Two technicians are discussing variable valve timing. Technician A says that changing the exhaust valve timing helps reduce exhaust emissions. Technician B says that changing the intake valve timing helps increase low-speed torque. Who is right?

Question

Quizplus · Accepted Answer

Both technicians are correct. Changing the exhaust valve timing can indeed help reduce exhaust emissions by ensuring more complete combustion. Adjusting the intake valve timing can increase low-speed torque by optimizing the air-fuel mixture's entry into the combustion chamber at lower speeds.

Two Technicians Are Discussing Variable Valve Timing