Abstract: The invention relates to a system (2) for controlling a disengageable hydraulic transmission (1) for a vehicle, involving the circulation and the pressurisation of a transmission fluid, said system (2) comprising: —means (21) for collecting information relative to the operation of the hydraulic transmission (1) since the last time the transmission was serviced, —means (22) for estimating an ageing state of the transmission fluid based on the information collected, and —means (23) for controlling the disengageable hydraulic transmission (1) as a function of the estimated ageing state.

Abstract: The invention relates to a device comprising a first hydraulic apparatus (M1) and a second hydraulic apparatus (M2), the two motors (M1, M2) being connected by a first line (11) and a second line (12) enabling the admission or discharge of the oil in said motors (M1, M2), a booster pump (30), arranged between a tank and a booster line, the booster line communicating with at least one of said lines (11, 12), characterized in that the pump (30) is configured to be able to suck oil into the booster line in order to allow the decompression of said first and second lines (11, 12). The invention also relates to a method for evacuating a device of the type described above, in which the booster pump (30) is activated in suction mode in the booster line to enable the disengagement of the machines (M1, M2).

Abstract: The invention relates to a distributor device and pressure limiter suitable for being installed in a system comprising a first supply line (11) and a second supply line (12) able to contain pressurised oil, and comprising an evacuation and/or booster line (10), characterised in that the device comprises means forming a pressure selector (72) suitable for connecting the lower-pressure supply line to the evacuation and/or booster line and means (71) forming two valves respectively associated with one of the two supply lines (11, 12) and suitable for opening in the event of an overpressure greater than a predetermined threshold on the associated supply line in order to discharge the corresponding overpressure to the evacuation and/or booster line (10) or to the other supply line, the two relief valves comprising a common plug (162) which engages with a single seat (155).

Abstract: The invention relates to a device comprising a first hydraulic apparatus (M1) and a second hydraulic apparatus (M2), the two motors (M1, M2) being connected by a first line (11) and a second line (12) enabling the admission or discharge of the oil in said motors (M1, M2), a booster pump (30), arranged between a tank and a booster line, the booster line communicating with at least one of said lines (11, 12), characterised in that the pump (30) is configured to be able to suck oil into the booster line in order to allow the decompression of said first and second lines (11, 12). The invention also relates to a method for evacuating a device of the type described above, in which the booster pump (30) is activated in suction mode in the booster line to enable the disengagement of the machines (M1, M2).