Ezgo 1600xd Repair Manual page 63

C. AMOUNT OF FUEL DELIVERY
2
3
(1) Slot
(2) Plunger
(3) Control rack
a. No fuel delivery
When the control rack (3) is at the engine stop position,
the lengthwise slot (1) on the plunger (2) aligns with the
feed hole (5). The pressure in the delivery chamber does
not build up and no fuel is forced to the injection nozzle
since the delivery chamber (4) is opened to the feed hole
during the entire stroke of the plunger.
b. Fuel delivery
Location of fuel
supply hole
Stop
The plunger is rotated by the control rack and the feed
hole is not aligned with the lengthwise slot. When the
plunger is pushed up, the feed hole is closed by the
plunger. The pressure in the delivery chamber builds up
and forces the fuel to the injection nozzle until the control
groove (6) meets the feed hole. The amount of the fuel
to be forced into the nozzle corresponds to distance A. In
the above fi gure, the amount of injected fuel in (c) is larger
than the amount of injected fuel in (b).
SUUV-W00 Apr. 2011
ENGINE - STRUCTURE AND FUNCTION
1
4
5
6
T46W239A
(4) Delivery chamber
(5) Feed hole
(6) Control groove
Low speed High speed
T46W240A
D. DELIVERY VALVE
1
2
6
5
3
(1) Valve spring
(2) Delivery valve
(3) Valve seal
The delivery valve (2) prevents the fuel in the injection
pipe from fl owing back into the delivery chamber and the
fuel in the injection nozzle from dribbling after injection.
The relief plunger (6) sucks the fuel back from the injection
pipe to prevent the leakage dribbling and unnecessary
subsequent injection after the major injection.
The stroke of A corresponds to the amount of fuel sucked
3
back (35 mm
).
3
4
T46W241A
(4) Fuel chamber
(5) Valve face
(6) Relief plunger
3
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