Accumulator device and hydropneumatic suspension

A hydropneumatic suspension, comprising:

• a suspension cylinder subjectable to different loads applied thereon;
• and
• an accumulator device being in fluid communication with said suspension cylinder and conveying an incompressible medium to said suspension cylinder, said accumulator device including
• a common accumulator housing having first and second end pieces at opposite ends thereof,
• a first dividing piston being guided for longitudinal movement inside said common accumulator housing and separating first and third media chambers in said common accumulator housing forming a first piston accumulator, said first dividing piston having a piston wall and a partition wall with a limit stop,
• a second dividing piston being guided for longitudinal movement within and on said piston wall in series with said first dividing piston and separating first media chamber and a second media chamber in said common accumulator housing forming a second piston accumulator, said first dividing piston with said partition wall having a greater first pressurizable cross-sectional area then a second pressurizable cross-sectional area of said second dividing piston, said first media chamber being between said first and second dividing pistons, said second media chamber being between said first dividing piston and said first end piece, said third media chamber being between said second dividing piston and said second end piece,
• a first compressible medium in said first media chamber between said first and second dividing pistons, and
• a non-compressible medium in said third media chamber conveyable into and out of said third media chamber via a port in said second end piece;
• whereby said first and second accumulators are formed as a unit and have separate characteristic accumulator curves independent from each other by pre-charge pressures in said first and second media chambers, resulting in an overall characteristic accumulator curve.