Abstract: The invention relates to a hydraulic assistance device comprising: a hydraulic machine (30) capable of driving a wheel (W) of the craft; a variable displacement pump (10) comprising a double-acting actuator (12) defining two control chambers (12 a, 12 b) for hydraulically controlling the capacity of said pump (10); two supply lines (40a, 40 b) that connect the hydraulic machine (30) and the variable displacement pump (30) in order to form a closed circuit, characterised in that the device further comprises: two control lines (80a, 80 b), each being respectively drawn from one of the two supply lines (40a, 40 b) and being configured to respectively supply one of the two control chambers (12a, 12 b); two electrically calibratable pressure limiters (90a, 90 b) respectively disposed on the two control lines (80a, 80 b).

Abstract: The invention relates to a hydraulic assistance device comprising: a hydraulic machine (30) capable of driving a wheel (W) of the craft; a variable displacement pump (10) comprising a double-acting actuator (12) defining two control chambers (12a, 12b) for hydraulically controlling the capacity of said pump (10); two supply lines (40a, 40b) that connect the hydraulic machine (30) and the variable displacement pump (30) in order to form a closed circuit, characterised in that the device further comprises: two control lines (80a, 80b), each being respectively drawn from one of the two supply lines (40a, 40b) and being configured to respectively supply one of the two control chambers (12a, 12b); two electrically calibratable pressure limiters (90a, 90b) respectively disposed on the two control lines (80a, 80b).