DOUBLE-CLUTCH TRANSMISSION FOR VEHICLES

摘要

Double-clutch transmission (DCT) (1) comprises an inner input shaft (20) inside an outer input shaft (22). A first clutch disc (8) and a second clutch disc (10) of the DCT (1) are connected to the two input shafts (20, 22) respectively. Pinions (41, 51, 55) are fixed onto three parallel layshafts (40, 50, 38, 90) of the DCT (1) respectively. The gearwheels on the layshafts (40, 50, 38, 90) comprise seven gearwheel groups. Each of the gearwheel group comprises a fixed gearwheel that meshes with an idler gearwheel. A fourth fixed gearwheel (31) on the outer input shaft (22) meshes with the fourth gear idler gearwheel (63) and the sixth gear idler gearwheel (65). In particular, a fifth fixed gearwheel (26) on the inner input shaft (20) meshes with a fifth gear idler gearwheel (64) and the seventh gear idler gearwheel (66). The gearwheels further comprises a reverse gearwheel group that comprises a fixed gearwheel on one of the input shafts (20, 22), meshing with a reverse gear idler gearwheel (37) on one of the layshafts (40, 50, 38, 90).