Electronically controlled engine and its energy-saving method, energy-saving device and construction machinery

Abstract

The invention discloses an electronic-controlled engine, an energy-saving method of the electronic-controlled engine, an energy-saving device of the electronic-controlled engine and an engineering machine. The energy-saving method of the electronic-controlled engine comprises the steps of obtaining output power of the electronic-controlled engine according to actual operation working conditions of the engineering machine, determining the current operation mode of the electronic-controlled engine according to the output power, determining an universal characteristic curve corresponding to the current operation mode according to the current operation mode, according to the universal characteristic curve, determining the optimal rotation speed of the electronic-controlled engine, adjusting the current actual rotation speed of the electronic-controlled engine into the optimal rotation speed, and enabling the electronic-controlled engine to operate in an optimal oil consumption area corresponding to the current working condition. Therefore, the optimal oil consumption area can be correspondingly set according to loads, and the purpose of effectively reducing energy consumption of the whole engine can be achieved according to the working condition with different loads.

Description

technical field [0001] The invention relates to the field of construction machinery, in particular to an electronically controlled engine, an energy-saving method, an energy-saving device and construction machinery. Background technique [0002] With the development of the global economy, construction machinery has achieved unprecedented development. Among them, although hydraulic excavators can perform various operations with high power and high sensitivity, the total utilization rate of their energy is only about 20%, and the huge energy loss makes energy saving Technology becomes the main topic at present. Among them, the engine is the power source of the excavator. With the increasing awareness of environmental protection in the world, more and more Euro Ⅲ and Euro Ⅳ electronically controlled engines are installed. mainstream of the system. [0003] At present, most traditional excavators use mechanical fuel system engines. According to different operating conditions, ...

AI Technical Summary

Problems solved by technology

[0005] like figure 1 As shown, although some energy-saving schemes change the external characteristic curve of the engine according to the load, that is to say, the maximum output power of the engine is simply limited, but the specific fuel consumption curve in the universal characteristic curve of the engine is not correspondingly Calibration, that is, to reduce fuel consumption when reducing engine power

In addition, the best fuel consumption area is often close to the light load (L) mode. When the heavy load (H) is under high load, the power is high, and the corresponding fuel consumption cannot be improved. Therefore, both can not be taken into account at the same time, so the fuel saving effect is limited.

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