SSANGYONG NEW REXTON 2012 Service Manual

1212-01

4. TIGHTENING TORQUE

1212-01

1881-09
MAJOR CHANGES IN FUEL SYSTEM OF D27DTP (POWER
UP) ENGINE 1.
There are some changes in the parts related to the fuel system due to the newly adopted
D27DTP (POWER UP) engine. The major changes are as follows. Refer to the next pages for
further details.
1) Injector
Two nozzle holes are added (currently 7)
to the tip of the injector to increase the
amount of fuel injection and to improve
injection efficiency according to the
increased engine power.
The existing C2I coding (16 digits) is
changed to C3I coding (20 digits) to
monitor fuel injection and follow the target
value.
For the D27DT engine, the injector MD
P
(minumum current for the solenoid in the
injector to lift the nozzle) is leaned only
when the engine is running. However, for
the D27DTP engine, it is learned when the
vehicle is in motion and the engine is at
idle speed.
D27DTP & D27DT (EU IV)
D27DT

2) Common Rail
The orifice is added to the connection to
the fuel pipe of the HP pump to prevent
the fuel pulsation by the fuel supply and
fuel cut according to the increase of
injected fuel volume. (It is also installed on
the connection of the high pressure fuel
supply line of the HP pump.)D27DTP & D27DT (EU IV)
D27DT

1881-09
3) Fuel Rail - Chrome Color
D27DTP & D27DT (EU IV)
Common rail)
D27DT
Common rail)The I.D and O.D of the fuel rail between
HP pump and common rail are increased
according to the increased amount of fuel
injection.
Also, the engine ECU, HFM sensor and
EGR system are changed to control the
fuel injection volume and engine more
precisely.

2. COMPONENTS OF FUEL SYSTEM

1881-09
Fuel Supply System

2321-01
1. INTAKE SYSTEM LAYOUT
The intake system for the D27DTP (POWER UP) engine is equipped with the throttle body that has
a flap to block the air coming to the engine when the engine is switched off. Therefore, the
structure of the intake manifold has been changed.
Also, the improved HFM sensor (from HFM5.0 to HFM6.0) has been installed to control the intake
air precisely so that the NOx in the exhaust gas can be decreased.