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

A dual-mass flywheel is specifically designed to reduce noise and vibration in the drivetrain. It achieves this by using two separate masses that are allowed to move independently to dampen the engine's vibrations. This setup absorbs shocks and minimizes the transfer of engine vibrations to the transmission and, subsequently, to the rest of the vehicle. By softening these vibrations, a dual-mass flywheel contributes to a smoother driving experience, making it easier on the vehicle components as well as more comfortable for the passengers.

While dual-mass flywheels can have indirect effects on aspects like fuel efficiency or power output by allowing smoother engagement and reducing harshness, their primary function and benefit is focused on reducing noise and vibration, contributing significantly to the overall refinement of the vehicle's operation.