Types of Shock absorbers
Basic Twin-tube shock absorbers
The Twin Tube shock absorbers are also known as “two-tube” shock absorbers. They consist of two tubes, an inner tube is called the “working tube” and an outer tube is called the “reserve tube”. At the bottom, on the inside is a compression valve or base valve. When the piston is forced up or down by bumps in the road, hydraulic fluid moves between different chambers via small holes in the piston which converts the shock energy to improve the overall comfort of your journey
Twin-tube gas charged shock absorbers
Known as a “gas cell two-tube”, this has a significant advancement over the basic twin-tube. Its overall structure is very similar to the twin-tube, but a low-pressure charge of nitrogen gas is added to the reserve tube. This causes a reduction in foaming or aeration, which is an undesirable outcome of a twin-tube shock absorbes when they overheat and fail which presents as foaming hydraulic fluid dripping out of the assembly. Twin-tube gas charged shock absorbers are in the majority of modern cars.
Mono-tube shock absorbers
As its name implies mono-tube shock absorbers, comes in a coil over format and consists of only one tube, the pressure tube. The two pistons are in mono-tube shock absorbers are called the working piston and the dividing piston, and they move in relative synchronous inside the pressure tube in response to changes in road smoothness. The two pistons also completely separate the shock’s fluid and gas components. The mono-tube shock absorber makes it more difficult to mount in passenger cars designed for twin-tube shocks.