ENGINE
EA330-E4, WSM
1-M20
[3] INJECTION NOZZLE
Since the nozzle is a throttle type, only a small
amount of fuel is injected at the initial stage of injection,
and the amount increases gradually until a full amount is
injected. As a result, combustion starts up more
smoothly with less noise. Fuel pressurized by the
injection pump pushes up needle valve (7), and as a
result, fuel is injected into the combustion chamber.
The injection pressure is adjusted to opening
pressure values in the table below.
If the pressure drops and adjustment is necessary, a
shim must be inserted between nozzle holder body (1)
and adjustment washer (2). Increases of approximately
980 kPa (10 kgf/cm
2
, 140 psi) will occur with shim
thicknesses of 0.1 mm (0.004 in.).
As these components are precision-machined like
the nozzle and pump, adequate care must be taken to
prevent entry of water or foreign matter.
9Y1211018ENM0036US0
(1) Nozzle Holder Body
(2) Adjustment Washer
(3) Nozzle Spring
(4) Push Rod
(5) Retaining Nut
(6) Nozzle Body
(7) Needle Valve
(8) Combustion Chamber
(9) Eye-tube Joint
(10) Overflow Pipe
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