Patent ID: 6217479
Filing Date: 2001-04-17
Classification: F16H,Y10T

Abstract:
A converterless, multiple-ratio, automatic transmission for a vehicle driveline having an internal combustion engine, the transmission including a driven shaft in a torque flow path to vehicle traction vehicles;planetary gearing of the transmission defining multiple forward drive torque flow paths between the engine and the driven shaft;the engine having a crankshaft directly connected drivably to a torque input element of the gearing whereby the crankshaft and the torque input element are continuously coupled during torque delivery through the torque flow paths for rotation in unison;pressure-operated friction clutch means in the transmission for establishing and disestablishing the torque flow paths including a forward drive clutch that is engaged for forward drive operation; andautomatic clutch control means for disengaging and engaging the forward drive clutch to respectively disconnect and connect the engine from and to the gearing, thereby effecting control of the driveline during vehicle startup in forward drive.