点燃式发动机爆震测量及其强度分析  

Knock Measurement and Its Intensity Analysis for Spark Ignition Engines

作　　者：高青[1] 金英爱[1] 孙志军[1] 孙济美[1] 方瑛[1] 

机构地区：[1]吉林大学热能工程系,长春130025

出　　处：《燃烧科学与技术》2003年第4期335-338,共4页Journal of Combustion Science and Technology

基　　金：国家自然科学基金资助项目(50076016).

摘　　要：利用光纤传感器和压力传感器对发动机缸内爆震燃烧进行探测,在研究和测量临界爆震及轻度爆震时,探索其应用的可行性.利用信号变化率以及表征爆震强度的带通信号峰值幅值指标和信号幅值时域均方根指标,系统比较了光信号和压力信号在测量临界爆震方面的应用.试验研究表明,光信号在研究临界爆震及轻度爆震燃烧等方面具有更明显优势.The application of optical fiber sensors and pressure transducers to detecting and measuring engine knock combustion was investigated. The feasibility to measure and detect the critical knock and light knock combustion was explored. Both the luminosity and pressure signals were compared quantitatively. The rate change of filtered signals to detect the knock occurrence crankangle, the maximum peak-to-peak amplitude of band-pass filtered signals (KI p-p) and the root-mean-square amplitude of the filtered signals (KI RMS) to characterize the knock intensity were determined. The investigation and analysis indicate that the luminosity signal from the fiber-optic sensor has greater potential for the research of the critical knock and the light knock.

关 键 词：发动机 爆震测量 临界爆震 

分 类 号：TK411.2[动力工程及工程热物理—动力机械及工程]