POWER CONTROL APPARATUS AND POWER CONTROL METHOD OF CONSTRUCTION MACHINE
First Claim
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1. A power control apparatus of a construction machine, comprising:
- an engine connected to a hydraulic pump to drive the hydraulic pump; and
a controller for calculating an engine load ratio defined as a ratio of a load torque of the engine for an engine maximum torque calculated from an input engine target RPM, and calculating an engine RPM command value according to the engine load ratio such that the engine is driven at the target RPM to output the calculated engine load ratio and engine RPM command value to the engine.
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Abstract
The present disclosure provides a power control apparatus of a construction machine, including: an engine connected to a hydraulic pump to drive the hydraulic pump; and a controller for calculating an engine load ratio defined as a ratio of a load torque of the engine for an engine maximum torque calculated from an input engine target RPM, and calculating an engine RPM command value according to the engine load ratio such that the engine is driven at the target RPM to output the calculated engine load ratio and engine RPM command value to the engine.
17 Citations
11 Claims
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1. A power control apparatus of a construction machine, comprising:
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an engine connected to a hydraulic pump to drive the hydraulic pump; and a controller for calculating an engine load ratio defined as a ratio of a load torque of the engine for an engine maximum torque calculated from an input engine target RPM, and calculating an engine RPM command value according to the engine load ratio such that the engine is driven at the target RPM to output the calculated engine load ratio and engine RPM command value to the engine. - View Dependent Claims (2, 3, 4, 5)
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6. A power control apparatus of a construction machine for controlling a hydraulic pump driven by an engine, comprising:
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a horse power regulating unit for varying a swash plate angle of the hydraulic pump to vary a required horse power of the hydraulic pump; a pressure sensor for detecting a load pressure of a working fluid discharged from the hydraulic pump; and a controller for calculating a target pump requiring horse power from the load pressure detected by the pressure sensor, and controlling a horse power regulating unit such that a required horse power of the hydraulic pump gradually approaches the target pump requiring horse power for a preset time. - View Dependent Claims (7, 8, 9)
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10. A power control method of a construction machine for controlling a hydraulic pump driven by an engine, comprising:
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calculating a current pump requiring horse power of the hydraulic pump; calculating a target pump requiring horse power from a load pressure of a working fluid discharged from the hydraulic pump; and gradually increasing a required horse power of the hydraulic pump from the current pump requiring horse power to the target pump requiring horse power for a preset time. - View Dependent Claims (11)
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Specification