基于振动信号及瞬时转速信号的HCCI燃烧模式辨识  

HCCI Combustion Mode Detection Based on Knock Sensor Signal and Instant Speed

作　　者：张宏超[1] 谢辉[1] 陈韬[1] 赵华[1] 

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

出　　处：《燃烧科学与技术》2012年第2期144-148,共5页Journal of Combustion Science and Technology

基　　金：国家重点基础研究发展计划(973计划)资助项目(2007CB210004)

摘　　要：HCCI汽油发动机一般采用组合燃烧控制策略,根据发动机工况不同,HCCI汽油机分别采用SI燃烧模式、SI-HCCI燃烧模式和HCCI燃烧模式.在这种控制方式下,燃烧模式的辨识具有非常重要的作用与意义.笔者在装有全可变气门系统的汽油HCCI发动机上,测取HCCI发动机各工况下爆震传感器信号和瞬时转速信号,用时频分析方法从爆震传感器信号和瞬时转速信号中提取了特征量,分析了它们和HCCI汽油机燃烧模式之间的关系.通过辨识函数分析,基于爆震传感器信号特征量和瞬时转速信号特征量,建立了的HCCI燃烧模式辨识模型.分析表明,HCCI燃烧模式辨识模型能够较好地辨识出HCCI的燃烧模式,总体辨识成功率在75%左右.HCCI engine adopts combined-mode combustion of pure SI combustion mode, SI-HCCI mode and pure HCCI mode. In such a HCCI combustion control, combustion mode identification becomes very important. Based on a great number of experiments conducted on HCCI engine bench equipped with a fully variable valve actuating system, analysis and comparison are made between knock signal, instant speed and combustion mode. Characteristic parameters are extracted from knock sensor signal and instant speed. Based on the discriminant function analysis, a combustion mode identification model is built with the characteristic parameters, which is simple in computation and easy to be implemented on microcontroller. It is shown that the model is capable of discriminating combustion modes, with the successful detecting rate of around 75%.

关 键 词：HCCI燃烧 燃烧模式 瞬时转速 爆震传感器 燃烧模式辨识 

分 类 号：TK4[动力工程及工程热物理—动力机械及工程]