公开(公告)号：US12123434B2

公开(公告)日：2024-10-22

申请号：US17602291

申请日：2019-04-08

Applicant: Volvo Construction Equipment AB ,  Norrhydro Oy

Inventor： Mika Sahlman ,  Jussi Mäkitalo ,  Ari Lappalainen ,  Peter Stambro

IPC: F15B11/04 ,  F15B1/02

CPC classification number: F15B11/04 ,  F15B1/024 ,  F15B2201/51 ,  F15B2201/515 ,  F15B2211/20546 ,  F15B2211/212 ,  F15B2211/625 ,  F15B2211/6309 ,  F15B2211/6346 ,  F15B2211/6654 ,  F15B2211/6656 ,  F15B2211/75 ,  F15B2211/763

Abstract: A hydraulic system includes: a high-pressure line; a pump configured to supply pressurized hydraulic fluid to the high-pressure line; a variable displacement hydraulic machine connected by a fluid connection to the high-pressure line for rotationally driving the rotatable load; an electronic control unit; an energy storing device connected to the high-pressure line and configured to communicate with the high-pressure line by receiving energy from the high-pressure line and/or supplying energy to the high-pressure line; and a first detector configured to detect the amount of energy stored in the energy storing device and to transmit a signal indicating said amount of energy stored to the electronic control unit. The electronic control unit is configured to control the volume flow intake of the variable displacement hydraulic machine dependent on a target output of the variable displacement hydraulic machine and on the detected amount of energy stored in the energy storing device.

公开(公告)号：US20220186750A1

公开(公告)日：2022-06-16

申请号：US17602291

申请日：2019-04-08

Applicant: Volvo Construction Equipment AB ,  Norrhydro Oy

Inventor： Mika Sahlman ,  Jussi Mäkitalo ,  Ari Lappalainen ,  Peter Stambro

IPC: F15B1/02 ,  F15B11/04

Abstract: A hydraulic system includes: a high-pressure line; a pump configured to supply pressurized hydraulic fluid to the high-pressure line; a variable displacement hydraulic machine connected by a fluid connection to the high-pressure line for rotationally driving the rotatable load; an electronic control unit; an energy storing device connected to the high-pressure line and configured to communicate with the high-pressure line by receiving energy from the high-pressure line and/or supplying energy to the high-pressure line; and a first detector configured to detect the amount of energy stored in the energy storing device and to transmit a signal indicating said amount of energy stored to the electronic control unit. The electronic control unit is configured to control the volume flow intake of the variable displacement hydraulic machine dependent on a target output of the variable displacement hydraulic machine and on the detected amount of energy stored in the energy storing device.

公开(公告)号：US11073170B2

公开(公告)日：2021-07-27

申请号：US16755079

申请日：2018-10-05

Applicant: NORRHYDRO OY

Inventor： Ari Lappalainen ,  Mika Sahlman ,  Jussi Mäkitalo ,  Peter Stambro

IPC: F15B1/02 ,  F15B11/04

Abstract: A hydraulic system including: a pressure line; a pump; an actuator; a valve device configured to control the flow of pressurized hydraulic fluid to the actuator; an electronic control unit configured to control the valve device by a control signal proportional to the desired speed of the actuator at any given time; a pressure accumulator capable of supplying, together with the pump, pressurized hydraulic fluid for moving the actuator; a sensor device configured to measure, directly or indirectly, the amount of pressurized hydraulic fluid in the pressure accumulator at any given time; setting devices configured to set a setting signal to be proportional with the desired speed of the actuator at any given time. The electronic control unit is configured to restrict the targeted speed of the actuator not to exceed a predetermined maximum speed which is proportional to the amount of pressurized hydraulic fluid in the pressure accumulator.