Nissan X-Trail 32. Manual — part 2072
TM-246
< SYSTEM DESCRIPTION >
[CVT: RE0F10D]
STRUCTURE AND OPERATION
STRUCTURE AND OPERATION
TRANSAXLE
TRANSAXLE : Cross-Sectional View
INFOID:0000000010622444
Converter housing
Oil pump
Planetary gear
Control valve
Oil pan
Steel belt
Primary pulley
Secondary pulley
Side cover
Transaxle case
Differential case
Final gear
Reduction gear
Idler gear
Output gear
Drive sprocket
Torque converter
Driven sprocket
Oil pump chain
2WD
4WD
JSDIA5169ZZ
STRUCTURE AND OPERATION
TM-247
< SYSTEM DESCRIPTION >
[CVT: RE0F10D]
C
E
F
G
H
I
J
K
L
M
A
B
TM
N
O
P
TRANSAXLE : Operation Status
INFOID:0000000010622445
×
: Engaged or applied.
TRANSAXLE : Transaxle Mechanism
INFOID:0000000010622446
TORQUE CONVERTER (WITH LOCK-UP FUNCTION)
The torque converter is a system that increases the engine torque and transmits the torque to the transaxle. A
symmetrical 3-element, 1-stage, 2-phase type is used here.
OIL PUMP
Utilizes a vane-type oil pump that is driven by the engine through the oil pump drive chain in order to increase
efficiency of pump discharge volume in low-speed zone and optimize pump discharge volume in high-speed
zone. Discharged oil from oil pump is transmitted to control valve. It is used as the oil of primary and second-
ary pulley operation, the oil of clutch operation, and the lubricant for each part.
PLANETARY GEAR
• A planetary gear type of forward/reverse selector mechanism is installed between the torque converter and
primary pulley.
• The power from the torque converter is input via the input shaft, operating a wet multi-plate clutch by means
of hydraulic pressure to switch between forward and reverse driving.
Operation of Planetary gear
BELT & PULLEY
It is composed of a pair of pulleys (the groove width is changed freely in the axial direction) and the steel belt
(the steel plates are placed continuously and the belt is guided with the multilayer steel rings on both sides).
Selector lever
position
Parking mech-
anism
Forward
clutch
Reverse brake
Primary pulley
Secondary
pulley
Steel belt
Final drive
P
×
R
×
×
×
×
×
N
D, M
×
×
×
×
×
JSDIA2426GB
TM-248
< SYSTEM DESCRIPTION >
[CVT: RE0F10D]
STRUCTURE AND OPERATION
The groove width changes according to wrapping radius of steel belt and pulley from low status to overdrive
status continuously with non-step. It is controlled with the oil pressures of primary pulley and secondary pulley.
Steel Belt
It is composed of multiple steel plates
and two steel rings
stacked to a several number. The feature of this steel belt transmits
power with compression of the steel plate in contrast with transmis-
sion of power in pulling with a rubber belt. Friction force is required
with the pulley slope to transmit power from the steel plate. The force
is generated with the following mechanism:
Oil pressure applies to the secondary pulley to nip the plate.
⇒
The
plate is pushed and extended outward.
⇒
The steel ring shows with-
stands.
⇒
Pulling force is generated on the steel ring.
⇒
The plate of
the primary pulley is nipped between the pulley.
⇒
Friction force is
generated between the steel belt and the pulley.
Therefore, responsibilities are divided by the steel plate that trans-
mits the power with compression and the steel ring that maintains necessary friction force. In this way, the
tension of the steel ring is distributed on the entire surface and stress variation is limited, resulting in good
durability.
Pulley
The primary pulley (input shaft side) and the secondary pulley (output shaft side) have the shaft with slope
(fixed cone surface), movable sheave (movable cone surface that can move in the axial direction) and oil pres-
sure chamber at the back of the movable sheave.
JSDIA2428GB
JSDIA2431ZZ
STRUCTURE AND OPERATION
TM-249
< SYSTEM DESCRIPTION >
[CVT: RE0F10D]
C
E
F
G
H
I
J
K
L
M
A
B
TM
N
O
P
The movable sheave slides on the shaft to change the groove width of the pulley. Input signals of engine load
(accelerator pedal opening), primary pulley speed and secondary pulley speed change the operation pres-
sures of the primary pulley and the secondary pulley, and controls the pulley groove width.
FINAL DRIVE AND DIFFERENTIAL
The deceleration gears are composed of 2 stages: primary deceleration (output gear, idler gear pair) and sec-
ondary deceleration (reduction gear, final gear pair). All of these gears are helical gears.
JSDIA2429GB
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст