Hydraulic excavators are widely used in construction, mining, transportation and other engineering practice, but the working environment of excavators is relatively bad, the load changes greatly, the engine often works in the deviation from the rated economic fuel consumption area, in the process of operation, the engine output power can not be fully absorbed by the variable displacement pump or the engine output power can not meet the requirements.The phenomenon of variable pump power demand, and often there are overload stall or overheating fault phenomenon, resulting in the operator set working mode and the actual working condition power does not match, so that the fuel consumption power increases, affecting the working efficiency of the whole machine.
The ideal energy-saving control system can adjust the displacement of the variable displacement pump according to the load change, make the engine output power match the input power of the variable displacement pump, stabilize the engine speed, reduce the fuel consumption rate, and overcome the shortcomings of low efficiency of the whole machine.
