Injection Control Pressure (Icp) System - International VT 365 Service Manual

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Injection Control Pressure (ICP) System

Figure 21 High-pressure oil system
1. High-pressure oil pump cover
fasteners (8)
2. Oil rail assembly (2)
3. High-pressure oil pump cover
4. Pump-to-cover seal ring
5. High-pressure oil pump cover
seal
High-pressure Oil Flow
A gear driven, high-pressure oil pump draws
oil through a screen in the oil reservoir for the
high-pressure oil pump. The oil reservoir, in the top
of the crankcase below the oil cooler, is kept full by
the engine lubrication system.
The IPR valve maintains the ICP pressure by dumping
excess oil back to the crankcase.
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
ENGINE SYSTEMS
6. High-pressure oil pump
fasteners (3)
7. Case-to-head tube assembly (2)
8. High-pressure oil pump
assembly
9. Branch tube adapter bolt (2)
10. Branch tube assembly
High-pressure oil from the pump flows through a
branch tube assembly to each case-to-head tube
assembly to each high-pressure oil rail.
High-pressure oil in the oil rails enter the fuel injectors
through sealed ports in the top of the fuel injectors.
When the OPEN coil for each injector is energized, the
injector uses high-pressure oil to inject and atomize
fuel into the combustion chamber. The CLOSE coils
are energized to end injection.
through two ports in the top of the injector and drains
back to the crankcase.
EGES295-2
Follow all warnings, cautions, and notes.
© 2006 International Truck and Engine Corporation
11. Snap to Connection (STC) fitting
12. Branch tube adapter
13. O-ring
14. IPR valve
Exhaust oil exits