Patent ID: 6390946
Filing Date: 2002-05-21
Classification: F16H

Abstract:
An automatic transmission for a vehicle, comprising:a toroidal type continuously variable transmission having a forward-reverse switching mechanism, an impelling mechanism and a toroidal transmission unit which are sequentially provided from the driving source side of the vehicle; and a speed change control device for controlling the operation of said transmission, wherein said impelling mechanism comprises a loading cam and a cam roller holder, wherein a rotational speed signaling section is provided on one of rotating members, which are connected to each other, in the area from an output member of said forward-reverse switching mechanism to said cam roller holder of said impelling mechanism, said one of rotating members rotating regardless of the presence or absence of the rotation transmission in said forward-reverse switching mechanism, and wherein an input rotational speed detecting part, installed on a side of a case of the transmission, is positioned in the vicinity of an outer periphery of said rotational speed signaling section, said input rotational speed detecting part detects a rotational speed of said one of rotating members provided with said rotational speed signaling section and inputs the detected rotational speed to said speed change control device.