Patent ID: 8220352
Filing Date: 2012-07-17
Classification: F16H,Y10T

Abstract:
1. A transmission comprising: a transmission housing; a dual clutch assembly having a clutch housing connectable to a flywheel of an engine, wherein the clutch housing is rotationally supported within the transmission housing; a first, second, third, fourth, fifth, and sixth gear sets, 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, the fourth gear set includes a first gear in mesh with a second gear, the fifth gear set includes a first gear in mesh with a second gear, and the sixth gear set includes a first gear in mesh with a second gear and a third gear in mesh with the second gear; a first transmission input member rotatably supported in the transmission housing and wherein each of the first gear of the third, fourth, fifth, and sixth 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 gear 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 each of the second gear of the second and third gear sets are selectively connectable for common rotation with the first countershaft and the third gear of the sixth gear set is 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 each of the second gear of the first and fourth gear sets are selectively connectable for common rotation with the second countershaft and the second gear of the sixth gear set is supported on and rotatable about the second countershaft; five synchronizer assemblies for selectively coupling at least one of the gears of the first, second, third, and fourth gear sets with at least one of the first countershaft and the second countershaft, wherein the selective engagement of the 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 five synchronizer assemblies establishes at least one of five forward speed ratios.