Two technicians are describing HEUI HIB-300 injector operation. Technician A says that lifting the poppet valve opens a passageway, allowing pressurized oil above the nozzle valve to drain to a low-pressure oil return. Technician B says that a spool valve moves from side to side controlled only by magnetic forces. Who is right?
A)A only"
B)B only"
C)Both A and B
D)Neither A nor B"

Question

Quizplus · Accepted Answer

Technician A is correct because lifting the poppet valve does open a passageway for pressurized oil to drain, which is part of the HEUI injector operation. Technician B is incorrect because the spool valve is not controlled only by magnetic forces; it is also influenced by hydraulic pressure.

Two Technicians Are Describing HEUI HIB-300 Injector Operation