Improved double hydraulic machine with a distribution valve and a driving system comprising such a hydraulic machine

A double hydraulic machine (100) with two operating cylinder capacities, comprising a case, a distributor (5, 6) a cylinder block (3) provided with a plurality of pistons (31) positioned facing a cam (4), said plurality of pistons (31) forming two disconnected sub-assemblies thus defining a first (M1) and a second (M2) elementary hydraulic machine selectively fed by the distributor (5, 6) each having a first orifice (A1, A2) and a second orifice (R1, R2) made in the distributor (5, 6), the double hydraulic machine (100) having three orifices (81, 82, 83) suitable for being connected to the first orifice (A1, A2) and to the second orifice (R1, R2) of the elementary hydraulic machines (M1, M2), characterized in that it further comprises a distribution valve (7) connecting said three orifices (81, 82, 83) of the hydraulic machine (100) to a distributor (5, 6), said distribution valve (7) may alternate between two configurations (C1, C2) and is configured for,

• in a first configuration, connecting the second orifice of the first elementary machine (M1) and of the second elementary machine (M2) to a first orifice (81) of the double hydraulic machine (100), and connecting the first orifice (A1) of the first elementary machine (M1) to a third orifice (83) of the double hydraulic machine (100) and the first orifice (A2) of the second elementary machine (M2) of the double hydraulic machine (100) to a second orifice (82) of the double hydraulic machine (100), and
• in a second configuration, connecting the second orifice (R1) of the first elementary machine (M1) to the first orifice (81) of the double hydraulic machine (100), and connecting the first orifice (A1) of the first elementary machine (M1) as well as the first (A2) and the second (R2) orifice of the second elementary machine (M2) both to the second orifice (82) and to the third orifice (83) of the double hydraulic machine (100).