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1.研究背景随着我国经济的飞速发展,液压挖掘机在基础设施建设领域日益发挥出越来越大的作用。液压挖掘机的作业工况复杂、恶劣,负载变化较大,操作状况千差万别,液压系统的效率波动较大,由此导致整机存在油耗大、能量利用率低等不足。随着能源不断紧缺,温室效应问题越来越严重以及环保要求的不断提高,节能技术研究逐渐成为该领域人们关注的焦点。为了提升和改善燃油利用率与环保性能,解决实际面临的挖掘机油耗高、排放差和经济性低的
1. Research Background With the rapid development of economy in our country, hydraulic excavators are playing more and more important roles in the field of infrastructure construction. Hydraulic excavator operating conditions complicated and harsh, large load changes, operating conditions vary widely, the hydraulic system efficiency fluctuations, resulting in the machine there is a large fuel consumption, low energy utilization and other deficiencies. With the continuous shortage of energy, the increasingly serious problem of the greenhouse effect and the continuous improvement of environmental protection requirements, the research on energy-saving technologies has gradually become the focus of attention in this field. In order to improve and improve fuel efficiency and environmental performance, to solve the actual excavator face high fuel consumption, poor emissions and low economic