Daedong 3A165D, Руководство пользователя

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ENGINE
b. Operation of Pump Element
(A) Before delivery
As the tapper lowers, the plunger(2) lowers and fuel
is drawn into the delivery chamber(1) through the
feed hole(4) from the fuel chamber(5).
(B) Beginning of delivery
When the plunger is pushed up by the cam and the
head of the plunger closes the feed hole, the
pressure in the delivery chamber rises to push the
relief plunger(2) open.
(C) Delivery
While the plunger is rising, delivery of fuel continues.
(D) End of delivery
When the plunger rises further and the control
groove(6) on its peryphery meets the feed hole, the
fuel returns to the fuel chamber from the delivery
chamber through the control groove and the feed
h o l e .
(1) Delivery Chamber
(4) Feed Hole Plunger
(2) Relief Plunger (5) Fuel Chamber
(3) Control Groove
c. Amount of fuel delivery
(A) No fuel delivery
At the engine stop position of the control rack(3), the
lengthwise slot(1) on the plunger(2) aligns with the
feed hole(5). The delivery chamber(4) is led to the
feed hole during the entire stroke of the plunger. The
pressure in the delivery chamber does not build up
and no fuel is forced to the injection nozzle.
(B) Fuel delivery
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.
(1) Slot
(4) Delivery Chamber
(2) Plunger (5) Feed Hole
(3) Control Rack (6) Control Groove