基于燃烧离子传感技术的发动机指示转矩实时估计  

Realtime Estimation of Engine Indicated Torque Based on Ionization Sensing Technology

作　　者：董光宇[1] 于水[2] 张旭升[2] 李理光[1] 

机构地区：[1]同济大学汽车学院,上海201804 [2]上海交通大学机械及动力工程学院,上海200030

出　　处：《汽车工程》2008年第7期592-596,共5页Automotive Engineering

基　　金：国家重点基础研究计划资助项目(2007CB210005);国家“十一五”863项目(2006AA11A130)资助。

摘　　要：提出了一种基于缸内离子传感技术的发动机指示转矩估计方法。通过对发动机缸内燃烧生成离子电流的时域及频域分析,探讨了燃烧离子电流特征值与发动机指示转矩之间的关系。试验结果表明:在时域上,离子电流第二峰电压的大小和位置与发动机指示转矩具有良好的对应关系;在频域上,对离子电流信号进行了傅立叶变换后,其基频下的幅值与转矩对应关系更明显,因此,采用频域分析方法进行发动机转矩估计具有更高的精度,实时性也好。In this paper, a method of estimating engine indicated torque by using in-cylinder ionization sensing technique is presented. Through the analyses in both time-and frequency-domains on ion current generated by combustion in cylinder, the relation between ionized current signal and indicated torque of engine is investigated. The experiment results show that in time domain, the magnitude and corresponding crank-angle for the voltage of second peak ionized current are well correlated with indicated torque of engine; while in frequency domain, after Fourier transform on ion current, the above-mentioned correlation under baseband becomes more apparent. Therefore, the estimation of engine indicated torque by frequency-domain analysis has higher accuracy with good realtimeness.

关 键 词：发动机 指示转矩估计 缸内离子传感技术 

分 类 号：U464[机械工程—车辆工程]