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ELECTRO-HYDRAULIC CONTROL CIRCUIT OF A HYDRAULIC ACTUATOR FOR AN ELECTRIFIED WORK VEHICLE
Electro-hydraulic circuit (HC) comprising a fixed displacement hydraulic pump (P) and an electric motor (M) arranged to drive the hydraulic pump in rotation, a recovery tank (T) arranged to collect hydraulic oil, an actuator (BUCKET , BOOM, AUX) hydraulic arranged to move a work member (B, T) and be powered by the electro-hydraulic circuit, an directional open center electro-valve (VI, V2, V3) operatively interposed between said hydraulic pump and said actuator and defining a rest condition in which it isolates the hydraulic actuator by connecting the hydraulic pump with the recovery tank, and an overpressure valve (SV) interposed between the electro-hydraulic valve and the recovery tank and configured for open when a first predetermined pressure threshold is exceeded. The electric motor (M) is configured to deactivate when the electro-valve is in rest condition. In addition, a pressure sensor (PS) is associated with a portion of the circuit between the hydraulic pump and the electro-valve to keep the aforementioned portion of the hydraulic circuit pressurized.
ELECTRO-HYDRAULIC CONTROL CIRCUIT OF A HYDRAULIC ACTUATOR FOR AN ELECTRIFIED WORK VEHICLE
Electro-hydraulic circuit (HC) comprising a fixed displacement hydraulic pump (P) and an electric motor (M) arranged to drive the hydraulic pump in rotation, a recovery tank (T) arranged to collect hydraulic oil, an actuator (BUCKET , BOOM, AUX) hydraulic arranged to move a work member (B, T) and be powered by the electro-hydraulic circuit, an directional open center electro-valve (VI, V2, V3) operatively interposed between said hydraulic pump and said actuator and defining a rest condition in which it isolates the hydraulic actuator by connecting the hydraulic pump with the recovery tank, and an overpressure valve (SV) interposed between the electro-hydraulic valve and the recovery tank and configured for open when a first predetermined pressure threshold is exceeded. The electric motor (M) is configured to deactivate when the electro-valve is in rest condition. In addition, a pressure sensor (PS) is associated with a portion of the circuit between the hydraulic pump and the electro-valve to keep the aforementioned portion of the hydraulic circuit pressurized.
ELECTRO-HYDRAULIC CONTROL CIRCUIT OF A HYDRAULIC ACTUATOR FOR AN ELECTRIFIED WORK VEHICLE
ELEKTROHYDRAULISCHE STEUERSCHALTUNG EINES HYDRAULISCHEN AKTUATORS FÜR EIN ELEKTRIFIZIERTES ARBEITSFAHRZEUG
CIRCUIT DE COMMANDE ÉLECTROHYDRAULIQUE 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
ELECTRIC-HYDRAULIC CIRCUIT FOR THE ACTUATION OF A HYDRAULIC ACTUATOR FOR AN ELECTRIFIED WORK VEHICLE
| European Patent Office | 2024