Hydraulic circuit
AssigneeDana Italia S.R.L.
InventorsMatteo Stefani, Nicola Francesco Musciagna, Alessandro Sassi, Lorenzo Serrao
Life of this patent
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Abstract
The present disclosure relates to a hydraulic circuit, comprising: a hydraulic displacement unit for driving an implement; a hydraulic machine fluidly connected or selectively fluidly connected with the hydraulic displacement unit the hydraulic machine having a fixed hydraulic displacement; an electric machine drivingly engaged or selectively drivingly engaged with the hydraulic machine; a hydraulic pump fluidly connected or selectively fluidly connected with the hydraulic displacement unit, the hydraulic pump having a variable hydraulic displacement; and an electric motor drivingly engaged or selectively drivingly engaged with the hydraulic pump.
Claims16
A hydraulic circuit, comprising:
- a hydraulic displacement unit for driving an implement;
- a hydraulic machine fluidly connected or selectively fluidly connected with the hydraulic displacement unit, the hydraulic machine having a fixed hydraulic displacement;
- an electric machine drivingly engaged or selectively drivingly engaged with the hydraulic machine;
- a hydraulic pump fluidly connected or selectively fluidly connected with the hydraulic displacement unit, the hydraulic pump having a variable hydraulic displacement;
- an electric motor drivingly engaged or selectively drivingly engaged with the hydraulic pump;
- and
- a control unit configured to control the electric machine and the electric motor based at least on a requested flow rate through the hydraulic displacement unit and based on a threshold flow rate through the hydraulic displacement unit;
- wherein when the requested flow rate is below the threshold flow rate, the control unit is configured to halt the electric machine and to drive the hydraulic displacement unit via the electric motor and the hydraulic pump.
A hydraulic circuit, comprising:
- a hydraulic displacement unit for driving an implement;
- a hydraulic machine fluidly connected or selectively fluidly connected with the hydraulic displacement unit, the hydraulic machine having a fixed hydraulic displacement;
- an electric machine drivingly engaged or selectively drivingly engaged with the hydraulic machine;
- a hydraulic pump fluidly connected or selectively fluidly connected with the hydraulic displacement unit, the hydraulic pump having a variable hydraulic displacement;
- an electric motor drivingly engaged or selectively drivingly engaged with the hydraulic pump;
- at least one steering cylinder;
- at least one brake cylinder;
- at least one heat exchanger;
- and
- a further hydraulic pump drivingly engaged or selectively drivingly engaged with the electric motor;
- wherein the further hydraulic pump is fluidly connected or selectively fluidly connected with the at least one steering cylinder, with the at least one brake cylinder, and with the at least one heat exchanger.
Dependencies are inferred from the claim text.