Operation of the Injection Actuation Pressure Control Valve

TM 9-2320-312-24-2

Systems Operation Section

Operation of the Injection Actuation

Pressure Control Valve

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Illustration 11

Injection actuation pressure control valve

(9) Poppet

(5) Armature

(1)

Drain port

(10) Push pin

(6) Valve spool

(2)

Valve body

(11) Solenoid

(7) Spool spring

(3)

Control orifice

(8) Reduced pressure oil

(4)

Spool chamber

Push pin (10)

The IAP Control Valve is an electrically controlled

pilot operated pressure control valve. The Injection

Actuation Pressure Control Valve is used in order to

maintain selected actuation system pressure. The

selected actuation system pressure is maintained

The IAP Control Valve operates by using a

regardless of engine speed, pump flow, and

variable electrical current from the ECM in order

variable oil demand of the unit injectors. The IAP

to create a magnetic field in the solenoid (11).

Control Valve consists of six basic components:

This magnetic field acts on armature (5) and the

magnetic field generates a mechanical force. This

Armature (5)

mechanical force pushes armature (5) to the left.

The mechanical force travels through push pin (10)

Valve spool (6)

to poppet (9).

Spool spring (7)

Poppet (9)