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1. WO2015041822 - HYDRAULIC CONTROL SYSTEM FOR MACHINE

Publication Number WO/2015/041822
Publication Date 26.03.2015
International Application No. PCT/US2014/052980
International Filing Date 27.08.2014
IPC
E02F 9/22 2006.1
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
CPC
E02F 3/435
EFIXED CONSTRUCTIONS
02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
FDREDGING; SOIL-SHIFTING
3Dredgers; Soil-shifting machines
04mechanically-driven
28with digging tools mounted on a dipper- or bucket-arm ; , i.e. there is either one arm or a pair of arms; , e.g. dippers, buckets
36Component parts
42Drives for dippers, buckets, dipper-arms or bucket-arms
43Control of dipper or bucket position; Control of sequence of drive operations
435for dipper-arms, backhoes or the like
E02F 9/123
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
08Superstructures; Supports for superstructures
10Supports for movable superstructures mounted on travelling or walking gears or on other superstructures
12Slewing or traversing gears
121Turntables, i.e. structure rotatable about 360°
123Drives or control devices specially adapted therefor
E02F 9/2217
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
2217with energy recovery arrangements, e.g. using accumulators, flywheels
E02F 9/2235
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
2221Control of flow rate; Load sensing arrangements
2232using one or more variable displacement pumps
2235including an electronic controller
E02F 9/2296
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
2278Hydraulic circuits
2296Systems with a variable displacement pump
F15B 1/024
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
1Installations or systems with accumulators; Supply reservoir or sump assemblies
02Installations or systems with accumulators
024used as a supplementary power source, e.g. to store energy in idle periods to balance pump load
Applicants
  • CATERPILLAR INC. [US]/[US]
Inventors
  • SHANG, Tonglin
  • CHEN, Dayao
Agents
  • SPILLMAN, M. Daniel
Priority Data
14/028,61817.09.2013US
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) HYDRAULIC CONTROL SYSTEM FOR MACHINE
(FR) SYSTÈME DE COMMANDE HYDRAULIQUE POUR ENGIN
Abstract
(EN) A hydraulic control system (50) for a machine (10) is disclosed. The hydraulic control system (50) includes a pump (58) configured to pressurize a fluid, and a swing motor (49) selectively driven by pressurized fluid from the pump (58). The swing motor (49) is configured to move a part of the machine (10). The hydraulic control system (50) also includes a controller (100) in communication with the pump (58). The controller (100) is configured to receive an input indicative of a difference between a desired speed and an actual speed of the swing motor (49), and determine if the swing motor (49) is accelerating, decelerating, or operating at neutral mode. The controller (100) is configured to determine an amount of return fluid from an actuator of the machine (10) that is available as makeup fluid for the swing motor (49) if the swing motor (49) is operating at neutral mode. The controller (100) is configured to control the pump (58) based on at least the amount of return fluid.
(FR) Cette invention concerne un système de commande hydraulique (50) destiné à un engin (10). Ledit système de commande hydraulique (50) comprend une pompe (58) conçue pour pressuriser un fluide, et un moteur de giration (49) sélectivement entraîné par le fluide pressurisé provenant de la pompe (58). Le moteur de giration (49) est conçu pour déplacer un élément de l'engin (10). Ledit système de commande hydraulique (50) comprend en outre un contrôleur (100) qui communique avec la pompe (58). Ledit contrôleur (100) est conçu pour recevoir une entrée indiquant une différence entre une vitesse voulue et une vitesse réelle du moteur de giration (49), et pour déterminer si le moteur de giration (49) est en train d'accélérer, de décélérer ou de fonctionner au point mort. Ledit contrôleur (100) est conçu pour déterminer une quantité de retour de fluide en provenance d'un actionneur de la machine (10) qui est disponible en tant que fluide de d'appoint pour le moteur de giration (49) si le moteur de giration (49) fonctionne au point mort. Le contrôleur (100) est conçu pour commander la pompe (58) au moins sur la base de la quantité de fluide de retour.
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