초록 ▼

A multiple-ratio transmission with planetary gearing and a friction clutch and brake for controlling relative motion of the gearing to establish multiple driving ratios between an internal combustion engine and vehicle traction wheels, the clutch and brake include a forward drive clutch and a revers

A multiple-ratio transmission with planetary gearing and a friction clutch and brake for controlling relative motion of the gearing to establish multiple driving ratios between an internal combustion engine and vehicle traction wheels, the clutch and brake include a forward drive clutch and a reverse drive clutch for establishing torque flow paths through the gearing. The forward drive clutch establishes a torque flow path through the gearing from the engine through a torque output element of the transmission during vehicle startup in forward drive range, and the reverse clutch establishes a corresponding torque flow path during startup in reverse. A mechanical connection between the torque input shaft of the gearing and the crankshaft is characterized by minimal rotating mass, thereby reducing the inertia of rotating mass of the elements of the transmission.

대표청구항 ▼

[ What is claimed is:] [1.]1. 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 for

[ What is claimed is:] [1.]1. 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.