LR3/Disco 3
appropriate piezo actuated injector.
The common rail fuel injection system has the following features:
High fuel injection pressures of up to 1650 bar for greater atomisation of fuel (increasing performance and
lowering emissions)
Variable injection to optimise combustion in all engine operating conditions
Low tolerances and high precision throughout the life of the system
The fuel system is divided into 2 sub systems:
Low-Pressure (LP) system
HP system.
The LP system features the following components:
In-tank fuel pump
Fuel pressure regulator (integral to the fuel delivery module)
Fuel filter
Return pipes and fuel cooler
Injector return pipes
Fuel coolers (engine and vehicle)
The LP system pressure is regulated to 0.5 bar.
The HP system features the following components:
HPP
Common rails and diverter rail
HP fuel pipes
Injectors.
LP SYSTEM
In-tank Fuel Pump
The electric fuel pump is located inside the fuel tank. Fuel is pumped from the tank via the in-tank fuel pump, to the HPP
via the fuel filter. For additional information, refer to
Fuel Tank and Lines
(310-01C Fuel Tank and Lines - 2.7L Diesel)
Fuel Filter
The fuel filter is located in the engine compartment on the left hand side, packaged to be protected against damage.
Incorporated in the fuel filter housing is a bimetallic temperature valve, which will start to close at 30°C (86°F) and will fully
close at 50°C (122°F). This allows pre-heated diesel fuel to circulate inside the fuel filter to prevent waxing in cold
operating conditions.
Fuel Cooler
Two fuel coolers are fitted to the vehicle. One is located in the 'vee' of the engine block, and has a coolant system
connection to aid heat transfer. The second cooler is located in the fuel return line and is a fuel to air cooler. For additional
information, refer to
Fuel Tank and Lines
(310-01C Fuel Tank and Lines - 2.7L Diesel)
HP SYSTEM
HPP