1993-10-01

Volatility and Flammability of Variable Fuel Vehicle Tank Contents 932776

This paper presents the methodology and results of vapour pressure measurements and vapour phase composition determinations of M20, M50, M70 and M85 methanol-gasoline blends. These blends were chosen to span the range of composition which could be found in a variable fuel vehicle tank. Vapour pressures were measured at seven temperatures from -40°C to 40°C and at vapour liquid ratios of 4:1 and 500:1. The vapour phase composition was determined for these two vapour liquid ratios at temperatures of -28.9°C (-20°F) and -17.8°C (0°F). This paper also compares the theoretical predictions of vapour pressure and fuel/air equivalence ratio of the Royal Military College multicomponent fuel volatility model to the experimental measurements.

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