105
——Working procedure of Fuel pressure regulator.
Spring (2) applies pressure on the diaphragm (7) connected to sealing valve (6) keeping cavum closed
between fuel delivery pipe and fuel return pipe (4).
When fuel pressure in pipe (3) exceeds 1 bar, pressure on diaphragm (7) will overcome spring (2)
resistance, then diaphragm goes up raising sealing valve up to allow redundant fuel to flow back and
returns to proper work pressure.
During producing, fuel pressure regulator pressure is calibrated by socket head bolt and will never
changed under any circumstance. ——Fuel injector
1.
Socket head regulator screw
5. Spring
2.
Spring
6. Sealing valve
3.
Fuel output pipe
7. Diaphragm
4.
Fuel return pipe
Fig.163
IWM523 fuel injector applied in the system is of the shortened type of the first generation. It is entirely
made of stainless steel and superior in the function. The advantage may be embodied when the commercial
fuel containing corrosive material is applied. figure 164 shows fuel injector structure and some technical
parameters.
Technical parameters:
－
winding resistance R=1.8
Ω
+/-10%(20
℃
)
－
power supply voltage V=6-
16V
－
spraying shape angle 30
～
90
°－
operating temperature -30
～
+110
℃
.
