DAF CF65 Series Service Manual page 168

PE ENGINE FUEL SYSTEM
General
6
5
Situation C
In this situation, the injection timing is
determined.
The solenoid valve (4) is activated by the
electronic unit.
In this way, the valve (5) closes the link between
the space above the pump plunger (2) and the
fuel supply ducts (3).
There is now a pressure build-up above the pump
plunger (2), causing fuel to be injected via the
injector (6).
Situation D
In this situation the quantity of fuel to be injected
is determined.
The solenoid valve (4) is no longer activated by
the electronic unit
The valve (5) opens the connection between the
space above the pump plunger (2) and the fuel
supply ducts (3).
The fuel pressure above the pump plunger (2) will
be quickly reduced.
2-4
C
5
2
1
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4
3
4
CF65/75/85 series
D
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