Drive system, in particular for a self-propelled construction machine, in particular soil compactor

A drive system, in particular for a self-propelled construction machine, in particular soil compactor, comprises a drive unit (26) comprising an internal combustion engine, at least one hydraulic circuit (30, 34) with a hydraulic pump (32, 36) that can be driven by the drive unit (26), and a hydraulic drive assist unit (38) with a hydraulic pump/motor assembly (40) and at least one pressure fluid accumulator (42), wherein the hydraulic pump/motor assembly (40) is drivingly coupled or can be coupled to the drive unit (26) and/or at least one hydraulic circuit (30, 34), wherein the hydraulic pump/motor assembly (40) can be operated in a charging operating state by the drive unit (26) and/or at least one hydraulic circuit (30, 34) as a pump for charging at least one pressure fluid accumulator (42) and can be operated in a drive assist operating state as a motor for providing a drive assist torque for the hydraulic pump (32, 36) of at least one hydraulic circuit (30, 34), characterized in that the hydraulic pump/motor assembly (40) can be operated in a starting operating state as a motor for starting the drive unit (26).