CONTROLLER OF HYBRID CONSTRUCTION MACHINE
First Claim
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1. A controller of a hybrid construction machine, comprising:
- a variable displacement type of a main pump;
a regulator for controlling a tilt angle of the main pump;
an actuator activated by fluid discharged from the main pump;
a sensor detecting whether the actuator is activated or not;
a variable displacement type of a sub pump connected to a discharge side of the maim pump, a tilt angle of the sub pump being controlled by a tilt-angle control unit;
an electric motor for rotating the sub pump; and
a control unit for controlling the tilt-angle control unit and the electric motor,wherein, when the control unit receives an output signal from the sensor and determines that the actuator is activated, the control unit puts the electric motor into operation and operates the tilt-angle control unit to control a tilt angle of the sub pump.
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Accused Products
Abstract
Discharge energy of a rotation motor RM and a boom cylinder BC are used as an assist force for an electric motor MG. An assist motor AM and a sub pump SP driven by output of the electric motor MG are integrally rotated on the discharge side of main pumps MP1, MP2. The assist motor AM is rotated by the discharge energy of the rotation motor RM and the boom cylinder BC, and the driving force of the assist motor AM is used to assist the output of the electric motor MG.
10 Citations
8 Claims
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1. A controller of a hybrid construction machine, comprising:
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a variable displacement type of a main pump; a regulator for controlling a tilt angle of the main pump; an actuator activated by fluid discharged from the main pump; a sensor detecting whether the actuator is activated or not; a variable displacement type of a sub pump connected to a discharge side of the maim pump, a tilt angle of the sub pump being controlled by a tilt-angle control unit; an electric motor for rotating the sub pump; and a control unit for controlling the tilt-angle control unit and the electric motor, wherein, when the control unit receives an output signal from the sensor and determines that the actuator is activated, the control unit puts the electric motor into operation and operates the tilt-angle control unit to control a tilt angle of the sub pump. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification