Construction machinery control method and construction machinery

Abstract

The invention discloses a mechanical engineering control method and an engineering machine, belonging to the technical field of energy-saving and emission-reducing of an energy-saving method. The engineering machine comprises an engine and a hydraulic system used for driving an executing mechanism of the engineering machine, and the hydraulic system comprises a hydraulic pump, wherein the mechanical engineering control method comprises the following specific steps: step S1, finding the best efficiency working zone of the engine according to an universal characteristic curve of the engine, and selecting a rotate speed value from the best efficiency working zone; step S2, adjusting the rotate speed value of the engine to the rotate speed value selected in step S1; step S3, adjusting the flow of the hydraulic pump, so that the outlet pressure of the hydraulic pump is unchanged relative to the state when the rotate speed of the engine is not adjusted. The technical solution has the following beneficial effects that the mechanical engineering control method is simple to implement on the existing system and low in improvement cost. Through reducing the rotate speed of the engine, the discharge capacity of the hydraulic pump is increased; the energy-saving effect is remarkable, and the output power of the executing mechanism is not reduced.

Description

technical field [0001] The invention relates to an energy-saving method, in particular to a construction machinery control method and construction machinery. Background technique [0002] With the development of infrastructure, construction machinery has achieved unprecedented development, especially construction machinery that uses hydraulic systems to drive actuators, and has been widely used due to its ability to perform high-power, high-sensitivity operations. However, the total utilization rate of the energy of the existing construction machinery driven by the hydraulic system generally only reaches about 20%, and the huge energy loss makes the energy efficiency ratio of the existing construction machinery driven by the hydraulic system very poor. [0003] In view of the defect of poor energy efficiency ratio, the existing construction machinery control methods generally divide the system into multiple working modes according to different operating conditions to achieve...

AI Technical Summary

Problems solved by technology

However, there is a problem that it cannot meet the power requirements of the actuator when saving energy, and cannot achieve energy saving when the power requirements of the actuator are met.

Images