基于拖拉机整机效率最大化的液压机械无级变速规律

发布时间：2017-12-31 06:24

本文关键词：基于拖拉机整机效率最大化的液压机械无级变速规律　出处：《农业工程学报》2016年21期 　论文类型：期刊论文

【摘要】：为了实现对拖拉机多段液压机械无级变速传动(hydro-mechanical continuously variable transmission,HMCVT)在任意稳定行驶速度和许可牵引负载下经济性最佳的控制,该文对拖拉机经济性最佳的无级变速规律进行了研究。根据拖拉机能量传递的特点,考虑HMCVT在不同传动比下存在效率差异的特征,把研究拖拉机的经济性最佳转化为对整车效率最大的研究。在分析整机传动系统效率特性的基础上,针对效率最大的目标函数和约束条件,求解了整车效率数值,结果表明在任意目标车速和牵引负载下,优化后拖拉机整车效率在35%~40%之间,并得出了效率最大时HMCVT最佳传动比、发动机转速和转矩,确定了基于整车效率最大的拖拉机HMCVT传动变速原理。研究表明:基于整车效率最大化原则能够实现拖拉机在任意车速和牵引负载下的整车经济性最佳,根据整车效率最大化确定的拖拉机多段HMCVT经济性最佳无级变速规律,为下一步制定装备多段HMCVT的拖拉机的经济性最佳控制策略提供参考。
[Abstract]:In order to realize the continuously variable speed transmission of multi-stage hydraulic machinery for tractor (. Hydro-mechanical continuously variable transmission. HMCVT) is the best economic control under arbitrary stable driving speed and allowable traction load. In this paper, the stepless variable law of tractor economy is studied. According to the characteristics of tractor energy transfer. Considering the difference of efficiency of HMCVT under different transmission ratio, the optimum economic efficiency of tractor is transformed into the study of maximum efficiency of the whole vehicle. Based on the analysis of the efficiency characteristics of the transmission system of the whole machine. According to the maximum efficiency objective function and constraint conditions, the vehicle efficiency value is solved. The results show that the optimized tractor efficiency is between 35% and 40% under arbitrary target speed and traction load. The optimal transmission ratio of HMCVT, engine speed and torque are obtained when the efficiency is maximum. The principle of tractor HMCVT transmission and speed change based on the maximum efficiency of the whole vehicle is determined. The research shows that the principle of maximizing the efficiency of the whole vehicle can achieve the best economic performance of the tractor under arbitrary speed and traction load. According to the optimal stepless variable law of tractor multi-segment HMCVT economy determined by maximizing the efficiency of the whole vehicle, this paper provides a reference for the next step to formulate the optimal economic control strategy of tractor equipped with multi-segment HMCVT.
【作者单位】：河南科技大学机电工程学院;
【基金】：国家自然科学基金资助项目(51375145)
【分类号】：S219.0
【正文快照】： 张明柱,王全胜,白东洋,尹玉鑫,郝晓阳.基于拖拉机整机效率最大化的液压机械无级变速规律[J].农业工程学报,2016,32(21):74-78.doi:10.11975/j.issn.1002-6819.2016.21.010 http://www.tcsae.orgZhang Mingzhu,Wang Quansheng,Bai Dongyang,Yin Yuxin,Hao Xiaoyang.Speed chang

【相似文献】