Chapter VI Fuel System
Great Wall Baoding Internal Combustion Engine
Manufacturing Company Limited
391
Fig. 6-1-19 CRI2.0 fuel injector assembly (of
BOSCH common rail system)
Fig. 6-1-20 JCRT3 fuel injector assembly (of
XINFENG common-rail system)
Fig. 6-1-21 Installing the fuel injector
assembly
the course of injection may be minimized.
Structure of DFI1.5 Fuel Injector:
The inner part of fuel injector casing contains a fuel inlet
hole and a fuel return hole.
The nozzle part contains a needle valve and a fuel
injection hole.
A complete set of coil components are contained in the
fuel injector.
Control valve components
Transition plate (the apertures for needle valve control
are available in the control chamber)
Lock nuts
2.5.2 CRI2.0 Fuel Injector
The GW4D20B turbocharged diesel engine having a
BOSCH common-rail system is equipped with a CRI2.0
fuel injector. See Fig. 6-1-19.
2.5.3 JCRT3 Fuel Injector
The GW4D20B turbocharged diesel engine having a
XINFENG common-rail system is equipped with a
JCRT3 fuel injector. See Fig. 6-1-20.
2.5.4 Precautions for Using Fuel Injector
(1) The fuel nozzle gasket and O-ring are easy to wear
and shall not be reused.
(2) The fuel injector is a precise device and shall not be
knocked. Magnetic and antimagnetic devices shall be
kept away from the fuel injector when it is working.
(3) The fuel injector is electrically driven and can not be
shocked by water.
(4) Do not dismantle the faulty fuel injector without
permission. Instead, you should and get in contact with
the maintenance department promptly.
(5) Take dust prevention measures to avoid the
possible blockage in the fuel injector when installing or
removing it.
(6) The I3C code of the fuel injector must be written into
ECU after the fuel injector has been replaced.
2.5.5 Installing the Fuel Injector Assembly
(1) Tighten the support bolts of fuel injector ballast to
cylinder cover by the required torques.
Tightening torques for the support bolts of fuel
injector ballast:
23 N•m ± 3 N•m
(2) Fit a copper pad and a O-ring to the fuel injector.
Make sure that there is only one copper pad on each
single fuel injector and the pad is levelly placed.
(3) Insert the fuel injectors 1, 2, 3 and 4 respectively
into the corresponding holes (on the cylinder cover)
marked with 1, 2, 3 and 4. See Fig. 6-1-21.
Fuel nozzle
Needle valve
control chamber
Return spring
Pivot disc
Drain hole
Coil
Fuel return
pipe
Fuel return
pipe
Ball
valve
Control piston
High pressure
connection
Fuel nozzle
bearing pin
Fuel pipe
connector
Copper pad of
Fuelballast injector
Fuel return bolt
O-ring installation
position
Section view of
cylinder cover
