公开(公告)号：US11613451B2

公开(公告)日：2023-03-28

申请号：US16734899

申请日：2020-01-06

Applicant: DANFOSS POWER SOLUTIONS II Technology A/S

Inventor： Vincent Joseph Duray ,  Jerry Carl Weber

IPC: B66D1/40 ,  B66D1/44 ,  B66D1/08 ,  B66D1/02

Abstract: The present disclosure relates to a hydraulic system including a variable displacement hydraulic motor for lifting and lowering a load. The hydraulic motor has a high operating speed and a low operating speed. The system also includes an actuator for controlling whether the hydraulic motor is operating at the high or low speed, and a pressure sensor for sensing when a system pressure corresponding to the hydraulic motor exceeds a threshold pressure value. The system further includes a speed control system that controls the actuator such that the hydraulic motor is prevented from operating at the first operating speed when the system pressure exceeds the threshold pressure value.