HYDROSTATIC DRIVE HAVING A CLOSED CIRCUIT AND METHOD FOR OPERATING THE DRIVE

The aim of the invention is a drive, which permits a lowering in the feed pressure provided by the feed pump and, at the same time, effects a supply to the displacement unit of the drive which meets the demand with regard to pressure and delivery volume. This aim is achieved in that the displacement unit (5) is supplied with hydraulic energy by an electro-hydraulic supply unit (6), wherein the supply unit (6) comprises a hydraulic reservoir (9) and a non-return valve (18) and is connected to the feed pressure limiting valve (12), which is implemented as an electrically adjustable pressure limiting valve, wherein the hydraulic reservoir (9) is also connected to an electro-hydraulic pressure sensor (10), which outputs the electric signal thereof to an electric auxiliary controller (11), andwherein the electric auxiliary controller (11) drives the feed pressure limiting valve (12). Hydraulic drives according to the invention are used, for example, in self-propelled working machines. 本发明的目的是种驱动器，其允许降低由进给泵提供的进给压力，