What is hydractive suspension?

What is hydractive suspension?

Hydractive uses a central ECU to control the firmness of the suspension, cutting down roll and sharpening the reactions to the steering, while keeping the ride quality good. At the heart of the system is a third sphere at each end of the car, in addition to the traditional wheel spheres.

How does Citroen suspension work?

Suspension works by means of a piston forcing LHM into the sphere, compressing the nitrogen in the upper part of the sphere; damping is provided by a two-way 'leaf valve' in the opening of the sphere. LHM has to squeeze back and forth through this valve which causes resistance and controls the suspension movements.

Why did Citroen stop hydropneumatic suspension?

Citroen will stop selling cars equipped with its once-renowned hydropneumatic suspension system. ... Jackson's comments confirm a report last month that Citroen has decided to scrap the in-house suspension as part of wider cost-cutting measures launched under PSA/Peugeot-Citroen CEO Carlos Tavares.

Is hydraulic suspension good?

One of the biggest advantages of a hydraulic suspension for your vehicle is that it can produce a firmer ride. Hydraulics are also very responsive and can react quicker than most other suspension systems. Best of all, these types of systems are completely customizable.

How much does hydraulic suspension cost?

The simplest systems cost around $400 U.S., while a more sophisticated set up can cost more that $1,000 -- just for the parts. The amount and cost of the labor involved depend on the system's complexity. The most coveted type of suspension is a hydraulic suspension.

How does active suspension work?

An onboard computer detects body movement from sensors throughout the vehicle and, using that data, controls the action of the active and semi-active suspensions. ... The system virtually eliminates body roll and pitch variation in many driving situations including cornering, accelerating, and braking.

Do Citroen still have hydraulic suspension?

With almost 10 years in the showrooms, the model is finally being phased out and the last example just rolled off PSA's assembly lines in Rennes, France. While that's a move everyone expected, the end of the production marks the last time, at least for now, Citroen uses its famous hydropneumatic suspension.

Do Citroen cars have air suspension?

Peugeot and Citroen's hydropneumatic suspension Citroen's system uses an hydraulic pump and pneumatic spheres filled with nitrogen gas to provide bump absorption - a happy spin-off being self-levelling so efficient that cars can even be driven on three wheels without the ride height being affected.

Are bags and hydraulics the same?

Air bag systems use a bag enclosed in a heavy rubber case, and a series of valves connected to a compressor to adjust ride quality and height. ... Hydraulic suspensions utilize hydraulic fluid and shocks or struts instead of air bags and air pressure.

What is hydraulic suspension used for?

Hydraulic suspension systems are relatively new to the automobile industry. The Hydraulic system uses oil and compressed gas in the place of springs to absorb forces emanating from the road surface. When tires hit a bump, the synthetic rubber and air in the tire absorb some of the force.

How does a hydraulic suspension system work?

• The upper part is filled with compressed nitrogen and the lower with LHM (Liquide Hydraulique Minérale), an incompressible mineral oil that is pumped around the system by a central pump. By altering the length of the fluid acting as a pushrod between the suspension arm and the sphere, the car’s ride height can be adjusted.

What is Citroën's Hydractive suspension?

• Citroën’s hydractive suspension was first introduced on the XM and is a refinement of Citroën’s justly famous oleopneumatic suspension first seen on the Traction Avant as long ago as 1952. Hydractive uses a central ECU to control the firmness of the suspension, cutting down roll and sharpening the reactions to the steering,...

What are the modes of the 3+ Hydractive hydraulic suspension?

• The 3+ hydractive hydraulic suspension has 3 automatic modes: Motorway position (lowering by 15 mm of the vehicle height above 110 km/h) Poor road surface position (raising by 13 mm of the vehicle height below 70 km/h) Comfort or dynamic suspension (variation of suspension firmness)

How does a Hydractive car work?

• The microprocessor based control system has inputs from five different sensors: These help the computer to determine the overall sensitivity of the system. In addition to the height lever present on all hydraulically suspended Citroens, Hydractive cars posess a mode switch.