Piezo Electric Fuel Injector; Injector & O-Ring; Piezo Actuator - Ford 6.4L Power Stroke Manual

Piezo Electric Fuel Injector

• Piezo Electrically Actuated
• High Electrical Effeciency
• High Voltage Supply
• Up to 5 Injections Per Combustion Event
• Self extracting hold down clamp

Piezo Actuator

Fuel Inlet
From High
Pressure Fuel Rail
Fuel Return Line
Drain Holes
Soft Steel
Combustion Gasket
Piezo Actuator
(non-energized)
F uel M a na ge Me nt Sy Ste M
Electrical
Connector
O-Ring
Piezo Actuator
(energized)
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Fuel Injector Features
• The injector uses a Piezo Actuator to electrically
control the injections with extreme precision.
• The Piezo Actuator is turned on for approximately 0-400
µs (micro second or millionth of a second) for 2 injections.
• No special tools are needed to remove the injectors from
their bore. The injector is slowly removed from its bore
by removing the self-extracting hold down clamp bolt.
Injector & O-ring
• The injector has one (1) replaceable o-ring on the
outside of the body, and one (1) replaceable soft
steel combustion gasket on the tip of the injector.
• The injector's piezo actuator has a single two (2) pin
connector that is located under the valve cover.
• The fuel charging harness has a single main connection
point at the front of the valve cover spacer.
Piezo Actuator
• The piezo actuator is an electrically energized device that
acts similar to a solenoid but is much more precise.
• A piezo actuator is a composition of piezo discs, that
when electrically energized, cause the discs to deform
resulting in an expansion. This expansion results in
a longitudinal motion thus controlling the injector.
• When energized, the piezo actuator pushes downward
against the valve piston. The piezo actuator is returned
to its non energized state via the ECM switching
the polarity of the electrical feed to the injector.
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