Abstract:
L'invention concerne une machine de manutention autonome comportant un module d'accouplement autonome (52) qui est configuré pour : - traiter un signal délivré par un capteur de détection spatiale (34, 57) et délivrer des informations de positionnement d'un l'outil (4, 5, 6) représentatives de la position et de l'orientation de l'outil (4, 5, 6) par rapport à la machine (2) ; - commander au moins un organe de direction (45, 46) et un moteur (44) en fonction des informations de positionnement de l'outil (4, 5, 6) de manière à positionner la machine (2) par rapport au cadre porte-outil (16) dans une position relative d'accouplement ; et - commander au moins un vérin de levage (24) et un vérin de bennage (25) lorsque la machine (2) est dans ladite position relative d'accouplement afin d'accoupler de manière autonome l'outil (4, 5, 6) au cadre porte-outil (16). L'invention concerne également une installation de manutention comportant une telle machine de manutention et un procédé de commande d'une telle machine de manutention.
Abstract:
Die Erfindung betrifft ein Verfahren zur Steuerung einer Drehzahl eines Antriebsmotors eines Nutzfahrzeugs (10) mit einer antreibbaren Ladeeinrichtung (12), wobei ein Bewegungsantrieb der Ladeeinrichtung (12) prädiziert oder erkannt wird, und bei prädiziertem oder erkanntem Bewegungsantrieb der Ladeeinrichtung (12) eine Erhöhung der Motordrehzahl des Antriebsmotors angefordert wird.
Abstract:
A control apparatus for a work vehicle (1) of a structure in which a movement of a bucket hydraulic cylinder (6) is restricted by abutment of a work equipment constituted by a bucket (4) and a boom (3) against a stopper, whereby the bucket in a dump position is forcibly actuated in a tilt direction and the bucket hydraulic cylinder is pressurized by a lifting operation of the boom, the control apparatus comprising: a bucket control valve (16) that controls a direction and a flow rate of a pressure oil supplied to the bucket hydraulic cylinder; boom detection means for detecting an angle or a height of the boom; bucket cylinder stroke detection means for detecting a stroke of the bucket hydraulic cylinder; boom operation direction detection means for detecting an operation direction of the boom; bucket operation direction detection means for detecting an operation direction of the bucket; storage means for storing an actuation region in which the bucket is forcibly actuated in a tilt direction and an actuation region close to this actuation region, in association with a work equipment posture specified by the boom angle or height and the bucket cylinder stroke; and control means (20) for controlling the bucket control valve so as to restrict an actuation speed of the bucket hydraulic cylinder in a dump direction when the work equipment posture specified by the detected boom angle or height and the detected bucket cylinder stroke is within the actuation region in which the bucket is forcibly actuated in the tilt direction or within the actuation region close to this actuation region, as determined with reference to the storage means, and when the detected boom operation direction is neutral or a lowering direction and the detected bucket operation direction is the dump direction.
Abstract:
An objective of the present invention is to provide a work vehicle and a work vehicle control method that can improve fuel consumption and suppress any decrease in ease of operation. In the work vehicle, the controller compares a predetermined threshold with the ratio between a lift force for raising the work implement and a traction force of the vehicle. The controller executes traction force reduction control for reducing the traction force in the case that an increase in the lift force is required.
Abstract:
Provided is a wheel loader having an HST type driving system. In order to make it possible to improve working efficiency in an eco mode when a power mode and the eco mode have been set in the wheel loader, the wheel loader is provided with a controller 18 which has an eco mode characteristic line 31, a power mode characteristic line 32, and a lifting operation characteristic line 34 having a matching point C located between a matching point A between a working device operating engine torque characteristic line 30 and the eco mode characteristic line 31 and a matching point B between the working device operating engine torque characteristic line 30 and the power mode characteristic line 32. The controller 18 includes a control portion which controls an HST pump 11 in accordance with the lifting operation characteristic line 34 when lifting operation of a lift arm 4 is detected in the condition that the eco mode has been selected by a work mode selecting portion 22.
Abstract:
A hydraulic system includes a first and a second rotating hydraulic machine, the first and second hydraulic machine being arranged to provide a torque via a common output shaft; a first valve arrangement for providing a differential hydraulic pressure level over the first hydraulic machine by using two sources of hydraulic fluid having different hydraulic pressure levels, a second valve arrangement for providing a differential hydraulic pressure level over the second hydraulic machine by using two sources of hydraulic fluid having different hydraulic pressure levels; and a control unit configured to control the first valve arrangement and the second valve arrangement such that different discrete levels of torque are provided via the output shaft of the hydraulic system. A hydraulic system for providing different discrete levels of torque using one hydraulic machine and a plurality of differential pressure levels, and a method for controlling a hydraulic system, are also provided.
Abstract:
This invention includes a hydraulic pump (9), a working implement (107) having a lift cylinder (13) driven by a hydraulic fluid supplied from the hydraulic pump (9), an operating device (104) for operating the working implement (107), a traveling motor (7) for driving wheels, and a main controller (100). When the lift cylinder (13) fails to operate despite an extending instruction being imparted to the lift cylinder (13) via the operating device (104), the main controller (100) reduces a limit value for an increase rate of a torque required in the traveling motor (7) to a value smaller than that applied when the lift cylinder (13) operates. With this configuration, occurrence of wheel slip during lifting of an object to be carried can be reduced.
Abstract:
A wheel loader 1 includes a body 2, a boom 3, a bucket 4, a boom cylinder 9, a bucket cylinder 10, a boom angle detection sensor 46, a bucket angle detection sensor 47, and a boom cylinder pressure sensor which detects lifting force as force applied to the boom. The wheel loader 1 starts a tilt operation of the bucket 4 when a predetermined condition is established, and ends the tilt operation on the basis of an amount of increase of the lifting force from the start of the tilt operation.
Abstract:
Es wird ein Lader (10) beschrieben. Der Lader (10) umfasst eine Laderschwinge (12) und einen an der Laderschwinge (12) angeordneten Werkzeugträger (26) oder ein Werkzeug, wobei der Werkzeugträger (26) oder das Werkzeug an einem ersten Schwenkpunkt (42, 44) mit der Laderschwinge (12) und an einem zweiten Schwenkpunkt (46, 48) mit einem Schwenkgestänge (24) verbunden ist, wobei das Schwenkgestänge (24) einen ersten und einen zweiten Lenker (30, 32, 34, 36) umfasst, die an einem ersten Lenkerpunkt (38, 40) schwenkbar miteinander in Verbindung stehen und wobei der erste Lenker (30, 32) an einem zweiten Lenkerpunkt (54, 56) an der Laderschwinge (12) und der zweite Lenker (34, 36) an einem zweiten Lenkerpunkt (50, 52) an dem zweiten Schwenkpunkt (46, 48) mit dem Werkzeugträger (26) oder dem Werkzeug schwenkbar verbunden sind, ferner ein Sensor (58) vorgesehen ist, mittels welchem ein Schwenkwinkel zwischen Werkzeugträger (26) oder Werkzeug und Laderschwinge (12) erfassbar ist. Um den Sensor möglichst effektiv zu schützen wird vorgeschlagen, dass der Sensor (58) in einem Hohlraum (76) am Lader positioniert ist und eine Betätigungseinrichtung (60) für den Sensor (58) angeordnet ist, welche sich teilweise durch eine an dem Hohlraum (76) ausgebildete Öffnung (74) erstreckt und den Sensor (58) mit dem Schwenkgestänge (24) verbindet.