Construction machinery, control system and control method thereof

Abstract

The invention discloses construction machinery, a control system and a control method thereof. The control system comprise an input device, a control device and an output device, wherein the input device acquires preset parameters; the control device obtains preset operation parameters according to the preset parameters and generates control signals according to the preset operation parameters which comprise a preset operation parameter of a prime mover and a preset operation parameter of a hydraulic system; the output device outputs the control signals generated by the control device; and the control signals comprise a control signal of the prime mover and a control signal of the hydraulic system. because of preset operation parameters obtained by the control device from the whole construction machinery according to the preset parameters, the power match among the prime mover, a hydraulic pump and a hydraulic execute component can be realized, the energy consumption of the whole construction machinery is lowered and the operation efficiency of the construction machinery is improved.

Description

technical field [0001] The invention relates to a control technology of construction machinery, in particular to a control system of construction machinery and construction machinery with the control system, and also to a control method of construction machinery. Background technique [0002] With the intensification of the contradiction between global energy supply and demand, energy issues have become increasingly prominent, how to rationally use energy to create more value has become the focus of today's society. [0003] The energy consumption cost of construction machinery is an important part of the current construction cost. Therefore, the energy consumption index of construction machinery has attracted more and more attention and attention. Taking fuel consumption as an example, according to statistics, the national construction machinery consumes 40 million tons of fuel every year, and the fuel consumption accounts for as high as 38% of the direct use cost of constr...

AI Technical Summary

Problems solved by technology

[0011] First, the output power of the hydraulic system of the construction machinery and the output power of the engine are adjusted separately, and adjusted according to different benchmarks. Therefore, the optimization of power distribution can only be realized locally in the construction machinery, and the overall power distribution optimization of the construction machinery cannot be realized.

In other words, since the output power of the hydraulic pump is adjusted according to the actual load, and the output power of the engine is adjusted according to the output power of the hydraulic pump, it is impossible to coordinate and allocate the output power of the hydraulic pump and the engine as a whole. Coordinating the output speed of the engine with the displacement of the hydraulic pump will not allow the hydraulic actuators to work at the most appropriate speed, which will inevitably increase the output of useless power

[0012] Second, the engine speed control process has obvious hysteresis

In the existing technical scheme, the output power of the hydraulic pump is first adjusted according to the load, and then the output power of the engine is adjusted according to the output power of the hydraulic pump after the hydraulic pump is adjusted. The lag of the speed control; further, this lag will cause energy loss and increase fuel consumption on the one hand; at the same time, it will also cause delays in the control actions of construction machinery, making the operation and control of construction machinery very inconvenient

[0013] Third, the adjustment of the engine output power is carried out after the adjustment of the hydraulic pump, that is to say, the adjustment of the engine output power is based on the steady state of the hydraulic system. Therefore, the power matching between the engine and the hydraulic pump is based on the steady state. Fundamental; however, the load of construction machinery is constantly changing, so the existing technical solutions fail to consider the dynamic changes of the load, so that the energy loss during state changes and state transitions cannot be avoided

[0015] To sum up, the existing technical solutions for power matching of construction machinery are only partial power matching, and it is difficult to realize the optimal configuration of the overall power of construction machinery, and it is impossible to further reduce the energy consumption of construction machinery

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