The five core functions of a car's suspension system include cushioning road impacts, maintaining tyre grip, enhancing handling stability, optimizing ride comfort, and ensuring driving safety. Through the synergistic effect of springs and shock absorbers, the suspension system absorbs vibrations from uneven roads, reduces body jerking, and ensures continuous contact between the wheels and the ground to avoid slipping or loss of control. When turning or braking, the suspension can suppress body roll and pitch, maintaining the vehicle's dynamic balance. Independent suspension designs (such as MacPherson or multi-link types) allow the wheels to move independently, further reducing vibration transmission and improving comfort. The tuning of the suspension system requires a balance between stiffness and softness; while an overly soft setting improves comfort, it may compromise handling, and high-performance models often employ adjustable suspensions to adapt to different driving scenarios.