Patent ID: 6244123
Filing Date: 2001-06-12
Classification: F16H,Y10T

Abstract:
A multiple-speed gearbox for motor vehicles, comprising:a first input shaft;a second hollow input shaft concentric with and surrounding the first input shaft;first and second mutually parallel countershafts substantially parallel to the input shafts, the first countershaft having an output drive pinion driveably connectable to an output shaft;first and second selectively switchable friction clutches, the first clutch connected to the first input shaft, the second clutch connected to the second input shaft;pairs of meshing gears, each pair having a first member supported on one of the first and second input shafts and a second member supported on one of the first and second countershafts, each pair having a gear fixed to the shaft on which it is supported and a gear journalled on the shaft on which it is supported;synchronizers for driveably connecting the journalled gears to the shafts on which they are supported located, a first synchronizer located between two journalled gears supported on the first input shaft, a second synchronizer located between two journalled gears supported on the second input shaft, a third synchronizer located between two journalled gears supported on the first countershaft, a fourth synchronizer located between two journalled gears supported on the first countershaft; andthe first input shaft connectable to the second input shaft by a synchronizer clutch.