Precision and Speed Converge Piezoelectric Injectors Outperform Electromagnetic Actuators

While direct actuator's stroke is generally lower than 100 μm, amplified piezo actuators can reach millimeter strokes. ... piezoelectric fuel injectors ... Piezo actuators (not to be confused with piezo motors) provide motion output proportional to a drive voltage – usually up to one millimeter and high dynamics ... Frequencies in the kilohertz range are desirable and piezo actuators provide faster response than electromagnetic drives, such as solenoids or voice coils. The ... According to Bosch, which introduced piezo injectors to the industry, a piezo actuator acts up to five times faster than a standard injector solenoid and ... It seems that several companies including Siemens already has piezo injectors that can inject at more than 400 bar over what the 6.4 is going to do. ... injector length. As the piezo actuator is integrated in the housing, the injectors are significantly slimmer than solenoid valve injectors and thus require ... The method of testing then is to measure the resistance of the injector at 100v. ... injectors have solenoid actuators and not piezo actuators. The piezo actuators respond more precisely and repeatably providing more accurate fuel flow control. The first generation of piezo injectors ... According to Bosch (who brought Piezo injectors to market) a Piezo actuator can act up to 5 times faster than a standard injector solenoid, and ... Piezoelectric stack actuators are particularly useful because they can generate large forces, but the displacement is almost linear depending on ...