Power transmission system for six-gear automatic gearbox

Abstract

The invention provides a power transmission system for a six-gear automatic gearbox which has the advantages of decreased power loss, compact structure and convenient assembly of the automatic gearbox. The power transmission system for a six-gear automatic gearbox of the invention optimizes the design of a clutch, an arrester and a central supporting structure and reasonably distributes planetarygear sets and gear-changing elements, wherein a third planetary gear set, a first planetary gear set and a second planetary gear set are orderly arranged. Various gear-changing elements such as a first clutch, a second clutch, a first arrester, a second arrester, a third arrester, a central support, a unidirectional clutch, etc., are uniformly arranged on the periphery of the planetary gear sets to ensure that the structure of the gearbox is more compact. Furthermore, the invention can perform six-gear shift by only using two clutches, so the friction loss is decreased, that is, the power lossis smaller.

Description

technical field [0001] The invention belongs to the technical field of automobile manufacturing, in particular to a power transmission system of a six-speed automatic transmission of an automobile. Background technique [0002] The speed change mechanism of the automatic transmission is composed of multiple planetary gear sets, friction elements that transmit and convert speed and torque, such as clutches, brakes, one-way clutches and their servo systems. The converted torque is transmitted to the output shaft to drive the car. The more the number of gears in the transmission, the more ideal the speed ratio of the transmission can be designed, and the vehicle can have better fuel economy and driving performance, but the more gears, the larger the volume of the gearbox, which means This makes the space in the front cabin even tighter. In addition, with the increase of friction elements, some six-speed automatic transmissions have as many as three clutches, so the efficiency...

AI Technical Summary

Problems solved by technology

The more the number of gears in the transmission, the more ideal the speed ratio of the transmission can be designed, and the vehicle can have better fuel economy and driving performance, but the more gears, the larger the volume of the gearbox, which means Makes the front cabin space tighter

In addition, with the increase of friction elements, some six-speed automatic transmissions have as many as three clutches, so the efficiency reduction caused by friction loss is inevitable.

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