Speed Demon Piezoelectric Injectors Blazing Past Electromagnetic Actuators

Piezoelectric transducers and actuators are uniquely able to combine speed, force and precise motion into a compact package. The maximum expansion of the Siemens actuator is 40 µm. The control on the injector is quicker allowing more precision in the fuel injected volume, and a. The ECU then controls various output actuators like fuel injectors. ... • 5 times faster than conventional injectors. 7. Emission Control ... use in diesel fuel injectors. Sept 2009 – Milestone: Measure and compare piezoelectric and mechanical reliabilities of tape- cast and hot ... Piezoelectric stack actuators are particularly useful because they can generate large forces, but the displacement is almost linear depending on ... Since the piezo actuator is integrated into the injector body, piezo injectors are slim and need less installa- tion space than solenoid injectors. Possible ... Hence, unlike the electromagnetic actuators which produce forces from a distance onto a mechanical load, piezoelectric actuators exploit the strains and ... While direct actuator's stroke is generally lower than 100 μm, amplified piezo actuators can reach millimeter strokes. ... piezoelectric fuel injectors ... The high precision of individual actuators makes them the most sus- ceptible to damage components of common rail systems in difficult operating ... I think they are getting better. We used them maybe 4 years ago. So the new technology may be better.