Technician A says that nozzle opening pressure (NOP) is adjusted with selective shims placed on top of the nozzle spring. Technician B says that NOP is electronically controlled in some of the latest injectors. Who is correct?

Question

Quizplus · Accepted Answer

Technician A is correct because traditional mechanical injectors use shims to adjust the nozzle opening pressure. Technician B is also correct because modern injectors, especially in common rail systems, can have electronically controlled NOP.

Technician a Says That Nozzle Opening Pressure (NOP) Is Adjusted