KR100792427B1 - 8-shift automatic transmission - Google Patents

8-shift automatic transmission Download PDF

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Publication number
KR100792427B1
KR100792427B1 KR1020060093871A KR20060093871A KR100792427B1 KR 100792427 B1 KR100792427 B1 KR 100792427B1 KR 1020060093871 A KR1020060093871 A KR 1020060093871A KR 20060093871 A KR20060093871 A KR 20060093871A KR 100792427 B1 KR100792427 B1 KR 100792427B1
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South Korea
Prior art keywords
clutch
carrier
brake
gear
speed
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KR1020060093871A
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Korean (ko)
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김진석
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현대자동차주식회사
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
    • F16H3/44—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion using gears having orbital motion
    • F16H3/62—Gearings having three or more central gears
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
    • F16H3/44—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion using gears having orbital motion
    • F16H2003/445—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion using gears having orbital motion without permanent connection between the input and the set of orbital gears
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H2200/00—Transmissions for multiple ratios
    • F16H2200/003—Transmissions for multiple ratios characterised by the number of forward speeds
    • F16H2200/006—Transmissions for multiple ratios characterised by the number of forward speeds the gear ratios comprising eight forward speeds
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H2200/00—Transmissions for multiple ratios
    • F16H2200/20—Transmissions using gears with orbital motion
    • F16H2200/2002—Transmissions using gears with orbital motion characterised by the number of sets of orbital gears
    • F16H2200/2012—Transmissions using gears with orbital motion characterised by the number of sets of orbital gears with four sets of orbital gears

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structure Of Transmissions (AREA)

Abstract

An 8-shift automatic transmission is provided to improve fuel efficiency and acceleration performance of a vehicle by adding a clutch to a conventional 7-shift automatic transmission. An 8-shift automatic transmission includes four single pinion planetary gear sets(PG1,PG2,PG3,PG4), four clutches(C1,C2,C3,C4), and four brakes(B1,B2,B3,B4). A second ring gear is connected to an input shaft through the fourth clutch and operates as an input element. A third carrier is directly connected to an output shaft and operates as an output element. A first ring gear is shaft-coupled with a second carrier and is connected to a fourth ring gear. A third ring gear is connected to a fourth carrier. A first linear gear is shaft-coupled with a second linear gear. The third brake is applied on the first linear gear, and the first brake is applied on the first carrier and variably connected to a transmission housing. The second clutch is coupled with the first linear gear and variably connected to the first carrier. The first clutch is connected to the second ring gear through the fourth clutch and variably connected to the third ring gear. The second brake is applied on the third linear gear. The fourth brake is applied on the fourth carrier and variably connected to the transmission housing. The third clutch is applied on the fourth linear gear and variably connected to the third linear gear.

Description

8속 자동변속기{8-Shift Automatic Transmission}8-Shift Automatic Transmission

도 1은 종래 7속 자동변속기의 레이아웃,1 is a layout of a conventional seven-speed automatic transmission,

도 2는 도 1에 나타낸 자동변속기의 변속 과정에서의 마찰요소 작동 요소표,Figure 2 is a friction element operating element table in the shifting process of the automatic transmission shown in Figure 1,

도 3은 도 1에 나타낸 자동변속기의 변속과정을 가식적으로 도시한 레버 해석법의 속도선도,FIG. 3 is a speed diagram of a lever analysis method schematically showing a shift process of the automatic transmission shown in FIG. 1;

도 4는 본 발명에 따른 8속 자동변속기의 레이아웃,4 is a layout of an eight-speed automatic transmission according to the present invention;

도 5는 도 4에 나타낸 자동변속기의 변속 과정에서의 마찰요소 작동 요소표,5 is a friction element operating element table in the shifting process of the automatic transmission shown in FIG.

도 6은 도 4에 나타낸 자동변속기의 변속과정을 가식적으로 도시한 레버 해석법의 속도선도,FIG. 6 is a speed line diagram of a lever analysis method schematically showing a shift process of the automatic transmission shown in FIG. 4;

<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>

10: 입력축 20: 출력축10: input shaft 20: output shaft

30: 하우징 B1~B4: 브레이크30: housing B1-B4: brake

C1~C4: 클러치 PC1~PC4: 캐리어C1 to C4: Clutch PC1 to PC4: Carrier

PG1~PG4: 유성기어세트 R1~R4: 링기어PG1 to PG4: Planetary gear sets R1 to R4: Ring gears

S1~S4: 선기어S1 ~ S4: Sun Gear

본 발명은 8속 자동변속기에 관한 것으로서, 더욱 상세하게는 종래 7속 자동변속기에 클러치를 추가하여 8속 자동변속기를 구현함으로써 차량의 가속 성능과 연비 성능을 개선할 수 있는 8속 자동변속기에 관한 것이다.The present invention relates to an eight-speed automatic transmission, and more particularly, to an eight-speed automatic transmission that can improve the acceleration performance and fuel efficiency of the vehicle by implementing an eight-speed automatic transmission by adding a clutch to a conventional seven-speed automatic transmission. will be.

차량의 변속기는 엔진의 시동이 가능하도록 무부하 상태(중립)로 만들어주며, 또한 차량의 주행 상태에 알맞은 구동력을 엔진으로부터 제공할 수 있도록 해준다.The vehicle's transmission makes the engine unloaded (neutral) to allow the engine to start, and also provides the engine with driving power suitable for the vehicle's driving conditions.

또한, 한쪽 방향으로만 회전하는 엔진의 회전력을 전환하여 차량을 후진시킬 수 있는 기능이 있다. In addition, there is a function that can reverse the vehicle by switching the rotational force of the engine rotating in only one direction.

이러한 변속기 중에서 자동변속기에서는 차량의 유연한 발진, 가속 및 등반시 토크 증대 효과와 변속 또는 급격한 저항 변화시 충격을 흡수하는 특성을 지닌 토크 컨버터를 사용한다.Among these transmissions, automatic transmissions use torque converters that have the ability to increase torque when the vehicle starts, accelerates, and climbs, and absorbs shock when shifting or rapidly changing resistance.

그러나 차량의 주행 상태에 알맞은 구동력을 적절히 제공하기 위해서는 기존의 4단 자동변속기는 한계가 있다.However, the existing four-speed automatic transmission is limited in order to provide adequate driving force for the driving condition of the vehicle.

이에 의해 현재 통상적으로 사용되는 자동변속기는 4속 및 5속 변속기가 주류를 이루고 있으나, 최근에는 6속 자동변속기가 개발되어 일부 차량에 적용되는 한편으로 7속 자동변속기가 활발하게 개발되고 있다.As a result, four-speed and five-speed transmissions are mainly used in automatic transmissions currently used, but recently, six-speed automatic transmissions have been developed and applied to some vehicles, and seven-speed automatic transmissions have been actively developed.

일례로 도 1은 종래 7속 자동변속기의 레이아웃이다.For example, Figure 1 is a layout of a conventional seven-speed automatic transmission.

도시된 바와 같이, 4개의 싱글 피니언 유성기어세트(PG1)(PG2)(PG3)(PG4)와, 3개의 클러치(C1)(C2)(C3) 및 4개의 브레이크(B1)(B2)(B3)(B4)를 포함하여 구성된 다.As shown, four single pinion planetary gear sets PG1, PG2, PG3, PG4, three clutches C1, C2, C3 and four brakes B1, B2 and B3. (B4).

그리고 유성기어세트(PG1)(PG2)(PG3)(PG4)는 각각 선기어(S1)(S2)(S3)(S4)와 캐리어(PC1)(PC2)(PC3)(PC4) 및 링기어(R1)(R2)(R3)(R4)로 구성된다.The planetary gear sets PG1, PG2, PG3, and PG4 are sun gears S1, S2, S3, S4, and carrier PC1, PC2, PC3, PC4 and ring gear R1, respectively. ) R2, R3, and R4.

제2링기어(R1)는 입력축(10)과 직접 연결되어 항상 입력요소로 작동하고, 제3캐리어(PC3)는 출력축(20)과 직접 연결되어 항상 출력요소로 작동한다.The second ring gear R1 is directly connected to the input shaft 10 to always operate as an input element, and the third carrier PC3 is directly connected to the output shaft 20 to always operate as an output element.

제1링기어(R1)는 제2캐리어(PC2)에 축으로 연결되어 제4링기어(R4)에 연결된다.The first ring gear R1 is axially connected to the second carrier PC2 and is connected to the fourth ring gear R4.

제3링기어(R3)는 제4캐리어(PC4)와, 제1선기어(S1)는 제2선기어(S2)와 축으로 연결된다.The third ring gear R3 is connected to the fourth carrier PC4, and the first sun gear S1 is connected to the second sun gear S2 in an axis.

제1선기어(S1)에 제3브레이크(B3)가 개재되어 변속기 하우징(30)과 가변적으로 연결되고, 제1캐리어(PC1)에 제1브레이크(B1)가 개재되어 변속기 하우징(30)과 가변적으로 연결된다.A third brake B3 is interposed on the first sun gear S1 to be variably connected to the transmission housing 30, and a first brake B1 is interposed on the first carrier PC1 to be variable with the transmission housing 30. Is connected.

제1선기어(S1)에 제2클러치(C2)가 연결되어 제1캐리어(PC1)와 가변적으로 연결되고, 제2링기어(R2)에 제1클러치(C1)가 연결되어 제3링기어(R3)와 가변적으로 연결된다.The second clutch C2 is connected to the first sun gear S1 to be variably connected to the first carrier PC1, and the first clutch C1 is connected to the second ring gear R2 to connect the third ring gear ( Variably connected to R3).

제3선기어(S3)에 제2브레이크(B2)가 개재되어 변속기 하우징(30)과 가변적으로 연결되고, 제4캐리어(PC4)는 제4브레이크(B4)가 개재되어 변속기 하우징(30)과 가변적으로 연결되며, 제4선기어(S3)에 제3클러치(C3)가 개재되어 제3선기어(S3)와 가변적으로 연결된다.A second brake B2 is interposed in the third sun gear S3 to be variably connected to the transmission housing 30, and the fourth carrier PC4 is interposed to the transmission housing 30 by a fourth brake B4 interposed therebetween. The third clutch C3 is interposed between the fourth sun gear S3 and the third sun gear S3.

도 2는 도 1에 나타낸 자동변속기의 변속 과정에서의 마찰요소 작동 요소표 이고, 도 3은 도 1에 나타낸 자동변속기의 변속과정을 가식적으로 도시한 레버 해석법의 속도선도이다.FIG. 2 is a friction element operating element table in the shifting process of the automatic transmission shown in FIG. 1, and FIG. 3 is a speed diagram of a lever analysis method that schematically illustrates the shifting process of the automatic transmission shown in FIG. 1.

도 3에 도시된 바와 같이, 상기와 같이 이루어지는 자동변속기의 변속 과정을 레버 해석법에 의하여 가식적으로 살펴보면, 제1선기어(S1)와 제2선기어(S2)가, 제1링기어(R1)와 제2캐리어(PC2)가, 제3링기어(R3)와 제4캐리어(PC4)가 고정적으로 연결되고, 제3선기어(S3)와 제4선기어(S4)가 제3클러치(C3)를 통해 연결되는바, 제1노드(N1)는 제1선기어(S1) 및 제2선기어, 제2노드(N2)는 제1캐리어(PC1), 제3노드(N3)는 제1링기어(R1) 및 제2캐리어(PC2, 제4노드(N4)는 제2링기어(R2), 제5노드(N5)는 제4링기어(R4), 제6노드(N6)는 제3링기어(R3) 및 제4캐리어(PC4), 제7노드(N7)는 제3캐리어(PC3), 제8노드(N8)는 제3선기어(S3) 및 제4선기어(S8)로 설정된다.As shown in FIG. 3, when the transmission process of the automatic transmission made as described above is presumed by the lever analysis method, the first sun gear S1 and the second sun gear S2 are formed of the first ring gear R1 and the first ring gear. The second carrier PC2 is fixedly connected to the third ring gear R3 and the fourth carrier PC4, and the third sun gear S3 and the fourth sun gear S4 are connected through the third clutch C3. The first node (N1) is the first sun gear (S1) and the second sun gear, the second node (N2) is the first carrier (PC1), the third node (N3) is the first ring gear (R1) and The second carrier PC2 and the fourth node N4 are the second ring gear R2, the fifth node N5 is the fourth ring gear R4, and the sixth node N6 is the third ring gear R3. And the fourth carrier PC4, the seventh node N7, the third carrier PC3, and the eighth node N8 are set as the third sun gear S3 and the fourth sun gear S8.

상기와 같이 레버 해석법에 의한 각 노드가 설정된 본 발명의 자동변속기는 변속단에서 도 2와 같이 작동하면서 변속이 이루어진다.As described above, the automatic transmission of the present invention in which each node is set by the lever analysis method is shifted while operating as shown in FIG.

보다 구체적으로 살펴보면, 전진 제1속에서는 제3클러치(C3)와 제1브레이크(B1) 및 제2브레이크(B2)가 작동하게 된다.More specifically, in the first forward speed, the third clutch C3, the first brake B1, and the second brake B2 operate.

제2속에서는 상기 제1속의 상태에서 제1브레이크(B1)의 작동이 해제되고 제3브레이크(B3)가 작동 제어된다.In the second speed, the operation of the first brake B1 is released in the state of the first speed and the third brake B3 is controlled to operate.

제3속에서는 상기 제2속의 상태에서 제3브레이크(B3)의 작동이 해제되고, 제2클러치(C2)가 작동 제어된다.In the third speed, the operation of the third brake B3 is released in the state of the second speed, and the second clutch C2 is controlled to operate.

제4속에서는 상기 제3속의 상태에서 제3클러치(C3)의 작동이 해제되고 제1클 러치(C1)가 작동 제어된다.In the fourth speed, the operation of the third clutch C3 is released in the state of the third speed, and the first clutch C1 is controlled to operate.

제5속에서는 상기 제4속의 상태에서 제2브레이크(B2)의 작동이 해제되고 제3클러치(C3)가 작동 제어된다.In the fifth speed, the operation of the second brake B2 is released in the state of the fourth speed, and the third clutch C3 is controlled to operate.

제6속에서는 상기 제5속의 상태에서 제2클러치(C2)의 작동이 해제되고 제3브레이크(B3)가 작동 제어된다.In the sixth speed, the operation of the second clutch C2 is released in the state of the fifth speed, and the third brake B3 is controlled to operate.

제7속에서는 상기 제6속의 상태에서 제3브레이크(B3)의 작동이 해제되고 제1브레이크(B1)가 작동 제어된다.In the seventh speed, the operation of the third brake B3 is released in the state of the sixth speed, and the first brake B1 is operated and controlled.

그리고 후진 1속에서는 제3클러치(C3)와 제1브레이크(B1) 및 제4브레이크(B4)가 작동제어된다.In the reverse first speed, the third clutch C3, the first brake B1, and the fourth brake B4 are operated and controlled.

가용할 수 있는 속도단을 많이 제공할수록 차량의 가속 성능과 연비 성능을 개선할 수 있는 중요한 요소가 되므로 최근에는 자동변속기의 속도단을 증가시키고 있는 추세이다.As more speed stages are available, it becomes an important factor to improve the acceleration performance and fuel economy performance of the vehicle, which is increasing the speed stage of the automatic transmission in recent years.

본 발명은 상기한 추세에 발맞추어 종래 7속 자동변속기에 마찰요소인 클러치를 추가하여 8속 자동변속기를 구현하기 위하여 안출된 것으로서, 차량의 가속 성능과 연비 성능을 개선할 수 있는 8속 자동변속기를 제공하는데 그 목적이 있는 것이다.The present invention was devised to implement an eight-speed automatic transmission by adding a clutch that is a friction element to the conventional seven-speed automatic transmission in accordance with the above trend, an eight-speed automatic transmission that can improve the acceleration performance and fuel economy performance of the vehicle. The purpose is to provide.

상술한 목적을 달성하기 위한 본 발명의 실시예에 따른 8속 자동변속기는 을 특징으로 한다.An eight-speed automatic transmission according to an embodiment of the present invention for achieving the above object is characterized by.

이하 본 발명의 실시예에 대하여 첨부된 도면을 참고로 그 구성 및 작용을 설명하기로 한다.Hereinafter, the configuration and operation of the present invention will be described with reference to the accompanying drawings.

도 4는 본 발명에 따른 8속 자동변속기의 레이아웃으로, 종래와 동일한 구성요소에 대해서는 같은 도번을 부여한다.4 is a layout of an eight-speed automatic transmission according to the present invention, and the same reference numerals are given to the same components as in the prior art.

도시된 바와 같이, 4개의 싱글 피니언 유성기어세트(PG1)(PG2)(PG3)(PG4)와, 4개의 클러치(C1)(C2)(C3)(C4) 및 4개의 브레이크(B1)(B2)(B3)(B4)를 포함하여 구성된다.As shown, four single pinion planetary gear sets PG1, PG2, PG3, PG4, four clutches C1, C2, C3, C4, and four brakes B1, B2. (B3) and (B4).

그리고 유성기어세트(PG1)(PG2)(PG3)(PG4)는 각각 선기어(S1)(S2)(S3)(S4)와 캐리어(PC1)(PC2)(PC3)(PC4) 및 링기어(R1)(R2)(R3)(R4)로 구성된다.The planetary gear sets PG1, PG2, PG3, and PG4 are sun gears S1, S2, S3, S4, and carrier PC1, PC2, PC3, PC4 and ring gear R1, respectively. ) R2, R3, and R4.

제2링기어(R1)는 입력축(10)과 제4클러치(C4)를 통해 연결되어 입력요소로 작동하고, 제3캐리어(PC3)는 출력축(20)과 직접 연결되어 항상 출력요소로 작동한다.The second ring gear R1 is connected to the input shaft 10 and the fourth clutch C4 to operate as an input element, and the third carrier PC3 is directly connected to the output shaft 20 to always operate as an output element. .

제1링기어(R1)는 제2캐리어(PC2)에 축으로 연결되어 제4링기어(R4)에 연결된다.The first ring gear R1 is axially connected to the second carrier PC2 and is connected to the fourth ring gear R4.

제3링기어(R3)는 제4캐리어(PC4)와, 제1선기어(S1)는 제2선기어(S2)와 축으로 연결된다.The third ring gear R3 is connected to the fourth carrier PC4, and the first sun gear S1 is connected to the second sun gear S2 in an axis.

제1선기어(S1)에 제3브레이크(B3)가 개재되어 변속기 하우징(30)과 가변적으로 연결되고, 제1캐리어(PC1)에 제1브레이크(B1)가 개재되어 변속기 하우징(30)과 가변적으로 연결된다.A third brake B3 is interposed between the first sun gear S1 to be variably connected to the transmission housing 30, and a first brake B1 is interposed to the first carrier PC1 to be variable with the transmission housing 30. Is connected.

제1선기어(S1)에 제2클러치(C2)가 연결되어 제1캐리어(PC1)와 가변적으로 연 결되고, 제2링기어(R2)에 제4클러치(C4)를 통해 제1클러치(C1)가 연결되어 제3링기어(R3)와 가변적으로 연결된다.The second clutch C2 is connected to the first sun gear S1 and variably connected to the first carrier PC1, and the first clutch C1 is connected to the second ring gear R2 through the fourth clutch C4. ) Is variably connected to the third ring gear (R3).

제3선기어(S3)에 제2브레이크(B2)가 개재되어 변속기 하우징(30)과 가변적으로 연결되고, 제4캐리어(PC4)는 제4브레이크(B4)가 개재되어 변속기 하우징(30)과 가변적으로 연결되며, 제4선기어(S3)에 제3클러치(C3)가 개재되어 제3선기어(S3)와 가변적으로 연결된다.A second brake B2 is interposed in the third sun gear S3 to be variably connected to the transmission housing 30, and the fourth carrier PC4 is interposed to the transmission housing 30 by a fourth brake B4 interposed therebetween. The third clutch C3 is interposed between the fourth sun gear S3 and the third sun gear S3.

도 5는 도 4에 나타낸 자동변속기의 변속 과정에서의 마찰요소 작동 요소표,5 is a friction element operating element table in the shifting process of the automatic transmission shown in FIG.

도 6은 도 4에 나타낸 자동변속기의 변속과정을 가식적으로 도시한 레버 해석법의 속도선도이다.FIG. 6 is a speed diagram of a lever analysis method schematically showing a shift process of the automatic transmission shown in FIG. 4.

도 6에 도시된 바와 같이, 제1선기어(S1)와 제2선기어(S2)가, 제1링기어(R1)와 제2캐리어(PC2)가, 제3링기어(R3)와 제4캐리어(PC4)가 고정적으로 연결되고, 제3선기어(S3)와 제4선기어(S4)가 제3클러치(C3)를 통해 연결되는바, 제1노드(N1)는 제1선기어(S1) 및 제2선기어, 제2노드(N2)는 제1캐리어(PC1), 제3노드(N3)는 제1링기어(R1) 및 제2캐리어(PC2, 제4노드(N4)는 제2링기어(R2), 제5노드(N5)는 제4링기어(R4), 제6노드(N6)는 제3링기어(R3) 및 제4캐리어(PC4), 제7노드(N7)는 제3캐리어(PC3), 제8노드(N8)는 제3선기어(S3) 및 제4선기어(S8)로 설정된다.As shown in FIG. 6, the first sun gear S1 and the second sun gear S2 include the first ring gear R1 and the second carrier PC2, and the third ring gear R3 and the fourth carrier. The PC4 is fixedly connected, and the third sun gear S3 and the fourth sun gear S4 are connected through the third clutch C3. The first node N1 is formed of the first sun gear S1 and the first sun gear S1. The two-wire gear, the second node N2 is the first carrier PC1, and the third node N3 is the first ring gear R1 and the second carrier PC2, the fourth node N4 is the second ring gear ( R2), the fifth node N5 is the fourth ring gear R4, the sixth node N6 is the third ring gear R3 and the fourth carrier PC4, and the seventh node N7 is the third carrier. PC3 and the eighth node N8 are set as the third sun gear S3 and the fourth sun gear S8.

상기와 같이 레버 해석법에 의한 각 노드가 설정된 본 발명의 자동변속기는 변속단에서 도 5와 같이 작동하면서 변속이 이루어진다.As described above, the automatic transmission of the present invention in which each node is set by the lever analysis method is shifted while operating as shown in FIG. 5 at the shift stage.

보다 구체적으로 살펴보면, 전진 제1속에서는 제3클러치(C3)와 제4클러치(C4)와 제1브레이크(B1) 및 제2브레이크(B2)가 작동하게 된다.More specifically, in the first forward speed, the third clutch C3, the fourth clutch C4, the first brake B1, and the second brake B2 operate.

제2속에서는 상기 제1속의 상태에서 제1브레이크(B1)의 작동이 해제되고 제3브레이크(B3)가 작동 제어된다.In the second speed, the operation of the first brake B1 is released in the state of the first speed and the third brake B3 is controlled to operate.

제3속에서는 상기 제2속의 상태에서 제3브레이크(B3)의 작동이 해제되고, 제2클러치(C2)가 작동 제어된다.In the third speed, the operation of the third brake B3 is released in the state of the second speed, and the second clutch C2 is controlled to operate.

제4속에서는 상기 제3속의 상태에서 제3클러치(C3)의 작동이 해제되고 제1클러치(C1)가 작동 제어된다.In the fourth speed, the operation of the third clutch C3 is released in the state of the third speed, and the first clutch C1 is operated and controlled.

제5속에서는 상기 제4속의 상태에서 제2브레이크(B2)의 작동이 해제되고 제3클러치(C3)가 작동 제어된다.In the fifth speed, the operation of the second brake B2 is released in the state of the fourth speed, and the third clutch C3 is controlled to operate.

제6속에서는 상기 제5속의 상태에서 제2클러치(C2)의 작동이 해제되고 제3브레이크(B3)가 작동 제어된다.In the sixth speed, the operation of the second clutch C2 is released in the state of the fifth speed, and the third brake B3 is controlled to operate.

제7속에서는 상기 제6속의 상태에서 제3브레이크(B3)의 작동이 해제되고 제1브레이크(B1)가 작동 제어된다.In the seventh speed, the operation of the third brake B3 is released in the state of the sixth speed, and the first brake B1 is operated and controlled.

제8속에서는 상기 제7속의 상태에서 제4클러치(C4)의 작동이 해제되고 제3브레이크(B3)가 작동제어된다.In the eighth speed, the operation of the fourth clutch C4 is released in the state of the seventh speed, and the third brake B3 is operated and controlled.

그리고 후진 1속에서는 제3클러치(C3)와 제4클러치(C4)와 제1브레이크(B1) 및 제4브레이크(B4)가 작동제어된다.In the reverse speed 1, the third clutch C3, the fourth clutch C4, the first brake B1, and the fourth brake B4 are operated and controlled.

이와 같이 종래 7속의 레이아웃에서 입력축(10)과 제2링기어(R2) 사이에 제4클러치(C4)를 배치하여 전진 8속을 구현할 수 있다.As such, the fourth clutch C4 may be disposed between the input shaft 10 and the second ring gear R2 in the conventional seventh speed layout to implement eight forward speeds.

이상에서 살펴본 바와 같이 본 발명에 의하면, 종래 7속 자동변속기에 마찰 요소인 클러치를 추가하여 8속 자동변속기를 구현함으로써, 차량의 가속 성능과 연비 성능을 개선할 수 있다.As described above, according to the present invention, by implementing a 8-speed automatic transmission by adding a clutch as a friction element to a conventional 7-speed automatic transmission, it is possible to improve the acceleration performance and fuel economy performance of the vehicle.

Claims (1)

4개의 싱글 피니언 유성기어세트(PG1)(PG2)(PG3)(PG4)와 4개의 클러치(C1)(C2)(C3)(C4) 및 4개의 브레이크(B1)(B2)(B3)(B4)를 포함하여 이루어지되;Four single pinion planetary gear sets (PG1) (PG2) (PG3) (PG4) and four clutches (C1) (C2) (C3) (C4) and four brakes (B1) (B2) (B3) (B4 Including); 제2링기어(R1)는 입력축(10)과 제4클러치(C4)를 통해 연결되어 입력요소로 작동하고, 제3캐리어(PC3)는 출력축(20)과 직접 연결되어 항상 출력요소로 작동하며,The second ring gear R1 is connected to the input shaft 10 and the fourth clutch C4 to operate as an input element, and the third carrier PC3 is directly connected to the output shaft 20 to always operate as an output element. , 제1링기어(R1)는 제2캐리어(PC2)에 축으로 연결되어 제4링기어(R4)에 연결되고,The first ring gear R1 is connected to the fourth ring gear R4 by being connected to the shaft of the second carrier PC2, 제3링기어(R3)는 제4캐리어(PC4)와, 제1선기어(S1)는 제2선기어(S2)와 축으로 연결되고,The third ring gear (R3) is connected to the fourth carrier (PC4), the first sun gear (S1) and the second sun gear (S2) in the shaft, 제1선기어(S1)에 제3브레이크(B3)가 개재되어, 제1캐리어(PC1)는 제1브레이크(B1)가 개재되어 변속기 하우징(30)과 가변적으로 연결되며,The third brake B3 is interposed on the first sun gear S1, and the first carrier PC1 is variably connected to the transmission housing 30 by interposing the first brake B1. 상기 제1선기어(S1)에 제2클러치(C2)가 연결되어 제1캐리어(PC1)와 가변적으로 연결되고, 제2링기어(R2)에 제4클러치(C4)를 통해 제1클러치(C1)가 연결되어 제3링기어(R3)와 가변적으로 연결되며,The second clutch C2 is connected to the first sun gear S1 and variably connected to the first carrier PC1, and the first clutch C1 is connected to the second ring gear R2 through the fourth clutch C4. ) Is connected and variably connected to the third ring gear (R3), 제3선기어(S3)에 제2브레이크(B2)가 개재되어, 제4캐리어(PC4)는 제4브레이크(B4)가 개재되어 변속기 하우징(30)과 가변적으로 연결되고, 제4선기어(S3)에 제3클러치(C3)가 개재되어 제3선기어(S3)와 가변적으로 연결되는 것을 특징으로 하는 8속 자동변속기.The second brake B2 is interposed on the third sun gear S3, and the fourth carrier PC4 is variably connected to the transmission housing 30 by interposing the fourth brake B4, and the fourth sun gear S3. An eight-speed automatic transmission, characterized in that the third clutch (C3) is interposed in the third sun gear (S3) variably connected.
KR1020060093871A 2006-09-27 2006-09-27 8-shift automatic transmission KR100792427B1 (en)

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KR101305640B1 (en) 2012-06-27 2013-09-09 현대 파워텍 주식회사 8-speed power train of automatic transmission
CN104389960A (en) * 2014-09-23 2015-03-04 中国北方车辆研究所 Automatic seven-gear planetary transmission for tracked vehicle

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KR20050045598A (en) * 2003-11-12 2005-05-17 현대자동차주식회사 7 - shift power train in an automatic transmission for vehicles
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