SsangYong: Engine Euro 4. Manual — part 24
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EFFECTIVE DATE
AFFECTED VIN
21
2433
EXHAUST SYSTEM
D27DTP/D27DT (EU4) SM - 2006.08
D27DTP/D27DT (EU4)
ENGINE
FUEL
I
N
T
AKE
EXHAUST
PRE-HEA
TING
LUB
COOLING
SWITCHABLE
ECU
DIAGNOSIS
2. Disconnect the vacuum hoses (1, 2) from vacuum
modulator.
Removal and Installation
1. Disconnect the vacuum modulator connector.
2. REMOVAL AND INSTALLATION OF VACUUM MODULATOR
Vacuum Flow
Booster
Vacuum pump
Connected to
VGT turbocharger
actuator
1. Vacuum hose to VGT
turbocharger
2. Vacuum hose to
vacuum pump
Switchable engine mounting solenoid
(or IWE locking hub for P/T 4WD vehicle)
To atmosphere
Connector
Vacuum
pump
VGT vacuum
actuator
Vacuum Modulator
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EXHAUST SYSTEM
D27DTP/D27DT (EU4) SM - 2006.08
D27DTP/D27DT (EU4)
3. Unscrew the mounting bolt and remove the vacuum modulator (Tightening torque: 10 ± 1.0 Nm).
4. Install in the reverse order of removal.
Mounting bolt
Vacuum modulator
To atmosphere
Connector
Vacuum
pump
VGT vacuum
actuator
Vacuum Modulator
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EFFECTIVE DATE
AFFECTED VIN
23
2411
EXHAUST SYSTEM
D27DTP/D27DT (EU4) SM - 2006.08
D27DTP/D27DT (EU4)
ENGINE
FUEL
I
N
T
AKE
EXHAUST
PRE-HEA
TING
LUB
COOLING
SWITCHABLE
ECU
DIAGNOSIS
1. SPECIFICATIONS FOR ENGINE WITH CDPF
D27DT + CDPF (Catalytic Diesel Particulate Filter)
Engine
Cylinder
Displacement
(cc)
Compression ratio
Max. Power
(ps/rpm)
Tightening torque
(kg.m/rpm)
Idle speed
Valve
Camshaft
Fuel system
Catalytic
converter &
filter
Lubrication
system
Cooling
system
Type/Number
Inner diameter
(mm)
Stroke
(mm)
For Automatic Transmission
Intake
Exhaust
Type
Fuel type
Fuel pump type
Fuel supply pressure
Water separation in fuel filter
Fuel tank capacity
( )
Type
Metal type
Metal weight
(g)
Volume
(cm
3
)
Metal ratio (Pt:PD:Rh)
Oil specification
Lubrication type
Oil filter type
Oil capacity
( )
Cooling type
Cooling fan operation type
Thermostat
(* Full open 100°C)
Coolant capacity
( )
D27DT/5-cylinder
86.2
92.4
2696
18:1
165/4,000
35.7/2,000 ~ 3,000
760 ± 50 rpm
16°
33°
46°
21°
DOHC
Low sulfur diesel
Vane pump in HP pump
HP pump inlet port: max. 400 mbar
HP pump outlet port (with IMV fully open): over 1,050 bar
at every 10,000 km
78
Oxidizing catalyst/DPF
Platinum
Catalyst DOC: 110g/ft
3
Catalyst DPF: 18g/ft
3
Catalyst DOC: 1,200
Catalyst DPF: 3,900
Pt Only
SAE 10W40, 5W40
(MB Sheet 229.1, 229.3 approved oil)
Gear pump, forced circulation
Full flow type, filter element type
6.5 ~ 8.5
Water cooling, forced circulation
Belt operated type
85
WAX Pellet Type
11.5
Specifications (D27DT Engine)
Descriptions
Opens (btdc)
Closes (abdc)
Opens(bbdc)
Closes (atdc)
Opening
temperature (°C)
Type
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EXHAUST SYSTEM
D27DTP/D27DT (EU4) SM - 2006.08
D27DTP/D27DT (EU4)
2. OVERVIEW
As the solution for environmental regulations and PM (Particla Material) of
diesel engine, the low emission vehicle is getting popular. This vehicle is
equipped with an extra filter to collect the soot and burn it again so that the
amount of PM in the exhaust gas passed through the DOC (Diesel Oxydation
Catalyst) is reduced. The CDPF (Catalyst & Diesel Particulate Filter) is an
integrated filter including DOC (Diesel Oxydation Catalyst) and DPF (Diesel
Particulate Filter).
3. MAJOR CHANGES FOR CDPF SYSTEM
The CDPF system is installed for D27DT engine and the major changes are as follows.
The engine ECU has been revised since terminals
have been added for front/rear temperature
sensors, differential sensor and vacuum modulator
for controlling throttle flap.
Its version is 3.1, but it is not compatible with ECU
without CDPF.
Differential Pressure Sensor
(
ΔP sensor)
As the soot is filtered in the
CDPF, the pressure between
the front side and the rear side
of the filter is different from
each other. If the amount of soot
is over 28 g, the soot is burnt in
the CDPF. The combustion is
determined depending on the
pressure difference, tempera-
ture of exhaust gas and EGR
ratio. According to these, the
soot filtered by post injection of
injector is burnt at 600°C.
CDPF (Catalyst & Diesel Particulate Filter) and Sensors
The two temperature sensors installed in
CDPF have the following functions:
Front temperature sensor:
Measuring the temperature of exhaust
gas (exhaust manifold)
Rear temperature sensor:
Measuring the temperature of exhaust
gas passed through DOC
The rear temperature sensor monitors the tem-
perature of exhaust gas. If the temperature is below
600°C, the amount of post injection is increased to
increase the temperature.
Temperature Sensor
Engine ECU
The I.D and O.D of fuel rail has changed from 2.4
mm/6.0 mm to 3.0 mm/6.35 mm. Also, the damping
orifice is installed to prevent the fuel pulsation
occured by fuel pressure.
Fuel Common Rail and Fuel Rail
(Between Common Rail and Injector)
CDPF front temperature
sensor
CDPF rear temperature
sensor
Differential pressure
sensor front connecting port
Differential pressure
sensor rear connecting port
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