Search International and National Patent Collections

1. (WO1999008024) TOROIDAL TYPE AUTOMATIC TRANSMISSION FOR MOTOR VEHICLES

Pub. No.:    WO/1999/008024    International Application No.:    PCT/JP1998/003475
Publication Date: Fri Feb 19 00:59:59 CET 1999 International Filing Date: Wed Aug 05 01:59:59 CEST 1998
IPC: F16H 61/662
F16H 61/664
Applicants: NISSAN MOTOR CO., LTD.
HIBI, Toshifumi
MORI, Haruhito
NAKANO, Masaki
Inventors: HIBI, Toshifumi
MORI, Haruhito
NAKANO, Masaki
Title: TOROIDAL TYPE AUTOMATIC TRANSMISSION FOR MOTOR VEHICLES
Abstract:
Even in the case where a driver switches a select lever from D range to N range and returns it back to D range during the running of a vehicle, a speed change control device prevents the operation of sudden speed change caused by a difference between a transmission input rotational speed and the actual input rotating speed of a toroidal transmission unit while in the N range. Accordingly, an automatic transmission comprises a forward-reverse shifting mechanism (3), a loading mechanism (2) and a toroidal transmission unit (1) which are sequentially arranged from the driving source side of a vehicle and further comprises a speed change control device for controlling the operation of the above. A notch (10a) as a rotational speed signalling section is provided on the outer periphery of a loading cam (10), for example, among rotating members in the area from an output member of the above forward-reverse shifting mechanism (3) to an input disc (4) of the above toroidal transmission unit (1), and the notch (10a) is detected by a rotation sensor (28) arranged in the vicinity of the outer periphery to detect the rotational speed of the loading cam (10) and input the same to the speed change control device.