What effect does a dual-mass flywheel have on engine performance?

A dual-mass flywheel is designed to reduce noise and vibration transmitted from the engine to the drivetrain. This is particularly beneficial because internal combustion engines produce vibrations due to the reciprocating motion of pistons and the firing order of cylinders. The dual-mass flywheel absorbs some of these vibrations between the engine and transmission, leading to a smoother operation and less cabin noise, creating a more comfortable driving experience.

While dual-mass flywheels can contribute to improved performance aspects such as fuel efficiency indirectly, the primary function is to dampen vibrations and reduce noise. This is why the option focusing on reducing noise and vibration stands out as the most accurate effect of a dual-mass flywheel on engine performance.