工程设计学报2018，Vol.25Issue(2)：142-150,9.DOI:10.3785/j.issn.1006-754X.2018.02.003
一种液压式连续可变压缩比技术的研究
Research on a hydraulic continuous variable compression ratio technique
摘要
Abstract
In order to improve the combustion efficiency of engine and reduce the emission of harmful gas,a design scheme of hydraulic continuous variable compression ratio(VCR) technique of engine was proposed.It was through the hydraulic system to control the eccentric pin rotation to change the location of the top dead center(TDC),so that the volume of the combus-tion chamber was changed to achieve the change of any continuous VCR in the adjustment inter-val.Firstly,the working principle of the hydraulic system in two different stages was analyzed according to the designed scheme.Then,3D software Solidworks 2010 was used to model the whole system,and the range of continuous VCR(8.81 22.43)was calculated according to the specific size of the model design.Lastly,the change of the comprehensive force(inertial force of piston system and gas pressure at the piston surface)under different speed was analyzed,and the combined simulation test of the constructed hydraulic system was carried out by MATLAB and AMESim.The flow characteristics and pressure characteristics of the hydraulic system was ex-plored at different speeds respectively with the resultant force exerts up and down.The simulation results showed that the piston system had fast response and good dynamic characteris-tics under the condition of medium and low speed,and the proposed design was proved usefully. The simulation results provide a theoretical basis for practical application of continuous VRC technique for hydraulic volume control,w hich has important practical guiding significance.关键词
连续可变压缩比/液压系统/动态特性Key words
continuously variable compression ratio/hydraulic system/dynamic characteristic分类
机械制造引用本文复制引用
吴中义,陈家兑,王自勤..一种液压式连续可变压缩比技术的研究[J].工程设计学报,2018,25(2):142-150,9.基金项目
国家科技支撑计划资助项目(2014BA H05F01) （2014BA H05F01）
贵州省科技厅项目(黔科合L H字[2014]7626) （黔科合L H字[2014]7626）
