AN INSIGHT TO THE CONSTRUCTION AND WORKING OF DUAL CLUTCH TRANSMISSION

Abstract

A dual clutch transmission (DCT) is a type of automatic transmission featured with a dual-clutch module and two input shafts. A DCT is able to provide a high-quality gear shifting with a gear pre-selection procedure and overlapping of clutch engagement. The gear pre-selection procedure means that the synchronization of the oncoming gear has been completed before the actual gear shifting procedure starts. And due to the overlapping mechanism of the two clutches, torque is transferred from the engine to the driving wheels without interruption during gear shifting. Therefore, it provides a rapid gear shifting without sacrificing fuel efficiency and riding comfort. In addition, with a precisely computed and accurately controlled slippage of the dual-clutch module, the DCT is able to provide a fast and smooth gear shifting. The performance of a DCT during gear shifting relies on a well-designed clutch engagement controller which should be able to achieve fast clutch-to-clutch shifting and smooth gear shifting without noticeable torque disturbance.