Suzuki Liana RH413, Service Manual

Page: 286 / 1302

1G-2 Fuel System:
General Description
Fuel System Description
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CAUTION
!
The engine of this vehicle requires the use of
unleaded fuel only.
Use of leaded and/or low lead fuel can result
in engine damage and reduce the
effectiveness of the emission control system.
The main components of the fuel system are fuel tank,
fuel pump assembly (with fuel filter, fuel level gauge and
tank pressure control valve), fuel / vapor separator fuel
feed line and fuel vapor line.
For the details of fuel flow and fuel vapor flow, refer to
“Fuel Delivery System Diagram”.
Fuel Delivery System Description
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The fuel delivery system consists of the fuel tank, fuel
pump (with built-in fuel filter), fuel pressure regulator,
delivery pipe and fuel injectors.
The fuel in the fuel tank is pumped up by the fuel pump,
filtered by the fuel filter and fed under pressure to each
injector through the delivery pipe. As the fuel pressure
applied to the injector (the fuel pressure in the fuel feed
line) is always kept a certain amount higher than the
pressure in the intake manifold by the fuel pressure
regulator, the fuel is injected into the intake port of the
cylinder head when the injector opens according to the
injection signal from ECM.
The fuel relieved by the fuel pressure regulator returns
through the fuel return line to the fuel tank.
For system diagram, refer to “Fuel Delivery System
Diagram”.
Fuel Pump Description
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An in-tank type electric pump has been adopted for the
fuel pump (1). Incorporated in the pump assembly are;
• Tank pressure control valve (2) which keeps the
pressure in the fuel tank constant, and prevents the
fuel from spouting and tank itself from being
deformed.
• Relief valve (3) which prevents the pressure in tank
from rising excessively.
• Fuel cut valve (4) which closes as the float rises so
that the fuel will not enter the canister when the fuel
level in the tank rises high depending on the fuel level
in the tank and the vehicle tilt angle.
Also, a fuel filter (5) is included and a fuel level gauge (6)
is attached.
I2RH0B170001-01