6C-4 ENGINE FUEL AND EMISSION CONTROL SYSTEM
FUEL SYSTEM
(common rail ENGINE)(common rail ENGINE)
(common rail ENGINE)(common rail ENGINE)
(common rail ENGINE)
The fuel system for vehicles with common rail engines is made
up of the following elements:
• A fuel tank.
• A prefilter positioned between the tank and the electric
feed pump.
• An electric feed pump which moves the fuel from the tank to the
high pressure fuel pump.
• A fuel filter which also incorporates a fuel pre-heater, a fuel
temperature sensor, a fuel heater control, an obstructed filter
sensor and a sensor detecting water in fuel.
• A high pressure fuel pump, capable of supplying fuel to the
electro-injectors at a maximum pressure of 1350 kg.
• A hydraulic accumulator (rail) which also incorporates four
flow limitation valves, one pressure limitation valve and a
pressure sensor.
• Four fuel electro-injectors.
• An electro-valve which controls the rate of fuel to the thermo-
starter in the pre/post heating of air admitted when the
coolant temperature, air admitted or fuel is below 0ºC.
• A thermostarter spark pug attached at the intake manifold
which carries out pre/post heating when the ignition is on
and the coolant temperature is below 0ºC.
FUEL SYSTEM DIAGRAMA
(common rail engine)
1. Fuel tank.
2. Fuel prefilter.
3. Feed pump.
4. Fuel filter, fuel heater, obstructed fuel sensor, fuel
temperature sensor and heater control, water in
fuel sensor.
5. High pressure fuel pump.
6. Hydraulic accumulator (rail), flow limitation valves,
fuel pressure limitation valve, fuel pressure sensor.
7. Electro-injectors.
8. Thermostarter electro-valve.
9. Thermostarter spark plug.
10. Multiple return collector (5-way).
Fuel feed
Fuel return
High pressure of fuel
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