2012 SSANGYONG NEW ACTYON SPORTS torque

02-16
2) Belt Tensioner
(1) Overview
The torque deviation from crankshaft affects the components in belt drive system and the belt
movement. The auto tensioner system is to adjust this deviation automatically.
In D20DTR engine, one of the mechanical tensioner, pivot damped tensioner is used to keep the
damping force, system reliability and durability. The single belt drive system needs to use the
automatic belt tensioning device to transfer the power to pulleys effectively. To get this, the
tensioner uses the spring and damping unit.
(2) Location
Belt tensioner

02-20
1) Functions
Appearance Type and function
Front mounting insulator (Right side) Type: Rubber mounting
Function: Supports the torque reaction
Front mounting insulator (Left side) Type: Rubber mounting
Function: Supports the torque reaction
Rear mounting insulato Type: Rubber mounting
Function: Supports the powertrain rod

02-36
Torque change curve of engine and drive shaft
Compression stroke Combustion stroke
Small changes from engine (k):
Damper increases the torque changes to clutchLarge changes from engine (j):
Damper decreases the torque changes to
transaxle by absorbing the impact
3) Operation
Compensating the irregular operation of engine: The secondary flywheel operates almost
evenly so does not cause gear noises
The mass of the primary flywheel is less than conventional flywheel so the engine irregularity
increases more (less pulsation absorbing effect).
Transaxle protection function: Reduces the torsional vibration to powertrain (transaxle) by
reducing the irregularity of engine. -
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02-370000-00
4) Features
Reduced vibration noise from the powertrain by blocking the torsional vibrations
Enhanced vehicle silence and riding comforts: reduced engine torque fluctuation
Reduced shifting shocks
Smooth acceleration and deceleration -
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5) Advantages
Improved torque response by using 3-stage type spring: Strengthens the torque response in
all ranges (low, medium, and high speed) by applying respective spring constant at each
range.
Stable revolution of the primary and secondary wheel by using planetary gear: Works as
auxiliary damper against spring changes
Less heat generation due to no direct friction against spring surface: Plastic material is
covered on the spring outer surface
Increased durability by using plastic bushing (extends the lifetime of grease) -
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6) Drive Plate
Drive plate receives the power from the start motor when starting the engine. With this, the drive
plate initially drives the power train system. And, it is connected to the torque converter to transfer
the engine torque to the power train system.
Trigger ring
Drive plate
Components ▶

03-52210-01
Follow the job procedures. If you find a defective component, replace it with new one. 5.
Once disconnected, the fuel pipes between HP pump and fuel rail and between fuel rail and each
injector should be replaced with new ones. The pipes should be tightened tospecified tightening
torques during installation. Over or under torques out of specified range may cause damages and
leaks at connections. Once installed, the pipes have been deformed according to the force
during installation, therefore they are not reusable. The copper washer on injector should be
replaced with new one. The injector holder bolt should be tightened to specified tightening torque
as well. If not, the injection point may be deviated from correct position, and it may cause engine
disorder.
Plug the removed components with clean and undamaged sealing caps and store it into the
box to keep the conditions when it was installed. 6.
To supply the fuel to transfer line of HP
pump press the priming pump until it
becomes hard. 7.
Priming pump
Priming pump cap
Fuel filter assembly
Check the installed components again and connect the negative battery cable. Start the
engine and check the operating status.
With Scan Tool, check if there are current faults and erase the history faults. 8.
9.

03-18
3. CAUTIONS FOR DI ENGINE
1) Cautions for DI Engine
This chapter describes the cautions for DI engine equipped vehicle. This includes the water
separation from engine, warning lights, symptoms when engine malfunctioning, causes and
actions.
DI Engine 1.
Comparatively conventional diesel engines, DI engine controls the fuel injection and timing
electrically, delivers high power and reduces less emission..
System Safety Mode 2.
When a severe failure has been occurred in a vehicle, the system safety mode is activated to
protect the system. It reduces the driving force, restricts the engine speed (rpm) and stops
engine operation. Refer to "Diagnosis" section in this manual.
Engine CHECK Warning Lamp 3.
The Engine CHECK warning lamp on the instrument cluster comes on when the
fuel or major electronic systems of the engine are not working properly. As a result,
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Water Separator Warning Lamp 4.
When the water level inside water separator in fuel filter exceeds a certain level
(approx. 45 cc), this warning light comes on and buzzer sounds.
Also, the driving force of the vehicle decreases (torque reduction). If these
conditions occur, immediately drain the water from fuel filter.

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 E-Actuator. 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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2) Features
Features
BenefitsFolding 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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06-211914-01
Control
rangeTurbocharger driving
mechanismControl method
EffectImproved
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). ※