Technician A says that overhead cam engines with unit injectors can provide the greatest actuation force for the highest injection pressures. Technician B says that pushrod engines that use a low-mounted camshaft can provide the same force as an overhead camshaft engine to its unit injectors. Who is correct?

Question

Quizplus · Accepted Answer

Technician A is correct because overhead cam engines can provide greater actuation force due to their direct actuation of the injectors, which is beneficial for achieving higher injection pressures. Pushrod engines, on the other hand, have more components between the camshaft and the injectors, which can reduce the force transmitted.

Technician a Says That Overhead Cam Engines with Unit Injectors