Energy management and assembly coordination control method of hybrid excavator

Abstract

The invention discloses an energy management and assembly coordination control method for a parallel-series hybrid power digger. The method is characterized by comprising the following steps of: acquiring an electrical control signal of a hydraulic pump, pressure of a pump port, negative flow feedback pressure and information of the electrical control signal of the pump; transmitting the acquired data to a power calculation module in an entire machine controller to calculate current power requirement of the digger; and distributing power output of an engine and a motor in a power coordination module of the entire machine controller by applying a minimum power-assisted control algorithm according to the power requirement. The method has the advantages that: energy management and coordination control of each assembly are performed on a hybrid power driving system according to an actual working state of the parallel-series hybrid power digger, so that optimal energy distribution is realized; a series of problems of improved complexity of the driving system, structural change and the like caused by hybrid power of a vehicle driving system are solved; the fuel economy of an entire vehicle is improved to the greatest extent; the exhaust emission of the engine is reduced; the entire driving system reliably and effectively works; and the optimal performance for running of the entire vehicle is achieved.

Description

technical field [0001] The invention relates to the control field of a hybrid power engineering machinery drive system, which is suitable for a hybrid excavator adopting a hybrid power drive system, and specifically relates to a method for energy management and assembly coordination control of a hybrid power excavator . Background technique [0002] Today in the 21st century, energy and environmental issues have increasingly become severe issues that must be faced by human beings for their survival and sustainable development. Hybrid technology has been applied in many fields and has achieved good energy saving and environmental protection effects. With the increasing maturity of hybrid technology, hybrid excavators have become the development direction and research hotspot of future construction machinery due to their low energy consumption, low emission and strong feasibility. [0003] A hybrid excavator is a combination of an electric drive system and an auxiliary power...

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Problems solved by technology

[0004] The hybrid excavator installs three sets of drive systems (supercapacitor-rotary motor, supercapacitor-motor and internal combustion engine) on the excavator that originally only installed one drive system, which greatly increases the complexity of the drive system structure. And the difficulty of machine control and fault diagnosis

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