When considering EHI operation in a standard CR system while the engine is running but the actuator is not energized which of the following is true?
A) rail pressure is at nozzle needle seat
B) rail pressure is present in the upper pressure field
C) the upper and lower pressure fields are at the same pressure
D) all of the above

Question

Quizplus · Accepted Answer

In a standard Common Rail (CR) system during EHI operation, when the engine is running but the actuator is not energized, all the statements are true: rail pressure is at the nozzle needle seat, rail pressure is present in the upper pressure field, and the upper and lower pressure fields are at the same pressure. This is because, without actuation, the system maintains a default state where pressures are equalized across these components.

When Considering EHI Operation in a Standard CR System While