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ELECTRO-HYDRAULIC ACTUATION CIRCUIT OF A HYDRAULIC ACTUATOR FOR AN ELECTRIFIED WORK VEHICLE AND CORRESPONDING METHOD
An electro-hydraulic circuit includes a fixed displacement hydraulic pump (P) and an electric motor (M) arranged to drive the hydraulic pump in rotation, a recovery tank (T), a hydraulic actuator (BOOM, BUCKET), an open center proportional directional electro-valve (V1, V2) comprising a release condition in which it isolates the hydraulic actuator by hydraulically connecting the hydraulic pump with the recovery tank, a selector (SEL) to select a mode of execution of a repetitive operation of the actuator, a processing unit (STK) to receive the signals of the selector and an input device (Joystick) operated by a user and generate control signals for the electro-valve (V2) and for the engine (M), wherein a number of revolutions of the electric motor (M) is determined based on the selector and an amplitude of oscillation of the input device as it is manipulated by the user to perform the repetitive operation, and a frequency of the command signal for the electro-valve (V2) it is determined on the basis of a frequency acquired through the input device.
ELECTRO-HYDRAULIC ACTUATION CIRCUIT OF A HYDRAULIC ACTUATOR FOR AN ELECTRIFIED WORK VEHICLE AND CORRESPONDING METHOD
An electro-hydraulic circuit includes a fixed displacement hydraulic pump (P) and an electric motor (M) arranged to drive the hydraulic pump in rotation, a recovery tank (T), a hydraulic actuator (BOOM, BUCKET), an open center proportional directional electro-valve (V1, V2) comprising a release condition in which it isolates the hydraulic actuator by hydraulically connecting the hydraulic pump with the recovery tank, a selector (SEL) to select a mode of execution of a repetitive operation of the actuator, a processing unit (STK) to receive the signals of the selector and an input device (Joystick) operated by a user and generate control signals for the electro-valve (V2) and for the engine (M), wherein a number of revolutions of the electric motor (M) is determined based on the selector and an amplitude of oscillation of the input device as it is manipulated by the user to perform the repetitive operation, and a frequency of the command signal for the electro-valve (V2) it is determined on the basis of a frequency acquired through the input device.
ELECTRO-HYDRAULIC ACTUATION CIRCUIT OF A HYDRAULIC ACTUATOR FOR AN ELECTRIFIED WORK VEHICLE AND CORRESPONDING METHOD
ELEKTROHYDRAULISCHE BETÄTIGUNGSSCHALTUNG EINES HYDRAULISCHEN AKTUATORS FÜR EIN ELEKTRIFIZIERTES ARBEITSFAHRZEUG UND ENTSPRECHENDES VERFAHREN
CIRCUIT D'ACTIONNEMENT ÉLECTRO-HYDRAULIQUE D'UN ACTIONNEUR HYDRAULIQUE POUR UN VÉHICULE DE TRAVAIL ÉLECTRIFIÉ ET PROCÉDÉ CORRESPONDANT
GARRAMONE ADRIANO (author) / GRAVILI ANDREA (author) / LIBERTI STEFANO (author) / VENEZIA ANTONIO (author)
2024-06-12
Patent
Electronic Resource
English
ELECTRO-HYDRAULIC CONTROL CIRCUIT OF A HYDRAULIC ACTUATOR FOR AN ELECTRIFIED WORK VEHICLE
| European Patent Office | 2024
ELECTRIC-HYDRAULIC CIRCUIT FOR THE ACTUATION OF A HYDRAULIC ACTUATOR FOR AN ELECTRIFIED WORK VEHICLE
| European Patent Office | 2024