Patent ID: 7140267
Filing Date: 2006-11-28
Classification: F16H,Y10T

Abstract:
1. A dynamically-shiftable dual clutch transmission comprising: an input shaft; an output shaft; a first countershaft; a second countershaft, wherein said first and second countershafts are axially displaced from said input shaft, from said output shaft and from one another; only thirteen external gears; two input clutches and six torque-transmitting mechanisms, wherein said input clutches and torque-transmitting mechanisms are selectively engageable for interconnecting at least some of said external gears with said input shaft, said output shaft, said first countershaft, said second countershaft or with one another to transfer torque between said input shaft and said output shaft; wherein by said selective engagement said transmission establishes eight forward speed ratios and one reverse speed ratio; and wherein shifting between each of said forward speed ratios is dynamic.