Geely EC718 2009 Workshop Manual page 673

Engine
9. Oil Pressure Regulator
With a non fuel return system, fuel pressure regulator is
installed in the fuel pump assembly. Hydraulic regulator
function is to regulate the fuel pressure in the fuel rail to
eliminate the fuel supply rate change, fuel pump supply change
and engine vacuum changes interfering the fuel injection.
Using the internal springs, the fuel supply system pressure will
be constant at 350 kPa. After regulation, the excessive fuel
returns back to the fuel tank through the return pipe.
10. Fuel Pump Assembly
Fuel pump assembly consists of the fuel pump, brackets, fuel
level sensor, fuel pressure regulator (non return-style design).
Its function is to provide adequate fuel pressure at the same
time to provide the driver fuel amount information on instrument
panel. The fuel pump assembly is installed inside the fuel tank.
The fuel pump is a turbine-type single-stage electric fuel pump,
controlled by ECM through the fuel pump relay. It is different
from the joint electronic control system. This control system
controls fuel pump relay power supply. The fuel pump outlet
has a one-way valve. When the engine is not running, the fuel
inside the pipeline will not quickly return to the fuel tank to
ensure the re-starting performance. Fuel level sensor is a
variable resistance type.
Fuel pump output fuel pressure is greater than 350 kPa.
Note
If the fuel pump outlet check valve leaks, the vehicle will
be difficult to start in a short period of time. Because there
is no fuel inside the pipe. It takes some time to establish
a certain degree of fuel pressure. In summer heat, if the
check valve leaks, fuel supply system does not have
residual pressure. It will produce air resistance, resulting
in difficulty in starting, or can not start.
11. Ignition Coil
Ignition coil assembly includes two sets of coils.The coils
provide ignition spark to two cylinders with 360-degree
crankshaft angle difference. Ignition occurs when one piston is
at compression TDC, the other is at exhaust TDC. The cylinder
at exhaust TDC internal air pressure is low, and the
temperature is high. Less energy will enable the ignition, known
as redundant ignition. The cylinder at compression TDC
mixture density and pressure is high, so more ignition energy
sis required for spark plug ignition. The mixture is quickly
FE02-8033b
ignited for power, this is called an effective ignition.
Ignition Coil Primary Resistance: 0.45-0.55 Ω
Ignition Coil Primary Resistance: 0.45-0.55 Ω
12. Electronic Throttle Body (ETC)
Control System JL4G15-D
EC718/EC718RV EC715/EC715RV 10/2009
2-591
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FE02-8035b