Jaguar X-Type Sedan and Estate (Wagon). Service manual — part 267
Published: 11-May-2011
Fuel Charging and Controls - 2.0L Duratorq-TDCi/2.2L Duratorq-TDCi (110kW/150PS)
- Puma -
Torque Specifications
Description
Nm
lb-ft
lb-in
High-pressure fuel supply lines
40
30
-
High-pressure fuel supply line support bracket retaining nut
8
-
71
Fuel injectors
47
35
-
Fuel injection supply manifold retaining bolts
23
17
-
Fuel injection supply manifold support bracket retaining bolts
14
10
-
Fuel pump shield lower retaining bolt
33
24
-
Fuel pump shield upper retaining bolts
8
-
71
Fuel pump support bracket to fuel pump retaining bolts
33
24
-
Fuel pump support bracket to cylinder block retaining bolts
23
17
-
Fuel pump retaining bolts
22
16
-
Fuel pump sprocket retaining bolts
32
24
-
Fuel supply line to fuel pump union retaining nut
20
15
-
Exhaust gas recirculation (EGR) valve retaining bolts
10
-
89
Intake manifold retaining bolts
15
11
-
Fuel return line venturi retaining bolt
6
-
53
Published: 11-May-2011
Fuel Charging and Controls - 2.0L Duratorq-TDCi/2.2L Duratorq-TDCi (110kW/150PS)
- Puma - Fuel Charging and Controls
Description and Operation
High Pressure Fuel Injection Components
Item
Part Number
Description
1
-
Fuel injection supply manifold support bracket
2
-
Fuel injection supply manifold
3
-
High-pressure fuel supply lines (fuel injection supply manifold to fuel injectors)
4
-
Fuel injection supply manifold support bracket
5
-
Fuel injector
6
-
Fuel injector sealing washer
7
-
High-pressure fuel supply line (fuel pump to fuel injection supply manifold)
8
-
Fuel pump
Fuel Pump
Item
Part Number
Description
1
-
Fuel pump retaining bolt
2
-
Fuel pump gasket
3
-
Fuel pump fuel return line
4
-
Fuel pump fuel supply line
5
-
Fuel pump
6
-
Fuel pump shield
7
-
Fuel return line venturi
8
-
Fuel pump sprocket retaining bolt
9
-
Fuel pump sprocket
Fuel Injectors
The fuel injectors are operated electrically by the engine control module (ECM) and inject a precise amount of fuel into the combustion
chamber at the required time.
The injectors have been designed to:
allow pilot and main injections with short intervals between each injection.
be fully electrically controlled.
Each injector is calibrated and given its own unique identification number at manufacture. The identification number is a set of letters and
numbers located near to the top of the injector.
CAUTION: If any of the high pressure fuel pipe retaining nuts are loosened, the high pressure fuel pipe it is installed to must be
renewed. Failure to follow this instruction may allow metal fragments to enter the fuel system and result in damage to the fuel system
components.
When the injectors are fitted to an engine, the injector identification number and the cylinder number to which it is installed must be
programmed into the ECM. This gives the ECM a base calibration for each cylinder of the engine, as the vehicle is run the ECM will adapt
from this calibration. If any of the injectors are replaced the ECM will have to be reprogrammed with all of the injector identification
numbers and cylinder number to which each is fitted.
Fuel Injection Supply Manifold
The fuel injection supply manifold is a reservoir for the pressurized fuel that is produced by the fuel pump. It also incorporates a pressure
sensor so that the ECM can monitor/adjust the pressure of the fuel to be injected into the cylinder. The fuel injection supply manifold and
the pressure sensor are serviced as an assembly and must not under any circumstance be disassembled.
Fuel Pump
The fuel pump is located under the intake manifold and is driven by the timing chain at the front of the engine. The fuel pump includes a
transfer pump and a high pressure pump which are serviced as one unit.
The transfer pump draws the fuel from the fuel tank and through the fuel filter, it then pumps the fuel to the high pressure pump. The
transfer pump maintains a constant pressure of 6 bar (87.02 lb/in²) via a regulating valve within the fuel pump, this is known as transfer
pressure.
The high pressure pump receives fuel at transfer pressure from the transfer pump and increases the fuel pressure to between 200 and 1600
bar. The high pressure fuel is then transferred from the high pressure pump to the fuel injection supply manifold.
Fuel Return Line Venturi
The fuel return system incorporates a fuel return line venturi, installed to the back of the fuel pump. The fuel return line venturi is a partial
restriction in the fuel return line, which creates a negative pressure in the fuel return system prior to its position in the system. The
negative pressure created by the fuel return line venturi helps in the removal and the return to the fuel tank of the fuel leaked off by the
fuel injectors.
Fuel Filter
The fuel filter is located at the top of the bulkhead on the right-hand side of the vehicle. The fuel filter incorporates a fuel pre heat
function, which utilizes a ball valve operated by a bimetallic strip. When the temperature is less than 15° C (59° F), the ball valve allows
the warm fuel in the fuel return system to pass back through the fuel filter to the fuel pump to improve cold running. Once the temperature
exceeds 31° C (88° F) a bimetallic strip closes the ball valve in the fuel filter and all of the fuel in the fuel return system is directed back to
the fuel tank.
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