SsangYong: Engine Euro 4. 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