MacPherson strut suspension is a type of independent suspension widely used on the front wheels of vehicles. Its main components include a coil spring, a shock absorber, and an A-arm lower control arm:
The function of the shock absorber is to prevent the coil spring from shifting forwards, backwards, left, or right when subjected to force, while limiting the spring to only vertical vibrations. By adjusting the stroke and damping of the shock absorber and pairing it with coil springs of different stiffnesses, the suspension performance can be tuned.