Patent ID: 8375817
Filing Date: 2013-02-19
Classification: F16H,Y10T

Abstract:
1. A transmission comprising: a transmission housing; a dual clutch assembly having a clutch housing connectable to an engine, wherein the clutch housing is rotationally supported within the transmission housing; a first, second, third, fourth and fifth gear set, wherein the first gear set includes a first gear in mesh with a second gear, the second gear set includes a first gear in mesh with a second gear, the third gear set includes a first gear in mesh with a second gear and a reverse gear in mesh with the second gear, the fourth gear set includes a first gear in mesh with a second gear and the fifth gear set includes a first gear in mesh with a second gear; a first transmission input member rotatably supported in the transmission housing and wherein each of the first gears of the third, fourth and fifth gear sets are rotatably fixed for common rotation with the first transmission input member; a second transmission input member rotatably supported in the transmission housing, wherein each of the first gears of the first and second gear sets are rotatably fixed for common rotation with the second transmission input member and wherein the second transmission input member is concentric with the first transmission input member and at least partially surrounds the first transmission input member; a first countershaft rotatably supported within the transmission housing and spaced apart from and parallel with the first and second transmission input members, wherein the second gears of the first, the second, the third, the fourth and the fifth gear sets are each selectively connectable for common rotation with the first countershaft; a second countershaft rotatably supported within the transmission housing and spaced apart from and parallel with the first and second transmission input members, wherein the reverse gear of the third gear set is selectively connectable for common rotation with the second countershaft; four synchronizer assemblies for selectively coupling at least one of the second gears of the first, second, third, fourth and fifth gear sets with the first countershaft and the reverse gear of the third gear set with the second countershaft; and wherein the combined selective engagement of dual clutch assembly interconnects the dual clutch housing with at least one of the first and the second transmission input members and the selective engagement of at least one of the four synchronizer assemblies establishes at least one of five forward speed ratios and at least one reverse speed ratio.