2012 SSANGYONG RODIUS Service Manual

06-16

06-171914-01
1. SYSTEM DESCRIPTION OF E-VGT
(Electric-Variable Geometry Turbine)
The E-VGT turbocharger has one shaft where at each ends are installed with two turbines having
different angles to connect one end of housing to the intake manifold and the other end to the
exhaust manifold. As the turbine, at exhaust end, is rotated by exhaust gas pressure the impeller,
at intake end, gets rotated to send air around center of the impeller, being circumferentially
accelerated by the centrifugal force, into the diffuser. The air, which has been introduced to the
diffuser having a passage with big surface, transforms its speed energy into the pressure energy
while being supplied to the cylinder improving the volume efficiency.
Also, the exhaust efficiency improves as the exhaust turbine rotates. The turbocharger is often
referred to as the exhaust turbine turbocharger.
Diffuser: With the meaning of spreading out it is a device that transforms fluid's speed energy into
the pressure energy by enlarging the fluid's passage to slow down the flow.
The E-VGT system installed to the D20DTR engine variably controls the passages of the turbine
housing to regulate the flow rate of the exhaust gas. The actuator of E-VGT is a DC motor
actuator (EActuator) which controls more quickly and precisely than the previous vacuum type
actuator.

06-18
Maximizes the intake air charging efficiency (Approx. 15%) -Optimizes the exhaust gas flow rate by controlling the vanes inside the turbine housing with
the EActuator. 1.
(2) E-VGT Actuator (Electric-Actuator)
Target temperature and airflow control -Enhanced emmission control: By temperature control with CDPF system 1.
(1) Performance (for EURO V)
Has a faster response time than the conventional vacuum actuator. 2.
Improved low speed torque, high speed power and fuel economy.
Improved acceleration performance with rapid response time of vane. -
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1) Features
Features
Benefits
Folding and unfolding of the vane
is controlled electrically
Easy to get low speed air volume
Rapid response time
Electric control -
-
-
-
Improved low speed torque and
power
Reduced exhaust gas
Improved fuel consumption
Improved acceleration
performance -
-
-
-

06-191914-01
2. COMPONENTS
Atmospheric pressure, RPM
signal <00510047006d009600990047008b008c009b008800900093009a0047008800890096009c009b0047008a00960095009b009900960093004700930096008e0090008a005300470099008c008d008c00990047009b00960047006a008f00880097009b008c00
99004702c8006c0095008e00900095008c0047006a00960095>trol”.
E-VGT turbocharger
Improves engine powerAccelerator pedal position
sensor
Transfers driver's will to
accelerate to ECUEngine ECU (D20DTR)
E-VGT duty control
Coolant temperature sensor
Operates the VGT according
to engine warm-upHFM sensor
Improves the engine powerT-MAP sensor
Booster pressure and
temperature

06-20
3. INPUT/OUTPUT DEVICES

06-211914-01
Control
rangeTurbocharger
driving
mechanismControl methodEffectImproved
performance
At low
speedNarrows the
flow passage
for the exhaust
gas by folding
the vanesThe flow rate is
increased as the
exhaust gas passes
the narrow passage
→ Increased
turbine & impeller
speed, Increased
compressive forceImproved
low speed
torque
4. OPERATING PRINCIPLES
The E-VGT is designed to get more improved engine power in all ranges by controlling the turbine
as follows:
1) How it Works at Low Speed
Normal turbocharger cannot get the turbo effect because the amount of exhaust gas is not
enough and the flow speed is slow in a low speed zone, but VGT allows the flow passage of
exhaust to narrow, resulting in increasing the flow speed of exhaust gas and running the turbine
quickly and powerfully.
Therefore, as VGT can intake more air than normal turbocharger, it can give the benefit of the
increased output even in a low speed zone.
Turbocharger lag
The turbocharger is at idle speed when there is no load or it is in the normal driving condition.
During this period, the amount of exhaust gas passing through the turbine is not enough to turn
the compressor wheel (impeller) fast. Therefore, the intake air is not compressed as needed.
Because of this, it takes time for turbocharger to supply the additional power after the
accelerator pedal is depressed. This is called "turbocharger lag".Basic principle at low speed
At low speed, it utilizes the principle of
venturi.
For example, when air flows through the
venturi tube, the flow speed is faster and the
pressure is lower at the point "A". In this case,
if the inner
diameter of venturi is more narrowed, the flow
speed is so much faster (refer to the
equation). ※

06-22
2) How it Works at High Speed
In a high speed zone, the amount of exhaust gas increases and it is accompanied with a great
force. Therefore, if the inner diameter of venturi is more widened, the turbine in the turbocharger
by the releasing force of abundant exhaust gas can deliver a more increased energy to the
compressor. The output will increase in submission to the increase of intake air volume.
Control
rangeTurbocharger driving
mechanismControl
methodEffectImproved
performance
At high
speedExpands the
flow passage
for the exhaust
gas by
unfolding the
vanesThe flow rate is
increased due to the
expanded
passage→
Increased turbine &
impeller speed,
Increased
compressive forceImproved
maximum
power

07-31543-00
1. SPECIFICATION
The engine oil filter element should be changed at the same time with the engine oil.
Regularly check the engine oil level and add the engine oil if necessary.
Remember to check the engine oil level and shorten the cycle to replace the engine oil
under severe driving conditions. -
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Severe Driving Condition
Frequent stop-and-go traffic, extended idling, short driving distance below 6 km, driving
distance below 16 km when the outside temperature remains below freezing
Driving in a hilly or mountainous terrain, sandy, or dusty area
High load driving such as trailer towing
Taxi, patrol service or delivery service (extended idling and excessive driving with low speed) -
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-
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Unit Specification
Oil pump Lubrication system Gear pump, forced circulation
Type Inscribed gear
Capacity 63 L at 4,000 rpm
Relief pressure5.8 bar ± 0.3 bar
Oil filter Type Full flow/Paper element
Engine oil Specified oil SAE 5W30 (approved by MB SHEET 229.51)
Capacity (L) Min.: 4.5 L
Max.: 6.0 L
Service
intervalEU Change every 20,000 km or 12 months
(The service interval should be shortened under
severe conditions)
General Change every 15,000 km or 12 months
(The service interval should be shortened under
severe conditions)
Oil injection nozzle Type Piston
Operating pressure 1.5bar
Closing pressure 1.0bar
Oil flow 4 L/min
Oil pressure switch Permissible pressure 10bar