Technician A says that a late-model engine equipped with a VGT will close the vanes to increase intake boost and exhaust backpressure during braking. Technician B says the vanes will open to reduce intake airflow during engine braking. Who is correct?

Question

Quizplus · Accepted Answer

Technician A is correct because closing the vanes in a Variable Geometry Turbocharger (VGT) increases exhaust backpressure and intake boost, which enhances engine braking.

Technician a Says That a Late-Model Engine Equipped with a VGT