Arbeitsmaschine

Details

Veröffentlichungs-Nr.

EP4741587

Anmeldetag

28. Oktober 2025

Veröffentlichung

13. Mai 2026

Rechtsraum

EP

IPC

E02F9/22

Abstract

A working machine may comprise a tank; a working device including an actuator; an accumulator; a recovery path connecting the actuator and the accumulator; a return valve installed between the recovery path and the tank to control the flow rate of fluid discharged from the recovery path to the tank; a command generating device that generates a command; and a control unit that receives the command from the command generating device and controls the return valve so that the return valve has an opening amount corresponding to the command according to a preset relationship, thereby adjusting the operating speed of the actuator and the charging speed of the accumulator. The command generating device may be a first operator input device that receives a request from an operator for one of the operating speed of the actuator, the charging speed of the accumulator, and the opening amount of the return valve. As the requested operating speed input to the first operator input device becomes faster, the control unit may control the return valve to have a larger opening amount. The command generating device may be a sensor that detects the position of a predetermined portion of the working device. As the position of the predetermined portion of the working device detected by the sensor becomes lower, the control unit may control the return valve so that the return valve has a larger opening amount.

Anmelder

Firma

Volvo Construction Equipment AB

Land

🇸🇪 Schweden