Patent ID: 6477909
Filing Date: 2002-11-12
Classification: F16H,Y10T

Abstract:
A countershaft transmission in a powertrain having a throttle controlled engine, said transmission comprising:a selectively engageable friction clutch to connect and disconnect the engine and the said transmission; an input shaft selectively drivingly connected with said friction clutch; an output shaft coaxially aligned with said input shaft; a countershaft disposed parallel with both said input shaft and said output shaft; a head gear set drivingly connected between said input shaft and said countershaft for transmitting power therebetween; a plurality of ratio gear pairs selectively operatively connected between said countershaft and said output shaft for transmitting power therebetween; a damper mechanism including a friction element disposed axially between said input shaft and said output shaft, an actuator selectively operable to enforce frictional engagement between said input shaft and said output shaft to maintain a lash condition between said head gear set and an active pair of said ratio gears during a transient condition of power transfer between said input shaft and said output shaft by way of said countershaft.