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A hydropneumatic system combines the advantages of hydraulic systems and pneumatic systems so that gas absorbs excessive force and liquid in hydraulics directly transfers force. The suspension system usually features both self-leveling and driver-variable ride height, to provide extra clearance in rough terrain.
The central part of the hydraulic system was the high-pressure pump, which maintained a pressure of between 13 and 15 MPa; 1,900 and 2,200 psi (130 and 150 bar) in two accumulators. These accumulators were very similar in construction to the suspension spheres. One was dedicated to the front brakes, and the other ran the other hydraulic systems ...
The Xantia also was the last Citroën vehicle to use a common hydraulic circuit for suspension, brakes and steering like the pioneering Citroën DS. The Xantia had several variants of the Hydraulic system: Hydropneumatic suspension (5 spheres) Hydractive 2 suspension (7 spheres) Hydropneumatic (anti-sink) suspension (6 spheres) [4]
It has what Citroen (a brand with a long history of focusing on comfort) calls Progressive Hydraulic Cushions. These are, in effect, snazzy valves at the top of the suspension that help to soothe ...
This high-pressure hydraulic system would form the basis of over 9 million Citroën cars, including the DS, SM, GS, CX, BX, XM, Xantia, C5, and C6. Self-levelling suspension is the principal user benefit: the car maintains a constant ride height above the road, regardless of passenger and cargo load and despite the very soft suspension.
The Type 92 that Lotus raced in the 1983 Formula 1 season used an active hydraulic suspension system to control height as downforce levels increased. ... pitch-free ride of a Citroen CX with a ...
Paul Ernest Mary Magès (1908–1999) is known for his invention of the first self-leveling automobile suspension, known as hydro-pneumatic suspension.This system replaced conventional steel springs with an adaptive system of hydraulic struts, resulting in a motoring experience that felt like no other automobile of the era.
An active suspension is a type of automotive suspension that uses an onboard control system to control the vertical movement of the vehicle's wheels and axles relative to the chassis or vehicle frame, rather than the conventional passive suspension that relies solely on large springs to maintain static support and dampen the vertical wheel movements caused by the road surface.