| 摘要 |
PROBLEM TO BE SOLVED: To provide a burnt gas distribution behavior measurement method capable of performing a quantitative measurement of an internal EGR concentration even under a condition that a temperature distribution exists. SOLUTION: This burnt gas distribution behavior measurement method for an internal combustion engine includes a first measurement process wherein a pre-burning mixture gas including a fluorescent precursor for producing, by burning, a burnt product generating fluorescence higher than that before burning, a base fuel and a reference substance corresponding to the burnt product is burned and a fluorescence intensity generated by the burnt gas after burning is measured, and a second measurement process wherein the pre-burning mixture gas including the fluorescent precursor and the base fuel is burned and the fluorescent intensity generated by the burnt gas after burning is measured. An inner EGR ratio distribution is obtained in accordance with a fluorescent intensity ratio distribution of the fluorescent intensity by the second measurement process and a difference between the fluorescent intensities by the first and second measurement processes, a concentration ratio between a concentration of the reference substance in the first measurement process and a concentration of the burnt product in the second measurement process and an average inner EGR ratio. COPYRIGHT: (C)2009,JPO&INPIT
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