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A platform for research: civil engineering, architecture and urbanism
ELECTRIC-HYDRAULIC CIRCUIT FOR THE ACTUATION OF A HYDRAULIC ACTUATOR FOR AN ELECTRIFIED WORK VEHICLE
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 hydraulic actuator (BOOM, BUCKET, AUX) arranged to move an member or work tool and be powered by the hydraulic circuit, a proportional directional solenoid valve (V1, V2, V3) with open center and comprising a rest condition wherein it isolates the hydraulic actuator by connecting the hydraulic pump with the recovery tank, and a processing unit (STK) configured to receive the electrical signals of an input device (joystick) and generate electrical control signals (Spool Command, Rev, Torque) for the valves (V1, V2, V3) and for the engine (M); and programmed to detect the torque of the motor (M) and, when the torque of the motor (M) exceeds a predefined limit value, it commands the execution of at least one power reduction operation by reducing the number of revolutions of the motor (M) and/or bringing the corresponding solenoid valve (V1, V2, V3) to the neutral position with open center.
ELECTRIC-HYDRAULIC CIRCUIT FOR THE ACTUATION OF A HYDRAULIC ACTUATOR FOR AN ELECTRIFIED WORK VEHICLE
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 hydraulic actuator (BOOM, BUCKET, AUX) arranged to move an member or work tool and be powered by the hydraulic circuit, a proportional directional solenoid valve (V1, V2, V3) with open center and comprising a rest condition wherein it isolates the hydraulic actuator by connecting the hydraulic pump with the recovery tank, and a processing unit (STK) configured to receive the electrical signals of an input device (joystick) and generate electrical control signals (Spool Command, Rev, Torque) for the valves (V1, V2, V3) and for the engine (M); and programmed to detect the torque of the motor (M) and, when the torque of the motor (M) exceeds a predefined limit value, it commands the execution of at least one power reduction operation by reducing the number of revolutions of the motor (M) and/or bringing the corresponding solenoid valve (V1, V2, V3) to the neutral position with open center.
ELECTRIC-HYDRAULIC CIRCUIT FOR THE ACTUATION OF A HYDRAULIC ACTUATOR FOR AN ELECTRIFIED WORK VEHICLE
ELEKTROHYDRAULISCHER KREISLAUF ZUR BETÄTIGUNG EINES HYDRAULISCHEN AKTUATORS FÜR EIN ELEKTRIFIZIERTES ARBEITSFAHRZEUG
CIRCUIT ÉLECTRIQUE-HYDRAULIQUE POUR L'ACTIONNEMENT D'UN ACTIONNEUR HYDRAULIQUE POUR UN VÉHICULE DE TRAVAIL ÉLECTRIFIÉ
GARRAMONE ADRIANO (author) / GRAVILI ANDREA (author) / LIBERTI STEFANO (author) / VENEZIA ANTONIO (author)
2024-09-11
Patent
Electronic Resource
English
| European Patent Office | 2024
ELECTRO-HYDRAULIC CONTROL CIRCUIT OF A HYDRAULIC ACTUATOR FOR AN ELECTRIFIED WORK VEHICLE
| European Patent Office | 2024