Mazda 5. Manual — part 25
05–17–20
AUTOMATIC TRANSAXLE
lubrication passage of the turbine shaft.
.
End Of Sie
CENTRIFUGAL BALANCE CLUTCH OUTLINE
B3E051701030A11
• The centrifugal balance clutch mechanism, which cancels the centrifugal oil pressure, is adopted for improve
clutch control.
• A bonded seal piston (press-worked component of a piston and a seal) is adopted for each clutch and brake to
reduce the piston size and weight.
End Of Sie
CENTRIFUGAL BALANCE CLUTCH STRUCTURE
B3E051701030A12
• Centrifugal balance clutch chambers are installed opposite the clutch chamber. The centrifugal balance clutch
chambers are constantly filled with ATF from an exclusive hydraulic passage of the turbine shaft.
End Of Sie
3
1
2
4
5
5
5
5
6
6
6
6
7
7
7
7
8
8
12
11
10
9
9
13
12
14
8
8
14
17
19
18
16
15
16
B3E0517A002
1
Forward clutch
2
3-4 clutch
3
Low and reverse brake
4
Reverse clutch
5
Snap ring
6
Retaining plate
7
Drive plate
8
Driven plate
9
Centrifugal balance chamber
10
Seal plate
11
Forward clutch piston (bonded seal piston)
12
Spring and retainer component
13
3-4 clutch piston (bonded seal piston)
14
Dish plate
15
Low and reverse brake piston (bonded seal piston)
16
Piston return spring
17
2-4 brake drum
18
Piston check ball
19
Reverse clutch piston (bonded seal piston)
AUTOMATIC TRANSAXLE
05–17–21
05
CENTRIFUGAL BALANCE CLUTCH OPERATION
B3E051701030A13
When clutch pressure is not applied
• When the clutch drum rotates, centrifugal force acts on the residual ATF in the clutch chamber to push against
the piston. However, centrifugal force also acts on the ATF filling the centrifugal balance clutch chamber to push
back the piston. As a result, the two forces are eliminated and the piston remains stationary, thus preventing
clutch engagement.
When clutch pressure is applied
• When clutch pressure is applied to the clutch chamber, the clutch pressure overcomes the oil pressure and
spring force in the opposite centrifugal balance clutch chamber, and pushes the piston to engage the clutches.
Because the centrifugal force acting on the clutch pressure in the clutch chamber is canceled by another
centrifugal force acting on the ATF filling the centrifugal balance clutch chamber, the influence of the centrifugal
force created by the clutch drum revolution speed is eliminated. As a result, stable piston pushing force is
obtained in all rotation ranges, and smoother shifts can be made.
.
End Of Sie
2-4 BRAKE BAND OUTLINE
B3E051701030A14
• The 2-4 brake band locks the 2-4 brake drum and fixes the rear sun gear. The 2-4 brake band operates in 2GR
or 4GR.
End Of Sie
2-4 BRAKE BAND STRUCTURE
B3E051701030A15
• The 2-4 brake band is set to wind the 2-4 brake drum and one end of the 2-4 brake band is fixed with a band
strut. The servo piston is in the transaxle case.
End Of Sie
2-4 BRAKE BAND OPERATION
B3E051701030A16
• When the hydraulic pressure acts between the servo retainer and the servo piston (2-4 brake band
engagement side), the servo piston acts on the 2-4 brake band to lock the 2-4 brake drum. At the same time,
the servo return spring also works as resistance to obtain the optimal 2-4 brake band engagement force.
When the hydraulic pressure acts between the servo piston and the transaxle case (2-4 brake band release
side), the servo piston is pushed to the servo retainer side. This causes the 2-4 brake band to extend by its own
spring force and unlock the 2-4 brake drum.
7
5
5
8
4
3
6
6
17
18
13
12
14
16
15
10
11
19
9
1
2
6
15
B3E0517T012
1
Structure
2
Operation
3
Clutch drum
4
Clutch
5
Seal
6
Clutch pressure
7
Clutch chamber
8
Bonded seal piston
9
Balance chamber
10
Seal plate
11
Lubrication passage
12
Centrifugal hydraulic pressure of piston chamber
13
Spring force
14
Centrifugal hydraulic pressure of balance chamber
15
Changes according to the rotation speed of clutch
drum
16
Two forces are eliminated
17
Drum revolution speed
18
Piston pushing force
19
Piston pushing force required to obtain shift quality
05–17–22
AUTOMATIC TRANSAXLE
When the hydraulic pressure acts between the servo retainer and the servo piston and between the servo
piston and the transaxle case simultaneously, the servo piston is pushed to the servo retainer side and the 2-4
brake drum is unlocked because of the difference in the two areas and spring force.
.
End Of Sie
ONE-WAY CLUTCH OUTLINE
B3E051701030A17
• The one-way clutch locks the counterclockwise rotation (seen from the torque converter side) of the front
internal gear. The one-way clutch operates in D, M, S, and L range of the first gear.
End Of Sie
ONE-WAY CLUTCH STRUCTURE
B3E051701030A18
• The one-way clutch outer race is integrated with the front internal gear, and the one-way clutch inner race is
fixed to the transaxle case.
End Of Sie
ONE-WAY CLUTCH OPERATION
B3E051701030A19
• The one-way clutch outer race (front internal gear) rotates clockwise (seen from the torque converter side)
freely, but the sprags rise to lock the rotation when the outer race tries to rotate counterclockwise.
• The one-way clutch locks the counterclockwise rotation of the front internal gear, and also locks the
counterclockwise revolution of the rear planetary gear via the rear planetary carrier.
Note
• All direction of rotation are viewed from the torque converter.
7
5
4
3
6
1
2
B3E0517A003
1
Band strut
2
Servo return spring
3
Release side
4
Servo retainer
5
Engagement side
6
Servo piston
7
2-4 brake band
AUTOMATIC TRANSAXLE
05–17–23
05
.
End Of Sie
PLANETARY GEAR OUTLINE
B3E051701030A20
• The planetary gear is a transaxle which converts the driving force of the turbine shaft to the optimal driving
force and transmits it to the output gear through the operation of each clutch and brake.
• A double arranged gear with a single planetary gear unit is adopted for the planetary gear; they are the front
planetary gear and the rear planetary gear (from converter side).
• The planetary gear consists of the internal gear, planetary carrier (pinion gears), and the sun gear.
3
1
2
3
5
4
6
7
B3E0517A004
1
One-way clutch outer race (front internal gear)
cannot rotate
2
One-way clutch outer race (front internal gear) can
rotate
3
One-way clutch inner race (fixed to transaxle case)
4
One-way clutch outer race (front internal gear)
5
One-way clutch
6
One-way clutch inner race
7
Transaxle case
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст