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US 9,156,199 B2Granted
Method for operating a hybrid drive and hybrid drive
AssigneeNetstal-Maschinen AG
InventorsMarkus Notz, Markus Lanker
Life of this patent
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AssigneeNetstal-Maschinen AG
InventorsMarkus Notz, Markus Lanker
Estimating the term…
A hybrid drive includes an electric motor coupled to a hydraulic drive having a double-acting hydraulic piston and a piston rod, and a substantially throttle-less valve for actuating the hydraulic drive, and a control unit for actuating the electric machine. To avoid unnecessary energy consumption, an actuating direction requested by the hybrid drive and a desired actuating force are determined, the valve is switched to a position such that the hydraulic drive is effective in the actuating direction, at least when the actuating force cannot be generated by the electric motor alone, the difference between the force generated by the hydraulic drive and the actuating force is determined, and the electric motor is operated such that the desired actuating force is achieved by adding the force generated by the motor to the force generated by the hydraulic drive, or subtracting the first from the latter.
A method for operating a hybrid drive having an electric machine configured to be operated in generator mode or motor mode and a hydraulic drive with a hydraulic piston and a piston rod in mechanical engagement with the electric machine, the method comprising the steps of:
A hybrid drive, comprising:
Dependencies are inferred from the claim text.