CNH Industrial Italia S.p.A. Patente

Agricultural or work vehicle comprising an internal combustion engine (E), an electro-hydraulic circuit (HC) for powering at least one hydraulic actuator (Al - A3) by means of a respective closed-center control valve (V1 - V3), comprising a first hydraulic pump (P) operatively connected to the internal combustion engine (E) to be driven in rotation by it to power said valves (V1 - V3) by means of a hydraulic supply line (PP), a transmission having a hydrostat (HY) comprising a second hydraulic pump (HP) operatively connected to the internal combustion engine (E) to be driven in rotation by it and a pair of hydraulic lines (F, R), wherein the first hydraulic pump has a variable displacement with a displacement value that is a function of a sensing signal generated by a sensing line (LS) connected downstream of said control valve (V1 - V3) and by a supply pressure signal generated by the supply line (PP). A compensation valve (A) is arranged to connect said pair of hydraulic lines (F, R) with said supply line (PP), wherein the compensation valve is controlled as a function of the sensing signal and the supply signal.

Pollutant abatement system (ATS) produced comprising in succession, from an exhaust gas inlet point (IN) and an outlet point (Out) of purified exhaust gas, a first SCR selective reduction catalyst (SCR_1), a diesel oxidation catalyst (DOC), a particulate filter (DPF), a second SCR (SCR_2), connection means (DV1, V2, V3, L1, L3a, L3b) configured to bypass the first SCR (SCR_1).

Agricultural or work vehicle comprising a hydraulic steering system (SS), at least one hydraulic working tool (HU) and a first hydraulic pump (P) for supplying the steering system by means of a hydraulic supply line (SL) and the at least one hydraulic working member, a hydrostat (HY) comprising a second hydraulic pump (HP) and a hydraulic motor (MP) operatively connected to at least one vehicle wheel (W), wherein the second hydraulic pump and the hydraulic motor are interconnected by means of a pair of hydraulic lines (F, R) and comprising a switching valve (SWV) arranged to connect said pair of hydraulic lines with said steering system in place of said first hydraulic pump, in conditions of failure of the first hydraulic pump.

Hydraulic circuit (HC) for an agricultural or work vehicle, wherein the agricultural or work vehicle comprises at least one working part such as an arm, a hydraulic lift, etc., a braking system (BI) comprising service braking means (7) and parking braking means (3, SAHR), and a user interface (14) for receiving a braking request from a user of the vehicle; wherein the hydraulic circuit comprises a variable displacement hydraulic pump (1), operatively connected to a directional valve assembly (4) for supplying said at least one working member, comprising a discharge valve (2) for recirculating hydraulic oil through cooling means, wherein said braking system comprises at least one braking valve (7) for actuating said service brake, operatively connected to said hydraulic pump, said parking braking means are configured to activate in response to said braking request, when a fault in said service braking means (7) is detected, said discharge valve is set so that an opening pressure threshold of the discharge valve is greater than a maximum supply pressure value of said at least one braking valve (7).

Method of supporting the completion of a mission of an agricultural or work vehicle operated by a computer, wherein the vehicle is equipped with an articulated arm (A) connected to a chassis (F) of the vehicle such as to assume a plurality of operational configurations, a propulsion system such as to allow movement of the vehicle with respect to a support surface, the method including monitoring (step 1) of a mission of the vehicle within a continuous and predetermined time interval and when it appears (steps 2 and 3) that the mission coincides with a pick & place mission, then the method comprises a step of suggesting (step 4) to the user or automatically operating the activation of a function of parallel movement of forks operationally connected to said articulated arm.

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

A hydraulically actuated braking system (3) for a work vehicle (1), comprising: variable flowrate pumping means (5), which are adapted to suck a hydraulic fluid from a tank (6) and are adapted to provide at outlet a pressurized flow of the hydraulic fluid; a hydraulic accumulator (8), which is fluidly connected downstream to the variable flowrate pumping means (5) and is adapted to store the pressurized hydraulic fluid fed by the variable flowrate pumping means (5); a hydraulically actuated brake assembly (9), which is operatively coupled to a wheel assembly of the work vehicle (1) and is fluidly connected to the hydraulic accumulator (8); a brake input device (11), which is adapted to be operated to control the operation of the brake assembly (9); and a brake actuation valve assembly (12), which is fluidly interposed between the hydraulic accumulator (8) and the brake assembly (9), is operatively connected to the braking input device (11), and is configured to control the flow of the pressurized hydraulic fluid from the hydraulic accumulator (8) to the brake assembly (9) according to the actuation of the braking input device (11).

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

A work machine (1) comprising a body (2), a dozer blade (20) movably carried by the body (2), a hydraulic actuator (22) interposed between the body (2) and the dozer blade (20), a hydraulic arrangement (24) configured to provide pressurized hydraulic fluid towards the hydraulic actuator (22) and comprising: a source of pressurized hydraulic fluid (25), at least one main control valve (30), which is fluidly interposed between the source of pressurized hydraulic fluid (25) and the hydraulic actuator (22), and is configured to control the flow of pressurized hydraulic fluid fed towards the first inlet and/or the second inlet of the hydraulic actuator (22), two hydraulic lines (32, 33) fluidly connecting the main control valve (30) with the two inlets of the hydraulic actuator (22), at least one check valve (35) arranged along the first hydraulic line (32) or the second hydraulic line (33), a pilot circuit (37) configured to actuate said main control valve (30), and comprising a floating control stage (45) configured to realize a floating function of the dozer blade of the hydraulic actuator (22) with the tank (28), and is configured to open the check valve (35).

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

A work vehicle (3) comprising an internal combustion engine (9), a hydraulic actuator (11); and a hydraulic arrangement (10) configured to provide a pressurized hydraulic fluid to the hydraulic actuator (11); the hydraulic arrangement (10) comprising: a hydraulic pump (14) carried by said internal combustion engine (9), a hydraulic circuit (16) adapted to fluidly connect the outlet of the hydraulic pump (14) with the hydraulic actuator (11); and electro-hydraulic portion (20), fluidly connected to the hydraulic circuit (16) and arranged in parallel to the hydraulic pump (14) and comprising: an electric machine (22) carried by the internal combustion engine (9); accumulator means (26) electrically connected to the electric machine (22) and configured to store the electric energy provided by said first electric machine (22); and electro-hydraulic pumping means (24), which are electrically connected to the electric machine (22) and to the accumulator means (26) and are fluidly connected to the first hydraulic circuit (16).

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

There is described method for controlling the engagement of a power-take-off assembly (4) of a work vehicle (1); the power-take-off assembly (4) is coupled to a powertrain assembly (2) of the work vehicle (1) for transmitting torque to a work implement carried by the work vehicle (1); the power-take-off assembly (4) comprises: an input shaft (6) carried by the powertrain assembly (2); an output shaft (8) connectable to the work implement; a power-take-off clutch (10) interposed between the input shaft (6) and the output shaft (8), and adapted to selectively engage the output shaft (8) with the input shaft (6); and electrically actuated valve means (12), which are interposed between the power-take-off clutch (10) and a source of pressurized fluid (16), to control the flow of the pressurized fluid fed towards the power-take-off clutch (10) control its engagement;the proposed method allows to control the engagement of the power-take-off assembly (4) in a progressive manner.

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …