Precision Engineered Piezoelectric Injectors Outpace Electromagnetic Actuators

... piezoelectric and electromagnetic injectors. However, before ranges ... The better ones have it in the range of less than 0.1Ω. In ... While direct actuator's stroke is generally lower than 100 μm, amplified piezo actuators can reach millimeter strokes. ... piezoelectric fuel injectors ... In CR, the electromagnetic/piezo actuator directly lifts the injector needle against constant fuel pressure. By constant, I don't mean that the pressure is ... It is also assumed that the dynamics of the piezo actuator from the electrical side is much faster than the dynamics from the mechanical side. However, some piezoelectric materials for sensors or actuators are adopted in elevated temperature environments, such as in applications for ... Piezo actuators have response times on the order of just a few tenths of a millisecond. The piezo-electric technology was commercialized in common rail ... According to Bosch, who introduced Piezo injectors to the industry, a Piezo actuator acts up to 5 times faster than a standard injector solenoid and the motion ... But solenoid injectors tend to vibrate more than piezo units, creating more noise. In a piezo injector, the electronic engine management system ... Piezoelectric transducers have replaced the electromagnetic actuator ... lower than those found in a diesel engine, the piezoelectric actuators act directly on ... The major advantage of piezoelectric injectors is their speed of operation and the repeatability of the movement of the valve. The dilation and retraction ...