Hybrid powered construction equipment
First Claim
1. A hybrid powered construction machine comprising:
- an engine;
a hydraulic pump powered by the engine;
hydraulic actuators activated by discharge oil from the hydraulic pump;
an electric motor which works in conjunction with the engine;
a dynamo electric generator powered by the engine;
a battery for storing electric power generated by the dynamo electric generator;
a power-up switch disposed in one of an operating lever and an operation panel; and
a controller which constantly controls a revolution speed of the engine in response to a signal from the power-up switch, and controls an output torque of the electric motor such that torque for assisting powering of the hydraulic pump is outputted.
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Accused Products
Abstract
Hybrid powered construction equipment is capable of making effective use of the output energy of an engine; increasing operating speed while keeping noise level low, and assuring operation power more than the performance of the engine. To this end, the hybrid powered construction equipment has a hydraulic pump powered by the engine; hydraulic actuators activated by discharge oil from the hydraulic pump; a motor-generator working in conjunction with the engine; and a battery for storing electric power generated by the electric motor-generator, the construction equipment further comprising a power-up switch disposed in an operating lever or operation panel and a controller which inputs a signal released from the power-up switch, wherein the controller constantly controls the revolution speed of the engine in response to a signal from the power-up switch and controls the output torque of the electric motor-generator such that torque for assisting powering of the hydraulic pump is output.
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Citations
4 Claims
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1. A hybrid powered construction machine comprising:
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an engine;
a hydraulic pump powered by the engine;
hydraulic actuators activated by discharge oil from the hydraulic pump;
an electric motor which works in conjunction with the engine;
a dynamo electric generator powered by the engine;
a battery for storing electric power generated by the dynamo electric generator;
a power-up switch disposed in one of an operating lever and an operation panel; and
a controller which constantly controls a revolution speed of the engine in response to a signal from the power-up switch, and controls an output torque of the electric motor such that torque for assisting powering of the hydraulic pump is outputted. - View Dependent Claims (2, 3, 4)
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Specification