Fuel Delivery System Components - Suzuki DF 60 Service Manual

3-16 ENGINE CONTROL SYSTEM

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.
Fuel tank
Exhaust
manifold
Primer bulb
High
High pressure
pressure
fuel filter
fuel
pump
Breather
hose
Fuel
injector
Delivery pipe
Intake
manifold
Fuel
vapor
separator
Fuel pressure regulator
IAC
valve
Throttle
body
Silencer
Low pressure
fuel filter
Low pressure
fuel pump
Evaporation hose
Silencer cover