Structure Design And Study On Dry Dual Clutch Automatic Transmission

Dual Clutch Transmission (DCT) is a new type of automatic transmission. It inherits the advantages of Automatic Transmission (AT) and Automated Mechanical Transmission (AMT). It has the ability of power shifing that can reduce shift time and improve shift quality. And the comfort and maneuverability of vehicle will be greatly improved. The DCT has become a new research direction in vehicle automatic transmission field, and it shall have a favorable foreground of broad market. Therefore, the further study of dual clutch automatic transmission will be an important direction for achieveing of independent innovation.In this thesis, the study of dry type Dual Clutch Transmission is based on the Structural characteristics and working principle of DCT. The major study for dry dual clutch automatic transmission is the following content.â‘ Dual clutch automatic transmission structure and working principle are systematicly and comprehensively analyzed and structural characteristics are also summarized; Features of transmission schemes for DCT using double side clutch and dual clutch and so on are analyzed; Dry and wet clutch characteristics and range of application are emphatically analyzed; comparative analysis of transmission scheme of actuator of the DCT are given.â‘¡Structural features of dry dual clutch DCT with dual intermediate shaft are summarized; design methods of transmission ratio, gears-shafting and parameter selective principles for DCT with dual intermediate shaft are analyzed and the basic design methods are determined; Layout form of dry clutch and structural characteristics are made an analysis and its basic design method are determined.â‘¢According to the parameters of the prototype vehicle and determined design methods of dry DCT with dual intermediate shaft, the design and calculations of gears-shafting are performed to establish the basic design structure of DCT; The design, calculations and parameter selective principles of friction disk and diaphragm spring are performed by established design methods of dry clutch; Three-dimensional modeling of gears-shafting for the DCT with dual intermediate is finally established.â‘£Simulation modeling of gears-shafting is established, and the dynamic and kinematic analysis of simulation modeling are made; Comparative analysis of fitting degree for the simulation results and theoretical calculations are carried out to verify d verify correctness of the design methods and the establishment of the gears-shafting. Reference and basis can be provided for gears-shafting structural optimization design and dynamic analysis.