SsangYong: Engine Euro 4. Service manual — part 13
CHANGED BY
EFFECTIVE DATE
AFFECTED VIN
3
1881
FUEL SUPPLY 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. COMPONENTS OF FUEL SYSTEM
HP Pump
Fuel return port
Low pressure
fuel supply port
V
enturi
IMV
connector
Fuel return
port
Fuel tempera-
ture sensor
IMV valve
High pressure
fuel supply port
(orifice included)
Injector (7-way
In
jection and C3I Coding)
Fuel
nozzle
holes (7)
C3I
Fuel filter Priming Pump
Priming
pump
Connector
Fuel filter
Fuel
tank
Fuel tank
Fuel from
HP pump
HP pump
Fuel filter
Fuel
S
upply R
ail (Increase in I.D)
Injector
Fuel pipe
Commom rail
High pres-
sure fuel pipe
Fuel rail pressure
sensor
Common
Rail (Orifice for
P
reventing
Fuel
Pulsation Added)
Orifice
* Orifice for HP pump fuel outlet
CHANGED BY
EFFECTIVE DATE
AFFECTED VIN
4
1881
FUEL SUPPLY SYSTEM
D27DTP/D27DT (EU4) SM - 2006.08
D27DTP/D27DT (EU4)
Fuel Flow of D27DTP (Power Up) Engine
: Supply line
: Return line
: ECU communication line
Fuel Supply System
High pressure
pump
Common rail
Fuel pipe
Injector
Fuel filter
Priming
pump
Fuel tank
ECU (Ver. 3.2)
IMV valve
Low and high
pressure pump
Fuel temperature
sensor
Water separator
Water detection
sensor
Sensors
HFM sensor
Cam position sensor
Crank position sensor
Knock sensor etc.
Fuel rail pres-
sure sensor
C3I
Nozzle hole: 7 EA
Tip diameter: 4.4 mm
Orifice for preventing
fuel pulsation
CHANGED BY
EFFECTIVE DATE
AFFECTED VIN
5
1881
FUEL SUPPLY 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
INJECTOR
1. STRUCTURE AND OVERVIEW
Injection
nozzle
C3I
label
The injector for the D27DTP (POWER UP) engine is different from the injector for the
D27DT engine. Also, the injectors for each engine are not compatible with each other.
The amount of fuel injection is increased according to the increased engine power and
the number of nozzle holes on tip are increased (from 5 to 7).
Also, the C2I label is replaced to C3I label for the better control of the fuel injection volume.
With C3I coding, the MDP learning is performed when the vehicle is in motion and the
engine is at idle speed.
Major changes in injector are as follows:
Specifications (for D27DTP and D27DT)
Description
Number of Nozzles (holes)
MDP Learning
D27DT
5
while
driving
D27DTP
7
while driving or
engine idling
Remark
-
-
Mounting Angle
Injection Nozzle and Injection Angle of Injector for D27DTP Engine
Injector
Fuel high
pressure pipe
Fuel filter
Fuel pressure
sensor
Fuel pipe
Injector
Injector
holder
Injector’s
central
line
Central
line
Cylinder
head
Tolerance
when
installed
(approx. 1°)
Common rail
46.3°
97.7°
149.1°
200.6°
252°
303.4°
354.9°
CHANGED BY
EFFECTIVE DATE
AFFECTED VIN
6
1881
FUEL SUPPLY SYSTEM
D27DTP/D27DT (EU4) SM - 2006.08
D27DTP/D27DT (EU4)
C3I value
(20 digits)
Injector label (C3I)
The injector label is changed from 16 digits to 20 alphanumeric digits (C3I) as the D27DTP (POWER UP)
engine has been adopted for controlling the fuel injection volume precisely and for better identification.
Comparison Between C3I and C2I
Injector C3I Label for D27DTP (Power Up) Engine
Fuel Injection and Closeness to Target Value (Controllability) of C2I and C3I
When C2I is not applied
C2I
C3I
If the injector C2I coding is overridden,
the engine ECU controls the amount of
injected fuel which is not close enough
to the target value.
The amount of injected fuel is close
to the target value which is better than
the case of C2I coding overridden.
The closeness to the target value
is superb so that the volume is pre-
cisely controlled (decrease in ir-
regular injection in each injector).
Injector C2I Label for D27DT Engine
C2I value
(16 digits)
Injection volume
Target value
Injector
Drive pulse
Injection volume
Target value
Injector
Drive pulse
Injection volume
Target value
Injector
Drive pulse
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