Motor vehicle wheelset anti-roll device with actuating means operated by a hydraulic control circuit

An anti-roll device for a motor vehicle wheelset, said device comprising a bar adapted to be coupled to right and left wheels of said wheelset via two links, wherein, said anti-roll device comprises:

• i) actuating means forming part of said bar or of one of said links and comprising a casing defining a chamber subdivided into first and second parts of variable volumes by a piston, said chamber comprising first and second inputs/outputs communicating with said first and second parts respectively and an intermediate input/output communicating with said first part or said second part depending on the position of said piston in said chamber, and said actuating means being switchable between a disengaged state and blocked state in any given position of said piston, according to the respective current accessibility statuses of said first and second inlets/outlets and of said intermediate inlet/outlet, and
• ii) a hydraulic control circuit controlling said accessibility statuses according to commands received.