POWERTRAIN OPERATION


BHE051301026T09

Component description

Component

Function

Low clutch
• Transmits rotation of low clutch drum to rear internal gear
• Operates in 1GR, 2GR, or 3GR position
High clutch
• Transmits rotation of high clutch drum to front planetary carrier
• Operates in 3GR or 4GR position
Reverse clutch
• Transmits rotation of reverse clutch drum to front sun gear
• Operates when vehicle is reversing
2-4 brake
• Prevents rotation of front sun gear
• Operates in 2GR or 4GR position
Low and reverse brake
• Prevents rotation of front planetary carrier
• Operates when vehicle is reversing or in 1GR position (M range)
Low one-way clutch
• Locks clockwise rotation of front planetary carrier in 1GR position
Planetary gear
• The planetary gear functions as a transmission due to the engagement/disengagement of clutches and/or brakes, converts the transmitted driving force of the input shaft by multiplying/ reducing torque or reversing power flow, and then transmitting it to the output shaft.

Powerflow

P position

1
Front planetary carrier
2
Front pinion gear
3
Front sun gear
4
Input shaft
5
High clutch
6
Reverse clutch
7
Rear sun gear
8
Low clutch
9
Low and reverse brake
10
Low one-way clutch
11
Output shaft
12
Rear internal gear
13
Rear pinion gear
14
Rear planetary carrier
15
Front internal gear
16
2-4 brake
17
In relation to pinion
18
Input
19
Output
20
Fixed
21
Pinion
22
Input (partial)
23
Parking pawl

R position

1
Front planetary carrier
2
Front pinion gear
3
Front sun gear
4
Input shaft
5
High clutch
6
Reverse clutch
7
Rear sun gear
8
Low clutch
9
Low and reverse brake
10
Low one-way clutch
11
Output shaft
12
Rear internal gear
13
Rear pinion gear
14
Rear planetary carrier
15
Front internal gear
16
2-4 brake
17
In relation to pinion
18
Input
19
Output
20
Fixed
21
Pinion
22
Input (partial)
23
Parking pawl

N position

1
Front planetary carrier
2
Front pinion gear
3
Front sun gear
4
Input shaft
5
High clutch
6
Reverse clutch
7
Rear sun gear
8
Low clutch
9
Low and reverse brake
10
Low one-way clutch
11
Output shaft
12
Rear internal gear
13
Rear pinion gear
14
Rear planetary carrier
15
Front internal gear
16
2-4 brake
17
In relation to pinion
18
Input
19
Output
20
Fixed
21
Pinion
22
Input (partial)
23
Parking pawl

D range 1GR

1
Front planetary carrier
2
Front pinion gear
3
Front sun gear
4
Input shaft
5
High clutch
6
Reverse clutch
7
Rear sun gear
8
Low clutch
9
Low and reverse brake
10
Low one-way clutch
11
Output shaft
12
Rear internal gear
13
Rear pinion gear
14
Rear planetary carrier
15
Front internal gear
16
2-4 brake
17
In relation to pinion
18
Input
19
Output
20
Fixed
21
Pinion
22
Input (partial)
23
Parking pawl

M range 1GR

1
Front planetary carrier
2
Front pinion gear
3
Front sun gear
4
Input shaft
5
High clutch
6
Reverse clutch
7
Rear sun gear
8
Low clutch
9
Low and reverse brake
10
Low one-way clutch
11
Output shaft
12
Rear internal gear
13
Rear pinion gear
14
Rear planetary carrier
15
Front internal gear
16
2-4 brake
17
In relation to pinion
18
Input
19
Output
20
Fixed
21
Pinion
22
Input (partial)
23
Parking pawl

D, M range 2GR

1
Front planetary carrier
2
Front pinion gear
3
Front sun gear
4
Input shaft
5
High clutch
6
Reverse clutch
7
Rear sun gear
8
Low clutch
9
Low and reverse brake
10
Low one-way clutch
11
Output shaft
12
Rear internal gear
13
Rear pinion gear
14
Rear planetary carrier
15
Front internal gear
16
2-4 brake
17
In relation to pinion
18
Input
19
Output
20
Fixed
21
Pinion
22
Input (partial)
23
Parking pawl

D, M range 3GR

1
Front planetary carrier
2
Front pinion gear
3
Front sun gear
4
Input shaft
5
High clutch
6
Reverse clutch
7
Rear sun gear
8
Low clutch
9
Low and reverse brake
10
Low one-way clutch
11
Output shaft
12
Rear internal gear
13
Rear pinion gear
14
Rear planetary carrier
15
Front internal gear
16
2-4 brake
17
In relation to pinion
18
Input
19
Output
20
Fixed
21
Pinion
22
Input (partial)
23
Parking pawl

D, M range 4GR

1
Front planetary carrier
2
Front pinion gear
3
Front sun gear
4
Input shaft
5
High clutch
6
Reverse clutch
7
Rear sun gear
8
Low clutch
9
Low and reverse brake
10
Low one-way clutch
11
Output shaft
12
Rear internal gear
13
Rear pinion gear
14
Rear planetary carrier
15
Front internal gear
16
2-4 brake
17
In relation to pinion
18
Input
19
Output
20
Fixed
21
Pinion
22
Input (partial)
23
Parking pawl