Igniting Innovation Piezoelectric Injectors Outpace Electromagnetic Actuators

I think they are getting better. We used them maybe 4 years ago. So the new technology may be better. While direct actuator's stroke is generally lower than 100 μm, amplified piezo actuators can reach millimeter strokes. ... piezoelectric fuel injectors ... Hence, unlike the electromagnetic actuators which produce forces from a distance onto a mechanical load, piezoelectric actuators exploit the strains and ... 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 ... ... injector length. As the piezo actuator is integrated in the housing, the injectors are significantly slimmer than solenoid valve injectors ... Piezoelectric actuators are increasingly used in fuel injectors due to their quick response, high efficiency, accuracy, and excellent ... a high voltage to open the injector; · The first injection event is called the Pilot Injection, during which time, a small amount of fuel is delivered to better ... Moreover, because of the higher velocity, the piezo injector could cause a better fuel penetration in the combustion chamber and, hence, a better fuel-air ... 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 the ... Piezoelectric injector testing is a far cry from standard port / PFI injector testing. GDI systems have various ways to trigger their injectors and do so at ...