What does the suspension system control in a car?

The suspension system of a car is a key device connecting the body and wheels, mainly composed of components such as springs, shock absorbers, suspension arms, and stabilizer bars. The suspension system absorbs vibrations through elastic elements, the shock absorbers dampen spring oscillations, the guiding mechanism maintains wheel alignment accuracy, and the stabilizer bar effectively reduces body roll during cornering. Based on structural differences, suspensions are divided into two categories: independent and non-independent. Independent suspensions (such as MacPherson strut and multi-link types) can handle vibrations from individual wheels independently, improving handling and comfort but at higher costs. Non-independent suspensions (such as torsion beam types) have a simpler structure and lower maintenance costs but offer slightly reduced comfort. Suspension tuning requires balancing handling and comfort. Regular inspection of suspension components (such as checking for shock absorber fluid leaks and bushing wear) is crucial for driving safety, and maintaining proper tyre pressure helps avoid additional stress. The proper design and maintenance of the suspension system directly influence a vehicle's dynamic performance, making it one of the key considerations when selecting a car.