What is a Car Rear Suspension?
2 Answers
Car suspension refers to all the force-transmitting connecting devices between the frame (or load-bearing body) and the axle (or wheels), and it is one of the important parameters affecting the comfort of a car. The car suspension consists of three parts: elastic elements, shock absorbers, and force-transmitting devices. Below is a related introduction to the suspension structure: 1. The suspension system refers to a connecting structural system between the body, frame, and wheels, which includes components such as shock absorbers, suspension springs, anti-roll bars, suspension subframes, lower control arms, longitudinal rods, steering knuckle arms, rubber bushings, and connecting rods. When a car travels on the road, it experiences vibrations and impacts due to changes in the road surface. Some of these impact forces are absorbed by the tires, but most are absorbed by the suspension device between the tires and the body. 2. A typical suspension structure is composed of elastic elements, guiding mechanisms, and shock absorbers, with some structures also including buffer blocks and lateral stabilizer bars. Elastic elements come in forms such as leaf springs, air springs, coil springs, and torsion bar springs. Modern passenger car suspensions mostly use coil springs and torsion bar springs, while high-end luxury buses use air springs.
The rear suspension is the system that connects the body and the tires at the rear wheels of the car. Having driven many cars, I feel it acts like a flexible support leg, responsible for absorbing bumps and vibrations on the road, making rear passengers more comfortable. Specifically, it includes springs, shock absorbers, and various linkage components. The spring acts like a cushion, supporting the weight, while the shock absorber controls the bounce speed to prevent excessive sway. Popular types nowadays include the torsion beam, which is simple and affordable, suitable for regular family cars, and the independent type like multi-link suspensions, which offer better handling but are more complex—commonly used in high-end vehicles. As a mechanic, I often see them; regular checks for wear on springs and shock absorbers can prevent premature failure, especially when driving long distances on rough roads. A healthy suspension directly improves fuel efficiency and safety. A good suspension ensures steadier cornering, prevents nose-diving during braking, and boosts driving confidence.
