Suzuki DF 60 - Fuel Delivery System Components

3-16 ENGINE CONTROL SYSTEM
Fuel tank
Primer bulb
High pressure
fuel filter
High
pressure
fuel
pump
Fuel
vapor
separator
Delivery pipe
Fuel
injector
Breather
hose
Exhaust
manifold
Intake
manifold
IAC
valve
Throttle
body
Silencer
Silencer cover
Fuel pressure regulator
Evaporation hose
Low pressure
fuel filter
Low pressure
fuel pump
FUEL DELIVERY SYSTEM COMPONENTS
The fuel delivery system is composed of the low pressure line components (fuel tank, filter, pump etc.), fuel
vapor separator, high pressure fuel pump, high pressure fuel filter, fuel pressure regulator (located in the fuel
vapor separator), delivery pipe, fuel injector and hoses.
Fuel is supplied through the primer bulb, low pressure fuel filter, and low pressure pump to the fuel vapor
separator.
Fuel flow from the fuel vapor separator is pressurized by the high pressure fuel pump and supplied through
the high pressure fuel filter and fuel delivery pipe to the fuel injectors.
The pressure regulator maintains fuel pressure in the feed line between the high pressure fuel pump and fuel
injector.
This pressure, maintained at a constant level, is higher than the pressure in the vapor separator chamber.
When the fuel feed line pressure exceeds the vapor separator chamber pressure by more than approx. 255
kPa (2.55 kg/cm
2
, 36.3 psi), the valve in the fuel pressure regulator will open and return the excess fuel to the
vapor separator chamber.
Pressurized fuel enters into the intake ports through the fuel injector based on the sequential signals sup-
plied from the ECM.