SSANGYONG RODIUS 2007 Service Manual

0-7
TORQUE ON DEMAND
RODIUS 2006.09
3240-01
2) Transfer Case
(1) Planetary gear set
Planetary Gear set consists of sun gear, ring gear and carrier. It is engaged with the gear in
“HIGH-LOW” collar to increase the driving force by reducing vehicle speed.
Sun gear is connected to input shaft and ring gear is fixed into the transfer case.
Splined rear output shaft is able to slide on the “HIGH - LOW” collar.
The inside and outside ends of “HIGH - LOW” collar have machined gear. The input
shaft transmits the power to driving wheels by engaging with sun gear and carrier gear.
If the 4WD switch is at “4WD HIGH”, the TOD control unit operates the shift motor to
engage “HIGH - LOW” collar directly with input shaft for transmitting the driving force
to front and rear propeller shafts.
When a driver selects “4WD LOW”, the TOD control unit controls the electro-magnetic
clutch and operates the shift motor to engage “HIGH - LOW” collar with carrier.
The power from transmission is increased up to 2.48:1 by reduction ratio from planetary
gear, and then is sent to front and rear propeller shafts. null
(2) Ball type slant cam and clutch
disc pack
If the speed sensors installed on front and
rear propeller shafts detect the slips at front
and rear wheels, and these slips exceed
the specified range, TOD control unit
controls electromagnetic clutch to transmit
driving force to front wheels.
At this time, ball slant cam is moved to
compress multi-disc located in clutch disc to
transmit driving force to front wheels.

0-8
RODIUS 2006.09
3240-01
TORQUE ON DEMAND
(3) Electro Magnetic Clutch (EMC)
EMC consists of coil and housing. TOD control unit controls EMC by controlling duty cycle
according to the road and driving conditions. These controls use the continuity time and amount
of electric current to determine the torque to be transmitted to front wheels.
Basic controls in EMC ▶

0-9
TORQUE ON DEMAND
RODIUS 2006.09
3240-01
3) Signal Flow

0-10
RODIUS 2006.09
3240-01
TORQUE ON DEMAND
4) Power Flow
(1) 4H Mode (4WD Drive - High Speed)

0-11
TORQUE ON DEMAND
RODIUS 2006.09
3240-01
(2) 4H Mode (4WD Drive - Low Speed)

0-12
RODIUS 2006.09
3240-01
TORQUE ON DEMAND
3. OPERATION
1) System Layout

0-13
TORQUE ON DEMAND
RODIUS 2006.09
3240-01
2) 4WD Operation Overview
To make the mode shift easier, stop the vehicle, depress the brake pedal, select the mode
switch, and move the selector lever with the sequence of [N-P-N].
3) Mode Switch
Selection Mode ▶
The TOD system has 2 selectable mode, 4H and 4L.
4H is the normal operating mode when drive of which gear ratio is 1:1 and 4L mode distributes
power to front and rear wheels 50:50 of which gear ratio is 2.48:1.
4L Mode ▶
When selecting 4L mode, EMC is locked to apply maximum torque into front and rear propelle
r
shafts (when the wheel speed is more than 87Hz).
Shift motor rotates also 4L position by rotation of cam thus propeller shaft torque changes from
1:1 to 2.48:1 by planetary gear set.
Releasing the 4L Mode ▶
When selecting 4H mode, 4L drive mode is
released and 4H mode is resumed.
“4H” switch: Self-return type
“4L” switch: Push lock type ·
·

0-14
RODIUS 2006.09
3240-01
TORQUE ON DEMAND
4. CIRCUIT DIAGRAM

0-3
PROPELLER SHAFT
RODIUS 2006.09
3310-01
3310-01PROPELLER SHAFT
1. PROPELLER SHAFT GENERAL INFORMATION
The propeller shaft transfers the power through
the transmission and transfer case to the
front/rear axle differential carrier (final reduction
gear). It is manufactured by a thin rounded steel
pipe to have the strong resisting force against
the torsion and bending. Both ends of propelle
r
shaft are connected to the spider and the cente
r
of propeller shaft is connected to the spline to
accommodate the changes of the height and
length. The rubber bushing that covers the
intermediate bearing keeps the balance of rea
r
propeller shaft and absorbs its vibration.
2. SPECIFICATION

0-4
RODIUS 2006.09
3310-01
PROPELLER SHAFT
1. COMPONENTS AND LOCATION
1) Front Prepeller Shaft Assembly
2) Rear Prepeller Shaft Assembly
Bolt Bolt
CV joint Front propeller shaft assembly
Universial joint
Bolt/was
her/nut
Universial joint
1st rear propeller shaft
Center bearing assembly
CV joint
2nd rear propeller shaft
Universial joint
Bolt