Control device and control method for construction machine

Abstract

The present disclosure relates to a control device and a control method for a construction machine. The control device and the control method for the construction machine according to the exemplary embodiment of the present disclosure may adjust an engine revolutions per minute (rpm) according to a load applied to the construction machine, thereby controlling an output of equipment. In the control device and the control method for the construction machine according to the exemplary embodiment of the present disclosure, an output of a pump is increased at an appropriate time, so that good operation performance may be maintained, and in the case of an operation pattern, in which a load is low, the engine rpm is adjusted to be decreased, thereby improving fuel efficiency.

Description

technical field [0001] The invention relates to a control device and a control method of a construction machine, which control the output of the device by adjusting the engine speed according to the load acting on the construction machine. Background technique [0002] Usually construction machinery has an engine and a hydraulic system. Engine output power. [0003] The hydraulic system may include a joystick, a pump, a main control valve, and a driver. [0004] The joystick can be operated according to the operator's purpose, and a pilot signal is formed according to the degree of displacement of the operation. [0005] The pump operates by the power and discharges high-pressure hydraulic oil, and the hydraulic oil is supplied to the main control valve. Additionally, multiple hydraulic pumps may be provided. [0006] The main control valve includes a plurality of valve units, and each of the valve units includes a valve body. Furthermore, the valve units are respective...

AI Technical Summary

Problems solved by technology

Therefore there is a possibility of wasting fuel when the existing excavator control method is in the eversion mode

[0023] On the other hand, when the load is determined to be low during descent and Boom down Swing mode, it is possible to set the engine speed too low

Therefore, the existing excavator control method has the problem that the reverse rotation speed of the upper body is too slow due to the decrease of the pump output.

[0024] Therefore, although the existing control device and control method for construction machinery can adjust and control the engine speed according to the fluctuation of the load, it cannot properly set the engine speed when the pump output needs to be increased or decreased, so the pump output is too low or the fuel efficiency is low. or issues with specific drives running noticeably slower

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