Nissan Juke F15. Manual — part 1244
TM-166
< SYSTEM DESCRIPTION >
[CVT: RE0F10B]
STRUCTURE AND OPERATION
TRANSAXLE : Belt & Pulley
INFOID:0000000012200873
STRUCTURE
MECHANISM
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).
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 (A) and two steel rings (B)
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
JSDIA2428GB
JSDIA2431ZZ
STRUCTURE AND OPERATION
TM-167
< SYSTEM DESCRIPTION >
[CVT: RE0F10B]
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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.
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.
FLUID COOLER & FLUID WARMER SYSTEM
FLUID COOLER & FLUID WARMER SYSTEM : System Description
INFOID:0000000012200874
CVT FLUID COOLER SCHEMATIC
JSDIA2429GB
TM-168
< SYSTEM DESCRIPTION >
[CVT: RE0F10B]
STRUCTURE AND OPERATION
COMPONENT DESCRIPTION
CVT Oil Warmer
• The CVT oil warmer (1) is installed on the front part of transaxle
assembly.
• When engine is started while engine and CVT are cold, engine
coolant temperature rises more quickly than CVT fluid tempera-
ture. CVT oil warmer is provided with two circuits for CVT and
engine coolant respectively so that warmed engine coolant warms
CVT quickly. This helps shorten CVT warming up time, improving
fuel economy.
• A cooling effect is obtained when A/T fluid temperature is high.
Heater Thermostat
The heater thermostat (1) is installed on the front part of transaxle
assembly.
MECHANICAL SYSTEM
JSDIA2826GB
JSDIA2228ZZ
JSDIA2439ZZ
STRUCTURE AND OPERATION
TM-169
< SYSTEM DESCRIPTION >
[CVT: RE0F10B]
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MECHANICAL SYSTEM : System Diagram
INFOID:0000000012200875
MECHANICAL SYSTEM : System Description
INFOID:0000000012200876
Traction force of engine is transmitted to wheel via torque converter, planetary gear, belt, pulley, differential
gear, and others. Also includes a parking mechanism that mechanically fixes secondary pulley when selector
lever is shifted to the “P” position.
ACTIVATION STATE ACCORDING TO EACH SHIFTING
×: Operates
POWER TRANSMISSION
“P” position
• Traction force from input shaft is not transmitted to primary pulley because forward clutch and reverse brake
are not engaged and run idle.
• Torque from the wheels is not transmitted to secondary pulley because secondary pulley is mechanically
fixed when parking pole that is linked with selector lever is engaged with parking gear that is integrated with
secondary pulley.
JSDIA2432GB
Selector lever position
Secondary
pressure
sensor
Solenoid valve
Step motor
Line pres-
sure sole-
noid valve
Secondary
pressure sole-
noid valve
Torque con-
verter solenoid
valve
Lock-up select sole-
noid valve
P
×
×
×
×
R
×
×
×
×
×
N
×
×
×
×
×
D (Low)
×
×
×
×
×
D (High)
×
×
×
×
×
D
(Lock-up)
×
×
×
×
×
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