Control method and control apparatus for a construction machine

Details Control method and control apparatus for a construction machine Control method and control apparatus for a construction machine

E - Fixed Constructions

02

F

E02F 9/20 (2006.01) E02F 3/43 (2006.01) E02F 9/22 (2006.01)

Patent

CA 2250899

A technique for controlling a construction machine in which an articulated arm mechanism installed in a construction machine body is driven by a cylinder actuator connected to a hydraulic circuit having pumps (51, 52) capable of varying its discharge pressure depending upon the manipulated variable by an operating member (8) and operated by the discharge pressures of the pumps (51, 52). By keeping the discharge pressures of the pumps (51, 52) above predetermined values even when the operating member (8) is at a non-driving position of the cylinder actuator, it is possible to suppress the response delay and the increase in dead zones of the pumps (51, 52) even immediately after the start of driving of the arm mechanism to improve finish accuracy by a work member.

L'invention concerne une technique de commande d'une machine de construction dans laquelle un mécanisme de bras articulé installé dans une carrosserie de machine de construction est commandé par un actionneur à vérin relié à un circuit hydraulique comportant des pompes (51, 52) capables de varier sa pression de décharge, en fonction de la variable manipulée, par un élément de commande (8), et commandé par les pressions de décharge des pompes (51, 52). Le fait de garder les pressions de décharge des pompes (51, 52), au-dessus de valeurs préderminées, même lorsque l'élément de commande (8) n'est pas en position de commande de l'actionneur à verin, il est possible de supprimer le retard de réponse ainsi que l'augmentation des zones neutres des pompes (51, 52) même immédiatement après le début de la commande du mécanisme de bras, afin d'améliorer la précision de finition par un élément de travail.

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