citação:
Originalmente colocada por cloterico
citação:
Originalmente colocada por Nafs
A suspensão do Xantia Activa tem 10 esferas para que o sistema funcione em pleno
Se não me engano são 6 esferas. Uma por roda mais uma por cada eixos em lados contrarios.
Isso é nos modelos normais, porque o activa leva mais esferas.
Deixo um artigo interessante para lerem:
Xantia Activa has even more spheres
Compare with XM's Hydractive suspension, Xantia's Activa system has an additional anti-roll function.
Hydractive reduce body roll by stiffening the spring and damper in the price of ride. If it could stiffen the suspensions to as hard as Formula One racing cars, it would have achieve near-zero body roll under hard cornering. However, because we need an acceptable level of ride comfort in a road car, we cannot do that. Therefore Citroen developed the active anti-roll bar, added it to the Hydractive and becomes Xantia's Activa system.
Based on the Hydractive, Activa incorporates a gas-filled sphere in the middle of the anti-roll bar. The anti-roll bar is unusually thick at a diameter of 28 mm up front and 25 mm at the rear. The sphere acts as a cushion, thus allows the anti-roll bar to be twisted more easily. Therefore, the 28 mm anti-roll bar actually performs like a 23 mm one, thus offer less anti-roll function for normal drive.
When the car goes into a corner quickly, computer detects body roll thus close the valves in the sphere. This isolate the gas in the sphere thus eliminate the cushion effect. The anti-roll bar thus resume its original stiffness, acting exactly as a 28 mm anti-roll bar.
It doesn't end here. If the lateral acceleration is so strong that body roll continues to exceed 0.5 degree, fluid will be fed into 2 hydraulic rams at the front and rear which adjust the anti-roll bars to keep cornering level.
At any time, Xantia Activa rolls at most half a degree. This make it not only spectacular to look at, but also improve cornering speed. French magazine L'Automobile tested a Xantia Activa on skidpad and measured an amazing 0.94 g lateral acceleration. This compares competitively with many supercars - NSX managed 0.93 g, Ferrari 512TR 0.92 g, Toyota Supra 0.95 g and Ferrari F40's 1.01 g. This is even more impressive if you consider the Xantia wears just 205/55R15 tyres ! Most cars in its class manage around 0.8 g only !
Compare the skidpad figure with those of a number of cars and particularly high performance sports cars as measured by Car & Driver and you will see what that means:
Acura NSX 0.93 BMW 325 0.82
BMW M3 0.86 Corvette ZR-1 0.92
Camaro 0.78 Dodge Neon 0.80
Ferrari 512TR 0.92 Ferrari F40 1.01
Ford Mustang 0.82 Infiniti Q45 0.77
Jaguar XJS 0.77 Lexus SC300 0.82
Oldsmobile 88 0.79 SAAB 900SE 0.81
Volvo 850T 0.81 Toyota Supra T 0.95
Citroën Xantia 0.97
Xantia Activa cornering without roll:
