Arrangement of friction couplings and gear trains in a vehicle transmission

摘要

A motor vehicle transmission system including frictional coupling devices (C1-C3) disposed in series connection with respective gear trains (24, 34, 26, 36, 28, 38) between input and output shafts (20, 30), a one-way clutch (OWC1, OWC2) disposed in series connection with each of at least one of the gear trains except the smallest gear ratio gear train (28, 38), for transmitting power from the input shaft to the output shaft, and a shift controller (96, 98) operable during forward running of the vehicle to operate the frictional coupling devices for simultaneous slipping or partial engagement of selected frictional coupling devices, particularly, upon and immediately after starting of the vehicle.