Evaporative emissions from vehicle fuel caps


The measurements of evaporative emissions from fuel caps on a large number of vehicles and some of diffusion and permeation models presented were discussed. The measurements were believed to be representative given the large number of vehicles tested and the high correlation of results with VOC-specific methods. It was found that the ability to make rapid measurements of evaporative emissions on in-use vehicles were potentially valuable since the current approach using a whole-vehicle chamber was time consuming. The experimental results indicate that the fuel cap leakage rates for most vehicles were below 1 mg/hr in warm seasons and lower in cool seasons.

Publication Title

Proceedings of the Air and Waste Management Association's Annual Meeting and Exhibition

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