SsangYong Rodius (2013 year). Service manual - part 66

06-18

Maximizes the intake air charging efficiency (Approx. 15%)

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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

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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

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Improved low speed torque and 

power

Reduced exhaust gas

Improved fuel consumption

Improved acceleration

performance

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06-19

1914-01

2. COMPONENTS

Atmospheric pressure, RPM

signal

* For details about control logic, refer to Chapter “Engine Control”.

E-VGT turbocharger

Improves engine power

Accelerator pedal position 

sensor

Transfers driver's will to
accelerate to ECU

Engine ECU (D20DTR)

E-VGT duty control

Coolant temperature sensor

Operates the VGT according to 
engine warm-up

T-MAP sensor

Improves the engine power

HFM sensor

Booster pressure and
temperature

06-20

3. INPUT/OUTPUT DEVICES

06-21

1914-01

Control

range

Turbocharger 

driving

mechanism

Control 

method

Effect

Improved

performance

At low

speed

Narrows the 
flow passage for 
the exhaust gas 
by folding the 
vanes

The flow rate is
increased as the
exhaust gas passes 
the narrow passage
→ Increased
turbine & impeller
speed, Increased
compressive force

Improved

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).

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