Suspension is the system that connects a vehicle to its wheels and allows relative motion between the two. Suspension includes springs, shock absorbers, linkages, wheels and tires.
The main purpose of suspension is supporting both road holding and ride quality. Suspension system affects on the vehicle handling too. It is very important to keep the road wheel in contact with the road surface, for the suspension.
There are different ways of attaching the wheels of the car so that they can move up and down on their springs and dampers. The design of front suspension and design rear suspension have some differences to the ability of opposite wheels to move independently of each other.
For front-wheel drive cars, rear suspension has few constraints and a variety of beam axles and independent suspensions are used.
For rear-wheel drive cars, rear suspension has many constraints and the development of the superior but more expensive independent suspension layout has been difficult.
Four-wheel drive cars often has suspensions that are similar for both the front and rear wheels.
The design of independent and dependent suspension have some differences to the ability of opposite wheels to move independently of each other, so suspensions classified in two types:
Type of suspension:
- Dependent suspension;
- Independent suspension.