One of the most important components of a vehicle is the suspension system. The primary purpose of a suspension system is to maximize the friction between the tires and the road surface, which improves ride quality and makes the vehicle easier to control. The suspension system is extremely important for the safety and comfort of the occupants inside the vehicle. Thanks to this system, the vehicle does not lose contact with the ground when passing over bumps or rough roads, and the passengers feel as if they are traveling on a smooth road.
Key Components of the Suspension System
1. Springs
Springs are one of the most important parts of the suspension system. They bear the entire weight of the vehicle, apart from the wheels. Due to their flexibility, they allow the wheels to move closer to the chassis over bumps and away from the chassis over potholes. This significantly dampens the vibrations experienced within the cabin.
Types of Automotive Springs:
Coil Springs
Leaf Springs
Torsion Bar Springs
Hydropneumatic Springs
Pneumatic Springs
2. Shock Absorbers (Dampers)
A suspension system without dampening acts like a launching mechanism. When the vehicle goes over a bump, the spring compresses and then releases, pushing the wheel back in the opposite direction. This causes the vehicle to bounce up and down, hit the ground, and rebound continuously. The component responsible for absorbing this energy and eliminating the continuous oscillation is called a shock absorber.
Today, almost all vehicles use hydraulic tube shock absorbers. These are divided into single-acting and double-acting types. Single-acting shock absorbers function in only one direction (either during compression or extension) and remain free in the other. Double-acting shock absorbers function during both extension and compression, and they are the most widely used type today.
Working Principle:
When weight is applied, the shock absorber is forced to compress, causing the piston rod to move downward inside a cylinder filled with hydraulic fluid. Since liquids cannot be compressed, the hydraulic fluid is forced through small valves in the piston. This hydraulic resistance dissipates most of the energy, effectively slowing down the movement. This process quickly dampens the vibrations and oscillations at the wheels.
3. Suspension Arms (Control Arms)
Another essential component is the suspension arm system, which connects the chassis to the wheels. The system connecting the front wheels is the front suspension, and the system connecting the rear wheels is the rear suspension. Suspension arms ensure that the tires remain flat on the road during turns and cornering. They are generally categorized into rigid and independent systems.
4. Ball Joints
Although small in size, ball joints are crucial components of the suspension system. They connect the steering knuckle to the control arms. They are categorized into upper ball joints and lower ball joints. They are sealed and pre-lubricated during manufacturing and cannot be re-lubricated later. Their main purpose is to maintain a secure connection between the wheels and the suspension while allowing freedom of movement during steering and suspension travel.
5. Sway Bars (Stabilizer Bars)
Sway bars, also known as stabilizer bars, play a critical role in handling. When a vehicle takes a corner, the centrifugal force causes the outer suspension to compress and the inner suspension to extend, causing body roll. The sway bar twists to reduce this difference between the left and right wheels, increasing steering control and preventing the vehicle from rolling excessively.
North Tuned: Optimizing Your Suspension for Peak Performance
At North Tuned, we understand that a high-performance engine requires a perfectly tuned chassis and suspension setup. Whether you are setting up your vehicle for track use or improving handling on the street, balancing power output with suspension dynamics is essential for maximum control and safety.