Post: Shock absorber single tube

Mercedes was the first car manufacturer to install monotube shock absorbers as standard on some of its models, starting in 1958. They were manufactured by Bilstein, who patented the design and debuted in 1954. Because the design was patented, no other manufacturer was able to use it until the patent expired in 1971.
A monotube shock absorber is also a gas-pressure shock absorber, also in the form of a coilover, consisting of only one tube (the pressure tube), but with two pistons. These pistons, known as the working piston and the separating piston or floating piston, move synchronously relative to each other within the pressure tube in response to changes in the smoothness of the road surface. The two pistons also completely separate the liquid and gas components of the shock absorber. The overall design of a monotube shock absorber is always much longer than a twin-tube shock absorber, making it difficult to install on passenger cars designed for twin-tube shock absorbers. However, unlike a twin-tube shock absorber, a monotube shock absorber can be installed in any direction – it does not have any directionality. Also, it does not have a compression valve, whose role has been replaced by the separating piston. Although monotube shocks contain nitrogen, the gas is at high pressure (about 260-360 psi), which can actually help it support part of the vehicle’s weight, something other shocks can’t do.
Remote Reservoir/Piggyback
An additional oil line or oil container connected to the (main) shock’s oil chamber by a flexible tube (remote reservoir) or a non-flexible tube (piggyback shock). Increases the amount of oil a shock can carry without increasing its length or thickness.
Spool Valve
Spool-valve shocks feature a hollow cylindrical sleeve with machined oil passages instead of traditional flexible discs or shims. Spool valves can be used with monotubes, twin tubes, and/or position-sensitive packages, and are compatible with electronic controls.
A patent application filed by Multimatic in 2010 mentions that the main benefit is the elimination of the performance ambiguity associated with flexible shims, resulting in a mathematically predictable, repeatable, and stable pressure-flow characteristic.
Bypass Shock
Allows independent suspension adjustment for each portion of the suspension travel. Bypass shock absorber, double bypass shock absorber, triple bypass shock absorber, etc. The triple bypass shock absorber will have a separate set of suspension adjustment controls for each of its three suspension travel parts (initial travel, mid-travel, full travel).