ActuatorsPeizoelectric ActuatorsA piezo electric actuator performs the same job as a solenoid; however, it accomplishes its task in a totallydifferent manner. Instead of using an electromagnetic field to move the core of a solenoid, an electriccharge is applied to a piezoelectric element. This causes slight, controllable, rapid changes in the geometryof the element (it expands) that can be used to mechanically move an object like a fuel injector needle. Intheory piezo injectors are smaller and faster than their solenoid equivalents. The Piezo element that is
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