公开(公告)号：US20230135081A1

公开(公告)日：2023-05-04

申请号：US17923368

申请日：2020-05-04

申请人： Volvo Construction Equipment AB

发明人： Karl Uebel ,  Per Mattsson ,  Daniel Stålberg

IPC分类号： E02F9/20 ,  E02F9/22

摘要： A power system for a working machine, including a prime mover drivingly connectable to a main shaft; a planetary gear set including a rotatable first member drivingly connected to the main shaft, a rotatable second member and a rotatable third member for propulsion of the working machine; a hydraulic system including at least one hydraulic actuator for performing a working function of the working machine; an electric energy storage system; a first hydraulic machine mechanically coupled to the main shaft and hydraulically coupled to the hydraulic system; a first electric machine mechanically coupled to the main shaft; a second electric machine mechanically coupled to the rotatable second member, wherein the electric energy storage system is electrically connected to the first and second electric machines, and wherein the power system further includes a second hydraulic machine mechanically coupled to the rotatable second member and hydraulically coupled to the hydraulic system.