ENGINE CONTROL SYSTEM 3-16
FUEL VAPOR SEPARATOR
The fuel vapor separator incorporates a float system that maintains a constant fuel level inside the separa-
tor chamber.
As the fuel level decreases, fuel flows into the vapor separator from the low pressure fuel pump.
The function of this unit is to separate vapors from fuel delivered by the low pressure fuel pump or fuel
returned from the fuel pressure regulator.
This vapor is routed through the evaporation hose connecting the vapor separator cover to the air inlet
cover over the flywheel.
HIGH PRESSURE FUEL PUMP
The high pressure fuel pump is an “integral” type in which the pump mechanism is located within the fuel
vapor separator.
To supply the optimum fuel amount, the pump is driven by the duty cycle signal from ECM.
Fuel outlet
Evaporation
Fuel inlet
Water inlet
(For cooling Fuel)
Water outlet
Fuel drain
Fuel return
Fuel pressure
regulator
Suction
filter
High pressure
fuel pump
Float
Needle valve
Valve seat
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