Control method for reducing oil consumption of excavator engine

Abstract

The invention discloses a control method for reducing oil consumption of an excavator engine. The method comprises the following steps of: setting an overflow pressure value P0; detecting the hydraulic pressure value P of a system in real time through a pressure sensor of a main pump of the system, and transmitting the hydraulic pressure value P to a system controller; calculating the difference between the hydraulic pressure value P of the system and the set overflow pressure value P0 by the system controller, and obtaining system pressure change rate delta P by differential calculation; andadjusting the revolving speed of the engine by the system controller, ensuring that the system pressure is maintained nearby the overflow pressure value so as to fulfill the purposes of reducing the overflow rate and reducing the oil consumption of the engine. By the control method for reducing the oil consumption of the excavator engine, the output power of a hydraulic pump can be automatically controlled according to the work load of an excavator, so that the output power of the hydraulic pump is matched with the power required by the actual work of the excavator, the oil consumption of theexcavator is reduced and the energy is saved.

Description

technical field [0001] The invention relates to the technical field of hydraulic excavator control, in particular to a control method for reducing fuel consumption of an excavator engine. Background technique [0002] In the daily construction process of construction and production, excavators, as a commonly used construction machine, are widely used in foundation excavation of housing construction and cleaning after completion, urban pipeline laying, farmland water conservancy construction, etc., with flexible and efficient construction. high merit. The so-called excavator mainly refers to a hydraulic excavator in modern times, which is generally composed of a working device, a slewing device, a cab, a walking device and a control device. It is composed of an engine and a hydraulic pump. The engine drives the hydraulic pump to rotate. The pressure oil at the outlet of the hydraulic pump is distributed to each working device through the working spool, and the low-pressure o...

AI Technical Summary

Problems solved by technology

In fact, during the entire working process of the excavator, the hydraulic flow required at each stage is different. When the excavator performs compound actions or load-bearing work, the system pressure and flow requirements increase. When the excavator performs a single action or unloads When operating under light load, the demand for system pressure and flow decreases. If the engine maintains a constant speed during this series of processes, some energy will inevitably be wasted due to insufficient load.

This kind of selection of the working speed of the engine by means of human experience is unscientific, impractical, and not suitable for popularization.

Images