汽油机瞬态排放信号测试与特征分析的新动向

针对内燃机瞬态排放与稳态排放之间的差异，认为分析内燃机瞬态排放信号要有特殊的手段；回顾了混沌时间序列分析 特征参数族及将其运用于内燃机振动信号分析的工作；同时回顾了国外同行们将由符号动力学理论，混沌时间序列分析和信息理论发展起来的符号时间序列分析技术运用于内燃机瞬态数据分析和辨识的研究工作，给出了国外汽油机瞬态排放测试技术的发展状况，提出了可以基于符号时间序列分析对汽油机瞬态排放信号进行分析，获得瞬态排放的特征和影响因素。

The Characteristics Transient of Emission of Spark-ignited Engines Based on the Measure of Symbolic Time Series Analysis

Considering the difference between the transient emission and stable exhaust, the special measurement and analysis for the transient exhaust of combustion engine is needed. The characteristics of chaotic time series analysis, which are applied to the analysis on vibration signal of combustion engine by the authors of the paper, are reviewed. The research on analysis and identification of the transient data of combustion engine based on the symbolic time series analysis by foreign mates, which is developed from the symbolic dynamic theory, chaotic time series analysis and information theory, is present too. The abroad condition of development on test measures of transient exhaust is given. The thoughts, that the characteristics and influence factors about transient emission could be obtained by the transient emission signal analysis of spark ignited engines based on the symbolic time series analysis, are offered.