Excavator preloading method, device and excavator

Abstract

Embodiments of the present invention provide an excavator preloading system and method, and the excavator, which belong to the technical field of engineering machinery. The preloading system of the excavator includes a main pump connected to the engine and a negative feedback regulator located on the main pump, the negative feedback regulator is used to control the displacement of the main pump, and the system also includes: a controller , used to: determine the working state of the excavator when it is detected that the altitude is greater than a preset height; when the working state of the excavator is no action, control the main pump and the negative feedback regulator The negative feedback path is disconnected, and a preset pressure is provided to the negative feedback regulator to increase the load rate of the engine. The invention improves the dynamic characteristics, action speed and operating efficiency of the engine in plateau areas.

Description

technical field [0001] The invention relates to the technical field of construction machinery, in particular to a preloading method and device for an excavator and an excavator. Background technique [0002] Under the harsh environmental conditions in the plateau area, research data shows that the air density will decrease by 8-10% for every 1,000 meters above sea level. At 4,000 meters above sea level, the air density is only about 65% of that in the plain area. Excavators generally have a series of plateau adaptability problems, such as stalling, black smoke, and insufficient power. [0003] In order to make the excavator work normally in the plateau area, the existing excavator adopts the method of reducing the absorbed power of the hydraulic system in the plateau area. Although this method solves the phenomenon of stalling and stalling the car in the plateau area, the power performance is seriously reduced compared with the plain area, resulting in the action of the exca...

AI Technical Summary

Problems solved by technology

[0002] Under the harsh environmental conditions in plateau areas, research data show that the air density will decrease by 8-10% for every 1,000 meters above sea level. Excavators generally have a series of high-altitude adaptability problems such as car suffocation, black smoke, and insufficient power

[0003] In order to make the excavator work normally in the plateau area, the existing excavator in the plateau area adopts the method of reducing the absorbed power of the hydraulic system. Although this method solves the phenomenon of vehicle stalling and stalling in the plateau area, the power performance is seriously lower than that in the plain area, resulting in movement. Slow speed and low work efficiency

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