Five-speed automatic transmission

Details Five-speed automatic transmission Five-speed automatic transmission

1992-10-23

1993-10-19

Wright, Dirk

Planetary gear transmission systems or components

With means to vary drive ratio or disconnect drive

Plural elements selectively braked

F16H 362

Patent

active

052540537

ABSTRACT:
A five-speed automatic transmission includes a main transmission and an over-drive transmission of a front disposition type. The main transmission includes three sets of planetary gears, a clutch for engaging and disengaging speed-change elements of the planetary gear sets, and a brake for fixing and releasing the speed change elements, and provides for four forward speed ranges and one reverse speed range. In the over-drive transmission of a front disposition type, a speed change element of an over-drive planetary gear set connected to an input element of the main transmission is adapted to be engaged, disengaged and fixed for achieving either a directly coupled stage or an over-drive stage. The over-drive transmission releases the direct coupling for reverse driving operation. One of the clutches of the main transmission for achieving the directly coupled stage and one of the brakes for achieving the low speed stage are engageable in the reverse driving operation.

REFERENCES:
patent: 3225627 (1965-12-01), Christenson
patent: 3267769 (1966-08-01), Tuck et al.
patent: 3313183 (1967-04-01), Bailey et al.
patent: 3941013 (1976-03-01), Miller
Automobiltechische Zeitschrift 91, 1989 Sep. pp. 445-447.

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