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Home >> Ford >> 2021 >> Edge ST-Line, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 14 (Engine Controls - Description & Operation (Diesel)) >> Engine Control Components >> Fuel Injectors >> Control Piston
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Control Piston

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The control piston uses its large surface area on top as a downward force to overcome an upward force created by the smaller surface area in the high pressure chamber. The control piston also keeps the nozzle needle in the closed position when the piezo actuator is not energized.

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