When a typical CR-EHI is energized by the injector driver, which of the following occurs first?
A) pressure in the valve control chamber rises
B) pressure in the valve control chamber collapses
C) an injection pulse begins
D) an injection pulse

Question

Quizplus · Accepted Answer

When a typical Common Rail Electro-Hydraulic Injector (CR-EHI) is energized by the injector driver, the pressure in the valve control chamber collapses first. This is because the energizing of the injector opens a valve that allows the high-pressure fuel to escape from the control chamber, reducing its pressure and enabling the main injection process to start.

When a Typical CR-EHI Is Energized by the Injector Driver