Fuel Tank; Fuel Level Sensor; Fuel Rail; Fuel Pump - Geely EC718 2009 Workshop Manual

Engine
2.3.2 Description and Operation
2.3.2.1 Description and Operation
The fuel supply system provides a suitable amount of fuel to
the engine in a variety of operating conditions. The fuel is
sprayed into the engine through the fuel injectors. Fuel tank
stores fuel. An electric fuel pump is installed in the fuel tank and
it will pump fuel into the fuel rail assembly. Fuel pump provided
fuel pressure exceeds the pressure needed by fuel injectors.
Fuel pressure regulator is part of the fuel pump assembly,
which keeps fuel supplied to the fuel injectors is under specified
pressure. This vehicle fuel system has no fuel return system.

1. Fuel Tank

Fuel tank is made from high-density polypropylene vinyl and
other materials. The fuel tank is tightened by the two connected
metal support brackets at the underbody. and it has a fuel vapor
ventilation valve with roll-over protection function.
2. Fuel Tank Filling Cap
Note
In the need for replacing the fuel tank filler cap, use a fuel
tank filler cap with the same function as the original one.
If the fuel tank filler cap is not correctly installed, it could
cause serious fuel system faults.
The fuel tank filling tube filler cover is equipped with a screw
thread structure, which allows air coming in once it is turned
loose. It uses the structure of the ratchet in order to prevent
over-tightening. Ventilation function means the fuel tank
internal pressure can be released before remove the cap from
the vehicle. Instructions are attached to the cap. The filler cap
also integrates a security vacuum pressure limiting valve.

3. Fuel Pump

Electric fuel pump is a modular fuel turbo pump located inside
the fuel tank. Electric fuel pump is controlled by the engine
control module (ECM) through the fuel pump relay. Electric fuel
pump will start providing fuel 2s in advance to ensure that the
fuel pressure achieve the requirements of the normal system
operation. The fuel pump resistance range is 0.2-3.0 Ω. This
model comes with electric fuel pump fuel storage in order to
prevent the fuel level too low or provide fuel supply in harsh
operating conditions.

4. Fuel Pressure Regulator

Fuel pressure regulator is integrated in the fuel pump
assembly. Fuel pressure regulator main function is to regulate
Fuel System JL4G18-D
the fuel pipe fuel flow and to control the fuel injectors pressure.
When the ignition switch is at ON position and the engine is
shut down, the system fuel pressure should be about 400 kPa.
5. Electric Fuel Pump Filter
As a coarse filter, the filter has the following features:
– Filters the pollutants.
– Improves the electric pump service life.
If the pump output pressure is found too low, clean or replace
the filter.
6. Fuel Filter Assembly
Fuel Filter Assembly is located in front of the rear suspension,
fixed on the vehicle chassis. Filter consists of a paper filter. It
can filter out the particles that may damage the fuel system.
Fuel filter can withstand maximum fuel system pressure,
temperature changes and fuel additive effect.

7. Fuel Level Sensor

Fuel level sensor consists of a fuel level float, a wire arm
harness assembly, engineering plastics, a variable resistance
chip assembly and detachable nylon sliding chip. Variable
resistance plastic film is connected to the retained to the fuel
tank plastic bracket. The fork with a brush metal contact is
connected to the detachable nylon sliding chip. According to
the location, the sliding chip provides variable resistance to the
instrument cluster circuit. The resistance range is 40-300 Ω.
Circuit wiring harness leads from the variable resistance film
and extends to and fuel pump harness connector.

8. Fuel Rail

Fuel rail consists of the following:
– Fuel Delivery Pipes To Each Fuel Injector
–
4 Independent Fuel Injectors
Fuel rail is installed in the intake manifold, and provides fuel to
each cylinder through the respective fuel injectors.
EC718/EC718RV EC715/EC715RV 10/2009
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