Hydropneumatic Suspension

Principle (see Pl.9)

The hydropneumatic suspension allies a suspension with large flexibility, a constant ride height:

- pneumatic suspension

- different fluid volume according to the load.

Each wheel is independently linked to the body by an arm connected to a piston; this piston acts on fluid which compresses gas contained in a suspension sphere fixed to the body (fig 1).

The two front arms, as well as the two rear arms, are connected by an anti-roll bar. This bar, according to the variation in forces, controls movements of a distributor valve.

Control variation of volume of liquid:

- Normal Height (Fig.2-2bis: identical).

- Correction of the height for a larger load:

Admission of extra fluid:

(Fig.3: Too low - Fig.3bis: Balance).

- Correction of the height for a smaller load:

Return of surplus fluid:

(Fig.4: Too high - Fig.4bis: Balance).