This study presents planar laser induced fluorescence data recorded within an optically accessible spray-guided direct-injection spark-ignition internal combustion engine at a repetition rate of 6 kHz. The data is calibrated to estimate the local distribution of the equivalence ratio within the combustion chamber from 50-10. BTDC. A standard reference fuel was used as a tracer. Cyclic fluctuations of the transient and spatial fuel distributions are presented. 汽車發(fā)動機多參量測試系統(tǒng)