| 摘要 |
A double-clutch transmission (DCT) includes, but is not limited to two input shafts that are connected to two clutches separately. Three layshafts of the DCT are spaced apart from the input shafts in parallel. One or more of the layshafts includes, but are not limited to a pinion. Gearwheels of eight gearwheel groups are arranged on the shafts for providing seven sequentially increasing forward gears and one reverse gear. Each one of the gearwheel groups comprises a fixed gearwheel on one of the input shaft, meshing with an idler gearwheel on one of the layshafts. A third fixed gearwheel meshes with a third gear idler gearwheel and a fifth gear idler gearwheel. Especially, a fourth fixed gearwheel meshes with a fourth gear idler gearwheel and a sixth gear idler gearwheel.
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