Technician A says that an EHI with a piezo actuator is capable of breaking up a single injection cycle into up to 7 separate pulses. Technician B says that during a CR EHI multipulse injection cycle, the pressure rises through each successive pulse. Who is correct?
A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B

Question

Quizplus · Accepted Answer

Technician A is correct because piezo actuators in electronic hydraulic injectors (EHI) can indeed break up a single injection cycle into multiple pulses, up to 7. Technician B is incorrect because the pressure does not necessarily rise with each successive pulse in a common rail (CR) multipulse injection cycle; the pressure is controlled and maintained by the system.

Technician a Says That an EHI with a Piezo Actuator