Technician A says that the beginning of injection is the point when fuel delivery begins and is referred to according to the position of the crankshaft measured in degrees of crankshaft rotation. Technician B says to produce the sharp increase in pressure when the nozzle valve first lifts from its seat, it is necessary to ensure that the valve moves very slowly. Who is right?

Question

Quizplus · Accepted Answer

Technician A is correct because the beginning of injection is indeed defined by the crankshaft position in degrees. Technician B is incorrect because a sharp increase in pressure requires the valve to move quickly, not slowly.

Technician a Says That the Beginning of Injection Is the Point