Final answer:
In a HEUI system, actuation oil directly acts on the plunger within the injector to pressurize and inject fuel into the combustion chamber.
Step-by-step explanation:
When actuation oil enters the Hydraulically Actuated Electronically Controlled Unit Injector (HEUI) system, it acts directly on the plunger within the injector. The actuation oil pressurizes the injector's plunger, which then pushes the fuel into the combustion chamber at high pressure. This is a critical step for the precise control of fuel injection in diesel engines equipped with HEUI systems.
Choices such as the injector solenoid, camshaft, and fuel tank, do not directly interact with the actuation oil in the context of a HEUI system. The injector solenoid is an electrical component that controls the timing of the injection, while the camshaft and fuel tank are not involved in the direct actuation of the injector's plunger through hydraulic oil.
the radius from the distance of separation between charges in electricity, you need to have information about the charges and their electric fields. The electric field is a measure of the force experienced by a positive test charge at a point in space. The electric field formula is given by E = kQ/r^2, where E is the electric field magnitude, k is the electrostatic constant, Q is the charge, and r is the distance between the charges.