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POWER TRAIN MECHANISM
DESCRIPTION
In the power train mechanism, the power that has been trans-
mitted from the engine to the input shaft of the transmission
through the torque converter is transmitted from various
clutches to the planetary gear, using reduction ratios optimum
for the running condition.
CONSTRUCTION
(1) Planetary gear
A Ravingeau type planetary gear is employed.
The following are the main components: Intermediate shaft,
front planetary sun gear, planetary short pinion, planetary long
pinion, rear planetary sun gear and planetary output shaft.
The input section of the driving force at the planetary gear unit
section is composed of three systems: One is the intermedi-
ate shaft; another is the front planetary sun gear; and the third
is the rear planetary sun gear.
This input section is switched by making gear shifts.
Furthermore, the output section is the planetary output shaft.
(2) Shift control element
The shift control element consists of three kinds of wet type multiple-disc clutches, namely, the direct clutch
(C1), forward clutch (C2) and rear clutch (C3), as well as the 1st & reverse brake (B2) of the wet type multi-
ple-disc brake, the 2nd brake (B1) of the band type brake, and the one-way clutch (F). Moreover, the fol-
lowing table shows functions of each control element.
Functions of Each Shift Control Element
Shift control element
Direct clutch (C1)
Forward clutch (C2)
Rear clutch (C3)
2nd brake band (B1)
1st & reverse brake (B2)
One-way clutch (F)
Connects input shaft with front planetary sun gear.
Connects input shaft with rear planetary sun gear.
Connects input shaft with intermediate shaft.
Locks front planetary sun gear.
Prevents planetary carrier from rotating.
Prevents planetary carrier from rotating counterclockwise.
Planetary
Intermediate shaft
short pinion
Front planetary
Planetary long
sun gear
pinion
Operations
AT–5
JAT00006-00000
Planetary
output shaft
Rear planetary
sun gear
JAT00007-00004
JAT00008-00000
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