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An automatic transmission and its planetary gear train

A technology for planetary gear trains and automatic transmissions, applied in gear transmissions, belts/chains/gears, transmissions, etc., can solve problems such as fuel economy, responsiveness, and stability limitations, and achieve compact overall design, Effect of Short Transmission Length

Active Publication Date: 2018-01-05
西安双特智能传动有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, from the perspective of technological development, there are limitations in terms of fuel economy, responsiveness, and stability, and continuous improvement and design updates are required.

Method used

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  • An automatic transmission and its planetary gear train
  • An automatic transmission and its planetary gear train
  • An automatic transmission and its planetary gear train

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Embodiment Construction

[0074] At the heart of the present invention is the provision of a planetary gear train comprising four planetary rows and six torque transmitting device mechanisms or control units capable of providing at least eight forward gears and at least two reverse gears.

[0075] Another core of the present invention is to provide an automatic transmission provided with the planetary gear train.

[0076] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0077] The explanations in the description of the present invention are limited to implementing exemplary solutions, and descriptions of unnecessary parts are omitted. In the description of the present invention, the same components are represented by the same symbols in different drawings. In specific implementation descriptions, numbers and lett...

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Abstract

The invention discloses a planetary gear train for an automatic transmission, which can obtain at least eight available forward gears and at least two available reverse gears, including the first planetary row, the second planetary row, the third planetary row and the first planetary row. Four planetary rows, each planetary row has a sun gear, a planet carrier and a ring gear; the assembly of the planetary row and the connecting member can form eight rotating bodies in total; the shift assembly includes three clutches and three brakes, the clutch It is arranged between a selected one of the rotating bodies, and the brake is arranged between a selected one of the rotating bodies and a fixed piece. The planetary gear train can have more gears and a more optimized speed ratio, which can significantly improve the power transmission performance and fuel economy of the vehicle, and is shorter in length and more compact in overall design, which can well meet the requirements of the vehicle on the durability of the transmission. Performance, power transmission efficiency, size, cost and other requirements. The invention also discloses an automatic transmission provided with the planetary gear train.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a planetary gear train suitable for automatic transmissions of vehicles. The invention also relates to an automatic transmission provided with said planetary gear train. Background technique [0002] The planetary gear train is the core mechanism for automatic transmission AT (Automatic Transmission). It is mainly composed of planetary gears, clutches and brakes. By controlling the clutches and brakes, the components of the planetary gears can be interconnected in different combinations to achieve Conversion of various transmission ratios. [0003] When the transmission has more optional gears, it can be designed more optimally. Through the transmission with more gears and more optimized speed ratio, the engine can meet the needs of different vehicle speeds while working in the high-efficiency zone. , so that the vehicle can have more economical fuel consumption and better ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H3/62F16H57/023
Inventor 王军赵会强王亚锋杰森马修柯瓦泽王凯峰周能文毕乾坤侯连军
Owner 西安双特智能传动有限公司
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