FIELD: machine building.
SUBSTANCE: invention relates to power units of working machines. A working machine comprises a primary power unit and an auxiliary power unit. An electrical processing circuit selectively connects the primary power unit with the primary load and the auxiliary power unit with the external load. The auxiliary and the primary power units comprise motor-generators connected to each other. Working machine operation method involves stages when advancing load is actuated by the primary power unit and the load initiated by an operator is actuated by the auxiliary power unit.
EFFECT: higher output of power units.
22 cl, 3 dwg
