International VT 275 V6, Руководство пользователя

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System Operation
• The high-pressure oil system is
composed of the reservoir, high-
pressure pump, injection pressure
regulator, rear branch tube, case-to-
head tubes, high-pressure rails and
the injection control pressure sensor.
• The crankshaft driven lube oil pump
supplies the reservoir. The reservoir
stores the oil under low-pressure to
supply the high-pressure pump. The
Vee-configured, four-piston high-
pressure pump is mounted at the
rear of the crankcase Vee and is
driven off the rear gear train. The
pump is a positive displacement
pump capable of high-pressures.
Oil discharged by the pump enters
the rear branch tube. The branch
tube serves to transfer the oil to the
case-to-head tubes.
• The high-pressure rails are mounted
above the injectors. Oil from the
pump enters each rail through a
case-to-head tube and a check
valve built into the port plug. Oil
from the rail can then enter the top
of the injector.
• As each injector spool valve opens,
oil pushes the intensifier piston
down, pressurizing the fuel below
the plunger. Fuel pressure acts on
the bevel of the nozzle needle.
When the force on the needle
exceeds the Valve Opening-Spring
Pressure (VOP) the needle lifts and
forces fuel into the combustion chamber.
• When the spool valve closes,
pressure pushing on the intensifier
piston is vented. With pressure on
the plunger relieved, injection stops
and low-pressure fuel from the fuel
supply system refills the barrel and
plunger area of the injector.
• The ICP sensor allows the ECM to
monitor the injection control
pressure. The ECM commands the
injection pressure regulator to vary
the pressure according to
operating conditions.
ECT
ECM
FUEL MANAGEMENT SYSTEM
CKP
IDM
High-pressure oil
Fuel
Electronic circuit
Lube oil pressure
BAP
EOPS
MAP
ICP
EGR DRIVE
MODULE
MAF / IAT
EOT
MAT
APS / IVS
CMP
INJECTION CONTROL
PRESSURE (ICP)
SYSTEM
LUBRICATION
SYSTEM
FUEL SUPPLY
SYSTEM
FUEL MANAGEMENT SYSTEM
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International ® VT 275 V6 Engine