The Development Of DCT Shift Mechanism Based On The Barrel Cam

Abstract

A dual clutch transmission (DCT) can shift more quickly than cars equipped with manual transmissions or single-clutch automated-manual transmissions (AMTs). However, DCTs have complicated structures because two clutches are arranged concentrically. In this study, we develop a novel shift mechanism based on a barrel cam to enhance the shifting efficiency of DCTs. We have analyzed the multi-body dynamics of the shift mechanism including barrel cam, per-select synchronizer and fork for various cam-profiles such as cycloid, polynomial and modified sine curves. Simulation results show that the angular velocities of engagement and disengagement of the shift mechanism and contact force. In addition, the proposed shifting mechanism is shown to reduce the shift shock and response time during the shift process.