重型车辆柴油机气缸当量漏气面积检测模型研究  

Research on Equivalent Air Leakage Area Detection Model of Heavy Vehicle Diesel Engine

作　　者：杨绍卿 翟振东 王宪成 王雪 YANG Shao-qing;ZHAI Zhen-dong;WANG Xian-cheng;WANG Xue(Department of Vehicle Engineering,Army Academy of Armored Force,Beijing 100072,China;Unit 71375 of PLA,Harbin 150000,Heilongjiang,China)

机构地区：[1]陆军装甲兵学院车辆工程系 [2]71375部队

出　　处：《兵工学报》2018年第10期1883-1891,共9页Acta Armamentarii

基　　金：国家"973"计划项目(201797301)

摘　　要：针对非拆解状态下重型车辆柴油机压缩过程缸内漏气状况难以定量检测的问题,建立柴油机缸套-活塞环漏气过程的双环几何简化模型。通过分析压缩行程中缸内气体的流量与压力变化,推导活塞环当量漏气面积的数学表达式。分析缸套-活塞环热变形对漏气面积的影响,建立缸套-活塞环的当量漏气面积检测模型。利用柴油机保险期试验的拆解检测数据验证模型的准确性。结果表明:当量漏气面积计算结果与柴油机缸套磨损状况一致,与柴油机工况相关性较低,该模型能够较为准确地反映柴油机当前的漏气状况。A double-ring geometric simplified model of the leakage process of diesel engine cylinder-piston ring is established for quantitatively detecting the leakage condition of diesel engine in the non-dismantling state.The mathematical expression of leakage area of piston ring is deduced by analyzing the flow and pressure changes of the cylinder air during compression stroke.The influence of thermal defor-mation of piston ring on the leakage is analyzed,and an equivalent air leakage area detection model of cylinder-piston ring is established.The results show that the equivalent air leakage area is consistent with the wear condition of diesel engine cylinder liner,the correlation with the working condition of diesel engine is low,and the proposed model can reflect the current leak condition of diesel engine.

关 键 词：重型车辆 柴油机 漏气检测 缸套-活塞环 台架试验 

分 类 号：TK427[动力工程及工程热物理—动力机械及工程]