测量多缸内燃机单缸充气量的流速-压力波方法  

Velocity-pressure wave measurement method of individual cylinder charging for multi-cylinder IC engine

作　　者：程鹏[1] 刘忠长[2] 郭英男[2] 刘金山[2] 谭满志[2] 宫宝利[3] 刘巽俊[2] 

机构地区：[1]吉林大学测试科学实验中心,长春130022 [2]吉林大学汽车工程学院,长春130022 [3]车辆排放与节能重庆市市级重点实验室,重庆400039

出　　处：《吉林大学学报（工学版）》2007年第1期69-73,共5页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家自然科学基金资助项目(50376019)

摘　　要：论述了一种基于稳定紊流运动沿通过截面径向的速度分布规律,对多缸内燃机各缸进气歧管内进气充量和充气效率的计算方法。利用奥地利AVL657内燃机数据采集分析仪和美国TSI公司IFA100热线/热膜恒温流速仪等测试设备测量各缸进气歧管内气体速度波和压力波等参数,通过计算获得了各缸各工况下的进气充量和充气效率。将各缸充气效率的平均值与同时实测的整机充气效率的平均值进行了比较,充气效率值最大相差4%,验证了该方法的可行性。得到的实验内燃机充气效率不均匀度最大值为9.1%。用这种方法可以定量研究多缸内燃机各缸进气充量的不均匀性。A new method for determination of the charging and the volumetric efficiency of the individual cylinder in a multi-cylinder internal combustion engine was proposed. The method is based on the measurement of the pressure wave in the intake system of the engine and the radial distribution of the velocity of the steady turbulence flow in a section of the intake port of each cylinder. The AVL657 digital analyzer was used to measure and record the charge pressure wave in the intake system and the TSI IFA100 hot-wire/hot-film constant temperature anemometer was used to measure and record the charge velocity in the intake port. The measurements were performed under motoring condition at different engine speeds and different throttle valve openings and the chargings and the volumetric efficiencies of each cylinder were calculated under different conditions. The average volumetric efficiencies of each cylinder were compared with that of the whole engine, and the maximal deviation was 0.04. The maximal unevenness of the volumetric efficiencies inside the engine was 9.1%. By means of the proposed method, it is possible to study quantitative the unevenness of charging of individual cylinder.

关 键 词：动力机械工程 内燃机 充气量 流速波 压力波 充气效率 测量 

分 类 号：TK412[动力工程及工程热物理—动力机械及工程]