International VT 275 V6, Руководство пользователя

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Injector Sealing
• The injector has two replaceable O-rings
on the outside of the body. These O-rings
seal the fuel inlet area. In addition, the
injector has a copper gasket where the
nozzle passes through the cylinder head
into the combustion chamber.
• The oil inlet o-ring is contained in the top of
the injector. This o-ring can not be replaced.
• The injector has two coils with a single 4
pin pigtail lead that connects to the valve
cover gasket pass-though connecter pigtail.
INJECTOR OPERATION
59
International ® VT 275 V6 Engine
O O--R RIIN NG GS S
O O--R RIIN NG GS S
N NO OZZZZLLEE
N NO OZZZZLLEE
G GAAS SK KEETT
G GAAS SK KEETT
Oil Pressure
Fuel Pressure
High Pressure Oil
Atmosphereic Pressure
Fuel Supply Pressure
Above 3100 PSI
End of injection
• When the injector drive module
determines that the correct amount of fuel
has been delivered, it sends a current to
the close-coil of the injector. The spool
valve closes, and high pressure oil flow
into the injector stops.
• Oil above the intensifier piston flows past
the spool valve through the exhaust ports
out into the valve cover area. The intensifier
piston and plunger return under spring
pressure to the fill position.
• Fuel pressure under the plunger
decreases until the nozzle needle control
spring forces the needle back onto its seat
and injection stops.
O OIILL IIN NLLEETT
O OIILL IIN NLLEETT
C CO ON NN NEEC CTTO OR R O O--R RIIN NG G
C CO ON NN NEEC CTTO OR R O O--R RIIN NG G