Ford Global Technolgoies, LLC

Jeffrey Kaiser

Allen Joseph Lehmen

Timothy Robert Gernant

A method of monitoring evaporative emissions of a vehicle includes the steps of establishing a baseline pressure within a vehicle evaporative emission system during the occurrence of a vehicle-off condition, detecting a change in the baseline pressure during the vehicle-off condition, and indicating whether the change in the baseline pressure is within a desirable limit.

Diagnostic method for vehicle evaporative emissions

A fuel weathering method for an evaporative emission system of a motor vehicle includes determining a current temperature of liquid fuel inside the evaporative emission system, determining a fuel residency time representing the amount of time the fuel has resided above the current temperature, and performing a system diagnostic test of the evaporative emission system only if the fuel residency time exceeds a minimum fuel residency time.

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Milford, MI, United States of America

Jeffrey Kaiser