液压自由活塞发动机活塞运动规律自适应特性的研究  

Research on Self-Adaptive Characteristic of Piston Motion of Hydraulic Free Piston Engine

作　　者：刘宇 汪洋[1] 田相龙[1] 耿鹤鸣 甄旭东[2] 胡耀辉 

机构地区：[1]天津大学内燃机燃烧学国家重点实验室,天津300072 [2]天津职业技术师范大学汽车与交通学院,天津300222

出　　处：《内燃机工程》2018年第1期86-92,共7页Chinese Internal Combustion Engine Engineering

基　　金：国家自然科学基金项目(51476113)~~

摘　　要：在一台液压自由活塞发动机(HFPE)样机上进行了活塞运动规率的试验。研究表明:活塞的运动规律对于燃烧相位和累积放热量的变动具有自适应性;随着燃烧相位的提前或累积放热量的增大,活塞换向提前,最大升程和压缩比降低;这种自适应性可有效避免均质压燃过程中的爆震与后燃现象,保证缸内最高压力、最大放热速率的稳定,减少指示功的损失。The test on the piston motion of a hydraulic free piston engine prototype was carried out.The result shows that the piston motion and compression ratio are self-adaptive to the variation of the combustion phase and aggregated heat release.The piston reversion is advanced and the maximum movement of the piston and the compression ratio are reduced with the advance of the combustion phase or the increase of aggregated heat release.This self-adaptive characteristic can effectively avoid the post-combustion and detonation phenomenon in homogeneous charge compression ignition combustion process,thus ensuring the stability of the maximum cylinder pressure and the maximum heat release rate,and reducing indicated work loss.

关 键 词：液压自由活塞发动机(HFPE) 活塞运动规律 压缩比 燃烧相位 均质压燃(HCCI) 

分 类 号：TK441[动力工程及工程热物理—动力机械及工程]