Infiniti QX56 (Z62). Manual — part 453
DLN-12
< SYSTEM DESCRIPTION >
[TRANSFER: ATX90A]
COMPONENT PARTS
• This sensor uses a thermistor and its electrical resistance varies as the temperature varies. The electrical
resistance decreases as the temperature increases.
Transfer Hi-Lo Position Sensor
INFOID:0000000006222218
Transfer Hi-Lo position sensor detects engagement status of Hi-Lo sleeve and transmits signal to transfer con-
trol unit.
Transfer Rotary Position Sensor
INFOID:0000000006222219
Transfer rotary position sensor detects rotation status of actuator shaft and transmits signal to transfer control
unit.
Transfer Lock Position Sensor
INFOID:0000000006222220
Transfer lock position sensor detects engagement status of lock sleeve and transmits signal to transfer control
unit.
Transfer Fluid Temperature Sensor
INFOID:0000000006222221
• Transfer fluid temperature sensor measures temperature of transfer fluid.
• This sensor uses a thermistor and its electrical resistance varies as the temperature varies. The electrical
resistance decreases as the temperature increases.
STRUCTURE AND OPERATION
DLN-13
< SYSTEM DESCRIPTION >
[TRANSFER: ATX90A]
C
E
F
G
H
I
J
K
L
M
A
B
DLN
N
O
P
STRUCTURE AND OPERATION
Sectional View
INFOID:0000000006222222
Torque Split Mechanism
INFOID:0000000006222223
CONTROL DIAGRAM
1.
Rear companion flange
2.
Main shaft
3.
Rear case
4.
Ball ramp lever
5.
Ball lamp lever
6.
Piston
7.
Clutch
8.
Sprocket
9.
Lock sleeve
10. Hi-Lo sleeve
11.
Sun gear
12. Front case
13. Planetary carrier assembly
14. Internal gear
15. Shift fork
16. Transfer rotary position sensor
17. Front shaft flange
18. Drive chain
19. Actuator shaft
20. Cam
21. Transfer control actuator
JPDIE0277ZZ
DLN-14
< SYSTEM DESCRIPTION >
[TRANSFER: ATX90A]
STRUCTURE AND OPERATION
DESCRIPTION
• Ball ramp lever operates in the direction of main shaft axis according to rotation of actuator shaft and
presses piston. Pressure is applied to each clutch and torque is transmitted.
• Shift fork operates in the direction of main shaft axis according to rotation of actuator shaft and performs
engagement and disengagement to Hi-Lo sleeve and lock sleeve of main shaft. Mode is switched between
4H
⇔
4L.
AUTO MODE
• The optimum torque distribution is electronically performed for front and rear wheels according to road con-
ditions.
• Stable start without wheel spin is possible on slippery road conditions, such as on a snowy road.
• When road condition does not require 4WD driving, the status becomes close to rear wheel drive, which
results in better fuel efficiency and provides FR-like steering characteristics.
• The vehicle cornering status is judged according to information from each sensor, and the optimum torque is
distributed to front wheels for preventing tight-corner braking symptom.
NOTE:
When there is a difference of revolution speed between the front and rear wheel the shift occasionally changes
to direct 4-wheel driving conditions automatically. This is not a malfunction.
4H MODE
• Torque distribution for front and rear wheels is fixed and stable start is achieved while driving on an rough,
sandy or snowy road.
4L MODE
• Large traction force is obtained due to low gear. High running ability and escaping ability are achieved.
• Switching from 4H mode to 4L mode is not possible when the vehicle is not stopped and A/T shift selector is
not in the neutral position.
TORQUE DISTRIBUTION DIAGRAM
JPDIE0256GB
STRUCTURE AND OPERATION
DLN-15
< SYSTEM DESCRIPTION >
[TRANSFER: ATX90A]
C
E
F
G
H
I
J
K
L
M
A
B
DLN
N
O
P
TORQUE DISTRIBUTION FLOW
OPERATION PRINCIPLE
AUTO, 4H MODE
1.
Main shaft
2.
Clutch
3.
Sprocket
4.
Lock sleeve
5.
Hi-Lo sleeve
6.
Sun gear
7.
Planetary carrier assembly
8.
Front shaft flange
9.
Drive chain
JPDIE0271GB
JPDIE0257GB
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