Operation and function
⦆
Clutch pressure not in operation
When the clutch drum is rotated, the centrifugal
force works on the remaining transmission fluid in
clutch chamber, and the force pushes the clutch
piston. However, because the centrifugal force also
works on the transmission fluid charged in the
centrifugal cancel chamber, the clutch piston is
pushed back. Therefore, the clutch piston does not
move because both forces are cancelled by each
other, preventing the clutch drag.
⦆
Clutch pressure in operation
When the clutch pressure works on the cylinder
chamber, the pressure overcomes the facing
centrifugal cancel chamber's hydraulic pressure
and the spring force. Consequently, the clutch
piston is pushed, and the clutch is engaged. At this
time, the centrifugal force that works on the clutch
pressure of cylinder chamber is cancelled out by the
centrifugal force that works on the centrifugal
cancel chamber. Therefore, the effects from
centrifugal force generated by the clutch drum
rotation will be eliminated. For this reason, the
constant clutch piston pushing force is obtained
with all rotations, and smooth shifting has been
achieved.
ZC600780
1
4
5
2
3
6
7
8
9
10
0000
1.
Clutch plate
2.
Clutch drum
3.
Cylinder chamber
4.
Return spring
5.
Centrifugal cancel chamber
6.
Clutch piston
7.
Dish plate
8.
Clutch disc
9.
Retaining plate
10.
Snap ring
One-way clutch
The type of one-way clutch adopted with this A/T is
called as "roller type." Depending on the direction of
torque application, the clutch engages by itself and
transfers the torque. It rotates freely to the opposite
direction, and does not transfer the torque.
23-8
AUTOMATIC TRANSAXLE
CONSTRUCTION AND OPERATION