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1. WO2021039926 - CONSTRUCTION MACHINE

Publication Number WO/2021/039926
Publication Date 04.03.2021
International Application No. PCT/JP2020/032453
International Filing Date 27.08.2020
IPC
F15B 11/02 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
11Servomotor systems without provision for follow-up action
02Systems essentially incorporating special features for controlling the speed or the actuating force or speed of an output member
E02F 9/22 2006.01
EFIXED CONSTRUCTIONS
02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL-SHIFTING
FDREDGING; SOIL-SHIFTING
9Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/-E02F7/160
20Drives; Control devices
22Hydraulic or pneumatic drives
F15B 11/028 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
11Servomotor systems without provision for follow-up action
02Systems essentially incorporating special features for controlling the speed or the actuating force or speed of an output member
028for controlling the actuating force
F15B 11/08 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
11Servomotor systems without provision for follow-up action
08with only one servomotor
F15B 11/17 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
11Servomotor systems without provision for follow-up action
16with two or more servomotors
17using two or more pumps
CPC
E02F 9/22
EFIXED CONSTRUCTIONS
02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
FDREDGING; SOIL-SHIFTING
9Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
20Drives; Control devices
22Hydraulic or pneumatic drives
F15B 11/02
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
11Servomotor systems without provision for follow-up action; ; Circuits therefor
02Systems essentially incorporating special features for controlling the speed or actuating force of an output member
F15B 11/028
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
11Servomotor systems without provision for follow-up action; ; Circuits therefor
02Systems essentially incorporating special features for controlling the speed or actuating force of an output member
028for controlling the actuating force
F15B 11/08
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
11Servomotor systems without provision for follow-up action; ; Circuits therefor
08with only one servomotor
F15B 11/17
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
11Servomotor systems without provision for follow-up action; ; Circuits therefor
16with two or more servomotors
17using two or more pumps
Applicants
  • 日立建機株式会社 HITACHI CONSTRUCTION MACHINERY CO., LTD. [JP]/[JP]
Inventors
  • 清水 自由理 SHIMIZU Juri
  • 平工 賢二 HIRAKU Kenji
  • 齋藤 哲平 SAITOU Teppei
  • 高橋 宏政 TAKAHASHI Hiromasa
Agents
  • 特許業務法人開知国際特許事務所 KAICHI IP
Priority Data
2019-15781930.08.2019JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) CONSTRUCTION MACHINE
(FR) ENGIN DE CHANTIER
(JA) 建設機械
Abstract
(EN)
Provided is a construction machine in which lug down of an engine can be suppressed regardless of the operation content of an operator and the load state of a hydraulic actuator. On the basis of a required flow rate of the hydraulic actuator, inlet/outlet pressures of the hydraulic actuator, a required discharge flow rate of an open-circuit pump, and the outlet pressure of the open-circuit pump, a controller calculates a required torque that is the torque required at the engine from a closed-circuit pump and the open-circuit pump, and when the required torque variation rate that is the variation rate of the required torque exceeds a predetermined variation rate, the controller limits the discharge flow rate of at least one among the open-circuit pump and the closed-circuit pump.
(FR)
L'invention concerne un engin de chantier dans lequel le sous-régime d'un moteur peut être supprimé quels que soient la nature de l'opération d'un opérateur et l'état de charge d'un actionneur hydraulique. En fonction d'un débit requis de l'actionneur hydraulique, des pressions d'entrée/sortie de l'actionneur hydraulique, d'un débit requis de refoulement d'une pompe à circuit ouvert et de la pression de sortie de la pompe à circuit ouvert, un organe de commande calcule un couple requis, qui est le couple requis au niveau du moteur à partir d'une pompe à circuit fermé et de la pompe à circuit ouvert et, lorsque le taux de variation de couple requis, c'est-à-dire le taux de variation du couple requis, dépasse un taux de variation prédéfini, l'organe de commande limite le débit de refoulement de la pompe à circuit ouvert et/ou de la pompe à circuit fermé.
(JA)
オペレータの操作内容や液圧アクチュエータの負荷状態にかかわらず、エンジンのラグダウンを抑制できる建設機械を提供する。 コントローラは、液圧アクチュエータの要求流量と、前記液圧アクチュエータの出入口圧と、開回路ポンプの要求吐出流量と、前記開回路ポンプの出口圧とに基づいて、閉回路ポンプおよび前記開回路ポンプがエンジンに要求するトルクである要求トルクを演算し、前記要求トルクの変化率である要求トルク変化率が所定の変化率を上回った場合に、前記閉回路ポンプおよび前記開回路ポンプの少なくとも1つの吐出流量を制限する。
Also published as
Latest bibliographic data on file with the International Bureau