4.

Some of the power transmitted from the fourth forward gear to the fourth ring gear R4 is transmitted to the third ring gear R3, and then transferred from the third ring gear R3 to the third pinion gear P3, and the third Power cycle is transmitted from the pinion gear (P3) to the fourth pinion gear (P4), and from the fourth pinion gear (P4) to the fourth ring gear (R4).

In the fourth forward gear, rotation of the third sun gear S3 is restricted through the eighth dog clutch Dog8.

Conventional transmission operates a hydraulic system for operating two or more clutches to form a four-speed forward, drag power loss occurs due to two or more clutches that do not work, power transmission efficiency is reduced, but the present invention When the four forward stages are configured as described above, a hydraulic system is required to operate only one second clutch C2, and the power transmission efficiency is improved because drag power loss occurs only in the first clutch C1.

FIG. 2H is a pre-selected forward five-speed power transmission state diagram of a multi-stage automatic transmission of a vehicle using a dog clutch according to the first embodiment; FIG.

The preselect 5 forward gears are pre-connected with only the dog clutch corresponding to the 5 forward gears while driving as the 4 forward gears.

In the fifth preselection forward stage, the second clutch C2, the sixth dog clutch Dog6, the eighth dog clutch Dog8, the first dog clutch Dog1, and the second dog clutch Dog2 are operated.

In the fifth preselection forward, the first dog clutch Dog1 and the second dog clutch Dog2 are operated, but the first clutch C1 transmitting power to the first transmission shaft 121 is released. The transmission status is the same as that of the 4th forward.

When the 5th forward gear shift is required from the 4th forward gear when the 5th forward select is completed, the second clutch C2 is released and the first clutch C1 is connected to shift the 5th forward gear.

When shifting using only the dog clutch, the engine and the transmission must be temporarily disconnected, which gives the driver an unpleasant feeling that the engine power is cut off and the vehicle is slowed down. Since the dog clutches Dog1 and Dog2 constituting the five forward stages and the first clutch C1 connecting the engine are released, the dog clutches constituting the five forward stages in the process of driving forward four stages ( Dog1, Dog2) can be activated in advance. In this case, when shifting from the 4th forward to the 5th forward, the second clutch C2 is released and at the same time, the first clutch C1 is connected to the first clutch C1, thereby enabling a fast shift.

2I is a five-speed forward power transmission state diagram of the multi-stage automatic transmission of the vehicle using the dog clutch according to the first embodiment.

In the fifth forward stage, the first clutch C1, the first dog clutch Dog1, and the second dog clutch Dog2 are operated.

The power of the engine power input shaft 110 is transmitted to the first transmission shaft 121 through the first clutch C1 in the fifth forward gear, and is transmitted to the second sun gear S2 through the first dog clutch Dog1. The second pinion gear P2 is transferred to the second ring gear R2, and the second wheel gear R2 is transferred to the driving wheel through the output shaft 130 connected to the second ring gear R2.

In addition, the power of the engine power input shaft 110 transmitted to the first transmission shaft 121 through the first clutch C1 in the fifth forward stage is transmitted to the first carrier Ca1 through the second dog clutch Dog2. Then, it is transmitted to the second ring gear (R2) through the second pinion gear (P2), and is transmitted to the driving wheel through the output shaft 130 connected to the second ring gear (R2).

 In the fifth forward stage, the power of the engine power input shaft 110 is transmitted to the first transmission shaft 121 through the first clutch C1, and the power of the first transmission shaft 121 is transmitted to the first dog clutch Dog1 and the first transmission shaft 121. The engine power transmitted to the second dog clutch Dog2 and the second sun gear S2 through the first dog clutch Dog1 and the second dog clutch Dog2 are transferred to the first carrier Ca1. The power is combined and transmitted to the second ring gear R2 and the output shaft 130 and the driving wheel.

Existing transmission operates a hydraulic system for operating two or more clutches to form a five-speed forward, drag power loss occurs due to two or more clutches that do not operate, the power transmission efficiency is reduced, but the present invention When the five forward stages are configured as described above, a hydraulic system is required to operate only one first clutch C1, and the power transmission efficiency is improved because drag power loss occurs only in the second clutch C2.

FIG. 2J is a diagram illustrating a pre-selected forward six-speed power transmission state of the multi-stage automatic transmission of the vehicle using the dog clutch according to the first embodiment. FIG.

The preselect six forward gears are pre-connected with the dog clutch corresponding to the six forward gears while driving forward.

In the sixth stage of the preselection forward, the first clutch C1, the first dog clutch Dog1, the second dog clutch Dog2, the seventh dog clutch Dog7, and the eighth dog clutch Dog8 are operated.

In the sixth step of the pre-selection forward sixth stage, the seventh dog clutch Dog7 and the eighth dog clutch Dog8 are operated, but the second clutch C2 transmitting power to the second transmission shaft 122 is released. The transmission status is the same as that of the fifth forward.

If the 6th forward gear shift is required in the 5th forward gear when the 6th forward select is completed, the first clutch C1 is released and the second clutch C2 is connected to shift the 6th forward gear.

When shifting using only the dog clutch, the engine and the transmission must be temporarily disconnected, which gives the driver an unpleasant feeling that the engine power is cut off and the vehicle is slowed down. Since the dog clutches Dog7 and Dog8 constituting the sixth forward gear and the second clutch C2 connecting the engine are released, the dog clutches constituting the sixth forward gear in the process of driving the fifth forward gear ( Dog7, Dog8) can be activated in advance. In this case, when shifting from the 5th forward to the 6th forward, the first clutch C1 is released and at the same time, the second clutch C2 is connected.

2K is a sixth forward power transmission state diagram of the multi-stage automatic transmission of the vehicle using the dog clutch according to the first embodiment.

In the sixth forward stage, the second clutch C2, the seventh dog clutch Dog7, and the eighth dog clutch Dog8 are operated.

In six forward stages, the power of the engine power input shaft 110 is transmitted to the second transmission shaft 122 through the second clutch C2, and is transmitted to the second carrier Ca2 through the seventh dog clutch Dog7. The third pinion gear P3 is transferred to the third ring gear R3, and the output wheel 130 is connected to the driving wheel through the output shaft 130 connected to the third ring gear R3.

In the sixth forward gear, rotation of the third sun gear S3 is limited through the eighth dog clutch Dog8.

Existing transmission operates a hydraulic system for operating two or more clutches to form a six-speed forward, drag power loss occurs by two or more clutches that do not operate, the power transmission efficiency is reduced, but the present invention When the six forward stages are configured as described above, a hydraulic system is required to operate only one second clutch C2, and the power transmission efficiency is improved because drag power loss occurs only in the first clutch C1.

FIG. 2L is a preselected forward seven-speed power transmission state diagram of the multi-stage automatic transmission of the vehicle using the dog clutch according to the first embodiment; FIG.

The preselect 7th forward is the 6th forward and only the dog clutch corresponding to the 7th forward is connected in advance.

In the seventh stage of the preselect forward, the second clutch C2, the seventh dog clutch Dog7, the eighth dog clutch Dog8, the second dog clutch Dog2, and the fourth dog clutch Dog4 are operated.

The 7th pre-selection forward forward stage is in a state in which the second dog clutch Dog2 and the fourth dog clutch Dog4 are operated, but the first clutch C1 transmitting power to the first transmission shaft 121 is released. The transmission status is the same as that of six forward gears.

When the 7th forward gear shift is required from the 6th forward gear when the 7th preselection forward gear is completed, the second clutch C2 is released and the first clutch C1 is connected to the 7th forward gear.

When shifting using only the dog clutch, the engine and the transmission must be temporarily disconnected, which gives the driver an unpleasant feeling that the engine power is cut off and the vehicle is slowed down. Since the dog clutches Dog2 and Dog4 constituting the seventh forward stage and the first clutch C1 connecting the engine are released, the dog clutches constituting the seventh forward stage in the process of driving forward sixth stage ( Dog2, Dog4) can be activated in advance. In this case, when shifting from the sixth forward gear to the seventh forward gear, the second clutch C2 is released and at the same time, the first clutch C1 is connected.

2m is a seventh forward power transmission state diagram of a multi-stage automatic transmission of a vehicle using a dog clutch according to the first embodiment.

In the seventh forward stage, the first clutch C1, the second dog clutch Dog2, and the fourth dog clutch Dog4 are operated.

In the seventh forward gear, the power of the engine power input shaft 110 is transmitted to the first transmission shaft 121 through the first clutch C1, and is transmitted to the first carrier Ca1 through the second dog clutch Dog2. The first pinion gear P1 is transferred to the first ring gear R1, and the first wheel gear R1 is transferred to the driving wheel through the output shaft 130 connected to the first ring gear R1.

In the seventh forward gear, rotation of the first sun gear S1 is restricted through the fourth dog clutch Dog4.

Existing transmission operates a hydraulic system for operating two or more clutches to form a seven-speed forward, drag power loss occurs due to two or more clutches that do not operate power transmission efficiency is reduced, but the present invention When the seven forward stages are configured as described above, a hydraulic system is required to operate only one first clutch C1, and the power transmission efficiency is improved because drag power loss occurs only in the second clutch C2.

FIG. 2N is a reverse single-stage power transmission state diagram of a multistage automatic transmission of a vehicle using a dog clutch according to the first embodiment; FIG.

When reverse is required, the dog clutch corresponding to the 1st reverse gear is connected, and the 1st clutch is connected, and the 1st gear shift is completed.

The reverse stage 1 is a state in which the first clutch C1, the third dog clutch Dog3, and the fifth dog clutch Dog5 are operated.

The power of the engine power input shaft 110 is transmitted to the first transmission shaft 121 through the first clutch C1 in the reverse stage 1, and is transmitted to the first sun gear S1 through the third dog clutch Dog3. The first pinion gear P1 is transferred to the first ring gear R1, and the first wheel gear R1 is transferred to the driving wheel through the output shaft 130 connected to the first ring gear R1.

In the reverse stage 1, the rotation of the first carrier Ca1 is restricted through the fifth dog clutch Dog5.

Existing transmission operates a hydraulic system for operating two or more clutches to form a reverse 1 stage, drag power loss occurs by the two or more clutches that do not operate, the power transmission efficiency is reduced, but the present invention When the first stage is configured as described above, a hydraulic system is required to operate only one first clutch C1, and the power transmission efficiency is improved because drag power loss occurs only in the second clutch C2.

As described above, the multi-stage automatic transmission of the vehicle using the dog clutch according to the first embodiment of the present invention is shifted from one forward to seven forward and one reverse.

In the multi-stage automatic transmission of the vehicle using the dog clutch according to the first embodiment of the present invention, the normal shift during acceleration is 1 step forward-2 steps preselection 2 steps forward-2 steps forward-3 steps forward-3 steps forward- Preselection 4th forward-4th forward-Preselect 5th forward-5th forward-Preselect 6th forward-6th forward-Preselect 7th forward-7th forward Silver 7th forward-Preselect 6th forward-6th forward-Preselect 5th forward-5th forward-Preselect 4th forward-4th forward-Preselt 3rd forward-3rd forward-Preselect 2nd forward -2nd forward-Preselect 1st forward-1st forward.

The transmission of the zone operates a hydraulic system for operating two or more clutches to constitute a desired stage, and drag power loss occurs due to two or more clutches that do not operate, thereby reducing power transmission efficiency. The hydraulic system is required to operate only one clutch, so the energy consumption is relatively small, and the power transmission efficiency is improved because the drag power loss occurs only in one clutch.

3 is a block diagram of a multi-stage automatic transmission of a vehicle using a dog clutch according to a second embodiment of the present invention.

In the multi-stage automatic transmission apparatus of the vehicle using the dog clutch according to the second embodiment of the present invention, four planetary gears 11 to 14, two carriers Ca1 and Ca2, and two clutches are used as in the first embodiment. (C1-C2) and nine dog clutches (Dog1-Dog9) are included.

 In the multi-stage automatic transmission of the vehicle using the dog clutch according to the second embodiment of the present invention, the first clutch C1 is installed between the input shaft 110 and the first transmission shaft 121 as in the first embodiment. The first planetary gear 11 and the second planetary gear 12 are connected to the first transmission shaft 121, and the second clutch C2 is disposed between the input shaft 110 and the second transmission shaft 122. The third planetary gear 13 and the fourth planetary gear 14 are provided on the second transmission shaft 122.

Among the nine dog clutches Dog1 to Dog9 of the multi-stage automatic transmission of the vehicle using the dog clutch according to the second embodiment of the present invention, the first dog clutch Dog1 includes the first transmission shaft 121 and the second sun gear ( Installed between S2), and serves to transmit or separate the rotation of the first transmission shaft 121 to the second sun gear (S2).

The second dog clutch Dog2 is installed between the first transmission shaft 121 and the first carrier Ca1 and transmits or separates the rotation of the first transmission shaft 121 to the first carrier Ca1. do.

The third dog clutch Dog3 is installed between the first fixed base 131 and the first sun gear S1 and serves to limit the rotation of the first sun gear S1.

The fourth dog clutch Dog4 is installed between the second fixed base 132 and the first carrier Ca1 and serves to limit the rotation of the first carrier Ca1.

The fifth dog clutch Dog5 is installed between the second transmission shaft 122 and the fourth sun gear S4, and serves to transfer or separate the rotation of the second transmission shaft 122 to the fourth sun gear S4. do.

The sixth dog clutch Dog6 is installed between the second transmission shaft 122 and the second carrier Ca2, and serves to transfer or separate the rotation of the second transmission shaft 122 to the second carrier Ca2. do.

The seventh dog clutch Dog7 is installed between the third fixed base 133 and the third sun gear S3, and serves to limit rotation of the third sun gear S3.

The eighth dog clutch Dog8 is disposed between the fourth fixed base 134 and the second carrier Ca2 and serves to limit the rotation of the second carrier Ca2.

The ninth dog clutch Dog9 is installed between the second transmission shaft 122 and the third sun gear S3, and serves to transfer or separate the rotation of the second transmission shaft 122 to the third sun gear S3. do.

In the multi-stage automatic transmission apparatus of the vehicle using the dog clutch according to the second embodiment of the present invention, in the above-described first embodiment, the position of the third dog clutch Dog3 provided on the first transmission shaft 121 is determined by the second transmission shaft. It has the form moved to 122.

Table 5 shows the operating states of the clutch and the dog clutch according to the gear stage in the multi-stage automatic transmission of the vehicle using the dog clutch according to the second embodiment of the present invention.

As shown in Table 5, in the multi-stage automatic transmission of the vehicle using the dog clutch according to the second embodiment of the present invention, the first clutch C1, the first dog clutch Dog1, and the fourth dog clutch Dog4 at the first forward stage are shown. The second clutch C2, the fifth dog clutch Dog5 and the eighth dog clutch Dog8 are operated in the forward two stages, and the first clutch C1 and the first dog clutch in the third forward stage are operated. Dog1), the third dog clutch (Dog3) is operated, the second clutch C2, the fifth dog clutch (Dog5), the seventh dog clutch (Dog7) is operated in the fourth forward, the first dog in the fifth forward The clutch C1, the first dog clutch Dog1 and the second dog clutch Dog2 are operated, and the second clutch C2, the sixth dog clutch Dog6, and the seventh dog clutch Dog7 in six forward stages. The first clutch C1, the second dog clutch Dog2 and the third dog clutch Dog3 are operated in the forward seventh stage, and the second clutch C2 and the eighth dog clutch Dog8), the ninth dog clutch Dog9 is activated.

As described above, the multi-stage automatic transmission of the vehicle using the dog clutch according to the present invention can improve the shifting performance while preventing clutch drag loss by shifting the vehicle in multiple stages using a dog clutch generally used in a manual transmission. .

In addition, the multi-stage automatic transmission of the vehicle using the dog clutch according to the present invention by using the two clutches (C1, C2) to simultaneously perform the release of one clutch and the connection of the other clutch to a shift stage in which the shift is completed in advance. You can shift quickly without powering off.

As mentioned above, although the invention made by the present inventor was demonstrated concretely according to the said Example, this invention is not limited to the said Example and can be variously changed in the range which does not deviate from the summary.

11 ~ 14: Planetary Gear
S1 ~ S4: Sun Gear
P1-P4: Pinion Gear
R1 ~ R4: Ring Gear
C1, C2: clutch
Dog1 ~ Dog9: Dog Clutch
Ca1, Ca2: Carrier
110: input shaft
121: first transmission shaft
122: second transmission shaft
130: output shaft

Claims (4)

Four planetary gears 11 to 14 for changing the output rotation speed in accordance with the gear ratio;
First carrier Ca1 and third planetary gear 13 that connect the first pinion gear P1 of the first planetary gear 11 and the second pinion gear P2 of the second planetary gear 12. Two carriers Ca1 and Ca2 of a second carrier Ca2 connecting the third pinion gear P3 and the fourth pinion gear P4 of the fourth planetary gear 14;
Two clutches C1 and C2 connecting or disconnecting the power of the input shaft 110 to the first transmission shaft 121 or the second transmission shaft 122;
The first sun gear S1 of the first planetary gear 11 and the second sun gear S2 of the second planetary gear 12 and the fourth sun gear S4 of the fourth planetary gear 14 or the second planetary gear ( 12, the third sun gear S3 of the second sun gear S2 and the third planetary gear 13, the fourth sun gear S4 of the fourth planetary gear 14, or the first carrier Ca1 and the second carrier. 9 dog clutches Dog1 to which power is applied to or disconnected from Ca2 and restricts rotation of the first sun gear S1 or the third sun gear S3 or the first carrier Ca1 or the second carrier Ca2. Dog9);
A dog clutch, comprising: an output shaft 130 connected to the second ring gear R2 of the second planetary gear 12 and the fourth ring gear R4 of the fourth planetary gear 14 connected to each other; Multi-speed automatic transmission of the vehicle using. The method of claim 1,
Among the four planetary gears 11 to 14, the first planetary gear 11 and the third planetary gear 13 are a single pinion planetary gear (SPPG), and the second planetary gear 12 and the fourth planetary gear (SPPG). The planetary gear 14 is a double pinion planetary gear (DPPG),
The first ring gear R1 of the first planetary gear 11 and the second ring gear R2 of the second planetary gear 12 are integrally formed, and the third ring gear of the third planetary gear 13 ( R3) and the fourth ring gear (R4) of the fourth planetary gear (14) is integrally composed of a dog clutch, characterized in that the vehicle is a dog clutch. The method of claim 1,
Of nine dog clutches (Dog1-Dog9),
The first dog clutch Dog1 is installed between the first transmission shaft 121 and the second sun gear S2,
The second dog clutch Dog2 is installed between the first transmission shaft 121 and the first carrier Ca1.
The third dog clutch Dog3 is installed between the first transmission shaft 121 and the first sun gear S1.
The fourth dog clutch Dog4 is installed between the first fixed base 131 and the first sun gear S1.
The fifth dog clutch Dog5 is installed between the second fixed base 132 and the first carrier Ca1,
The sixth dog clutch Dog6 is installed between the second transmission shaft 122 and the fourth sun gear S4.
The seventh dog clutch Dog7 is installed between the second transmission shaft 122 and the second carrier Ca2.
The eighth dog clutch Dog8 is installed between the third fixed base 133 and the third sun gear S3.
The ninth dog clutch Dog9 is installed between the fourth fixed base 134 and the second carrier Ca2. The method of claim 1,
Of nine dog clutches (Dog1-Dog9),
The first dog clutch Dog1 is installed between the first transmission shaft 121 and the second sun gear S2,
The second dog clutch Dog2 is installed between the first transmission shaft 121 and the first carrier Ca1.
The third dog clutch Dog3 is installed between the first fixed base 131 and the first sun gear S1.
The fourth dog clutch Dog4 is installed between the second fixed base 132 and the first carrier Ca1,
The fifth dog clutch Dog5 is installed between the second transmission shaft 122 and the fourth sun gear S4.
The sixth dog clutch Dog6 is installed between the second transmission shaft 122 and the second carrier Ca2.
The seventh dog clutch Dog7 is installed between the third fixed base 133 and the third sun gear S3.
The eighth dog clutch Dog8 is installed between the fourth fixed base 134 and the second carrier Ca2.
The ninth dog clutch Dog9 is provided between the second transmission shaft 122 and the third sun gear S3. The multi-stage automatic transmission apparatus of the vehicle using the dog clutch.

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