NOVELTY - The hydropneumatic arrangement for generating energy in a transport vehicle comprising a body and wheels, comprises a generator made of electroactive polymer laid at the body to transform a part of mechanical vibration of the body into electrical energy by its deformation, a primary circuit comprising the generator and a primary switch for charging the variable capacitor, and a secondary circuit comprising a secondary switch for transmitting a signal generated by the variable capacitor by the mechanical deformation of the electroactive polymer.    USE - The hydropneumatic arrangement is useful for generating energy in a transport vehicle comprising a body and wheels.    ADVANTAGE - The hydropneumatic arrangement is capable of simply and economically generating energy in a transport vehicle in less time without creating any mechanical vibrations in the body.    DETAILED DESCRIPTION - The hydropneumatic arrangement for generating energy in a transport vehicle comprising a body and wheels, comprises a generator made of electroactive polymer laid at the body to transform a part of mechanical vibration of the body into electrical energy by its deformation, a primary circuit comprising the generator and a primary switch for charging the variable capacitor, a secondary circuit comprising a secondary switch for transmitting a signal generated by the variable capacitor by the mechanical deformation of the electroactive polymer resulting a change of capacitance of the capacitor, and a unit for controlled switches. The electroactive polymer is equivalent to a variable capacitor. An electrical storage device is arranged with a capacitor, a super capacitor or a rechargeable battery. The arrangement further comprises a rectifier, and a filtering and/or regulatory element. The electroactive polymer is present in the form of a dielectric membrane (21). The membrane comprises electrodes comprising deposited or sprayed carbon, carbon fibers, carbon nanotubes, electronic conductive metal oxides or electronic conductive polymers. The membrane is inserted between two fluids (22, 23) such as a compressible fluid and a low compressible fluid of which the increased pressure produces a deformation of the membrane, and associated with the suspension system of the transport system and with suspension plots of the engine. The low compressible fluid is the fluid of the hydraulic suspension system. The membrane made of electroactive polymer is laid linearly along a spring and/or arranged linearly and formed by an interpenetrated polymer network, comprises a multilayer plane structure, and is present in the form of fibers forming a soft tissue. The membrane is rolled around the spring of the suspension system of transport system or around a suspension spring of the exhaust. The membrane is further placed at the suspension mounts of the suspension system in addition or in place of suspension mounts, and in a seat of a transport vehicle for undergoing deformations transmitted by the vibrations of a person sitting on the seat and for positioning on a roof, floor or side panels of a transport vehicle. The mechanical resonant frequency coincides with the frequency of electrical excitation of the electrical device.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of a hydropneumatic arrangement.    Membrane (21)    Fluids (22, 23)    Accumulator (24)    Tire (25)    Shock absorber. (30)